io.grpc.internal.ServerStream Maven / Gradle / Ivy
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package io.grpc.internal;
import io.grpc.Metadata;
import io.grpc.Status;
/**
* Extension of {@link Stream} to support server-side termination semantics.
*
* An implementation doesn't need to be thread-safe. All methods are expected to execute quickly.
*/
public interface ServerStream extends Stream {
/**
* Writes custom metadata as headers on the response stream sent to the client. This method may
* only be called once and cannot be called after calls to {@link Stream#writeMessage}
* or {@link #close}.
*
* @param headers to send to client.
*/
void writeHeaders(Metadata.Headers headers);
/**
* Closes the stream for both reading and writing. A status code of
* {@link io.grpc.Status.Code#OK} implies normal termination of the
* stream. Any other value implies abnormal termination.
*
* @param status details of the closure
* @param trailers an additional block of metadata to pass to the client on stream closure.
*/
void close(Status status, Metadata.Trailers trailers);
/**
* Tears down the stream, typically in the event of a timeout. This method may be called multiple
* times and from any thread.
*/
public void cancel(Status status);
}