mirror of
https://github.com/trustgraph-ai/trustgraph.git
synced 2026-06-26 07:08:06 +02:00
Config push notify pattern: replace stateful pub/sub with signal+ fetch (#760)
Replace the config push mechanism that broadcast the full config blob on a 'state' class pub/sub queue with a lightweight notify signal containing only the version number and affected config types. Processors fetch the full config via request/response from the config service when notified. This eliminates the need for the pub/sub 'state' queue class and stateful pub/sub services entirely. The config push queue moves from 'state' to 'flow' class — a simple transient signal rather than a retained message. This solves the RabbitMQ late-subscriber problem where restarting processes never received the current config because their fresh queue had no historical messages. Key changes: - ConfigPush schema: config dict replaced with types list - Subscribe-then-fetch startup with retry: processors subscribe to notify queue, fetch config via request/response, then process buffered notifies with version comparison to avoid race conditions - register_config_handler() accepts optional types parameter so handlers only fire when their config types change - Short-lived config request/response clients to avoid subscriber contention on non-persistent response topics - Config service passes affected types through put/delete/flow operations - Gateway ConfigReceiver rewritten with same notify pattern and retry loop Tests updated New tests: - register_config_handler: without types, with types, multiple types, multiple handlers - on_config_notify: old/same version skipped, irrelevant types skipped (version still updated), relevant type triggers fetch, handler without types always called, mixed handler filtering, empty types invokes all, fetch failure handled gracefully - fetch_config: returns config+version, raises on error response, stops client even on exception - fetch_and_apply_config: applies to all handlers on startup, retries on failure
This commit is contained in:
cybermaggedon
GitHub
parent
d4723566cb
commit
4acd853023
37 changed files with 1449 additions and 406 deletions
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@ -24,7 +24,7 @@ class Service(ToolService):
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**params
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)
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self.register_config_handler(self.on_mcp_config)
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self.register_config_handler(self.on_mcp_config, types=["mcp-tool"])
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self.mcp_services = {}
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@ -148,18 +148,7 @@ class Configuration:
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async def handle_delete(self, v):
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# for k in v.keys:
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# if k.type not in self or k.key not in self[k.type]:
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# return ConfigResponse(
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# version = None,
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# values = None,
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# directory = None,
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# config = None,
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# error = Error(
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# type = "key-error",
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# message = f"Key error"
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# )
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# )
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types = list(set(k.type for k in v.keys))
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for k in v.keys:
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@ -167,20 +156,22 @@ class Configuration:
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await self.inc_version()
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await self.push()
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await self.push(types=types)
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return ConfigResponse(
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)
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async def handle_put(self, v):
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types = list(set(k.type for k in v.values))
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for k in v.values:
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await self.table_store.put_config(k.type, k.key, k.value)
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await self.inc_version()
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await self.push()
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await self.push(types=types)
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return ConfigResponse(
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)
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@ -126,12 +126,12 @@ class FlowConfig:
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await self.config.inc_version()
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await self.config.push()
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await self.config.push(types=["flow-blueprint"])
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return FlowResponse(
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error = None,
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)
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async def handle_delete_blueprint(self, msg):
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logger.debug(f"Flow config message: {msg}")
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@ -140,7 +140,7 @@ class FlowConfig:
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await self.config.inc_version()
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await self.config.push()
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await self.config.push(types=["flow-blueprint"])
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return FlowResponse(
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error = None,
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@ -270,7 +270,7 @@ class FlowConfig:
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await self.config.inc_version()
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await self.config.push()
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await self.config.push(types=["active-flow", "flow"])
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return FlowResponse(
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error = None,
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@ -332,12 +332,12 @@ class FlowConfig:
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await self.config.inc_version()
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await self.config.push()
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await self.config.push(types=["active-flow", "flow"])
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return FlowResponse(
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error = None,
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)
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async def handle(self, msg):
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logger.debug(f"Handling flow message: {msg.operation}")
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@ -167,25 +167,22 @@ class Processor(AsyncProcessor):
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async def start(self):
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await self.push()
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await self.push() # Startup poke: empty types = everything
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await self.config_request_consumer.start()
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await self.flow_request_consumer.start()
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async def push(self):
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config = await self.config.get_config()
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async def push(self, types=None):
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version = await self.config.get_version()
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resp = ConfigPush(
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version = version,
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config = config,
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types = types or [],
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)
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await self.config_push_producer.send(resp)
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# Race condition, should make sure version & config sync
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logger.info(f"Pushed configuration version {await self.config.get_version()}")
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logger.info(f"Pushed config poke version {version}, types={resp.types}")
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async def on_config_request(self, msg, consumer, flow):
