feat: add support for langchain embedding

instrumentation-loongsuite/loongsuite-instrumentation-langchain/CHANGELOG.md

@@ -9,6 +9,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- LangChain embedding span support
+  ([#157](https://github.com/alibaba/loongsuite-python-agent/pull/157))
 - Rerank / document-compressor span support
   ([#149](https://github.com/alibaba/loongsuite-python-agent/pull/149))
 

instrumentation-loongsuite/loongsuite-instrumentation-langchain/README.md

@@ -130,6 +130,7 @@ loongsuite-instrument <your_run_command>
 | ReAct Step | `STEP` | `gen_ai.operation.name=react`, `gen_ai.react.round`, `gen_ai.react.finish_reason` |
 | Tool | `TOOL` | `gen_ai.operation.name=execute_tool` |
 | Retriever | `RETRIEVER` | `gen_ai.operation.name=retrieval` |
+| Embedding | `EMBEDDING` | `gen_ai.operation.name=embeddings`, `gen_ai.request.model`, `gen_ai.provider.name`, `server.address`, `server.port`, `gen_ai.embeddings.dimension.count`, `gen_ai.request.encoding_formats` |
 | Reranker | `RERANKER` | `gen_ai.operation.name=rerank_documents`, `gen_ai.request.model`, `gen_ai.rerank.documents.count`, `gen_ai.request.top_k`, `gen_ai.rerank.input_documents`, `gen_ai.rerank.output_documents` (when content capture enabled) |
 
 ReAct Step spans are created for each Reasoning-Acting iteration, with the hierarchy: Agent > ReAct Step > LLM/Tool. Supported agent types:

instrumentation-loongsuite/loongsuite-instrumentation-langchain/src/opentelemetry/instrumentation/langchain/__init__.py

@@ -208,6 +208,29 @@ def _uninstrument_create_agent() -> None:
     _patched_create_agent_locations.clear()
 
 
+# ------------------------------------------------------------------
+# Embeddings patch
+# ------------------------------------------------------------------
+
+
+def _instrument_embeddings(handler: Any) -> None:
+    """Wrap all current and future ``Embeddings`` subclasses."""
+    from opentelemetry.instrumentation.langchain.internal.patch_embedding import (  # noqa: PLC0415
+        instrument_embeddings,
+    )
+
+    instrument_embeddings(handler)
+
+
+def _uninstrument_embeddings() -> None:
+    """Restore original ``Embeddings`` methods."""
+    from opentelemetry.instrumentation.langchain.internal.patch_embedding import (  # noqa: PLC0415
+        uninstrument_embeddings,
+    )
+
+    uninstrument_embeddings()
+
+
 # ------------------------------------------------------------------
 # BaseDocumentCompressor patch (rerank / compression)
 # ------------------------------------------------------------------
@@ -268,6 +291,7 @@ def _instrument(self, **kwargs: Any) -> None:
         _instrument_agent_executor()
         _instrument_create_agent()
         _instrument_document_compressor(handler)
+        _instrument_embeddings(handler)
 
     def _uninstrument(self, **kwargs: Any) -> None:
         try:
@@ -281,6 +305,7 @@ def _uninstrument(self, **kwargs: Any) -> None:
         _uninstrument_agent_executor()
         _uninstrument_create_agent()
         _uninstrument_document_compressor()
+        _uninstrument_embeddings()
 
 
 class _BaseCallbackManagerInit: