use postgres to store traces and query

llama_stack/providers/utils/telemetry/postgres.py

@@ -0,0 +1,114 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the terms described in the LICENSE file in
+# the root directory of this source tree.
+
+import json
+from datetime import datetime
+from typing import List, Optional
+
+import psycopg2
+
+from llama_stack.apis.telemetry import Span, SpanNode, Trace, TraceStore, TraceTree
+
+
+class PostgresTraceStore(TraceStore):
+    def __init__(self, conn_string: str):
+        self.conn_string = conn_string
+
+    async def get_trace(self, trace_id: str) -> Optional[TraceTree]:
+        try:
+            with psycopg2.connect(self.conn_string) as conn:
+                with conn.cursor() as cur:
+                    # Fetch all spans for the trace
+                    cur.execute(
+                        """
+                        SELECT trace_id, span_id, parent_span_id, name,
+                               start_time, end_time, attributes
+                        FROM traces
+                        WHERE trace_id = %s
+                        """,
+                        (trace_id,),
+                    )
+                    spans_data = cur.fetchall()
+
+                    if not spans_data:
+                        return None
+
+                    # First pass: Build span map
+                    span_map = {}
+                    for span_data in spans_data:
+                        # Ensure attributes is a string before parsing
+                        attributes = span_data[6]
+                        if isinstance(attributes, dict):
+                            attributes = json.dumps(attributes)
+
+                        span = Span(
+                            span_id=span_data[1],
+                            trace_id=span_data[0],
+                            name=span_data[3],
+                            start_time=span_data[4],
+                            end_time=span_data[5],
+                            parent_span_id=span_data[2],
+                            attributes=json.loads(
+                                attributes
+                            ),  # Now safely parse the JSON string
+                        )
+                        span_map[span.span_id] = SpanNode(span=span)
+
+                    # Second pass: Build parent-child relationships
+                    root_node = None
+                    for span_node in span_map.values():
+                        parent_id = span_node.span.parent_span_id
+                        if parent_id and parent_id in span_map:
+                            span_map[parent_id].children.append(span_node)
+                        elif not parent_id:
+                            root_node = span_node
+
+                    trace = Trace(
+                        trace_id=trace_id,
+                        root_span_id=root_node.span.span_id if root_node else "",
+                        start_time=(
+                            root_node.span.start_time if root_node else datetime.now()
+                        ),
+                        end_time=root_node.span.end_time if root_node else None,
+                    )
+
+                    return TraceTree(trace=trace, root=root_node)
+
+        except Exception as e:
+            raise Exception(
+                f"Error querying PostgreSQL trace structure: {str(e)}"
+            ) from e
+
+    async def get_traces_for_sessions(self, session_ids: List[str]) -> List[Trace]:
+        traces = []
+        try:
+            with psycopg2.connect(self.conn_string) as conn:
+                with conn.cursor() as cur:
+                    # Query traces for all session IDs
+                    cur.execute(
+                        """
+                        SELECT DISTINCT trace_id, MIN(start_time) as start_time
+                        FROM traces
+                        WHERE attributes->>'session_id' = ANY(%s)
+                        GROUP BY trace_id
+                        """,
+                        (session_ids,),
+                    )
+                    traces_data = cur.fetchall()
+
+                    for trace_data in traces_data:
+                        traces.append(
+                            Trace(
+                                trace_id=trace_data[0],
+                                root_span_id="",
+                                start_time=trace_data[1],
+                            )
+                        )
+
+        except Exception as e:
+            raise Exception(f"Error querying PostgreSQL traces: {str(e)}") from e
+
+        return traces