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private String getGatewayMessage ( final List < Result > results ) throws IOException { int valueCount = 0 ; Writer writer = new StringWriter ( ) ; JsonGenerator g = jsonFactory . createGenerator ( writer ) ; g . writeStartObject ( ) ; g . writeNumberField ( "timestamp" , System . currentTimeMillis ( ) / 1000 ) ; g . writeNumberField ( "proto_version" , STACKDRIVER_PROTOCOL_VERSION ) ; g . writeArrayFieldStart ( "data" ) ; List < String > typeNames = this . getTypeNames ( ) ; for ( Result metric : results ) { if ( isNumeric ( metric . getValue ( ) ) ) { // we have a numeric value, write a value into the message StringBuilder nameBuilder = new StringBuilder ( ) ; // put the prefix if set if ( this . prefix != null ) { nameBuilder . append ( prefix ) ; nameBuilder . append ( "." ) ; } // put the class name or its alias if available if ( ! metric . getKeyAlias ( ) . isEmpty ( ) ) { nameBuilder . append ( metric . getKeyAlias ( ) ) ; } else { nameBuilder . append ( metric . getClassName ( ) ) ; } // Wildcard "typeNames" substitution String typeName = com . googlecode . jmxtrans . model . naming . StringUtils . cleanupStr ( TypeNameValuesStringBuilder . getDefaultBuilder ( ) . build ( typeNames , metric . getTypeName ( ) ) ) ; if ( typeName != null && typeName . length ( ) > 0 ) { nameBuilder . append ( "." ) ; nameBuilder . append ( typeName ) ; } // add the attribute name nameBuilder . append ( "." ) ; nameBuilder . append ( KeyUtils . getValueKey ( metric ) ) ; // check for Float/Double NaN since these will cause the message validation to fail if ( metric . getValue ( ) instanceof Float && ( ( Float ) metric . getValue ( ) ) . isNaN ( ) ) { logger . info ( "Metric value for " + nameBuilder . toString ( ) + " is NaN, skipping" ) ; continue ; } if ( metric . getValue ( ) instanceof Double && ( ( Double ) metric . getValue ( ) ) . isNaN ( ) ) { logger . info ( "Metric value for " + nameBuilder . toString ( ) + " is NaN, skipping" ) ; continue ; } valueCount ++ ; g . writeStartObject ( ) ; g . writeStringField ( "name" , nameBuilder . toString ( ) ) ; g . writeNumberField ( "value" , Double . valueOf ( metric . getValue ( ) . toString ( ) ) ) ; // if the metric is attached to an instance, include that in the message if ( instanceId != null && ! instanceId . isEmpty ( ) ) { g . writeStringField ( "instance" , instanceId ) ; } g . writeNumberField ( "collected_at" , metric . getEpoch ( ) / 1000 ) ; g . writeEndObject ( ) ; } } g . writeEndArray ( ) ; g . writeEndObject ( ) ; g . flush ( ) ; g . close ( ) ; // return the message if there are any values to report if ( valueCount > 0 ) { return writer . toString ( ) ; } else { return null ; } }
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Take query results make a JSON String
| 744
| 7
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158,501
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private void doSend ( final String gatewayMessage ) { HttpURLConnection urlConnection = null ; try { if ( proxy == null ) { urlConnection = ( HttpURLConnection ) gatewayUrl . openConnection ( ) ; } else { urlConnection = ( HttpURLConnection ) gatewayUrl . openConnection ( proxy ) ; } urlConnection . setRequestMethod ( "POST" ) ; urlConnection . setDoInput ( true ) ; urlConnection . setDoOutput ( true ) ; urlConnection . setReadTimeout ( timeoutInMillis ) ; urlConnection . setRequestProperty ( "content-type" , "application/json; charset=utf-8" ) ; urlConnection . setRequestProperty ( "x-stackdriver-apikey" , apiKey ) ; // Stackdriver's own implementation does not specify char encoding // to use. Let's take the simplest approach and at lest ensure that // if we have problems they can be reproduced in consistant ways. // See https://github.com/Stackdriver/stackdriver-custommetrics-java/blob/master/src/main/java/com/stackdriver/api/custommetrics/CustomMetricsPoster.java#L262 // for details. urlConnection . getOutputStream ( ) . write ( gatewayMessage . getBytes ( ISO_8859_1 ) ) ; int responseCode = urlConnection . getResponseCode ( ) ; if ( responseCode != 200 && responseCode != 201 ) { logger . warn ( "Failed to send results to Stackdriver server: responseCode=" + responseCode + " message=" + urlConnection . getResponseMessage ( ) ) ; } } catch ( Exception e ) { logger . warn ( "Failure to send result to Stackdriver server" , e ) ; } finally { if ( urlConnection != null ) { try { InputStream in = urlConnection . getInputStream ( ) ; in . close ( ) ; InputStream err = urlConnection . getErrorStream ( ) ; if ( err != null ) { err . close ( ) ; } urlConnection . disconnect ( ) ; } catch ( IOException e ) { logger . warn ( "Error flushing http connection for one result, continuing" ) ; logger . debug ( "Stack trace for the http connection, usually a network timeout" , e ) ; } } } }
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Post the formatted results to the gateway URL over HTTP
| 489
| 10
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158,502
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private void doMain ( ) throws Exception { // Start the process this . start ( ) ; while ( true ) { // look for some terminator // attempt to read off queue // process message // TODO : Make something here, maybe watch for files? try { Thread . sleep ( 5 ) ; } catch ( Exception e ) { log . info ( "shutting down" , e ) ; break ; } } this . unregisterMBeans ( ) ; }
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The real main method .
| 96
| 5
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158,503
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private void stopWriterAndClearMasterServerList ( ) { for ( Server server : this . masterServersList ) { for ( OutputWriter writer : server . getOutputWriters ( ) ) { try { writer . close ( ) ; } catch ( LifecycleException ex ) { log . error ( "Eror stopping writer: {}" , writer ) ; } } for ( Query query : server . getQueries ( ) ) { for ( OutputWriter writer : query . getOutputWriterInstances ( ) ) { try { writer . close ( ) ; log . debug ( "Stopped writer: {} for query: {}" , writer , query ) ; } catch ( LifecycleException ex ) { log . error ( "Error stopping writer: {} for query: {}" , writer , query , ex ) ; } } } } this . masterServersList = ImmutableList . of ( ) ; }
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Shut down the output writers and clear the master server list Used both during shutdown and when re - reading config files
| 188
| 22
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158,504
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private void startupWatchdir ( ) throws Exception { File dirToWatch ; if ( this . configuration . getProcessConfigDirOrFile ( ) . isFile ( ) ) { dirToWatch = new File ( FilenameUtils . getFullPath ( this . configuration . getProcessConfigDirOrFile ( ) . getAbsolutePath ( ) ) ) ; } else { dirToWatch = this . configuration . getProcessConfigDirOrFile ( ) ; } // start the watcher this . watcher = new WatchDir ( dirToWatch , this ) ; this . watcher . start ( ) ; }
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Startup the watchdir service .
| 126
| 7
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158,505
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public void executeStandalone ( JmxProcess process ) throws Exception { this . masterServersList = process . getServers ( ) ; this . serverScheduler . start ( ) ; this . processServersIntoJobs ( ) ; // Sleep for 10 seconds to wait for jobs to complete. // There should be a better way, but it seems that way isn't working // right now. Thread . sleep ( MILLISECONDS . convert ( 10 , SECONDS ) ) ; }
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Handy method which runs the JmxProcess
| 106
| 9
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158,506
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private void processFilesIntoServers ( ) throws LifecycleException { // Shutdown the outputwriters and clear the current server list - this gives us a clean // start when re-reading the json config files try { this . stopWriterAndClearMasterServerList ( ) ; } catch ( Exception e ) { log . error ( "Error while clearing master server list: " + e . getMessage ( ) , e ) ; throw new LifecycleException ( e ) ; } this . masterServersList = configurationParser . parseServers ( getProcessConfigFiles ( ) , configuration . isContinueOnJsonError ( ) ) ; }
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Processes all the json files and manages the dedup process
| 131
| 12
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private boolean isProcessConfigFile ( File file ) { if ( this . configuration . getProcessConfigDirOrFile ( ) . isFile ( ) ) { return file . equals ( this . configuration . getProcessConfigDirOrFile ( ) ) ; } // If the file doesn't exist anymore, treat it as a regular file (to handle file deletion events) if ( file . exists ( ) && ! file . isFile ( ) ) { return false ; } final String fileName = file . getName ( ) ; return ! fileName . startsWith ( "." ) && ( fileName . endsWith ( ".json" ) || fileName . endsWith ( ".yml" ) || fileName . endsWith ( ".yaml" ) ) ; }
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Are we a file and a JSON or YAML file?
| 157
| 13
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158,508
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@ Override @ JsonIgnore public JMXConnector getServerConnection ( ) throws IOException { JMXServiceURL url = getJmxServiceURL ( ) ; return JMXConnectorFactory . connect ( url , this . getEnvironment ( ) ) ; }
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Helper method for connecting to a Server . You need to close the resulting connection .
