| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 org.apache.dubbo.rpc; |
| |
| import java.util.concurrent.CompletableFuture; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| |
| public class AsyncContextImpl implements AsyncContext { |
| |
| private final AtomicBoolean started = new AtomicBoolean(false); |
| private final AtomicBoolean stopped = new AtomicBoolean(false); |
| |
| private CompletableFuture<Object> future; |
| |
| private RpcContext storedContext; |
| private RpcContext storedServerContext; |
| |
| public AsyncContextImpl() { |
| this.storedContext = RpcContext.getContext(); |
| this.storedServerContext = RpcContext.getServerContext(); |
| } |
| |
| @Override |
| public void write(Object value) { |
| if (isAsyncStarted() && stop()) { |
| if (value instanceof Throwable) { |
| Throwable bizExe = (Throwable) value; |
| future.completeExceptionally(bizExe); |
| } else { |
| future.complete(value); |
| } |
| } else { |
| throw new IllegalStateException("The async response has probably been wrote back by another thread, or the asyncContext has been closed."); |
| } |
| } |
| |
| @Override |
| public boolean isAsyncStarted() { |
| return started.get(); |
| } |
| |
| @Override |
| public boolean stop() { |
| return stopped.compareAndSet(false, true); |
| } |
| |
| @Override |
| public void start() { |
| if (this.started.compareAndSet(false, true)) { |
| this.future = new CompletableFuture<>(); |
| } |
| } |
| |
| @Override |
| public void signalContextSwitch() { |
| RpcContext.restoreContext(storedContext); |
| RpcContext.restoreServerContext(storedServerContext); |
| // Restore any other contexts in here if necessary. |
| } |
| |
| public CompletableFuture<Object> getInternalFuture() { |
| return future; |
| } |
| } |