MetadataUtils

java.lang.Object

io.grpc.stub.MetadataUtils

public final class MetadataUtils extends Object

Utility functions for binding and receiving headers.

Method Summary

Modifier and Type

Method

Description

static ClientInterceptor

newAttachHeadersInterceptor(Metadata extraHeaders)

Returns a client interceptor that attaches a set of headers to requests.

static ClientInterceptor

newCaptureMetadataInterceptor(AtomicReference<Metadata> headersCapture, AtomicReference<Metadata> trailersCapture)

Captures the last received metadata on a channel.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details
- newAttachHeadersInterceptor
  
  public static ClientInterceptor newAttachHeadersInterceptor(Metadata extraHeaders)
  
  Returns a client interceptor that attaches a set of headers to requests.
  
  Parameters:
  
  extraHeaders - the headers to be passed by each call that is processed by the returned interceptor
- newCaptureMetadataInterceptor
  
  public static ClientInterceptor newCaptureMetadataInterceptor(AtomicReference<Metadata> headersCapture, AtomicReference<Metadata> trailersCapture)
  
  Captures the last received metadata on a channel. Useful for testing.
  
  Parameters:
  
  headersCapture - to record the last received headers
  
  trailersCapture - to record the last received trailers
  
  Returns:
  
  an implementation of the channel with captures installed.