Tool service implementation

trustgraph-flow/trustgraph/agent/react/service.py

@@ -17,7 +17,7 @@ from ... base import RowEmbeddingsQueryClientSpec, EmbeddingsClientSpec
 
 from ... schema import AgentRequest, AgentResponse, AgentStep, Error
 
-from . tools import KnowledgeQueryImpl, TextCompletionImpl, McpToolImpl, PromptImpl, StructuredQueryImpl, RowEmbeddingsQueryImpl
+from . tools import KnowledgeQueryImpl, TextCompletionImpl, McpToolImpl, PromptImpl, StructuredQueryImpl, RowEmbeddingsQueryImpl, ToolServiceImpl
 from . agent_manager import AgentManager
 from ..tool_filter import validate_tool_config, filter_tools_by_group_and_state, get_next_state
 
@@ -51,6 +51,9 @@ class Processor(AgentService):
             additional_context="",
         )
 
+        # Track active tool service clients for cleanup
+        self.tool_service_clients = {}
+
         self.config_handlers.append(self.on_tools_config)
 
         self.register_specification(
@@ -110,6 +113,16 @@ class Processor(AgentService):
 
             tools = {}
 
+            # Load tool-service configurations first
+            tool_services = {}
+            if "tool-service" in config:
+                for service_id, service_value in config["tool-service"].items():
+                    service_data = json.loads(service_value)
+                    tool_services[service_id] = service_data
+                    logger.debug(f"Loaded tool-service config: {service_id}")
+
+            logger.info(f"Loaded {len(tool_services)} tool-service configurations")
+
             # Load tool configurations from the new location
             if "tool" in config:
                 for tool_id, tool_value in config["tool"].items():
@@ -177,6 +190,57 @@ class Processor(AgentService):
                             limit=int(data.get("limit", 10))  # Max results
                         )
                         arguments = RowEmbeddingsQueryImpl.get_arguments()
+                    elif impl_id == "tool-service":
+                        # Dynamic tool service - look up the service config
+                        service_ref = data.get("service")
+                        if not service_ref:
+                            raise RuntimeError(
+                                f"Tool {name} has type 'tool-service' but no 'service' reference"
+                            )
+                        if service_ref not in tool_services:
+                            raise RuntimeError(
+                                f"Tool {name} references unknown tool-service '{service_ref}'"
+                            )
+
+                        service_config = tool_services[service_ref]
+                        service_topic = service_config.get("topic")
+                        if not service_topic:
+                            raise RuntimeError(
+                                f"Tool-service '{service_ref}' has no 'topic' defined"
+                            )
+
+                        # Build config values from tool config
+                        # Extract any config params defined by the service
+                        config_params = service_config.get("config-params", [])
+                        config_values = {}
+                        for param in config_params:
+                            param_name = param.get("name") if isinstance(param, dict) else param
+                            if param_name in data:
+                                config_values[param_name] = data[param_name]
+                            elif isinstance(param, dict) and param.get("required", False):
+                                raise RuntimeError(
+                                    f"Tool {name} missing required config param '{param_name}'"
+                                )
+
+                        # Arguments come from tool config
+                        config_args = data.get("arguments", [])
+                        arguments = [
+                            Argument(
+                                name=arg.get("name"),
+                                type=arg.get("type"),
+                                description=arg.get("description")
+                            )
+                            for arg in config_args
+                        ]
+
+                        # Store topic for the implementation
+                        impl = functools.partial(
+                            ToolServiceImpl,
+                            service_topic=service_topic,
+                            config_values=config_values,
+                            arguments=arguments,
+                            processor=self,
+                        )
                     else:
                         raise RuntimeError(
                             f"Tool type {impl_id} not known"

trustgraph-flow/trustgraph/agent/react/tools.py

@@ -202,3 +202,116 @@ class PromptImpl:
             id=self.template_id,
             variables=arguments
         )
+
+
+# This tool implementation invokes a dynamically configured tool service
+class ToolServiceImpl:
+    """
+    Implementation for dynamically pluggable tool services.
+
+    Tool services are external Pulsar services that can be invoked as agent tools.
+    The service is configured via a tool-service descriptor that defines the topic,
+    and a tool descriptor that provides config values and argument definitions.
+    """
+
+    def __init__(self, context, service_topic, config_values=None, arguments=None, processor=None):
+        """
+        Initialize a tool service implementation.
+
+        Args:
+            context: The context function (provides user info)
+            service_topic: The base topic name for the service
+            config_values: Dict of config values (e.g., {"collection": "customers"})
+            arguments: List of Argument objects defining the tool's parameters
+            processor: The Processor instance (for pubsub access)
+        """
+        self.context = context
+        self.service_topic = service_topic
+        self.config_values = config_values or {}
+        self.arguments = arguments or []
+        self.processor = processor
+        self._client = None
+
+    def get_arguments(self):
+        return self.arguments
+
+    async def _get_or_create_client(self):
+        """Get or create the tool service client."""
+        if self._client is not None:
+            return self._client
+
+        # Check if processor already has a client for this topic
+        if self.service_topic in self.processor.tool_service_clients:
+            self._client = self.processor.tool_service_clients[self.service_topic]
+            return self._client
+
+        # Import here to avoid circular imports
+        from ....base.tool_service_client import ToolServiceClient
+        from ....base.metrics import ProducerMetrics, SubscriberMetrics
+        from ....schema import ToolServiceRequest, ToolServiceResponse
+        import uuid
+
+        request_topic = f"{self.service_topic}-request"
+        response_topic = f"{self.service_topic}-response"
+
+        request_metrics = ProducerMetrics(
+            processor=self.processor.id,
+            flow="tool-service",
+            name=request_topic
+        )
+        response_metrics = SubscriberMetrics(
+            processor=self.processor.id,
+            flow="tool-service",
+            name=response_topic
+        )
+
+        # Create unique subscription for responses
+        subscription = f"{self.processor.id}--tool-service--{self.service_topic}--{uuid.uuid4()}"
+
+        self._client = ToolServiceClient(
+            backend=self.processor.pubsub,
+            subscription=subscription,
+            consumer_name=self.processor.id,
+            request_topic=request_topic,
+            request_schema=ToolServiceRequest,
+            request_metrics=request_metrics,
+            response_topic=response_topic,
+            response_schema=ToolServiceResponse,
+            response_metrics=response_metrics,
+        )
+
+        # Start the client
+        await self._client.start()
+
+        # Register for cleanup
+        self.processor.tool_service_clients[self.service_topic] = self._client
+
+        logger.debug(f"Created tool service client for {self.service_topic}")
+        return self._client
+
+    async def invoke(self, **arguments):
+        logger.debug(f"Tool service invocation: {self.service_topic}...")
+        logger.debug(f"Config: {self.config_values}")
+        logger.debug(f"Arguments: {arguments}")
+
+        # Get user from context if available
+        user = "trustgraph"
+        if hasattr(self.context, '_user'):
+            user = self.context._user
+
+        # Get or create the client
+        client = await self._get_or_create_client()
+
+        # Call the tool service
+        response = await client.call(
+            user=user,
+            config=self.config_values,
+            arguments=arguments,
+        )
+
+        logger.debug(f"Tool service response: {response}")
+
+        if isinstance(response, str):
+            return response
+        else:
+            return json.dumps(response)