idx int64 0 41.2k | question stringlengths 74 4.21k | target stringlengths 5 888 |
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21,200 | static Method getMethod ( Class < ? > cls , String name ) throws NoSuchMethodException { NoSuchMethodException firstExc = null ; for ( Class < ? > c = cls ; c != null ; c = c . getSuperclass ( ) ) { try { return c . getDeclaredMethod ( name ) ; } catch ( NoSuchMethodException e ) { if ( firstExc == null ) { firstExc = ... | Search for a method in the class and all superclasses . |
21,201 | static Method getGaugeMethod ( Registry registry , Id id , Object obj , String method ) { try { final Method m = Utils . getMethod ( obj . getClass ( ) , method ) ; try { final Number n = ( Number ) m . invoke ( obj ) ; REGISTRY_LOGGER . debug ( "registering gauge {}, using method [{}], with initial value {}" , id , m ... | Return a method supplying a value for a gauge . |
21,202 | public static Id normalize ( Id id ) { return ( new DefaultId ( id . name ( ) ) ) . withTags ( id . tags ( ) ) . normalize ( ) ; } | Returns a new id with the tag list sorted by key and with no duplicate keys . |
21,203 | public static Measurement first ( Iterable < Measurement > ms , Predicate < Measurement > p ) { Iterator < Measurement > it = filter ( ms , p ) . iterator ( ) ; return it . hasNext ( ) ? it . next ( ) : null ; } | Returns the first measurement that matches the predicate . |
21,204 | public static < T > List < T > toList ( Iterable < T > iter ) { List < T > buf = new ArrayList < > ( ) ; for ( T v : iter ) { buf . add ( v ) ; } return buf ; } | Returns a list with a copy of the data from the iterable . |
21,205 | public static < T > List < T > toList ( Iterator < T > iter ) { List < T > buf = new ArrayList < > ( ) ; while ( iter . hasNext ( ) ) { buf . add ( iter . next ( ) ) ; } return buf ; } | Returns a list with the data from the iterator . |
21,206 | @ SuppressWarnings ( "PMD.UnusedLocalVariable" ) public static < T > int size ( Iterable < T > iter ) { if ( iter instanceof ArrayTagSet ) { return ( ( ArrayTagSet ) iter ) . size ( ) ; } else if ( iter instanceof Collection < ? > ) { return ( ( Collection < ? > ) iter ) . size ( ) ; } else { int size = 0 ; for ( T v :... | Returns the size of an iterable . This method should only be used with fixed size collections . It will attempt to find an efficient method to get the size before falling back to a traversal of the iterable . |
21,207 | static Iterable < Tag > toIterable ( String [ ] tags ) { if ( tags . length % 2 == 1 ) { throw new IllegalArgumentException ( "size must be even, it is a set of key=value pairs" ) ; } ArrayList < Tag > ts = new ArrayList < > ( tags . length / 2 ) ; for ( int i = 0 ; i < tags . length ; i += 2 ) { ts . add ( new BasicTa... | Returns an iterable of tags based on a string array . |
21,208 | public static void propagateTypeError ( Registry registry , Id id , Class < ? > desiredClass , Class < ? > actualClass ) { final String dType = desiredClass . getName ( ) ; final String aType = actualClass . getName ( ) ; final String msg = String . format ( "cannot access '%s' as a %s, it already exists as a %s" , id ... | Propagate a type error exception . Used in situations where an existing id has already been registered but with a different class . |
21,209 | public static void addToRootLogger ( Registry registry , String name , boolean ignoreExceptions ) { final Appender appender = new SpectatorAppender ( registry , name , null , null , ignoreExceptions ) ; appender . start ( ) ; LoggerContext context = ( LoggerContext ) LogManager . getContext ( false ) ; Configuration co... | Add the spectator appender to the root logger . This method is intended to be called once as part of the applications initialization process . |
21,210 | public static SpectatorAppender createAppender ( @ PluginAttribute ( "name" ) String name , @ PluginAttribute ( "ignoreExceptions" ) boolean ignoreExceptions , @ PluginElement ( "Layout" ) Layout < ? extends Serializable > layout , @ PluginElement ( "Filters" ) Filter filter ) { if ( name == null ) { LOGGER . error ( "... | Create a new instance of the appender using the global spectator registry . |
21,211 | public static LongTaskTimer get ( Registry registry , Id id ) { ConcurrentMap < Id , Object > state = registry . state ( ) ; Object obj = Utils . computeIfAbsent ( state , id , i -> { LongTaskTimer timer = new LongTaskTimer ( registry , id ) ; PolledMeter . using ( registry ) . withId ( id ) . withTag ( Statistic . act... | Creates a timer for tracking long running tasks . |
21,212 | void refresh ( ) { try { HttpResponse res = client . get ( uri ) . withConnectTimeout ( connectTimeout ) . withReadTimeout ( readTimeout ) . addHeader ( "If-None-Match" , etag ) . send ( ) . decompress ( ) ; if ( res . status ( ) == 304 ) { LOGGER . debug ( "no modification to subscriptions" ) ; } else if ( res . statu... | Refresh the subscriptions from the server . |
21,213 | @ SuppressWarnings ( "PMD.AvoidCatchingThrowable" ) static String mkString ( Object obj ) { if ( obj == null ) { return "null" ; } try { return obj . toString ( ) + " (type is " + obj . getClass ( ) + ")" ; } catch ( Throwable t ) { return t . getClass ( ) . toString ( ) + ": " + t . getMessage ( ) + " (type is " + obj... | Convert object to string and checking if it fails . |
21,214 | static GcType getGcType ( String name ) { GcType t = KNOWN_COLLECTOR_NAMES . get ( name ) ; return ( t == null ) ? GcType . UNKNOWN : t ; } | Determine the type old or young based on the name of the collector . |
21,215 | static long getTotalUsage ( Map < String , MemoryUsage > usages ) { long sum = 0L ; for ( Map . Entry < String , MemoryUsage > e : usages . entrySet ( ) ) { sum += e . getValue ( ) . getUsed ( ) ; } return sum ; } | Compute the total usage across all pools . |
21,216 | static long getTotalMaxUsage ( Map < String , MemoryUsage > usages ) { long sum = 0L ; for ( Map . Entry < String , MemoryUsage > e : usages . entrySet ( ) ) { long max = e . getValue ( ) . getMax ( ) ; if ( max > 0 ) { sum += e . getValue ( ) . getMax ( ) ; } } return sum ; } | Compute the max usage across all pools . |
21,217 | static long getPromotionSize ( GcInfo info ) { long totalBefore = getTotalUsage ( info . getMemoryUsageBeforeGc ( ) ) ; long totalAfter = getTotalUsage ( info . getMemoryUsageAfterGc ( ) ) ; return totalAfter - totalBefore ; } | Compute the amount of data promoted during a GC event . |
21,218 | void addAndGet ( long amount ) { for ( int i = 0 ; i < ServoPollers . NUM_POLLERS ; ++ i ) { getCurrent ( i ) . addAndGet ( amount ) ; } } | Add to the current bucket . |
21,219 | AtomicLong getCurrent ( int pollerIndex ) { rollCount ( pollerIndex , clock . now ( ) ) ; return data [ 2 * pollerIndex + CURRENT ] ; } | Get the AtomicLong for the current bucket . |
21,220 | Long poll ( int pollerIndex ) { final long now = clock . now ( ) ; final long step = ServoPollers . POLLING_INTERVALS [ pollerIndex ] ; rollCount ( pollerIndex , now ) ; final int prevPos = 2 * pollerIndex + PREVIOUS ; final long value = data [ prevPos ] . get ( ) ; final long last = lastPollTime [ pollerIndex ] . getA... | Get the value for the last completed interval . |
21,221 | static String substitute ( String pattern , Map < String , String > vars ) { String value = pattern ; for ( Map . Entry < String , String > entry : vars . entrySet ( ) ) { String raw = entry . getValue ( ) ; String v = Introspector . decapitalize ( raw ) ; value = value . replace ( "{raw:" + entry . getKey ( ) + "}" , ... | Substitute named variables in the pattern string with the corresponding values in the variables map . |
21,222 | @ SuppressWarnings ( "PMD" ) static Double eval ( String expr , Map < String , ? extends Number > vars ) { Deque < Double > stack = new ArrayDeque < > ( ) ; String [ ] parts = expr . split ( "[,\\s]+" ) ; for ( String part : parts ) { switch ( part ) { case ":add" : binaryOp ( stack , ( a , b ) -> a + b ) ; break ; cas... | Evaluate a simple stack expression for the value . |
21,223 | public void stop ( ) { if ( scheduler != null ) { scheduler . shutdown ( ) ; scheduler = null ; logger . info ( "flushing metrics before stopping the registry" ) ; collectData ( ) ; logger . info ( "stopped collecting metrics every {} reporting to {}" , frequency , uri ) ; } else { logger . warn ( "registry stopped, bu... | Stop the scheduler reporting data . |
21,224 | MonitorConfig toMonitorConfig ( Id id , Tag stat ) { MonitorConfig . Builder builder = new MonitorConfig . Builder ( id . name ( ) ) ; if ( stat != null ) { builder . withTag ( stat . key ( ) , stat . value ( ) ) ; } for ( Tag t : id . tags ( ) ) { builder . withTag ( t . key ( ) , t . value ( ) ) ; } return builder . ... | Converts a spectator id into a MonitorConfig that can be used by servo . |
21,225 | public static void logClientRequest ( Logger logger , HttpLogEntry entry ) { log ( logger , CLIENT , entry ) ; } | Log a client request . |
21,226 | public static void logServerRequest ( Logger logger , HttpLogEntry entry ) { log ( logger , SERVER , entry ) ; } | Log a request received by a server . |
21,227 | public HttpLogEntry withRequestUri ( String uri , String path ) { this . requestUri = uri ; this . path = path ; return this ; } | Set the URI for the actual http request . |
21,228 | public HttpLogEntry withRequestHeader ( String name , String value ) { requestHeaders . add ( new Header ( name , value ) ) ; return this ; } | Add a header that was on the request . |
21,229 | public HttpLogEntry withResponseHeader ( String name , String value ) { responseHeaders . add ( new Header ( name , value ) ) ; return this ; } | Add a header that was on the response . |
21,230 | public long getLatency ( ) { if ( latency >= 0L ) { return latency ; } else if ( events . size ( ) >= 2 ) { return events . get ( events . size ( ) - 1 ) . timestamp ( ) - events . get ( 0 ) . timestamp ( ) ; } else { return - 1 ; } } | Return the latency for the request . If not explicitly set it will be calculated from the events . |
21,231 | public long getOverallLatency ( ) { if ( maxAttempts <= 1 || originalStart < 0 ) { return getLatency ( ) ; } else if ( events . isEmpty ( ) ) { return - 1 ; } else { return events . get ( events . size ( ) - 1 ) . timestamp ( ) - originalStart ; } } | Return the overall latency for a group of requests including all retries . |
21,232 | public String getStartTime ( ) { return events . isEmpty ( ) ? "unknown" : isoDate . format ( new Date ( events . get ( 0 ) . timestamp ( ) ) ) ; } | Return the starting time for the request . |
21,233 | public String getTimeline ( ) { StringBuilder builder = new StringBuilder ( ) ; for ( Event event : events ) { builder . append ( event . name ( ) ) . append ( ":" ) . append ( event . timestamp ( ) ) . append ( ";" ) ; } return builder . toString ( ) ; } | Return a time line based on marked events . |
21,234 | public HttpRequestBuilder addHeader ( String name , String value ) { reqHeaders . put ( name , value ) ; entry . withRequestHeader ( name , value ) ; return this ; } | Add a header to the request . Note the content type will be set automatically when providing the content payload and should not be set here . |
21,235 | public HttpRequestBuilder withContent ( String type , String content ) { return withContent ( type , content . getBytes ( StandardCharsets . UTF_8 ) ) ; } | Set the request body . |
21,236 | public HttpRequestBuilder compress ( int level ) throws IOException { addHeader ( "Content-Encoding" , "gzip" ) ; entity = HttpUtils . gzip ( entity , level ) ; return this ; } | Compress the request body using the specified compression level . The content must have already been set on the builder . |
21,237 | public HttpRequestBuilder withRetries ( int n ) { Preconditions . checkArg ( n >= 0 , "number of retries must be >= 0" ) ; this . numAttempts = n + 1 ; entry . withMaxAttempts ( numAttempts ) ; return this ; } | How many times to retry if the intial attempt fails? |
21,238 | public static long [ ] asArray ( ) { long [ ] values = new long [ BUCKET_VALUES . length ] ; System . arraycopy ( BUCKET_VALUES , 0 , values , 0 , BUCKET_VALUES . length ) ; return values ; } | Returns a copy of the bucket values array . |
21,239 | public static < T > T [ ] map ( Class < T > c , Function < Long , T > f ) { @ SuppressWarnings ( "unchecked" ) T [ ] values = ( T [ ] ) Array . newInstance ( c , BUCKET_VALUES . length ) ; for ( int i = 0 ; i < BUCKET_VALUES . length ; ++ i ) { values [ i ] = f . apply ( BUCKET_VALUES [ i ] ) ; } return values ; } | Map the bucket values to a new array of a different type . |
21,240 | public static void percentiles ( long [ ] counts , double [ ] pcts , double [ ] results ) { Preconditions . checkArg ( counts . length == BUCKET_VALUES . length , "counts is not the same size as buckets array" ) ; Preconditions . checkArg ( pcts . length > 0 , "pct array cannot be empty" ) ; Preconditions . checkArg ( ... | Compute a set of percentiles based on the counts for the buckets . |
21,241 | public static double percentile ( long [ ] counts , double p ) { double [ ] pcts = new double [ ] { p } ; double [ ] results = new double [ 1 ] ; percentiles ( counts , pcts , results ) ; return results [ 0 ] ; } | Compute a percentile based on the counts for the buckets . |
21,242 | long getInitialDelay ( long stepSize ) { long now = clock ( ) . wallTime ( ) ; long stepBoundary = now / stepSize * stepSize ; long offset = stepSize / 10 ; long delay = now - stepBoundary ; if ( delay < offset ) { return delay + offset ; } else if ( delay > stepSize - offset ) { return stepSize - offset ; } else { ret... | Avoid collecting right on boundaries to minimize transitions on step longs during a collection . Randomly distribute across the middle of the step interval . |
21,243 | public void stop ( ) { if ( scheduler != null ) { scheduler . shutdown ( ) ; scheduler = null ; logger . info ( "stopped collecting metrics every {}ms reporting to {}" , step , uri ) ; } else { logger . warn ( "registry stopped, but was never started" ) ; } } | Stop the scheduler reporting Atlas data . |
21,244 | void collectData ( ) { if ( config . lwcEnabled ( ) ) { try { handleSubscriptions ( ) ; } catch ( Exception e ) { logger . warn ( "failed to handle subscriptions" , e ) ; } } else { logger . debug ( "lwc is disabled, skipping subscriptions" ) ; } if ( config . enabled ( ) ) { try { for ( List < Measurement > batch : ge... | Collect data and send to Atlas . |
21,245 | private void recordClockSkew ( long responseTimestamp ) { if ( responseTimestamp == 0L ) { logger . debug ( "no date timestamp on response, cannot record skew" ) ; } else { final long delta = clock ( ) . wallTime ( ) - responseTimestamp ; if ( delta >= 0L ) { timer ( CLOCK_SKEW_TIMER , "id" , "fast" ) . record ( delta ... | Record the difference between the date response time and the local time on the server . This is used to get a rough idea of the amount of skew in the environment . Ideally it should be fairly small . The date header will only have seconds so we expect to regularly have differences of up to 1 second . Note that it is a ... |
21,246 | List < List < Measurement > > getBatches ( ) { List < List < Measurement > > batches = new ArrayList < > ( ) ; List < Measurement > ms = getMeasurements ( ) . collect ( Collectors . toList ( ) ) ; for ( int i = 0 ; i < ms . size ( ) ; i += batchSize ) { List < Measurement > batch = ms . subList ( i , Math . min ( ms . ... | Get a list of all measurements and break them into batches . |
21,247 | public static AsciiSet control ( ) { final boolean [ ] members = new boolean [ 128 ] ; for ( char c = 0 ; c < members . length ; ++ c ) { members [ c ] = Character . isISOControl ( c ) ; } return new AsciiSet ( members ) ; } | Returns a set that matches ascii control characters . |
21,248 | private static String toPattern ( boolean [ ] members ) { StringBuilder buf = new StringBuilder ( ) ; if ( members [ '-' ] ) { buf . append ( '-' ) ; } boolean previous = false ; char s = 0 ; for ( int i = 0 ; i < members . length ; ++ i ) { if ( members [ i ] && ! previous ) { s = ( char ) i ; } else if ( ! members [ ... | Converts the members array to a pattern string . Used to provide a user friendly toString implementation for the set . |
21,249 | public boolean containsAll ( CharSequence str ) { final int n = str . length ( ) ; for ( int i = 0 ; i < n ; ++ i ) { if ( ! contains ( str . charAt ( i ) ) ) { return false ; } } return true ; } | Returns true if all characters in the string are contained within the set . |
21,250 | public String replaceNonMembers ( String input , char replacement ) { if ( ! contains ( replacement ) ) { throw new IllegalArgumentException ( replacement + " is not a member of " + pattern ) ; } return containsAll ( input ) ? input : replaceNonMembersImpl ( input , replacement ) ; } | Replace all characters in the input string with the replacement character . |
21,251 | public AsciiSet union ( AsciiSet set ) { final boolean [ ] unionMembers = new boolean [ 128 ] ; for ( int i = 0 ; i < unionMembers . length ; ++ i ) { unionMembers [ i ] = members [ i ] || set . members [ i ] ; } return new AsciiSet ( unionMembers ) ; } | Returns a new set that will match characters either in the this set or in the set that is provided . |
21,252 | public AsciiSet intersection ( AsciiSet set ) { final boolean [ ] intersectionMembers = new boolean [ 128 ] ; for ( int i = 0 ; i < intersectionMembers . length ; ++ i ) { intersectionMembers [ i ] = members [ i ] && set . members [ i ] ; } return new AsciiSet ( intersectionMembers ) ; } | Returns a new set that will match characters iff they are included this set and in the set that is provided . |
21,253 | public AsciiSet diff ( AsciiSet set ) { final boolean [ ] diffMembers = new boolean [ 128 ] ; for ( int i = 0 ; i < diffMembers . length ; ++ i ) { diffMembers [ i ] = members [ i ] && ! set . members [ i ] ; } return new AsciiSet ( diffMembers ) ; } | Returns a new set that will match characters iff they are included this set and not in the set that is provided . |
21,254 | public AsciiSet invert ( ) { final boolean [ ] invertMembers = new boolean [ 128 ] ; for ( int i = 0 ; i < invertMembers . length ; ++ i ) { invertMembers [ i ] = ! members [ i ] ; } return new AsciiSet ( invertMembers ) ; } | Returns a new set that will match characters that are not included this set . |
21,255 | public Optional < Character > character ( ) { char c = 0 ; int count = 0 ; for ( int i = 0 ; i < members . length ; ++ i ) { if ( members [ i ] ) { c = ( char ) i ; ++ count ; } } return ( count == 1 ) ? Optional . of ( c ) : Optional . empty ( ) ; } | If this set matches a single character then return an optional with that character . Otherwise return an empty optional . |
21,256 | public static PrototypeMeasurementFilterSpecification loadFromPath ( String path ) throws IOException { byte [ ] jsonData = Files . readAllBytes ( Paths . get ( path ) ) ; ObjectMapper objectMapper = new ObjectMapper ( ) ; return objectMapper . readValue ( jsonData , PrototypeMeasurementFilterSpecification . class ) ; ... | Loads a specification from a file . |
21,257 | public static Registry run ( String type , String test ) { Registry registry = createRegistry ( type ) ; TESTS . get ( test ) . accept ( registry ) ; return registry ; } | Run a test for a given type of registry . |
21,258 | @ SuppressWarnings ( "PMD" ) public static void main ( String [ ] args ) { if ( args . length < 2 ) { System . out . println ( "Usage: perf <registry> <test>" ) ; System . exit ( 1 ) ; } Registry registry = run ( args [ 0 ] , args [ 1 ] ) ; GraphLayout igraph = GraphLayout . parseInstance ( registry ) ; System . out . ... | Run a test and output the memory footprint of the registry . |
21,259 | public static Map < String , String > extractFrom ( Function < String , String > env ) { Map < String , String > headers = new LinkedHashMap < > ( ) ; addHeader ( headers , env , NetflixHeader . ASG , NETFLIX_ASG ) ; addHeader ( headers , env , NetflixHeader . Node , NETFLIX_NODE ) ; addHeader ( headers , env , Netflix... | Extract common Netflix headers from the specified function for retrieving the value of an environment variable . |
21,260 | public Evaluator sync ( Map < String , List < Subscription > > subs ) { Set < String > removed = subscriptions . keySet ( ) ; removed . removeAll ( subs . keySet ( ) ) ; removed . forEach ( this :: removeGroupSubscriptions ) ; subs . forEach ( this :: addGroupSubscriptions ) ; return this ; } | Synchronize the internal set of subscriptions with the map that is passed in . |
21,261 | public Evaluator addGroupSubscriptions ( String group , List < Subscription > subs ) { List < Subscription > oldSubs = subscriptions . put ( group , subs ) ; if ( oldSubs == null ) { LOGGER . debug ( "added group {} with {} subscriptions" , group , subs . size ( ) ) ; } else { LOGGER . debug ( "updated group {}, {} sub... | Add subscriptions for a given group . |
21,262 | public Evaluator removeGroupSubscriptions ( String group ) { List < Subscription > oldSubs = subscriptions . remove ( group ) ; if ( oldSubs != null ) { LOGGER . debug ( "removed group {} with {} subscriptions" , group , oldSubs . size ( ) ) ; } return this ; } | Remove subscriptions for a given group . |
21,263 | public EvalPayload eval ( String group , long timestamp , List < TagsValuePair > vs ) { List < Subscription > subs = subscriptions . getOrDefault ( group , Collections . emptyList ( ) ) ; List < EvalPayload . Metric > metrics = new ArrayList < > ( ) ; for ( Subscription s : subs ) { DataExpr expr = s . dataExpr ( ) ; f... | Evaluate expressions for all subscriptions associated with the specified group using the provided data . |
21,264 | public static void update ( Registry registry ) { Iterator < Map . Entry < Id , Object > > iter = registry . state ( ) . entrySet ( ) . iterator ( ) ; while ( iter . hasNext ( ) ) { Map . Entry < Id , Object > entry = iter . next ( ) ; if ( entry . getValue ( ) instanceof AbstractMeterState ) { AbstractMeterState tuple... | Force the polling of all meters associated with the registry . |