| 54
| 16
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158,509
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@ Override public void validateSetup ( Server server , Query query ) throws ValidationException { // Check if we've already created a logger for this file. If so, use it. Logger logger ; if ( loggers . containsKey ( outputFile ) ) { logger = getLogger ( outputFile ) ; } else { // need to create a logger try { logger = buildLogger ( outputFile ) ; loggers . put ( outputFile , logger ) ; } catch ( IOException e ) { throw new ValidationException ( "Failed to setup logback" , query , e ) ; } } logwriter = new LogWriter ( logger , delimiter ) ; }
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Creates the logging
| 141
| 4
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158,510
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@ Override public void internalWrite ( Server server , Query query , ImmutableList < Result > results ) throws Exception { graphiteWriter . write ( logwriter , server , query , results ) ; }
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The meat of the output . Reuses the GraphiteWriter2 class but writes in a logfile instead of a network socket .
| 42
| 26
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158,511
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private AmazonCloudWatchClient createCloudWatchClient ( ) { AmazonCloudWatchClient cloudWatchClient = new AmazonCloudWatchClient ( new InstanceProfileCredentialsProvider ( ) ) ; cloudWatchClient . setRegion ( checkNotNull ( Regions . getCurrentRegion ( ) , "Problems getting AWS metadata" ) ) ; return cloudWatchClient ; }
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Configuring the CloudWatch client .
| 73
| 7
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158,512
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@ Override public String formatName ( Result result ) { String formatted ; JexlContext context = new MapContext ( ) ; this . populateContext ( context , result ) ; try { formatted = ( String ) this . parsedExpr . evaluate ( context ) ; } catch ( JexlException jexlExc ) { LOG . error ( "error applying JEXL expression to query results" , jexlExc ) ; formatted = null ; } return formatted ; }
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Format the name for the given result .
| 99
| 8
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158,513
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protected void populateContext ( JexlContext context , Result result ) { context . set ( VAR_CLASSNAME , result . getClassName ( ) ) ; context . set ( VAR_ATTRIBUTE_NAME , result . getAttributeName ( ) ) ; context . set ( VAR_CLASSNAME_ALIAS , result . getKeyAlias ( ) ) ; Map < String , String > typeNameMap = TypeNameValue . extractMap ( result . getTypeName ( ) ) ; context . set ( VAR_TYPENAME , typeNameMap ) ; String effectiveClassname = result . getKeyAlias ( ) ; if ( effectiveClassname == null ) { effectiveClassname = result . getClassName ( ) ; } context . set ( VAR_EFFECTIVE_CLASSNAME , effectiveClassname ) ; context . set ( VAR_RESULT , result ) ; }
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Populate the context with values from the result .
| 190
| 10
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158,514
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public String getDataSourceName ( String typeName , String attributeName , List < String > valuePath ) { String result ; String entry = StringUtils . join ( valuePath , ' ' ) ; if ( typeName != null ) { result = typeName + attributeName + entry ; } else { result = attributeName + entry ; } if ( attributeName . length ( ) > 15 ) { String [ ] split = StringUtils . splitByCharacterTypeCamelCase ( attributeName ) ; String join = StringUtils . join ( split , ' ' ) ; attributeName = WordUtils . initials ( join , INITIALS ) ; } result = attributeName + DigestUtils . md5Hex ( result ) ; result = StringUtils . left ( result , 19 ) ; return result ; }
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rrd datasources must be less than 21 characters in length so work to make it shorter . Not ideal at all but works fairly well it seems .
| 171
| 30
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158,515
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protected void rrdToolUpdate ( String template , String data ) throws Exception { List < String > commands = new ArrayList <> ( ) ; commands . add ( binaryPath + "/rrdtool" ) ; commands . add ( "update" ) ; commands . add ( outputFile . getCanonicalPath ( ) ) ; commands . add ( "-t" ) ; commands . add ( template ) ; commands . add ( "N:" + data ) ; ProcessBuilder pb = new ProcessBuilder ( commands ) ; Process process = pb . start ( ) ; checkErrorStream ( process ) ; }
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Executes the rrdtool update command .
| 126
| 9
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158,516
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protected void rrdToolCreateDatabase ( RrdDef def ) throws Exception { List < String > commands = new ArrayList <> ( ) ; commands . add ( this . binaryPath + "/rrdtool" ) ; commands . add ( "create" ) ; commands . add ( this . outputFile . getCanonicalPath ( ) ) ; commands . add ( "-s" ) ; commands . add ( String . valueOf ( def . getStep ( ) ) ) ; for ( DsDef dsdef : def . getDsDefs ( ) ) { commands . add ( getDsDefStr ( dsdef ) ) ; } for ( ArcDef adef : def . getArcDefs ( ) ) { commands . add ( getRraStr ( adef ) ) ; } ProcessBuilder pb = new ProcessBuilder ( commands ) ; Process process = pb . start ( ) ; try { checkErrorStream ( process ) ; } finally { IOUtils . closeQuietly ( process . getInputStream ( ) ) ; IOUtils . closeQuietly ( process . getOutputStream ( ) ) ; IOUtils . closeQuietly ( process . getErrorStream ( ) ) ; } }
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Calls out to the rrdtool binary with the create command .
| 260
| 14
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158,517
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private void checkErrorStream ( Process process ) throws Exception { // rrdtool should use platform encoding (unless you did something // very strange with your installation of rrdtool). So let's be // explicit and use the presumed correct encoding to read errors. try ( InputStream is = process . getErrorStream ( ) ; InputStreamReader isr = new InputStreamReader ( is , Charset . defaultCharset ( ) ) ; BufferedReader br = new BufferedReader ( isr ) ) { StringBuilder sb = new StringBuilder ( ) ; String line ; while ( ( line = br . readLine ( ) ) != null ) { sb . append ( line ) ; } if ( sb . length ( ) > 0 ) { throw new RuntimeException ( sb . toString ( ) ) ; } } }
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Check to see if there was an error processing an rrdtool command
| 174
| 14
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158,518
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private String getRraStr ( ArcDef def ) { return "RRA:" + def . getConsolFun ( ) + ":" + def . getXff ( ) + ":" + def . getSteps ( ) + ":" + def . getRows ( ) ; }
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Generate a RRA line for rrdtool
| 61
| 10
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158,519
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private List < String > getDsNames ( DsDef [ ] defs ) { List < String > names = new ArrayList <> ( ) ; for ( DsDef def : defs ) { names . add ( def . getDsName ( ) ) ; } return names ; }
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Get a list of DsNames used to create the datasource .
| 61
| 14
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158,520
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public void add ( URL url ) { URLClassLoader sysLoader = ( URLClassLoader ) ClassLoader . getSystemClassLoader ( ) ; Class sysClass = URLClassLoader . class ; try { Method method = sysClass . getDeclaredMethod ( "addURL" , URL . class ) ; method . setAccessible ( true ) ; method . invoke ( sysLoader , new Object [ ] { url } ) ; } catch ( InvocationTargetException e ) { throw new JarLoadingException ( e ) ; } catch ( NoSuchMethodException e ) { throw new JarLoadingException ( e ) ; } catch ( IllegalAccessException e ) { throw new JarLoadingException ( e ) ; } }
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Add the given URL to the system class loader .
| 145
| 10
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158,521
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private static void describeClassTree ( Class < ? > inputClass , Set < Class < ? > > setOfClasses ) { // can't map null class if ( inputClass == null ) { return ; } // don't further analyze a class that has been analyzed already if ( Object . class . equals ( inputClass ) || setOfClasses . contains ( inputClass ) ) { return ; } // add to analysis set setOfClasses . add ( inputClass ) ; // perform super class analysis describeClassTree ( inputClass . getSuperclass ( ) , setOfClasses ) ; // perform analysis on interfaces for ( Class < ? > hasInterface : inputClass . getInterfaces ( ) ) { describeClassTree ( hasInterface , setOfClasses ) ; } }
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Recursive handler for describing the set of classes while using the setOfClasses parameter as a collector
| 162
| 20
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158,522
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private static Set < Class < ? > > describeClassTree ( Class < ? > inputClass ) { if ( inputClass == null ) { return Collections . emptySet ( ) ; } // create result collector Set < Class < ? > > classes = Sets . newLinkedHashSet ( ) ; // describe tree describeClassTree ( inputClass , classes ) ; return classes ; }
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Given an object return the set of classes that it extends or implements .