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@ -108,7 +108,7 @@ class Processor(AsyncProcessor):
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flow_config = self,
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)
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self.register_config_handler(self.on_knowledge_config)
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self.register_config_handler(self.on_knowledge_config, types=["kg-core"])
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self.flows = {}
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@ -66,8 +66,8 @@ class Processor(CollectionConfigHandler, FlowProcessor):
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)
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# Register config handlers
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self.register_config_handler(self.on_schema_config)
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self.register_config_handler(self.on_collection_config)
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self.register_config_handler(self.on_schema_config, types=["schema"])
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self.register_config_handler(self.on_collection_config, types=["collection"])
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# Schema storage: name -> RowSchema
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self.schemas: Dict[str, RowSchema] = {}
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@ -43,7 +43,7 @@ class Processor(FlowProcessor):
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self.template_id = template_id
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self.config_key = config_key
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self.register_config_handler(self.on_prompt_config)
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self.register_config_handler(self.on_prompt_config, types=["prompt"])
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self.register_specification(
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ConsumerSpec(
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@ -107,7 +107,7 @@ class Processor(FlowProcessor):
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)
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# Register config handler for ontology updates
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self.register_config_handler(self.on_ontology_config)
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self.register_config_handler(self.on_ontology_config, types=["ontology"])
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# Shared components (not flow-specific)
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self.ontology_loader = OntologyLoader()
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@ -82,7 +82,7 @@ class Processor(FlowProcessor):
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)
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# Register config handler for schema updates
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self.register_config_handler(self.on_schema_config)
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self.register_config_handler(self.on_schema_config, types=["schema"])
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# Schema storage: name -> RowSchema
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self.schemas: Dict[str, RowSchema] = {}
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@ -1,36 +1,27 @@
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"""
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API gateway. Offers HTTP services which are translated to interaction on the
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Pulsar bus.
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API gateway config receiver. Subscribes to config notify notifications and
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fetches full config via request/response to manage flow lifecycle.
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"""
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module = "api-gateway"
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# FIXME: Subscribes to Pulsar unnecessarily, should only do it when there
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# are active listeners
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# FIXME: Connection errors in publishers / subscribers cause those threads
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# to fail and are not failed or retried
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import asyncio
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import argparse
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from aiohttp import web
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import logging
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import os
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import base64
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import uuid
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# Module logger
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logger = logging.getLogger(__name__)
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import logging
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import json
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from prometheus_client import start_http_server
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from ... schema import ConfigPush, config_push_queue
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from ... base import Consumer
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from ... schema import ConfigPush, ConfigRequest, ConfigResponse
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from ... schema import config_push_queue, config_request_queue
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from ... schema import config_response_queue
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from ... base import Consumer, Producer
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from ... base.subscriber import Subscriber
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from ... base.request_response_spec import RequestResponse
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from ... base.metrics import ProducerMetrics, SubscriberMetrics
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logger = logging.getLogger("config.receiver")
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logger.setLevel(logging.INFO)
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class ConfigReceiver:
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def __init__(self, backend):
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@ -41,34 +32,107 @@ class ConfigReceiver:
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self.flows = {}
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self.config_version = 0
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def add_handler(self, h):
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self.flow_handlers.append(h)
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async def on_config(self, msg, proc, flow):
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async def on_config_notify(self, msg, proc, flow):
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try:
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v = msg.value()
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notify_version = v.version
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notify_types = set(v.types)
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logger.info(f"Config version: {v.version}")
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# Skip if we already have this version or newer
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if notify_version <= self.config_version:
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logger.debug(
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f"Ignoring config notify v{notify_version}, "
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f"already at v{self.config_version}"
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)
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return
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flows = v.config.get("flow", {})
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# Gateway cares about flow config
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if notify_types and "flow" not in notify_types and "active-flow" not in notify_types:
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logger.debug(
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f"Ignoring config notify v{notify_version}, "
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f"no flow types in {notify_types}"
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)
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self.config_version = notify_version
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return
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wanted = list(flows.keys())
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current = list(self.flows.keys())
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logger.info(
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f"Config notify v{notify_version}, fetching config..."
