| /* |
| * 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; |
| |
| import javax.annotation.Nullable; |
| |
| /** |
| * A {@link ClientCall} which forwards all of it's methods to another {@link ClientCall}. |
| */ |
| public abstract class ForwardingClientCall<ReqT, RespT> extends ClientCall<ReqT, RespT> { |
| /** |
| * Returns the delegated {@code ClientCall}. |
| */ |
| protected abstract ClientCall<ReqT, RespT> delegate(); |
| |
| @Override |
| public void start(Listener<RespT> responseListener, Metadata headers) { |
| delegate().start(responseListener, headers); |
| } |
| |
| @Override |
| public void request(int numMessages) { |
| delegate().request(numMessages); |
| } |
| |
| @Override |
| public void cancel(@Nullable String message, @Nullable Throwable cause) { |
| delegate().cancel(message, cause); |
| } |
| |
| @Override |
| public void halfClose() { |
| delegate().halfClose(); |
| } |
| |
| @Override |
| public void sendMessage(ReqT message) { |
| delegate().sendMessage(message); |
| } |
| |
| @Override |
| public void setMessageCompression(boolean enabled) { |
| delegate().setMessageCompression(enabled); |
| } |
| |
| @Override |
| public boolean isReady() { |
| return delegate().isReady(); |
| } |
| |
| @Override |
| public Attributes getAttributes() { |
| return delegate().getAttributes(); |
| } |
| |
| /** |
| * A simplified version of {@link ForwardingClientCall} where subclasses can pass in a {@link |
| * ClientCall} as the delegate. |
| */ |
| public abstract static class SimpleForwardingClientCall<ReqT, RespT> |
| extends ForwardingClientCall<ReqT, RespT> { |
| private final ClientCall<ReqT, RespT> delegate; |
| |
| protected SimpleForwardingClientCall(ClientCall<ReqT, RespT> delegate) { |
| this.delegate = delegate; |
| } |
| |
| @Override |
| protected ClientCall<ReqT, RespT> delegate() { |
| return delegate; |
| } |
| } |
| } |