| /* |
| * 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.beam.runners.extensions.metrics; |
| |
| import java.io.BufferedReader; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| import java.net.ServerSocket; |
| import java.net.Socket; |
| import java.nio.charset.Charset; |
| import java.util.Collection; |
| import java.util.concurrent.CopyOnWriteArrayList; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| |
| /** Mock of a network server. */ |
| class NetworkMockServer { |
| private final int port; |
| private ServerSocket serverSocket; |
| private ServerThread thread; |
| private CountDownLatch countDownLatch; |
| |
| private Collection<String> messages = new CopyOnWriteArrayList<String>(); |
| |
| public NetworkMockServer(final int port) { |
| this.port = port; |
| } |
| |
| public void setCountDownLatch(CountDownLatch countDownLatch) { |
| this.countDownLatch = countDownLatch; |
| } |
| |
| public NetworkMockServer start() throws IOException { |
| serverSocket = new ServerSocket(port); |
| thread = new ServerThread(serverSocket, messages); |
| thread.start(); |
| return this; |
| } |
| |
| public void stop() throws IOException { |
| thread.shutdown(); |
| serverSocket.close(); |
| } |
| |
| public Collection<String> getMessages() { |
| return messages; |
| } |
| |
| public void clear() { |
| messages.clear(); |
| } |
| |
| private class ServerThread extends Thread { |
| private final Collection<String> messages; |
| |
| private final AtomicBoolean done = new AtomicBoolean(false); |
| private final ServerSocket server; |
| |
| public ServerThread(final ServerSocket server, final Collection<String> messages) { |
| this.messages = messages; |
| this.server = server; |
| setName("network-mock-server"); |
| } |
| |
| @Override |
| public void run() { |
| while (!done.get()) { |
| try { |
| final Socket s = server.accept(); |
| synchronized (this) { |
| final InputStream is = s.getInputStream(); |
| final BufferedReader reader = |
| new BufferedReader(new InputStreamReader(is, Charset.forName("UTF-8"))); |
| String line; |
| |
| try { |
| while ((line = reader.readLine()) != null) { |
| messages.add(line); |
| } |
| } finally { |
| countDownLatch.countDown(); |
| s.close(); |
| } |
| } |
| } catch (final IOException e) { |
| if (!done.get()) { |
| throw new RuntimeException(e); |
| } |
| } |
| } |
| } |
| |
| public void shutdown() { |
| done.set(true); |
| } |
| } |
| } |