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)
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for k in wanted:
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if k not in current:
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self.flows[k] = json.loads(flows[k])
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await self.start_flow(k, self.flows[k])
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for k in current:
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if k not in wanted:
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await self.stop_flow(k, self.flows[k])
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del self.flows[k]
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await self.fetch_and_apply()
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except Exception as e:
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logger.error(f"Config processing exception: {e}", exc_info=True)
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logger.error(
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f"Config notify processing exception: {e}", exc_info=True
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)
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async def fetch_and_apply(self, retry=False):
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"""Fetch full config and apply flow changes.
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If retry=True, keeps retrying until successful."""
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while True:
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try:
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logger.info("Fetching config from config service...")
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resp = await self.config_client.request(
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ConfigRequest(operation="config"),
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timeout=10,
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)
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logger.info(f"Config response received")
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if resp.error:
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if retry:
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logger.warning(
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f"Config fetch error: {resp.error.message}, "
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f"retrying in 2s..."
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)
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await asyncio.sleep(2)
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continue
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logger.error(
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f"Config fetch error: {resp.error.message}"
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)
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return
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self.config_version = resp.version
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config = resp.config
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flows = config.get("flow", {})
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wanted = list(flows.keys())
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current = list(self.flows.keys())
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for k in wanted:
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if k not in current:
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self.flows[k] = json.loads(flows[k])
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await self.start_flow(k, self.flows[k])
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for k in current:
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if k not in wanted:
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await self.stop_flow(k, self.flows[k])
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del self.flows[k]
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return
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except Exception as e:
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if retry:
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logger.warning(
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f"Config fetch failed: {e}, retrying in 2s..."
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)
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await asyncio.sleep(2)
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continue
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logger.error(
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f"Config fetch exception: {e}", exc_info=True
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)
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return
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async def start_flow(self, id, flow):
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@ -79,7 +143,9 @@ class ConfigReceiver:
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try:
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await handler.start_flow(id, flow)
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except Exception as e:
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logger.error(f"Config processing exception: {e}", exc_info=True)
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logger.error(
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f"Config processing exception: {e}", exc_info=True
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)
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async def stop_flow(self, id, flow):
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@ -90,32 +156,80 @@ class ConfigReceiver:
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try:
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await handler.stop_flow(id, flow)
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except Exception as e:
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logger.error(f"Config processing exception: {e}", exc_info=True)
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logger.error(
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f"Config processing exception: {e}", exc_info=True
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)
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async def config_loader(self):
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async with asyncio.TaskGroup() as tg:
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while True:
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id = str(uuid.uuid4())
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try:
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self.config_cons = Consumer(
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taskgroup = tg,
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flow = None,
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backend = self.backend,
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subscriber = f"gateway-{id}",
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topic = config_push_queue,
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schema = ConfigPush,
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handler = self.on_config,
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start_of_messages = True,
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)
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async with asyncio.TaskGroup() as tg:
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await self.config_cons.start()
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id = str(uuid.uuid4())
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logger.debug("Waiting for config updates...")
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# Config request/response client
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config_req_metrics = ProducerMetrics(
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processor="api-gateway", flow=None,
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name="config-request",
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)
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config_resp_metrics = SubscriberMetrics(
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processor="api-gateway", flow=None,
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name="config-response",
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)
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logger.info("Config consumer finished")
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self.config_client = RequestResponse(
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backend=self.backend,
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subscription=f"api-gateway--config--{id}",
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consumer_name="api-gateway",
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request_topic=config_request_queue,
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request_schema=ConfigRequest,
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request_metrics=config_req_metrics,
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response_topic=config_response_queue,
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response_schema=ConfigResponse,
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response_metrics=config_resp_metrics,
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)
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logger.info("Starting config request/response client...")
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await self.config_client.start()
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logger.info("Config request/response client started")
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# Subscribe to notify queue
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self.config_cons = Consumer(
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taskgroup=tg,
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flow=None,
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backend=self.backend,
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subscriber=f"gateway-{id}",
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topic=config_push_queue,
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schema=ConfigPush,
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handler=self.on_config_notify,
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start_of_messages=False,
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)
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logger.info("Starting config notify consumer...")
