| // |
| // |
| // Copyright 2023 gRPC authors. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| // |
| // |
| |
| #ifndef GRPC_SRC_CPP_EXT_OTEL_OTEL_CALL_TRACER_H |
| #define GRPC_SRC_CPP_EXT_OTEL_OTEL_CALL_TRACER_H |
| |
| #include <grpc/support/port_platform.h> |
| |
| #include <stdint.h> |
| |
| #include <memory> |
| #include <string> |
| |
| #include "absl/base/thread_annotations.h" |
| #include "absl/status/status.h" |
| #include "absl/strings/string_view.h" |
| #include "absl/time/time.h" |
| |
| #include <grpc/support/time.h> |
| |
| #include "src/core/lib/channel/call_tracer.h" |
| #include "src/core/lib/channel/tcp_tracer.h" |
| #include "src/core/lib/gprpp/sync.h" |
| #include "src/core/lib/iomgr/error.h" |
| #include "src/core/lib/resource_quota/arena.h" |
| #include "src/core/lib/slice/slice.h" |
| #include "src/core/lib/slice/slice_buffer.h" |
| #include "src/core/lib/transport/metadata_batch.h" |
| #include "src/core/lib/transport/transport.h" |
| #include "src/cpp/ext/otel/otel_client_filter.h" |
| #include "src/cpp/ext/otel/otel_plugin.h" |
| |
| namespace grpc { |
| namespace internal { |
| |
| class OpenTelemetryCallTracer : public grpc_core::ClientCallTracer { |
| public: |
| class OpenTelemetryCallAttemptTracer : public CallAttemptTracer { |
| public: |
| OpenTelemetryCallAttemptTracer(const OpenTelemetryCallTracer* parent, |
| bool arena_allocated); |
| |
| std::string TraceId() override { |
| // Not implemented |
| return ""; |
| } |
| |
| std::string SpanId() override { |
| // Not implemented |
| return ""; |
| } |
| |
| bool IsSampled() override { |
| // Not implemented |
| return false; |
| } |
| |
| void RecordSendInitialMetadata( |
| grpc_metadata_batch* send_initial_metadata) override; |
| void RecordSendTrailingMetadata( |
| grpc_metadata_batch* /*send_trailing_metadata*/) override {} |
| void RecordSendMessage(const grpc_core::SliceBuffer& send_message) override; |
| void RecordSendCompressedMessage( |
| const grpc_core::SliceBuffer& send_compressed_message) override; |
| void RecordReceivedInitialMetadata( |
| grpc_metadata_batch* recv_initial_metadata) override; |
| void RecordReceivedMessage( |
| const grpc_core::SliceBuffer& recv_message) override; |
| void RecordReceivedDecompressedMessage( |
| const grpc_core::SliceBuffer& recv_decompressed_message) override; |
| void RecordReceivedTrailingMetadata( |
| absl::Status status, grpc_metadata_batch* /*recv_trailing_metadata*/, |
| const grpc_transport_stream_stats* transport_stream_stats) override; |
| void RecordCancel(grpc_error_handle cancel_error) override; |
| void RecordEnd(const gpr_timespec& /*latency*/) override; |
| void RecordAnnotation(absl::string_view /*annotation*/) override; |
| void RecordAnnotation(const Annotation& /*annotation*/) override; |
| std::shared_ptr<grpc_core::TcpTracerInterface> StartNewTcpTrace() override; |
| |
| private: |
| const OpenTelemetryCallTracer* parent_; |
| const bool arena_allocated_; |
| // Start time (for measuring latency). |
| absl::Time start_time_; |
| std::unique_ptr<LabelsIterable> injected_labels_; |
| std::vector<std::unique_ptr<LabelsIterable>> |
| injected_labels_from_plugin_options_; |
| }; |
| |
| explicit OpenTelemetryCallTracer(OpenTelemetryClientFilter* parent, |
| grpc_core::Slice path, |
| grpc_core::Arena* arena, |
| bool registered_method); |
| ~OpenTelemetryCallTracer() override; |
| |
| std::string TraceId() override { |
| // Not implemented |
| return ""; |
| } |
| |
| std::string SpanId() override { |
| // Not implemented |
| return ""; |
| } |
| |
| bool IsSampled() override { |
| // Not implemented |
| return false; |
| } |
| |
| OpenTelemetryCallAttemptTracer* StartNewAttempt( |
| bool is_transparent_retry) override; |
| void RecordAnnotation(absl::string_view /*annotation*/) override; |
| void RecordAnnotation(const Annotation& /*annotation*/) override; |
| |
| private: |
| absl::string_view MethodForStats() const; |
| |
| const OpenTelemetryClientFilter* parent_; |
| // Client method. |
| grpc_core::Slice path_; |
| grpc_core::Arena* arena_; |
| const bool registered_method_; |
| grpc_core::Mutex mu_; |
| // Non-transparent attempts per call |
| uint64_t retries_ ABSL_GUARDED_BY(&mu_) = 0; |
| // Transparent retries per call |
| uint64_t transparent_retries_ ABSL_GUARDED_BY(&mu_) = 0; |
| }; |
| |
| } // namespace internal |
| } // namespace grpc |
| |
| #endif // GRPC_SRC_CPP_EXT_OTEL_OTEL_CALL_TRACER_H |