21,265 | public IncludeExcludePatterns metricToPatterns ( String metric ) { IncludeExcludePatterns foundPatterns = metricNameToPatterns . get ( metric ) ; if ( foundPatterns != null ) { return foundPatterns ; } foundPatterns = new IncludeExcludePatterns ( ) ; for ( MeterFilterPattern meterPattern : includePatterns ) { if ( mete... | Find the IncludeExcludePatterns for filtering a given metric . |
21,266 | public static PrototypeMeasurementFilter loadFromPath ( String path ) throws IOException { PrototypeMeasurementFilterSpecification spec = PrototypeMeasurementFilterSpecification . loadFromPath ( path ) ; return new PrototypeMeasurementFilter ( spec ) ; } | Factory method building a filter from a specification file . |
21,267 | public HttpRequestBuilder addHeader ( String name , String value ) { if ( value != null ) { reqHeaders . put ( name , value ) ; } return this ; } | Add a header to the request . Note the content type will be set automatically when providing the content payload and should not be set here . If the value is null then the header will get ignored . |
21,268 | static Matcher optimize ( Matcher matcher ) { Matcher m = matcher ; Matcher opt = optimizeSinglePass ( m ) ; for ( int i = 0 ; ! m . equals ( opt ) && i < MAX_ITERATIONS ; ++ i ) { m = opt ; opt = optimizeSinglePass ( m ) ; } return opt ; } | Return a new instance of the matcher that has been optimized . |
21,269 | static Matcher mergeNext ( Matcher matcher ) { if ( matcher instanceof SeqMatcher ) { List < Matcher > matchers = matcher . < SeqMatcher > as ( ) . matchers ( ) ; List < Matcher > ms = new ArrayList < > ( ) ; for ( int i = 0 ; i < matchers . size ( ) ; ++ i ) { Matcher m = matchers . get ( i ) ; if ( m instanceof Greed... | For greedy matchers go ahead and include the next portion of the match so it can be checked as we go along . Since there is no support for capturing the value we can stop as soon as it is detected there would be a match rather than finding the largest possible match . |
21,270 | static Matcher removeTrueInSequence ( Matcher matcher ) { if ( matcher instanceof SeqMatcher ) { List < Matcher > matchers = matcher . < SeqMatcher > as ( ) . matchers ( ) ; List < Matcher > ms = new ArrayList < > ( ) ; for ( Matcher m : matchers ) { if ( ! ( m instanceof TrueMatcher ) ) { ms . add ( m ) ; } } return S... | The true matcher is sometimes used as a placeholder while parsing . For sequences it isn t needed and it is faster to leave them out . |
21,271 | static Matcher sequenceWithFalseIsFalse ( Matcher matcher ) { if ( matcher instanceof SeqMatcher ) { for ( Matcher m : matcher . < SeqMatcher > as ( ) . matchers ( ) ) { if ( m instanceof FalseMatcher ) { return FalseMatcher . INSTANCE ; } } } return matcher ; } | If a sequence contains an explicit false matcher then the whole sequence will never match and can be treated as false . |
21,272 | static Matcher sequenceWithStuffAfterEndIsFalse ( Matcher matcher ) { if ( matcher instanceof SeqMatcher ) { boolean end = false ; for ( Matcher m : matcher . < SeqMatcher > as ( ) . matchers ( ) ) { if ( m instanceof EndMatcher ) { end = true ; } else if ( end && ! m . alwaysMatches ( ) ) { return FalseMatcher . INSTA... | If a sequence contains content after an end anchor then it will never be able to match and can be treated as false . |
21,273 | static Matcher convertEmptyCharClassToFalse ( Matcher matcher ) { if ( matcher instanceof CharClassMatcher ) { return matcher . < CharClassMatcher > as ( ) . set ( ) . isEmpty ( ) ? FalseMatcher . INSTANCE : matcher ; } return matcher ; } | If a character class is empty then it will not match anything and can be treated as false . |
21,274 | static Matcher inlineMatchAnyPrecedingOr ( Matcher matcher ) { if ( matcher instanceof ZeroOrMoreMatcher ) { ZeroOrMoreMatcher zm = matcher . as ( ) ; if ( zm . repeated ( ) instanceof AnyMatcher && zm . next ( ) instanceof OrMatcher ) { List < Matcher > matchers = zm . next ( ) . < OrMatcher > as ( ) . matchers ( ) ; ... | If the matcher preceding an OR clause is a repeated any match move into each branch of the OR clause . This allows for other optimizations such as conversion to an indexOf to take effect for each branch . |
21,275 | static Matcher startsWithCharSeq ( Matcher matcher ) { if ( matcher instanceof SeqMatcher ) { List < Matcher > matchers = matcher . < SeqMatcher > as ( ) . matchers ( ) ; if ( matchers . size ( ) >= 2 && matchers . get ( 0 ) instanceof StartMatcher && matchers . get ( 1 ) instanceof CharSeqMatcher ) { List < Matcher > ... | If the matcher has a start anchored character sequence then replace it with a StartsWithMatcher . In a tight loop this is much faster than a running with a sequence of two matchers . |