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await self.config_cons.start()
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logger.info("Config notify consumer started")
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# Fetch current config (subscribe-then-fetch pattern)
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# Retry until config service is available
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await self.fetch_and_apply(retry=True)
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logger.info(
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"Config loader initialised, waiting for notifys..."
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)
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logger.warning("Config consumer exited, restarting...")
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except Exception as e:
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logger.error(
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f"Config loader exception: {e}, restarting in 4s...",
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exc_info=True
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)
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await asyncio.sleep(4)
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async def start(self):
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asyncio.create_task(self.config_loader())
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asyncio.create_task(self.config_loader())
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|
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@ -246,7 +246,7 @@ class Processor(AsyncProcessor):
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taskgroup = self.taskgroup,
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)
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self.register_config_handler(self.on_librarian_config)
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self.register_config_handler(self.on_librarian_config, types=["librarian"])
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self.flows = {}
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|
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@ -40,7 +40,7 @@ class Processor(FlowProcessor):
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}
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)
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self.register_config_handler(self.on_cost_config)
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self.register_config_handler(self.on_cost_config, types=["token-costs"])
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self.register_specification(
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ConsumerSpec(
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|
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@ -65,7 +65,7 @@ class Processor(FlowProcessor):
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)
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)
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self.register_config_handler(self.on_prompt_config)
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self.register_config_handler(self.on_prompt_config, types=["prompt"])
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# Null configuration, should reload quickly
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self.manager = PromptManager()
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|
|
@ -84,7 +84,7 @@ class Processor(FlowProcessor):
|
|||
)
|
||||
|
||||
# Register config handler for schema updates
|
||||
self.register_config_handler(self.on_schema_config)
|
||||
self.register_config_handler(self.on_schema_config, types=["schema"])
|
||||
|
||||
# Schema storage: name -> RowSchema
|
||||
self.schemas: Dict[str, RowSchema] = {}
|
||||
|
|
|
|||
|
|
@ -64,7 +64,7 @@ class Processor(FlowProcessor):
|
|||
)
|
||||
|
||||
# Register config handler for schema updates
|
||||
self.register_config_handler(self.on_schema_config)
|
||||
self.register_config_handler(self.on_schema_config, types=["schema"])
|
||||
|
||||
# Schema storage: name -> RowSchema
|
||||
self.schemas: Dict[str, RowSchema] = {}
|
||||
|
|
|
|||
|
|
@ -70,7 +70,7 @@ class Processor(FlowProcessor):
|
|||
)
|
||||
|
||||
# Register config handler for schema updates
|
||||
self.register_config_handler(self.on_schema_config)
|
||||
self.register_config_handler(self.on_schema_config, types=["schema"])
|
||||
|
||||
# Schema storage: name -> RowSchema
|
||||
self.schemas: Dict[str, RowSchema] = {}
|
||||
|
|
|
|||
|
|
@ -31,7 +31,7 @@ class Processor(CollectionConfigHandler, DocumentEmbeddingsStoreService):
|
|||
self.vecstore = DocVectors(store_uri)
|
||||
|
||||
# Register for config push notifications
|
||||
self.register_config_handler(self.on_collection_config)
|
||||