| 78
| 14
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158,523
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public void usage ( StringBuilder out , String indent ) { if ( commander . getDescriptions ( ) == null ) { commander . createDescriptions ( ) ; } boolean hasCommands = ! commander . getCommands ( ) . isEmpty ( ) ; boolean hasOptions = ! commander . getDescriptions ( ) . isEmpty ( ) ; // Indentation constants final int descriptionIndent = 6 ; final int indentCount = indent . length ( ) + descriptionIndent ; // Append first line (aka main line) of the usage appendMainLine ( out , hasOptions , hasCommands , indentCount , indent ) ; // Align the descriptions at the "longestName" column int longestName = 0 ; List < ParameterDescription > sortedParameters = Lists . newArrayList ( ) ; for ( ParameterDescription pd : commander . getFields ( ) . values ( ) ) { if ( ! pd . getParameter ( ) . hidden ( ) ) { sortedParameters . add ( pd ) ; // + to have an extra space between the name and the description int length = pd . getNames ( ) . length ( ) + 2 ; if ( length > longestName ) { longestName = length ; } } } // Sort the options sortedParameters . sort ( commander . getParameterDescriptionComparator ( ) ) ; // Append all the parameter names and descriptions appendAllParametersDetails ( out , indentCount , indent , sortedParameters ) ; // Append commands if they were specified if ( hasCommands ) { appendCommands ( out , indentCount , descriptionIndent , indent ) ; } }
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Stores the usage in the argument string builder with the argument indentation . This works by appending each portion of the help in the following order . Their outputs can be modified by overriding them in a subclass of this class .
| 340
| 45
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158,524
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@ SuppressWarnings ( "deprecation" ) private ResourceBundle findResourceBundle ( Object o ) { ResourceBundle result = null ; Parameters p = o . getClass ( ) . getAnnotation ( Parameters . class ) ; if ( p != null && ! isEmpty ( p . resourceBundle ( ) ) ) { result = ResourceBundle . getBundle ( p . resourceBundle ( ) , Locale . getDefault ( ) ) ; } else { com . beust . jcommander . ResourceBundle a = o . getClass ( ) . getAnnotation ( com . beust . jcommander . ResourceBundle . class ) ; if ( a != null && ! isEmpty ( a . value ( ) ) ) { result = ResourceBundle . getBundle ( a . value ( ) , Locale . getDefault ( ) ) ; } } return result ; }
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Find the resource bundle in the annotations .
| 192
| 8
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158,525
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public final void addObject ( Object object ) { if ( object instanceof Iterable ) { // Iterable for ( Object o : ( Iterable < ? > ) object ) { objects . add ( o ) ; } } else if ( object . getClass ( ) . isArray ( ) ) { // Array for ( Object o : ( Object [ ] ) object ) { objects . add ( o ) ; } } else { // Single object objects . add ( object ) ; } }
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declared final since this is invoked from constructors
| 100
| 10
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158,526
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public void parse ( String ... args ) { try { parse ( true /* validate */ , args ) ; } catch ( ParameterException ex ) { ex . setJCommander ( this ) ; throw ex ; } }
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Parse and validate the command line parameters .
| 45
| 9
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158,527
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private void validateOptions ( ) { // No validation if we found a help parameter if ( helpWasSpecified ) { return ; } if ( ! requiredFields . isEmpty ( ) ) { List < String > missingFields = new ArrayList <> ( ) ; for ( ParameterDescription pd : requiredFields . values ( ) ) { missingFields . add ( "[" + Strings . join ( " | " , pd . getParameter ( ) . names ( ) ) + "]" ) ; } String message = Strings . join ( ", " , missingFields ) ; throw new ParameterException ( "The following " + pluralize ( requiredFields . size ( ) , "option is required: " , "options are required: " ) + message ) ; } if ( mainParameter != null && mainParameter . description != null ) { ParameterDescription mainParameterDescription = mainParameter . description ; // Make sure we have a main parameter if it was required if ( mainParameterDescription . getParameter ( ) . required ( ) && ! mainParameterDescription . isAssigned ( ) ) { throw new ParameterException ( "Main parameters are required (\"" + mainParameterDescription . getDescription ( ) + "\")" ) ; } // If the main parameter has an arity, make sure the correct number of parameters was passed int arity = mainParameterDescription . getParameter ( ) . arity ( ) ; if ( arity != Parameter . DEFAULT_ARITY ) { Object value = mainParameterDescription . getParameterized ( ) . get ( mainParameter . object ) ; if ( List . class . isAssignableFrom ( value . getClass ( ) ) ) { int size = ( ( List < ? > ) value ) . size ( ) ; if ( size != arity ) { throw new ParameterException ( "There should be exactly " + arity + " main parameters but " + size + " were found" ) ; } } } } }
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Make sure that all the required parameters have received a value .
| 416
| 12
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158,528
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private List < String > readFile ( String fileName ) { List < String > result = Lists . newArrayList ( ) ; try ( BufferedReader bufRead = Files . newBufferedReader ( Paths . get ( fileName ) , options . atFileCharset ) ) { String line ; // Read through file one line at time. Print line # and line while ( ( line = bufRead . readLine ( ) ) != null ) { // Allow empty lines and # comments in these at files if ( line . length ( ) > 0 && ! line . trim ( ) . startsWith ( "#" ) ) { result . add ( line ) ; } } } catch ( IOException e ) { throw new ParameterException ( "Could not read file " + fileName + ": " + e ) ; } return result ; }
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Reads the file specified by filename and returns the file content as a string . End of lines are replaced by a space .
| 176
| 25
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158,529
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private static String trim ( String string ) { String result = string . trim ( ) ; if ( result . startsWith ( "\"" ) && result . endsWith ( "\"" ) && result . length ( ) > 1 ) { result = result . substring ( 1 , result . length ( ) - 1 ) ; } return result ; }
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Remove spaces at both ends and handle double quotes .
| 72
| 10
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158,530
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private char [ ] readPassword ( String description , boolean echoInput ) { getConsole ( ) . print ( description + ": " ) ; return getConsole ( ) . readPassword ( echoInput ) ; }
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Invoke Console . readPassword through reflection to avoid depending on Java 6 .
| 43
| 15
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158,531
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public void setProgramName ( String name , String ... aliases ) { programName = new ProgramName ( name , Arrays . asList ( aliases ) ) ; }
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Set the program name
| 34
| 4
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158,532
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public void addConverterFactory ( final IStringConverterFactory converterFactory ) { addConverterInstanceFactory ( new IStringConverterInstanceFactory ( ) { @ SuppressWarnings ( "unchecked" ) @ Override public IStringConverter < ? > getConverterInstance ( Parameter parameter , Class < ? > forType , String optionName ) { final Class < ? extends IStringConverter < ? > > converterClass = converterFactory . getConverter ( forType ) ; try { if ( optionName == null ) { optionName = parameter . names ( ) . length > 0 ? parameter . names ( ) [ 0 ] : "[Main class]" ; } return converterClass != null ? instantiateConverter ( optionName , converterClass ) : null ; } catch ( InstantiationException | IllegalAccessException | InvocationTargetException e ) { throw new ParameterException ( e ) ; } } } ) ; }
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Adds a factory to lookup string converters . The added factory is used prior to previously added factories .
| 204
| 20
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158,533
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public void addCommand ( String name , Object object , String ... aliases ) { JCommander jc = new JCommander ( options ) ; jc . addObject ( object ) ; jc . createDescriptions ( ) ; jc . setProgramName ( name , aliases ) ; ProgramName progName = jc . programName ; commands . put ( progName , jc ) ; /* * Register aliases */ //register command name as an alias of itself for reverse lookup //Note: Name clash check is intentionally omitted to resemble the // original behaviour of clashing commands. // Aliases are, however, are strictly checked for name clashes. aliasMap . put ( new StringKey ( name ) , progName ) ; for ( String a : aliases ) { IKey alias = new StringKey ( a ) ; //omit pointless aliases to avoid name clash exception if ( ! alias . equals ( name ) ) { ProgramName mappedName = aliasMap . get ( alias ) ; if ( mappedName != null && ! mappedName . equals ( progName ) ) { throw new ParameterException ( "Cannot set alias " + alias + " for " + name + " command because it has already been defined for " + mappedName . name + " command" ) ; } aliasMap . put ( alias , progName ) ; } } }
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Add a command object and its aliases .
| 278
| 8
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158,534
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private boolean itemIsObscuredByHeader ( RecyclerView parent , View item , View header , int orientation ) { RecyclerView . LayoutParams layoutParams = ( RecyclerView . LayoutParams ) item . getLayoutParams ( ) ; mDimensionCalculator . initMargins ( mTempRect1 , header ) ; int adapterPosition = parent . getChildAdapterPosition ( item ) ; if ( adapterPosition == RecyclerView . NO_POSITION || mHeaderProvider . getHeader ( parent , adapterPosition ) != header ) { // Resolves https://github.com/timehop/sticky-headers-recyclerview/issues/36 // Handles an edge case where a trailing header is smaller than the current sticky header. return false ; } if ( orientation == LinearLayoutManager . VERTICAL ) { int itemTop = item . getTop ( ) - layoutParams . topMargin ; int headerBottom = getListTop ( parent ) + header . getBottom ( ) + mTempRect1 . bottom + mTempRect1 . top ; if ( itemTop >= headerBottom ) { return false ; } } else { int itemLeft = item . getLeft ( ) - layoutParams . leftMargin ; int headerRight = getListLeft ( parent ) + header . getRight ( ) + mTempRect1 . right + mTempRect1 . left ; if ( itemLeft >= headerRight ) { return false ; } } return true ; }
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Determines if an item is obscured by a header
| 317
| 11
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158,535
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public void drawHeader ( RecyclerView recyclerView , Canvas canvas , View header , Rect offset ) { canvas . save ( ) ; if ( recyclerView . getLayoutManager ( ) . getClipToPadding ( ) ) { // Clip drawing of headers to the padding of the RecyclerView. Avoids drawing in the padding initClipRectForHeader ( mTempRect , recyclerView , header ) ; canvas . clipRect ( mTempRect ) ; } canvas . translate ( offset . left , offset . top ) ; header . draw ( canvas ) ; canvas . restore ( ) ; }
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Draws a header to a canvas offsetting by some x and y amount
| 129
| 15
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158,536
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public static boolean isIanaRel ( String relation ) { Assert . notNull ( relation , "Link relation must not be null!" ) ; return LINK_RELATIONS . stream ( ) // . anyMatch ( it -> it . value ( ) . equalsIgnoreCase ( relation ) ) ; }
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Is this relation an IANA standard? Per RFC 8288 parsing of link relations is case insensitive .
| 62
| 20
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158,537
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public List < MethodParameter > getParametersOfType ( Class < ? > type ) { Assert . notNull ( type , "Type must not be null!" ) ; return getParameters ( ) . stream ( ) // . filter ( it -> it . getParameterType ( ) . equals ( type ) ) // . collect ( Collectors . toList ( ) ) ; }
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Returns all parameters of the given type .
| 77
| 8
|
158,538
|
public static boolean isTemplate ( String candidate ) { return StringUtils . hasText ( candidate ) // ? VARIABLE_REGEX . matcher ( candidate ) . find ( ) : false ; }
|
Returns whether the given candidate is a URI template .
| 43
| 10
|
158,539
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public List < String > getVariableNames ( ) { return variables . asList ( ) . stream ( ) // . map ( TemplateVariable :: getName ) // . collect ( Collectors . toList ( ) ) ; }
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Returns the names of the variables discovered .
| 46
| 8
|
158,540
|
private static String join ( String typeMapping , String mapping ) { return MULTIPLE_SLASHES . matcher ( typeMapping . concat ( "/" ) . concat ( mapping ) ) . replaceAll ( "/" ) ; }
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Joins the given mappings making sure exactly one slash .
| 53
| 12
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158,541
|
public static String encodePath ( Object source ) { Assert . notNull ( source , "Path value must not be null!" ) ; try { return UriUtils . encodePath ( source . toString ( ) , ENCODING ) ; } catch ( Throwable e ) { throw new IllegalStateException ( e ) ; } }
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Encodes the given path value .
| 70
| 7
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158,542
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public static String encodeParameter ( Object source ) { Assert . notNull ( source , "Request parameter value must not be null!" ) ; try { return UriUtils . encodeQueryParam ( source . toString ( ) , ENCODING ) ; } catch ( Throwable e ) { throw new IllegalStateException ( e ) ; } }
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Encodes the given request parameter value .
| 72
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protected D createModelWithId ( Object id , T entity ) { return createModelWithId ( id , entity , new Object [ 0 ] ) ; }
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Creates a new resource with a self link to the given id .
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private static void validate ( RepresentationModel < ? > resource , HalFormsAffordanceModel model ) { String affordanceUri = model . getURI ( ) ; String selfLinkUri = resource . getRequiredLink ( IanaLinkRelations . SELF . value ( ) ) . expand ( ) . getHref ( ) ; if ( ! affordanceUri . equals ( selfLinkUri ) ) { throw new IllegalStateException ( "Affordance's URI " + affordanceUri + " doesn't match self link " + selfLinkUri + " as expected in HAL-FORMS" ) ; } }
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Verify that the resource s self link and the affordance s URI have the same relative path .
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public Hop withParameter ( String name , Object value ) { Assert . hasText ( name , "Name must not be null or empty!" ) ; HashMap < String , Object > parameters = new HashMap <> ( this . parameters ) ; parameters . put ( name , value ) ; return new Hop ( this . rel , parameters , this . headers ) ; }
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Add one parameter to the map of parameters .
| 76
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public Hop header ( String headerName , String headerValue ) { Assert . hasText ( headerName , "headerName must not be null or empty!" ) ; if ( this . headers == HttpHeaders . EMPTY ) { HttpHeaders newHeaders = new HttpHeaders ( ) ; newHeaders . add ( headerName , headerValue ) ; return new Hop ( this . rel , this . parameters , newHeaders ) ; } this . headers . add ( headerName , headerValue ) ; return this ; }
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Add one header to the HttpHeaders collection .
| 113
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private static List < UberData > doExtractLinksAndContent ( Object item ) { if ( item instanceof EntityModel ) { return extractLinksAndContent ( ( EntityModel < ? > ) item ) ; } if ( item instanceof RepresentationModel ) { return extractLinksAndContent ( ( RepresentationModel < ? > ) item ) ; } return extractLinksAndContent ( new EntityModel <> ( item ) ) ; }
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Extract links and content from an object of any type .
| 89
| 12
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@ JsonIgnore public HalFormsTemplate getTemplate ( String key ) { Assert . notNull ( key , "Template key must not be null!" ) ; return this . templates . get ( key ) ; }
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Returns the template with the given name .
| 46
| 8
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public HalFormsDocument < T > andEmbedded ( HalLinkRelation key , Object value ) { Assert . notNull ( key , "Embedded key must not be null!" ) ; Assert . notNull ( value , "Embedded value must not be null!" ) ; Map < HalLinkRelation , Object > embedded = new HashMap <> ( this . embedded ) ; embedded . put ( key , value ) ; return new HalFormsDocument <> ( resource , resources , embedded , pageMetadata , links , templates ) ; }
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Adds the given value as embedded one .
| 116
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@ Nullable public Object toRawData ( JavaType javaType ) { if ( this . data . isEmpty ( ) ) { return null ; } if ( PRIMITIVE_TYPES . contains ( javaType . getRawClass ( ) ) ) { return this . data . get ( 0 ) . getValue ( ) ; } return PropertyUtils . createObjectFromProperties ( javaType . getRawClass ( ) , // this . data . stream ( ) . collect ( Collectors . toMap ( CollectionJsonData :: getName , CollectionJsonData :: getValue ) ) ) ; }
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Generate an object used the deserialized properties and the provided type from the deserializer .
| 128
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@ SuppressWarnings ( "unchecked" ) public T add ( Link link ) { Assert . notNull ( link , "Link must not be null!" ) ; this . links . add ( link ) ; return ( T ) this ; }
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Adds the given link to the resource .
| 53
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private static void insertJsonColumn ( CqlSession session ) { User alice = new User ( "alice" , 30 ) ; User bob = new User ( "bob" , 35 ) ; // Build and execute a simple statement Statement stmt = insertInto ( "examples" , "json_jackson_column" ) . value ( "id" , literal ( 1 ) ) // the User object will be converted into a String and persisted into the VARCHAR column // "json" . value ( "json" , literal ( alice , session . getContext ( ) . getCodecRegistry ( ) ) ) . build ( ) ; session . execute ( stmt ) ; // The JSON object can be a bound value if the statement is prepared // (subsequent calls to the prepare() method will return cached statement) PreparedStatement pst = session . prepare ( insertInto ( "examples" , "json_jackson_column" ) . value ( "id" , bindMarker ( "id" ) ) . value ( "json" , bindMarker ( "json" ) ) . build ( ) ) ; session . execute ( pst . bind ( ) . setInt ( "id" , 2 ) . set ( "json" , bob , User . class ) ) ; }
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Mapping a User instance to a table column
| 278
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private static void selectJsonColumn ( CqlSession session ) { Statement stmt = selectFrom ( "examples" , "json_jackson_column" ) . all ( ) . whereColumn ( "id" ) . in ( literal ( 1 ) , literal ( 2 ) ) . build ( ) ; ResultSet rows = session . execute ( stmt ) ; for ( Row row : rows ) { int id = row . getInt ( "id" ) ; // retrieve the JSON payload and convert it to a User instance User user = row . get ( "json" , User . class ) ; // it is also possible to retrieve the raw JSON payload String json = row . getString ( "json" ) ; System . out . printf ( "Retrieved row:%n id %d%n user %s%n user (raw) %s%n%n" , id , user , json ) ; } }
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Retrieving User instances from a table column
| 194
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public static String opcodeString ( int opcode ) { switch ( opcode ) { case ProtocolConstants . Opcode . ERROR : return "ERROR" ; case ProtocolConstants . Opcode . STARTUP : return "STARTUP" ; case ProtocolConstants . Opcode . READY : return "READY" ; case ProtocolConstants . Opcode . AUTHENTICATE : return "AUTHENTICATE" ; case ProtocolConstants . Opcode . OPTIONS : return "OPTIONS" ; case ProtocolConstants . Opcode . SUPPORTED : return "SUPPORTED" ; case ProtocolConstants . Opcode . QUERY : return "QUERY" ; case ProtocolConstants . Opcode . RESULT : return "RESULT" ; case ProtocolConstants . Opcode . PREPARE : return "PREPARE" ; case ProtocolConstants . Opcode . EXECUTE : return "EXECUTE" ; case ProtocolConstants . Opcode . REGISTER : return "REGISTER" ; case ProtocolConstants . Opcode . EVENT : return "EVENT" ; case ProtocolConstants . Opcode . BATCH : return "BATCH" ; case ProtocolConstants . Opcode . AUTH_CHALLENGE : return "AUTH_CHALLENGE" ; case ProtocolConstants . Opcode . AUTH_RESPONSE : return "AUTH_RESPONSE" ; case ProtocolConstants . Opcode . AUTH_SUCCESS : return "AUTH_SUCCESS" ; default : return "0x" + Integer . toHexString ( opcode ) ; } }
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Formats a message opcode for logs and error messages .
| 345
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public static String errorCodeString ( int errorCode ) { switch ( errorCode ) { case ProtocolConstants . ErrorCode . SERVER_ERROR : return "SERVER_ERROR" ; case ProtocolConstants . ErrorCode . PROTOCOL_ERROR : return "PROTOCOL_ERROR" ; case ProtocolConstants . ErrorCode . AUTH_ERROR : return "AUTH_ERROR" ; case ProtocolConstants . ErrorCode . UNAVAILABLE : return "UNAVAILABLE" ; case ProtocolConstants . ErrorCode . OVERLOADED : return "OVERLOADED" ; case ProtocolConstants . ErrorCode . IS_BOOTSTRAPPING : return "IS_BOOTSTRAPPING" ; case ProtocolConstants . ErrorCode . TRUNCATE_ERROR : return "TRUNCATE_ERROR" ; case ProtocolConstants . ErrorCode . WRITE_TIMEOUT : return "WRITE_TIMEOUT" ; case ProtocolConstants . ErrorCode . READ_TIMEOUT : return "READ_TIMEOUT" ; case ProtocolConstants . ErrorCode . READ_FAILURE : return "READ_FAILURE" ; case ProtocolConstants . ErrorCode . FUNCTION_FAILURE : return "FUNCTION_FAILURE" ; case ProtocolConstants . ErrorCode . WRITE_FAILURE : return "WRITE_FAILURE" ; case ProtocolConstants . ErrorCode . SYNTAX_ERROR : return "SYNTAX_ERROR" ; case ProtocolConstants . ErrorCode . UNAUTHORIZED : return "UNAUTHORIZED" ; case ProtocolConstants . ErrorCode . INVALID : return "INVALID" ; case ProtocolConstants . ErrorCode . CONFIG_ERROR : return "CONFIG_ERROR" ; case ProtocolConstants . ErrorCode . ALREADY_EXISTS : return "ALREADY_EXISTS" ; case ProtocolConstants . ErrorCode . UNPREPARED : return "UNPREPARED" ; default : return "0x" + Integer . toHexString ( errorCode ) ; } }
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Formats an error code for logs and error messages .
| 452
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public void reconnectNow ( boolean forceIfStopped ) { assert executor . inEventLoop ( ) ; if ( state == State . ATTEMPT_IN_PROGRESS || state == State . STOP_AFTER_CURRENT ) { LOG . debug ( "[{}] reconnectNow and current attempt was still running, letting it complete" , logPrefix ) ; if ( state == State . STOP_AFTER_CURRENT ) { // Make sure that we will schedule other attempts if this one fails. state = State . ATTEMPT_IN_PROGRESS ; } } else if ( state == State . STOPPED && ! forceIfStopped ) { LOG . debug ( "[{}] reconnectNow(false) while stopped, nothing to do" , logPrefix ) ; } else { assert state == State . SCHEDULED || ( state == State . STOPPED && forceIfStopped ) ; LOG . debug ( "[{}] Forcing next attempt now" , logPrefix ) ; if ( nextAttempt != null ) { nextAttempt . cancel ( true ) ; } try { onNextAttemptStarted ( reconnectionTask . call ( ) ) ; } catch ( Exception e ) { Loggers . warnWithException ( LOG , "[{}] Uncaught error while starting reconnection attempt" , logPrefix , e ) ; scheduleNextAttempt ( ) ; } } }
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Forces a reconnection now without waiting for the next scheduled attempt .
| 295
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private void onNextAttemptStarted ( CompletionStage < Boolean > futureOutcome ) { assert executor . inEventLoop ( ) ; state = State . ATTEMPT_IN_PROGRESS ; futureOutcome . whenCompleteAsync ( this :: onNextAttemptCompleted , executor ) . exceptionally ( UncaughtExceptions :: log ) ; }
|
the CompletableFuture to find out if that succeeded or not .
| 73
| 14
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public static < T > T getCompleted ( CompletionStage < T > stage ) { CompletableFuture < T > future = stage . toCompletableFuture ( ) ; Preconditions . checkArgument ( future . isDone ( ) && ! future . isCompletedExceptionally ( ) ) ; try { return future . get ( ) ; } catch ( InterruptedException | ExecutionException e ) { // Neither can happen given the precondition throw new AssertionError ( "Unexpected error" , e ) ; } }
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Get the result now when we know for sure that the future is complete .
| 111
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public static Throwable getFailed ( CompletionStage < ? > stage ) { CompletableFuture < ? > future = stage . toCompletableFuture ( ) ; Preconditions . checkArgument ( future . isCompletedExceptionally ( ) ) ; try { future . get ( ) ; throw new AssertionError ( "future should be failed" ) ; } catch ( InterruptedException e ) { throw new AssertionError ( "Unexpected error" , e ) ; } catch ( ExecutionException e ) { return e . getCause ( ) ; } }
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Get the error now when we know for sure that the future is failed .
| 120
| 15
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private CompletionStage < Void > prepareOnOtherNode ( Node node ) { LOG . trace ( "[{}] Repreparing on {}" , logPrefix , node ) ; DriverChannel channel = session . getChannel ( node , logPrefix ) ; if ( channel == null ) { LOG . trace ( "[{}] Could not get a channel to reprepare on {}, skipping" , logPrefix , node ) ; return CompletableFuture . completedFuture ( null ) ; } else { ThrottledAdminRequestHandler handler = new ThrottledAdminRequestHandler ( channel , message , request . getCustomPayload ( ) , timeout , throttler , session . getMetricUpdater ( ) , logPrefix , message . toString ( ) ) ; return handler . start ( ) . handle ( ( result , error ) -> { if ( error == null ) { LOG . trace ( "[{}] Successfully reprepared on {}" , logPrefix , node ) ; } else { Loggers . warnWithException ( LOG , "[{}] Error while repreparing on {}" , node , logPrefix , error ) ; } return null ; } ) ; } }
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blocking the preparation will be retried later on that node . Simply warn and move on .
| 253
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private static void insertJsonColumn ( CqlSession session ) { JsonObject alice = Json . createObjectBuilder ( ) . add ( "name" , "alice" ) . add ( "age" , 30 ) . build ( ) ; JsonObject bob = Json . createObjectBuilder ( ) . add ( "name" , "bob" ) . add ( "age" , 35 ) . build ( ) ; // Build and execute a simple statement Statement stmt = insertInto ( "examples" , "json_jsr353_column" ) . value ( "id" , literal ( 1 ) ) // the JSON object will be converted into a String and persisted into the VARCHAR column // "json" . value ( "json" , literal ( alice , session . getContext ( ) . getCodecRegistry ( ) ) ) . build ( ) ; session . execute ( stmt ) ; // The JSON object can be a bound value if the statement is prepared // (subsequent calls to the prepare() method will return cached statement) PreparedStatement pst = session . prepare ( insertInto ( "examples" , "json_jsr353_column" ) . value ( "id" , bindMarker ( "id" ) ) . value ( "json" , bindMarker ( "json" ) ) . build ( ) ) ; session . execute ( pst . bind ( ) . setInt ( "id" , 2 ) // note that the codec requires that the type passed to the set() method // be always JsonStructure, and not a subclass of it, such as JsonObject . set ( "json" , bob , JsonStructure . class ) ) ; }
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Mapping a JSON object to a table column
| 368
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public static void warnWithException ( Logger logger , String format , Object ... arguments ) { if ( logger . isDebugEnabled ( ) ) { logger . warn ( format , arguments ) ; } else { Object last = arguments [ arguments . length - 1 ] ; if ( last instanceof Throwable ) { Throwable t = ( Throwable ) last ; arguments [ arguments . length - 1 ] = t . getClass ( ) . getSimpleName ( ) + ": " + t . getMessage ( ) ; logger . warn ( format + " ({})" , arguments ) ; } else { // Should only be called with an exception as last argument, but handle gracefully anyway logger . warn ( format , arguments ) ; } } }
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Emits a warning log that includes an exception . If the current level is debug the full stack trace is included otherwise only the exception s message .
| 152
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158,563
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private void savePort ( DriverChannel channel ) { if ( port < 0 ) { SocketAddress address = channel . getEndPoint ( ) . resolve ( ) ; if ( address instanceof InetSocketAddress ) { port = ( ( InetSocketAddress ) address ) . getPort ( ) ; } } }
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We save it the first time we get a control connection channel .
