File size: 5,762 Bytes
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import logging
from typing import Any
from .event_bus import EventBus
from .memory import MemoryEngine
from .policy import PolicyEngine, PolicyContext
from .observability import ObservabilityBrain
from .healing import SelfHealingEngine
logger = logging.getLogger("qkernel.core")
EVENT_TYPES = {
"USER_MESSAGE",
"POLICY_DECISION",
"MEMORY_READ",
"MEMORY_WRITE",
"TRACE_EVENT",
"SERVICE_CALL",
"RESPONSE_READY",
"NODE_FAILURE",
"HEALING_EVENT",
}
class BaseService:
name: str = "base"
async def process(self, event: dict) -> dict:
raise NotImplementedError
class QKernel:
def __init__(
self,
memory: MemoryEngine | None = None,
policy: PolicyEngine | None = None,
obs: ObservabilityBrain | None = None,
event_bus: EventBus | None = None,
healer: SelfHealingEngine | None = None,
):
self.memory = memory or MemoryEngine()
self.policy = policy or PolicyEngine()
self.obs = obs or ObservabilityBrain()
self.bus = event_bus or EventBus()
self.healer = healer or SelfHealingEngine()
self._services: dict[str, BaseService] = {}
def register_service(self, name: str, service: BaseService) -> None:
service.name = name
self._services[name] = service
logger.info("Service registered: %s", name)
def _route(self, event: dict) -> str:
msg_type = event.get("type", "chat")
if msg_type == "voice":
return "voice"
if msg_type == "network":
return "network"
return "brain"
async def handle(self, event: dict) -> dict:
start = time.time()
trace_id = self.obs.start_trace(event)
await self.bus.publish("USER_MESSAGE", event)
policy_start = time.time()
policy_ctx: PolicyContext = self.policy.evaluate(event)
self.obs.record_latency("policy_latency", time.time() - policy_start)
await self.bus.publish("POLICY_DECISION", {
"trace_id": trace_id,
"allowed": policy_ctx.allowed,
"route_override": policy_ctx.route_override,
"priority_boost": policy_ctx.priority_boost,
})
if not policy_ctx.allowed:
self.obs.add_step(trace_id, "blocked_by_policy", {
"reason": "policy_denied",
})
self.obs.end_trace(trace_id, success=False)
await self._check_healing({
"latency": (time.time() - start) * 1000,
"error_rate": self.obs.get_metrics().get("error_rate", 0),
})
return {"error": "blocked_by_policy", "trace_id": trace_id}
service_name = policy_ctx.route_override or self._route(event)
service = self._services.get(service_name)
if service is None:
self.obs.add_step(trace_id, "service_not_found", {
"service": service_name,
})
self.obs.end_trace(trace_id, success=False)
return {"error": f"service_not_found: {service_name}", "trace_id": trace_id}
memory_start = time.time()
context = self.memory.read(
event.get("user_id", "anonymous"),
event.get("session_id", "default"),
)
self.obs.record_latency("memory_latency", time.time() - memory_start)
self.obs.add_step(trace_id, "memory_loaded", {"context_size": len(context)})
await self.bus.publish("MEMORY_READ", {
"trace_id": trace_id,
"user_id": event.get("user_id"),
"session_id": event.get("session_id"),
"context_size": len(context),
})
enriched = {
**event,
"context": context,
"trace_id": trace_id,
}
await self.bus.publish("SERVICE_CALL", {
"trace_id": trace_id,
"service": service_name,
})
service_start = time.time()
result = await service.process(enriched)
self.obs.record_latency("service_latency", time.time() - service_start)
self.obs.add_step(trace_id, "service_completed", {
"service": service_name,
"latency": time.time() - service_start,
})
response_text = result.get("response", "")
memory_write_start = time.time()
self.memory.write(
event.get("user_id", "anonymous"),
event.get("session_id", "default"),
"assistant",
response_text,
)
self.obs.record_latency("memory_latency", time.time() - memory_write_start)
await self.bus.publish("MEMORY_WRITE", {
"trace_id": trace_id,
"response_length": len(response_text),
})
self.obs.end_trace(trace_id, success=True)
await self.bus.publish("RESPONSE_READY", {
"trace_id": trace_id,
"response_length": len(response_text),
})
total_time = time.time() - start
await self._check_healing({
"latency": total_time * 1000,
"error_rate": self.obs.get_metrics().get("error_rate", 0),
})
return {
**result,
"trace_id": trace_id,
"processing_time_ms": round(total_time * 1000, 2),
}
async def _check_healing(self, metrics: dict) -> None:
if self.healer.detect(metrics):
await self.bus.publish("HEALING_EVENT", metrics)
def get_stats(self) -> dict:
return {
"memory": self.memory.get_stats(),
"metrics": self.obs.get_metrics(),
"services": list(self._services.keys()),
"healing_history": len(self.healer.get_history()),
}
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