ClientStreamTracer.java

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package io.grpc;

import javax.annotation.concurrent.ThreadSafe;

/**
 * {@link StreamTracer} for the client-side.
 */
@ExperimentalApi("https://github.com/grpc/grpc-java/issues/2861")
@ThreadSafe
public abstract class ClientStreamTracer extends StreamTracer {
  /**
   * Headers has been sent to the socket.
   */
  public void outboundHeaders() {
  }

  /**
   * Headers has been received from the server.
   */
  public void inboundHeaders() {
  }

  /**
   * Factory class for {@link ClientStreamTracer}.
   */
  public abstract static class Factory {
    /**
     * Creates a {@link ClientStreamTracer} for a new client stream.
     *
     * @param headers the mutable headers of the stream. It can be safely mutated within this
     *        method.  It should not be saved because it is not safe for read or write after the
     *        method returns.
     */
    public abstract ClientStreamTracer newClientStreamTracer(Metadata headers);
  }
}