| 64
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@ NonNull @ Override public Iterator < AdminRow > iterator ( ) { return new AbstractIterator < AdminRow > ( ) { @ Override protected AdminRow computeNext ( ) { List < ByteBuffer > rowData = data . poll ( ) ; return ( rowData == null ) ? endOfData ( ) : new AdminRow ( columnSpecs , rowData , protocolVersion ) ; } } ; }
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This consumes the result s data and can be called only once .
| 86
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158,565
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protected TypeCodec < ? > createCodec ( GenericType < ? > javaType , boolean isJavaCovariant ) { TypeToken < ? > token = javaType . __getToken ( ) ; if ( List . class . isAssignableFrom ( token . getRawType ( ) ) && token . getType ( ) instanceof ParameterizedType ) { Type [ ] typeArguments = ( ( ParameterizedType ) token . getType ( ) ) . getActualTypeArguments ( ) ; GenericType < ? > elementType = GenericType . of ( typeArguments [ 0 ] ) ; TypeCodec < ? > elementCodec = codecFor ( elementType , isJavaCovariant ) ; return TypeCodecs . listOf ( elementCodec ) ; } else if ( Set . class . isAssignableFrom ( token . getRawType ( ) ) && token . getType ( ) instanceof ParameterizedType ) { Type [ ] typeArguments = ( ( ParameterizedType ) token . getType ( ) ) . getActualTypeArguments ( ) ; GenericType < ? > elementType = GenericType . of ( typeArguments [ 0 ] ) ; TypeCodec < ? > elementCodec = codecFor ( elementType , isJavaCovariant ) ; return TypeCodecs . setOf ( elementCodec ) ; } else if ( Map . class . isAssignableFrom ( token . getRawType ( ) ) && token . getType ( ) instanceof ParameterizedType ) { Type [ ] typeArguments = ( ( ParameterizedType ) token . getType ( ) ) . getActualTypeArguments ( ) ; GenericType < ? > keyType = GenericType . of ( typeArguments [ 0 ] ) ; GenericType < ? > valueType = GenericType . of ( typeArguments [ 1 ] ) ; TypeCodec < ? > keyCodec = codecFor ( keyType , isJavaCovariant ) ; TypeCodec < ? > valueCodec = codecFor ( valueType , isJavaCovariant ) ; return TypeCodecs . mapOf ( keyCodec , valueCodec ) ; } throw new CodecNotFoundException ( null , javaType ) ; }
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Variant where the CQL type is unknown . Can be covariant if we come from a lookup by Java value .
| 487
| 24
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158,566
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protected TypeCodec < ? > createCodec ( DataType cqlType ) { if ( cqlType instanceof ListType ) { DataType elementType = ( ( ListType ) cqlType ) . getElementType ( ) ; TypeCodec < Object > elementCodec = codecFor ( elementType ) ; return TypeCodecs . listOf ( elementCodec ) ; } else if ( cqlType instanceof SetType ) { DataType elementType = ( ( SetType ) cqlType ) . getElementType ( ) ; TypeCodec < Object > elementCodec = codecFor ( elementType ) ; return TypeCodecs . setOf ( elementCodec ) ; } else if ( cqlType instanceof MapType ) { DataType keyType = ( ( MapType ) cqlType ) . getKeyType ( ) ; DataType valueType = ( ( MapType ) cqlType ) . getValueType ( ) ; TypeCodec < Object > keyCodec = codecFor ( keyType ) ; TypeCodec < Object > valueCodec = codecFor ( valueType ) ; return TypeCodecs . mapOf ( keyCodec , valueCodec ) ; } else if ( cqlType instanceof TupleType ) { return TypeCodecs . tupleOf ( ( TupleType ) cqlType ) ; } else if ( cqlType instanceof UserDefinedType ) { return TypeCodecs . udtOf ( ( UserDefinedType ) cqlType ) ; } else if ( cqlType instanceof CustomType ) { return TypeCodecs . custom ( cqlType ) ; } throw new CodecNotFoundException ( cqlType , null ) ; }
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Variant where the Java type is unknown .
| 364
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158,567
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private static < DeclaredT , RuntimeT > TypeCodec < DeclaredT > uncheckedCast ( TypeCodec < RuntimeT > codec ) { @ SuppressWarnings ( "unchecked" ) TypeCodec < DeclaredT > result = ( TypeCodec < DeclaredT > ) codec ; return result ; }
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We call this after validating the types so we know the cast will never fail .
| 69
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158,568
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protected long computeNext ( long last ) { long currentTick = clock . currentTimeMicros ( ) ; if ( last >= currentTick ) { maybeLog ( currentTick , last ) ; return last + 1 ; } return currentTick ; }
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Compute the next timestamp given the current clock tick and the last timestamp returned .
| 54
| 16
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158,569
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public static int skipSpaces ( String toParse , int idx ) { while ( isBlank ( toParse . charAt ( idx ) ) && idx < toParse . length ( ) ) ++ idx ; return idx ; }
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Returns the index of the first character in toParse from idx that is not a space .
| 55
| 20
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public static int skipCQLValue ( String toParse , int idx ) { if ( idx >= toParse . length ( ) ) throw new IllegalArgumentException ( ) ; if ( isBlank ( toParse . charAt ( idx ) ) ) throw new IllegalArgumentException ( ) ; int cbrackets = 0 ; int sbrackets = 0 ; int parens = 0 ; boolean inString = false ; do { char c = toParse . charAt ( idx ) ; if ( inString ) { if ( c == ' ' ) { if ( idx + 1 < toParse . length ( ) && toParse . charAt ( idx + 1 ) == ' ' ) { ++ idx ; // this is an escaped quote, skip it } else { inString = false ; if ( cbrackets == 0 && sbrackets == 0 && parens == 0 ) return idx + 1 ; } } // Skip any other character } else if ( c == ' ' ) { inString = true ; } else if ( c == ' ' ) { ++ cbrackets ; } else if ( c == ' ' ) { ++ sbrackets ; } else if ( c == ' ' ) { ++ parens ; } else if ( c == ' ' ) { if ( cbrackets == 0 ) return idx ; -- cbrackets ; if ( cbrackets == 0 && sbrackets == 0 && parens == 0 ) return idx + 1 ; } else if ( c == ' ' ) { if ( sbrackets == 0 ) return idx ; -- sbrackets ; if ( cbrackets == 0 && sbrackets == 0 && parens == 0 ) return idx + 1 ; } else if ( c == ' ' ) { if ( parens == 0 ) return idx ; -- parens ; if ( cbrackets == 0 && sbrackets == 0 && parens == 0 ) return idx + 1 ; } else if ( isBlank ( c ) || ! isCqlIdentifierChar ( c ) ) { if ( cbrackets == 0 && sbrackets == 0 && parens == 0 ) return idx ; } } while ( ++ idx < toParse . length ( ) ) ; if ( inString || cbrackets != 0 || sbrackets != 0 || parens != 0 ) throw new IllegalArgumentException ( ) ; return idx ; }
|
Assuming that idx points to the beginning of a CQL value in toParse returns the index of the first character after this value .
| 530
| 28
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158,571
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public static int skipCQLId ( String toParse , int idx ) { if ( idx >= toParse . length ( ) ) throw new IllegalArgumentException ( ) ; char c = toParse . charAt ( idx ) ; if ( isCqlIdentifierChar ( c ) ) { while ( idx < toParse . length ( ) && isCqlIdentifierChar ( toParse . charAt ( idx ) ) ) idx ++ ; return idx ; } if ( c != ' ' ) throw new IllegalArgumentException ( ) ; while ( ++ idx < toParse . length ( ) ) { c = toParse . charAt ( idx ) ; if ( c != ' ' ) continue ; if ( idx + 1 < toParse . length ( ) && toParse . charAt ( idx + 1 ) == ' ' ) ++ idx ; // this is an escaped double quote, skip it else return idx + 1 ; } throw new IllegalArgumentException ( ) ; }
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Assuming that idx points to the beginning of a CQL identifier in toParse returns the index of the first character after this identifier .
| 224
| 28
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158,572
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public < EventT > Object register ( Class < EventT > eventClass , Consumer < EventT > listener ) { LOG . debug ( "[{}] Registering {} for {}" , logPrefix , listener , eventClass ) ; listeners . put ( eventClass , listener ) ; // The reason for the key mechanism is that this will often be used with method references, // and you get a different object every time you reference a method, so register(Foo::bar) // followed by unregister(Foo::bar) wouldn't work as expected. return listener ; }
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Registers a listener for an event type .
| 120
| 9
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158,573
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public < EventT > boolean unregister ( Object key , Class < EventT > eventClass ) { LOG . debug ( "[{}] Unregistering {} for {}" , logPrefix , key , eventClass ) ; return listeners . remove ( eventClass , key ) ; }
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Unregisters a listener .
| 59
| 6
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158,574
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public void fire ( Object event ) { LOG . debug ( "[{}] Firing an instance of {}: {}" , logPrefix , event . getClass ( ) , event ) ; // if the exact match thing gets too cumbersome, we can reconsider, but I'd like to avoid // scanning all the keys with instanceof checks. Class < ? > eventClass = event . getClass ( ) ; for ( Consumer < ? > l : listeners . get ( eventClass ) ) { @ SuppressWarnings ( "unchecked" ) Consumer < Object > listener = ( Consumer < Object > ) l ; LOG . debug ( "[{}] Notifying {} of {}" , logPrefix , listener , event ) ; listener . accept ( event ) ; } }
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Sends an event that will notify any registered listener for that class .
| 160
| 14
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158,575
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public static boolean needsDoubleQuotes ( String s ) { // this method should only be called for C*-provided identifiers, // so we expect it to be non-null and non-empty. assert s != null && ! s . isEmpty ( ) ; char c = s . charAt ( 0 ) ; if ( ! ( c >= 97 && c <= 122 ) ) // a-z return true ; for ( int i = 1 ; i < s . length ( ) ; i ++ ) { c = s . charAt ( i ) ; if ( ! ( ( c >= 48 && c <= 57 ) // 0-9 || ( c == 95 ) // _ || ( c >= 97 && c <= 122 ) // a-z ) ) { return true ; } } return isReservedCqlKeyword ( s ) ; }
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Whether a string needs double quotes to be a valid CQL identifier .
| 173
| 14
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public static boolean isLongLiteral ( String str ) { if ( str == null || str . isEmpty ( ) ) return false ; char [ ] chars = str . toCharArray ( ) ; for ( int i = 0 ; i < chars . length ; i ++ ) { char c = chars [ i ] ; if ( ( c < ' ' && ( i != 0 || c != ' ' ) ) || c > ' ' ) return false ; } return true ; }
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Check whether the given string corresponds to a valid CQL long literal . Long literals are composed solely by digits but can have an optional leading minus sign .
| 100
| 31
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158,577
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@ NonNull public String asCql ( boolean pretty ) { if ( pretty ) { return Strings . needsDoubleQuotes ( internal ) ? Strings . doubleQuote ( internal ) : internal ; } else { return Strings . doubleQuote ( internal ) ; } }
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Returns the identifier in a format appropriate for concatenation in a CQL query .
| 55
| 17
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158,578
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public Map < String , String > build ( ) { NullAllowingImmutableMap . Builder < String , String > builder = NullAllowingImmutableMap . builder ( 3 ) ; // add compression (if configured) and driver name and version String compressionAlgorithm = context . getCompressor ( ) . algorithm ( ) ; if ( compressionAlgorithm != null && ! compressionAlgorithm . trim ( ) . isEmpty ( ) ) { builder . put ( Startup . COMPRESSION_KEY , compressionAlgorithm . trim ( ) ) ; } return builder . put ( DRIVER_NAME_KEY , getDriverName ( ) ) . put ( DRIVER_VERSION_KEY , getDriverVersion ( ) ) . build ( ) ; }
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Builds a map of options to send in a Startup message .
| 152
| 13
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158,579
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private void connect ( ) { session = CqlSession . builder ( ) . build ( ) ; System . out . printf ( "Connected to session: %s%n" , session . getName ( ) ) ; }
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Initiates a connection to the session specified by the application . conf .
| 47
| 15
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158,580
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private ResultSet read ( ConsistencyLevel cl , int retryCount ) { System . out . printf ( "Reading at %s (retry count: %d)%n" , cl , retryCount ) ; Statement stmt = SimpleStatement . newInstance ( "SELECT sensor_id, date, timestamp, value " + "FROM downgrading.sensor_data " + "WHERE " + "sensor_id = 756716f7-2e54-4715-9f00-91dcbea6cf50 AND " + "date = '2018-02-26' AND " + "timestamp > '2018-02-26+01:00'" ) . setConsistencyLevel ( cl ) ; try { ResultSet rows = session . execute ( stmt ) ; System . out . println ( "Read succeeded at " + cl ) ; return rows ; } catch ( DriverException e ) { if ( retryCount == maxRetries ) { throw e ; } e = unwrapAllNodesFailedException ( e ) ; System . out . println ( "Read failed: " + e ) ; // General intent: downgrade and retry at the highest consistency level // that is likely to succeed. if ( e instanceof UnavailableException ) { // Downgrade to the number of replicas reported alive and retry. int aliveReplicas = ( ( UnavailableException ) e ) . getAlive ( ) ; ConsistencyLevel downgraded = downgrade ( cl , aliveReplicas , e ) ; return read ( downgraded , retryCount + 1 ) ; } else if ( e instanceof ReadTimeoutException ) { ReadTimeoutException readTimeout = ( ReadTimeoutException ) e ; int received = readTimeout . getReceived ( ) ; int required = readTimeout . getBlockFor ( ) ; // If fewer replicas responded than required by the consistency level // (but at least one replica did respond), retry with a consistency level // equal to the number of received acknowledgements. if ( received < required ) { ConsistencyLevel downgraded = downgrade ( cl , received , e ) ; return read ( downgraded , retryCount + 1 ) ; } // If we received enough replies to meet the consistency level, // but the actual data was not present among the received responses, // then retry with the initial consistency level, we might be luckier next time // and get the data back. if ( ! readTimeout . wasDataPresent ( ) ) { return read ( cl , retryCount + 1 ) ; } // Otherwise, abort since the read timeout is unlikely to be solved by a retry. throw e ; } else { // Unexpected error: just retry with same consistency level // and hope to talk to a healthier coordinator. return read ( cl , retryCount + 1 ) ; } } }
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Queries data retrying if necessary with a downgraded CL .
| 598
| 13
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158,581
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private void display ( ResultSet rows ) { final int width1 = 38 ; final int width2 = 12 ; final int width3 = 30 ; final int width4 = 21 ; String format = "%-" + width1 + "s%-" + width2 + "s%-" + width3 + "s%-" + width4 + "s%n" ; // headings System . out . printf ( format , "sensor_id" , "date" , "timestamp" , "value" ) ; // separators drawLine ( width1 , width2 , width3 , width4 ) ; // data for ( Row row : rows ) { System . out . printf ( format , row . getUuid ( "sensor_id" ) , row . getLocalDate ( "date" ) , row . getInstant ( "timestamp" ) , row . getDouble ( "value" ) ) ; } }
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Displays the results on the console .
| 194
| 8
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158,582
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private static ConsistencyLevel downgrade ( ConsistencyLevel current , int acknowledgements , DriverException original ) { if ( acknowledgements >= 3 ) { return DefaultConsistencyLevel . THREE ; } if ( acknowledgements == 2 ) { return DefaultConsistencyLevel . TWO ; } if ( acknowledgements == 1 ) { return DefaultConsistencyLevel . ONE ; } // Edge case: EACH_QUORUM does not report a global number of alive replicas // so even if we get 0 alive replicas, there might be // a node up in some other datacenter, so retry at ONE. if ( current == DefaultConsistencyLevel . EACH_QUORUM ) { return DefaultConsistencyLevel . ONE ; } throw original ; }
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Downgrades the current consistency level to the highest level that is likely to succeed given the number of acknowledgements received . Rethrows the original exception if the current consistency level cannot be downgraded any further .
| 160
| 41
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158,583
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private static void drawLine ( int ... widths ) { for ( int width : widths ) { for ( int i = 1 ; i < width ; i ++ ) { System . out . print ( ' ' ) ; } System . out . print ( ' ' ) ; } System . out . println ( ) ; }
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Draws a line to isolate headings from rows .
| 67
| 11
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158,584
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public void querySchema ( ) { ResultSet results = session . execute ( "SELECT * FROM simplex.playlists " + "WHERE id = 2cc9ccb7-6221-4ccb-8387-f22b6a1b354d;" ) ; System . out . printf ( "%-30s\t%-20s\t%-20s%n" , "title" , "album" , "artist" ) ; System . out . println ( "-------------------------------+-----------------------+--------------------" ) ; for ( Row row : results ) { System . out . printf ( "%-30s\t%-20s\t%-20s%n" , row . getString ( "title" ) , row . getString ( "album" ) , row . getString ( "artist" ) ) ; } }
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Queries and displays data .
| 179
| 6
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158,585
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public static Class < ? > loadClass ( ClassLoader classLoader , String className ) { try { // If input classLoader is null, use current thread's ClassLoader, if that is null, use // default (calling class') ClassLoader. ClassLoader cl = classLoader != null ? classLoader : Thread . currentThread ( ) . getContextClassLoader ( ) ; if ( cl != null ) { return Class . forName ( className , true , cl ) ; } else { return Class . forName ( className ) ; } } catch ( ClassNotFoundException e ) { return null ; } }
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Loads a class by name .
| 127
| 7
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158,586
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public static < ComponentT > Optional < ComponentT > buildFromConfig ( InternalDriverContext context , DriverOption classNameOption , Class < ComponentT > expectedSuperType , String ... defaultPackages ) { return buildFromConfig ( context , null , classNameOption , expectedSuperType , defaultPackages ) ; }
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Tries to create an instance of a class given an option defined in the driver configuration .