self.register_config_handler(self.on_collection_config, types=["collection"])
|
||||
|
||||
async def store_document_embeddings(self, message):
|
||||
|
||||
|
|
|
|||
|
|
@ -58,7 +58,7 @@ class Processor(CollectionConfigHandler, DocumentEmbeddingsStoreService):
|
|||
self.last_index_name = None
|
||||
|
||||
# Register for config push notifications
|
||||
self.register_config_handler(self.on_collection_config)
|
||||
self.register_config_handler(self.on_collection_config, types=["collection"])
|
||||
|
||||
def create_index(self, index_name, dim):
|
||||
|
||||
|
|
|
|||
|
|
@ -37,7 +37,7 @@ class Processor(CollectionConfigHandler, DocumentEmbeddingsStoreService):
|
|||
self.qdrant = QdrantClient(url=store_uri, api_key=api_key)
|
||||
|
||||
# Register for config push notifications
|
||||
self.register_config_handler(self.on_collection_config)
|
||||
self.register_config_handler(self.on_collection_config, types=["collection"])
|
||||
|
||||
async def store_document_embeddings(self, message):
|
||||
|
||||
|
|
|
|||
|
|
@ -45,7 +45,7 @@ class Processor(CollectionConfigHandler, GraphEmbeddingsStoreService):
|
|||
self.vecstore = EntityVectors(store_uri)
|
||||
|
||||
# Register for config push notifications
|
||||
self.register_config_handler(self.on_collection_config)
|
||||
self.register_config_handler(self.on_collection_config, types=["collection"])
|
||||
|
||||
async def store_graph_embeddings(self, message):
|
||||
|
||||
|
|
|
|||
|
|
@ -72,7 +72,7 @@ class Processor(CollectionConfigHandler, GraphEmbeddingsStoreService):
|
|||
self.last_index_name = None
|
||||
|
||||
# Register for config push notifications
|
||||
self.register_config_handler(self.on_collection_config)
|
||||
self.register_config_handler(self.on_collection_config, types=["collection"])
|
||||
|
||||
def create_index(self, index_name, dim):
|
||||
|
||||
|
|
|
|||
|
|
@ -52,7 +52,7 @@ class Processor(CollectionConfigHandler, GraphEmbeddingsStoreService):
|
|||
self.qdrant = QdrantClient(url=store_uri, api_key=api_key)
|
||||
|
||||
# Register for config push notifications
|
||||
self.register_config_handler(self.on_collection_config)
|
||||
self.register_config_handler(self.on_collection_config, types=["collection"])
|
||||
|
||||
async def store_graph_embeddings(self, message):
|
||||
|
||||
|
|
|
|||
|
|
@ -61,7 +61,7 @@ class Processor(CollectionConfigHandler, FlowProcessor):
|
|||
)
|
||||
|
||||
# Register config handler for collection management
|
||||
self.register_config_handler(self.on_collection_config)
|
||||
self.register_config_handler(self.on_collection_config, types=["collection"])
|
||||
|
||||
# Cache of created Qdrant collections
|
||||
self.created_collections: Set[str] = set()
|
||||
|
|
|
|||
|
|
@ -75,8 +75,8 @@ class Processor(CollectionConfigHandler, FlowProcessor):
|
|||
)
|
||||
|
||||
# Register config handlers
|
||||
self.register_config_handler(self.on_schema_config)
|
||||
self.register_config_handler(self.on_collection_config)
|
||||
self.register_config_handler(self.on_schema_config, types=["schema"])
|
||||
self.register_config_handler(self.on_collection_config, types=["collection"])
|
||||
|
||||
# Cache of known keyspaces and whether tables exist
|
||||
self.known_keyspaces: Set[str] = set()
|
||||
|
|
|
|||
|
|
@ -144,7 +144,7 @@ class Processor(CollectionConfigHandler, TriplesStoreService):
|
|||
self.tg = None
|
||||
|
||||
# Register for config push notifications
|
||||
self.register_config_handler(self.on_collection_config)
|
||||
self.register_config_handler(self.on_collection_config, types=["collection"])
|
||||
|
||||
async def store_triples(self, message):
|
||||
|
||||
|
|
|
|||
|
|
@ -57,7 +57,7 @@ class Processor(CollectionConfigHandler, TriplesStoreService):
|
|||
self.io = FalkorDB.from_url(graph_url).select_graph(database)
|
||||
|
||||
# Register for config push notifications
|
||||
self.register_config_handler(self.on_collection_config)
|
||||
self.register_config_handler(self.on_collection_config, types=["collection"])
|
||||
|
||||
def create_node(self, uri, user, collection):
|
||||
|
||||
|
|
|
|||
|
|
@ -66,7 +66,7 @@ class Processor(CollectionConfigHandler, TriplesStoreService):
|
|||
self.create_indexes(session)
|
||||
|
||||
# Register for config push notifications
|
||||
self.register_config_handler(self.on_collection_config)
|
||||
self.register_config_handler(self.on_collection_config, types=["collection"])
|
||||
|
||||
def create_indexes(self, session):
|
||||
|
||||
|
|
|
|||
|
|
@ -66,7 +66,7 @@ class Processor(CollectionConfigHandler, TriplesStoreService):
|
|||
self.create_indexes(session)
|
||||
|
||||
# Register for config push notifications
|
||||
self.register_config_handler(self.on_collection_config)
|
||||
self.register_config_handler(self.on_collection_config, types=["collection"])
|
||||
|
||||
def create_indexes(self, session):
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue