io.grpc.ForwardingClientCall Maven / Gradle / Ivy
/*
* Copyright 2015, Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
*
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package io.grpc;
/**
* A {@link ClientCall} which forwards all of it's methods to another {@link ClientCall}.
*/
public abstract class ForwardingClientCall extends ClientCall {
/**
* Returns the delegated {@code ClientCall}.
*/
protected abstract ClientCall delegate();
@Override
public void start(Listener responseListener, Metadata.Headers headers) {
delegate().start(responseListener, headers);
}
@Override
public void request(int numMessages) {
delegate().request(numMessages);
}
@Override
public void cancel() {
delegate().cancel();
}
@Override
public void halfClose() {
delegate().halfClose();
}
@Override
public void sendMessage(ReqT message) {
delegate().sendMessage(message);
}
@Override
public boolean isReady() {
return delegate().isReady();
}
/**
* A simplified version of {@link ForwardingClientCall} where subclasses can pass in a {@link
* ClientCall} as the delegate.
*/
public abstract static class SimpleForwardingClientCall
extends ForwardingClientCall {
private final ClientCall delegate;
protected SimpleForwardingClientCall(ClientCall delegate) {
this.delegate = delegate;
}
@Override
protected ClientCall delegate() {
return delegate;
}
}
}