21,276 | static Matcher combineCharSeqAfterStartsWith ( Matcher matcher ) { if ( matcher instanceof SeqMatcher ) { List < Matcher > matchers = matcher . < SeqMatcher > as ( ) . matchers ( ) ; if ( matchers . size ( ) >= 2 && matchers . get ( 0 ) instanceof StartsWithMatcher && matchers . get ( 1 ) instanceof CharSeqMatcher ) { ... | If a char sequence is adjacent to a starts with matcher then append the sequence to the prefix pattern of the starts with matcher . |
21,277 | static Matcher combineCharSeqAfterIndexOf ( Matcher matcher ) { if ( matcher instanceof IndexOfMatcher ) { IndexOfMatcher m = matcher . as ( ) ; Matcher next = PatternUtils . head ( m . next ( ) ) ; if ( next instanceof CharSeqMatcher ) { String pattern = m . pattern ( ) + next . < CharSeqMatcher > as ( ) . pattern ( )... | If a char sequence is adjacent to an index of matcher then append the sequence to the pattern of the index of matcher . |
21,278 | static Matcher combineAdjacentCharSeqs ( Matcher matcher ) { if ( matcher instanceof SeqMatcher ) { List < Matcher > matchers = matcher . < SeqMatcher > as ( ) . matchers ( ) ; List < Matcher > ms = new ArrayList < > ( ) ; CharSeqMatcher cs1 = null ; for ( Matcher m : matchers ) { if ( m instanceof CharSeqMatcher ) { i... | If a char sequence is adjacent to another char sequence then concatenate the sequences . |
21,279 | static Matcher removeRepeatedStart ( Matcher matcher ) { if ( matcher instanceof ZeroOrMoreMatcher ) { ZeroOrMoreMatcher zm = matcher . as ( ) ; if ( zm . repeated ( ) instanceof StartMatcher ) { return zm . next ( ) ; } } return matcher ; } | Zero or more start anchors is the same as not being anchored by the start . |
21,280 | static Matcher combineAdjacentStart ( Matcher matcher ) { if ( matcher instanceof SeqMatcher ) { List < Matcher > matchers = matcher . < SeqMatcher > as ( ) . matchers ( ) ; if ( ! matchers . isEmpty ( ) && matchers . get ( 0 ) instanceof StartMatcher ) { List < Matcher > ms = new ArrayList < > ( ) ; ms . add ( StartMa... | Multiple adjacent start anchors can be reduced to a single start anchor . |
21,281 | public Predicate < Measurement > getDefaultMeasurementFilter ( ) throws IOException { if ( defaultMeasurementFilter != null ) { return defaultMeasurementFilter ; } if ( ! prototypeFilterPath . isEmpty ( ) ) { defaultMeasurementFilter = PrototypeMeasurementFilter . loadFromPath ( prototypeFilterPath ) ; } else { default... | The default measurement filter is configured through properties . |
21,282 | Map < String , MetricValues > encodeRegistry ( Registry sourceRegistry , Predicate < Measurement > filter ) { Map < String , MetricValues > metricMap = new HashMap < > ( ) ; for ( Meter meter : sourceRegistry ) { String kind = knownMeterKinds . computeIfAbsent ( meter . id ( ) , k -> meterToKind ( sourceRegistry , mete... | Internal API for encoding a registry that can be encoded as JSON . This is a helper function for the REST endpoint and to test against . |
21,283 | public static String meterToKind ( Registry registry , Meter meter ) { String kind ; if ( meter instanceof Timer ) { kind = "Timer" ; } else if ( meter instanceof Counter ) { kind = "Counter" ; } else if ( meter instanceof Gauge ) { kind = "Gauge" ; } else if ( meter instanceof DistributionSummary ) { kind = "Distribut... | Determine the type of a meter for reporting purposes . |
21,284 | public String header ( String k ) { List < String > vs = headers . get ( k ) ; return ( vs == null || vs . isEmpty ( ) ) ? null : vs . get ( 0 ) ; } | Return the value for the first occurrence of a given header or null if not found . |
21,285 | public Instant dateHeader ( String k ) { String d = header ( k ) ; return ( d == null ) ? null : parseDate ( d ) ; } | Return the value for a date header . The return value will be null if the header does not exist or if it cannot be parsed correctly as a date . |
21,286 | public HttpResponse decompress ( ) throws IOException { String enc = header ( "Content-Encoding" ) ; return ( enc != null && enc . contains ( "gzip" ) ) ? unzip ( ) : this ; } | Return a copy of the response with the entity decompressed . |
21,287 | static Config loadConfig ( String userResources ) { Config config = ConfigFactory . load ( "agent" ) ; if ( userResources != null && ! "" . equals ( userResources ) ) { for ( String userResource : userResources . split ( "[,\\s]+" ) ) { if ( userResource . startsWith ( "file:" ) ) { File file = new File ( userResource ... | Helper to load config files specified by the user . |
