Package com.google.cloud.spanner.spi.v1

Class TraceContextInterceptor

java.lang.Object

com.google.cloud.spanner.spi.v1.TraceContextInterceptor

All Implemented Interfaces:

io.grpc.ClientInterceptor

public class TraceContextInterceptor
extends Object
implements io.grpc.ClientInterceptor

Intercepts all gRPC calls and injects trace context related headers to propagate trace context to Spanner. This class takes reference from OpenTelemetry's JAVA instrumentation library for gRPC. https://github.com/open-telemetry/opentelemetry-java-instrumentation/blob/9ecf7965aa455d41ea8cc0761b6c6b6eeb106324/instrumentation/grpc-1.6/library/src/main/java/io/opentelemetry/instrumentation/grpc/v1_6/TracingClientInterceptor.java#L27

Constructor Summary

Constructors

Constructor	Description
TraceContextInterceptor(io.opentelemetry.api.OpenTelemetry openTelemetry)

Method Summary

Modifier and Type	Method	Description
<ReqT, RespT> io.grpc.ClientCall<ReqT,RespT>	interceptCall(io.grpc.MethodDescriptor<ReqT,RespT> method, io.grpc.CallOptions callOptions, io.grpc.Channel next)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

TraceContextInterceptor

public TraceContextInterceptor(io.opentelemetry.api.OpenTelemetry openTelemetry)

Method Details

interceptCall

public <ReqT,
RespT> io.grpc.ClientCall<ReqT,RespT> interceptCall(io.grpc.MethodDescriptor<ReqT,RespT> method,
 io.grpc.CallOptions callOptions,
 io.grpc.Channel next)

Specified by:

interceptCall in interface io.grpc.ClientInterceptor