| 65
| 18
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158,587
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public static < ComponentT > Map < String , ComponentT > buildFromConfigProfiles ( InternalDriverContext context , DriverOption rootOption , Class < ComponentT > expectedSuperType , String ... defaultPackages ) { // Find out how many distinct configurations we have ListMultimap < Object , String > profilesByConfig = MultimapBuilder . hashKeys ( ) . arrayListValues ( ) . build ( ) ; for ( DriverExecutionProfile profile : context . getConfig ( ) . getProfiles ( ) . values ( ) ) { profilesByConfig . put ( profile . getComparisonKey ( rootOption ) , profile . getName ( ) ) ; } // Instantiate each distinct configuration, and associate it with the corresponding profiles ImmutableMap . Builder < String , ComponentT > result = ImmutableMap . builder ( ) ; for ( Collection < String > profiles : profilesByConfig . asMap ( ) . values ( ) ) { // Since all profiles use the same config, we can use any of them String profileName = profiles . iterator ( ) . next ( ) ; ComponentT policy = buildFromConfig ( context , profileName , classOption ( rootOption ) , expectedSuperType , defaultPackages ) . orElseThrow ( ( ) -> new IllegalArgumentException ( String . format ( "Missing configuration for %s in profile %s" , rootOption . getPath ( ) , profileName ) ) ) ; for ( String profile : profiles ) { result . put ( profile , policy ) ; } } return result . build ( ) ; }
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Tries to create multiple instances of a class given options defined in the driver configuration and possibly overridden in profiles .
| 324
| 23
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public Map < CqlIdentifier , UserDefinedType > parse ( Collection < AdminRow > typeRows , CqlIdentifier keyspaceId ) { if ( typeRows . isEmpty ( ) ) { return Collections . emptyMap ( ) ; } else { Map < CqlIdentifier , UserDefinedType > types = new LinkedHashMap <> ( ) ; for ( AdminRow row : topologicalSort ( typeRows , keyspaceId ) ) { UserDefinedType type = parseType ( row , keyspaceId , types ) ; types . put ( type . getName ( ) , type ) ; } return ImmutableMap . copyOf ( types ) ; } }
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Contrary to other element parsers this one processes all the types of a keyspace in one go . UDTs can depend on each other but the system table returns them in alphabetical order . In order to properly build the definitions we need to do a topological sort of the rows first so that each type is parsed after its dependencies .
| 146
| 69
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158,589
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public CompletionStage < Void > init ( boolean listenToClusterEvents , boolean reconnectOnFailure , boolean useInitialReconnectionSchedule ) { RunOrSchedule . on ( adminExecutor , ( ) -> singleThreaded . init ( listenToClusterEvents , reconnectOnFailure , useInitialReconnectionSchedule ) ) ; return singleThreaded . initFuture ; }
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Initializes the control connection . If it is already initialized this is a no - op and all parameters are ignored .
| 82
| 23
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158,590
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public CompletionStage < Void > setKeyspace ( CqlIdentifier newKeyspaceName ) { return RunOrSchedule . on ( adminExecutor , ( ) -> singleThreaded . setKeyspace ( newKeyspaceName ) ) ; }
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Changes the keyspace name on all the channels in this pool .
| 52
| 13
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158,591
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public List < String > getPreReleaseLabels ( ) { return preReleases == null ? null : Collections . unmodifiableList ( Arrays . asList ( preReleases ) ) ; }
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The pre - release labels if relevant i . e . label1 and label2 in X . Y . Z - label1 - lable2 .
| 42
| 30
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158,592
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private void processNodeStateEvent ( NodeStateEvent event ) { switch ( stateRef . get ( ) ) { case BEFORE_INIT : case DURING_INIT : throw new AssertionError ( "Filter should not be marked ready until LBP init" ) ; case CLOSING : return ; // ignore case RUNNING : for ( LoadBalancingPolicy policy : policies ) { if ( event . newState == NodeState . UP ) { policy . onUp ( event . node ) ; } else if ( event . newState == NodeState . DOWN || event . newState == NodeState . FORCED_DOWN ) { policy . onDown ( event . node ) ; } else if ( event . newState == NodeState . UNKNOWN ) { policy . onAdd ( event . node ) ; } else if ( event . newState == null ) { policy . onRemove ( event . node ) ; } else { LOG . warn ( "[{}] Unsupported event: {}" , logPrefix , event ) ; } } break ; } }
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once it has gone through the filter
| 223
| 7
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158,593
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@ VisibleForTesting static String reverse ( InetAddress address ) { byte [ ] bytes = address . getAddress ( ) ; if ( bytes . length == 4 ) return reverseIpv4 ( bytes ) ; else return reverseIpv6 ( bytes ) ; }
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Builds the reversed domain name in the ARPA domain to perform the reverse lookup
| 57
| 16
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158,594
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public int firstIndexOf ( CqlIdentifier id ) { Integer index = byId . get ( id ) ; return ( index == null ) ? - 1 : index ; }
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Returns the first occurrence of a given identifier or - 1 if it s not in the list .
| 37
| 19
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158,595
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private static void insertWithCoreApi ( CqlSession session ) { // Bind in a simple statement: session . execute ( SimpleStatement . newInstance ( "INSERT INTO examples.querybuilder_json JSON ?" , "{ \"id\": 1, \"name\": \"Mouse\", \"specs\": { \"color\": \"silver\" } }" ) ) ; // Bind in a prepared statement: // (subsequent calls to the prepare() method will return cached statement) PreparedStatement pst = session . prepare ( "INSERT INTO examples.querybuilder_json JSON :payload" ) ; session . execute ( pst . bind ( ) . setString ( "payload" , "{ \"id\": 2, \"name\": \"Keyboard\", \"specs\": { \"layout\": \"qwerty\" } }" ) ) ; // fromJson lets you provide individual columns as JSON: session . execute ( SimpleStatement . newInstance ( "INSERT INTO examples.querybuilder_json " + "(id, name, specs) VALUES (?, ?, fromJson(?))" , 3 , "Screen" , "{ \"size\": \"24-inch\" }" ) ) ; }
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Demonstrates data insertion with the core API i . e . providing the full query strings .
| 250
| 19
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158,596
|
private static void selectWithCoreApi ( CqlSession session ) { // Reading the whole row as a JSON object: Row row = session . execute ( SimpleStatement . newInstance ( "SELECT JSON * FROM examples.querybuilder_json WHERE id = ?" , 1 ) ) . one ( ) ; assert row != null ; System . out . printf ( "Entry #1 as JSON: %s%n" , row . getString ( "[json]" ) ) ; // Extracting a particular column as JSON: row = session . execute ( SimpleStatement . newInstance ( "SELECT id, toJson(specs) AS json_specs FROM examples.querybuilder_json WHERE id = ?" , 2 ) ) . one ( ) ; assert row != null ; System . out . printf ( "Entry #%d's specs as JSON: %s%n" , row . getInt ( "id" ) , row . getString ( "json_specs" ) ) ; }
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Demonstrates data retrieval with the core API i . e . providing the full query strings .
| 208
| 19
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158,597
|
public UserDefinedTypeBuilder withField ( CqlIdentifier name , DataType type ) { fieldNames . add ( name ) ; fieldTypes . add ( type ) ; return this ; }
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Adds a new field . The fields in the resulting type will be in the order of the calls to this method .
| 40
| 23
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158,598
|
public DefaultMetadata withNodes ( Map < UUID , Node > newNodes , boolean tokenMapEnabled , boolean tokensChanged , TokenFactory tokenFactory , InternalDriverContext context ) { // Force a rebuild if at least one node has different tokens, or there are new or removed nodes. boolean forceFullRebuild = tokensChanged || ! newNodes . equals ( nodes ) ; return new DefaultMetadata ( ImmutableMap . copyOf ( newNodes ) , this . keyspaces , rebuildTokenMap ( newNodes , keyspaces , tokenMapEnabled , forceFullRebuild , tokenFactory , context ) ) ; }
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Refreshes the current metadata with the given list of nodes .
| 130
| 13
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158,599
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private void sendRequest ( Node retriedNode , Queue < Node > queryPlan , int currentExecutionIndex , int retryCount , boolean scheduleNextExecution ) { if ( result . isDone ( ) ) { return ; } Node node = retriedNode ; DriverChannel channel = null ; if ( node == null || ( channel = session . getChannel ( node , logPrefix ) ) == null ) { while ( ! result . isDone ( ) && ( node = queryPlan . poll ( ) ) != null ) { channel = session . getChannel ( node , logPrefix ) ; if ( channel != null ) { break ; } } } if ( channel == null ) { // We've reached the end of the query plan without finding any node to write to if ( ! result . isDone ( ) && activeExecutionsCount . decrementAndGet ( ) == 0 ) { // We're the last execution so fail the result setFinalError ( AllNodesFailedException . fromErrors ( this . errors ) , null , - 1 ) ; } } else { NodeResponseCallback nodeResponseCallback = new NodeResponseCallback ( node , queryPlan , channel , currentExecutionIndex , retryCount , scheduleNextExecution , logPrefix ) ; channel . write ( message , statement . isTracing ( ) , statement . getCustomPayload ( ) , nodeResponseCallback ) . addListener ( nodeResponseCallback ) ; } }
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Sends the request to the next available node .
| 302
| 10
|
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