21,288 | public static void premain ( String arg , Instrumentation instrumentation ) throws Exception { Config config = loadConfig ( arg ) ; LOGGER . debug ( "loaded configuration: {}" , config . root ( ) . render ( ) ) ; createDependencyProperties ( config ) ; AtlasRegistry registry = new AtlasRegistry ( Clock . SYSTEM , new A... | Entry point for the agent . |
21,289 | static JmxMeasurementConfig from ( Config config ) { String name = config . getString ( "name" ) ; Map < String , String > tags = config . getConfigList ( "tags" ) . stream ( ) . collect ( Collectors . toMap ( c -> c . getString ( "key" ) , c -> c . getString ( "value" ) ) ) ; String value = config . getString ( "value... | Create from a Typesafe Config object . |
21,290 | static byte [ ] gzip ( byte [ ] data , int level ) throws IOException { ByteArrayOutputStream baos = new ByteArrayOutputStream ( data . length ) ; try ( GzipLevelOutputStream out = new GzipLevelOutputStream ( baos ) ) { out . setLevel ( level ) ; out . write ( data ) ; } return baos . toByteArray ( ) ; } | Compress a byte array using GZIP with the given compression level . |
21,291 | @ SuppressWarnings ( "PMD.AssignmentInOperand" ) static byte [ ] gunzip ( byte [ ] data ) throws IOException { ByteArrayOutputStream baos = new ByteArrayOutputStream ( data . length * 10 ) ; try ( InputStream in = new GZIPInputStream ( new ByteArrayInputStream ( data ) ) ) { byte [ ] buffer = new byte [ 4096 ] ; int le... | Decompress a GZIP compressed byte array . |
21,292 | public static Config createConfig ( Config config ) { try { CompositeConfig cc = new DefaultCompositeConfig ( true ) ; cc . addConfig ( "ATLAS" , loadPropFiles ( ) ) ; cc . addConfig ( "ENVIRONMENT" , EnvironmentConfig . INSTANCE ) ; cc . addConfig ( "SYS" , SystemConfig . INSTANCE ) ; if ( config != null ) { LOGGER . ... | Create a config to be used in the Netflix Cloud . |
21,293 | public static Map < String , String > commonTags ( ) { final Map < String , String > commonTags = new HashMap < > ( ) ; put ( commonTags , "nf.app" , Env . app ( ) ) ; put ( commonTags , "nf.cluster" , Env . cluster ( ) ) ; put ( commonTags , "nf.asg" , Env . asg ( ) ) ; put ( commonTags , "nf.stack" , Env . stack ( ) ... | Infrastructure tags that are common across all metrics . Used for deduplication and for providing a scope for the metrics produced . |
21,294 | public static SparkNameFunction fromConfig ( Config config , String key , Registry registry ) { return fromPatternList ( config . getConfigList ( key ) , registry ) ; } | Create a name function based on a config . |
21,295 | public String sequence ( ) { return dN == asg . length ( ) ? null : substr ( asg , dN + 1 , asg . length ( ) ) ; } | If the server group has a sequence number then return it . Otherwise return null . |
21,296 | public synchronized void start ( GcEventListener listener ) { if ( notifListener != null ) { LOGGER . warn ( "logger already started" ) ; return ; } eventListener = listener ; notifListener = new GcNotificationListener ( ) ; for ( GarbageCollectorMXBean mbean : ManagementFactory . getGarbageCollectorMXBeans ( ) ) { if ... | Start collecting data about GC events . |
21,297 | public synchronized void stop ( ) { Preconditions . checkState ( notifListener != null , "logger has not been started" ) ; for ( GarbageCollectorMXBean mbean : ManagementFactory . getGarbageCollectorMXBeans ( ) ) { if ( mbean instanceof NotificationEmitter ) { final NotificationEmitter emitter = ( NotificationEmitter )... | Stop collecting GC events . |
21,298 | public List < GcEvent > getLogs ( ) { final List < GcEvent > logs = new ArrayList < > ( ) ; for ( CircularBuffer < GcEvent > buffer : gcLogs . values ( ) ) { logs . addAll ( buffer . toList ( ) ) ; } Collections . sort ( logs , GcEvent . REVERSE_TIME_ORDER ) ; return logs ; } | Return the current set of GC events in the in - memory log . |
21,299 | private boolean isStatusSet ( ExecutionAttributes attrs ) { Boolean s = attrs . getAttribute ( STATUS_IS_SET ) ; return s != null && s ; } | For network errors there will not be a response so the status will not have been set . This method looks for a flag in the attributes to see if we need to close off the log entry for the attempt . |
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