io.grpc.ForwardingClientCallListener Maven / Gradle / Ivy
/*
* Copyright 2015, gRPC Authors All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.grpc;
/**
* A {@link ClientCall.Listener} which forwards all of its methods to another {@link
* ClientCall.Listener}.
*/
public abstract class ForwardingClientCallListener
extends PartialForwardingClientCallListener {
/**
* Returns the delegated {@code ClientCall.Listener}.
*/
@Override
protected abstract ClientCall.Listener delegate();
@Override
public void onMessage(RespT message) {
delegate().onMessage(message);
}
/**
* A simplified version of {@link ForwardingClientCallListener} where subclasses can pass in a
* {@link ClientCall.Listener} as the delegate.
*/
public abstract static class SimpleForwardingClientCallListener
extends ForwardingClientCallListener {
private final ClientCall.Listener delegate;
protected SimpleForwardingClientCallListener(ClientCall.Listener delegate) {
this.delegate = delegate;
}
@Override
protected ClientCall.Listener delegate() {
return delegate;
}
}
}