| /* |
| * 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.axis2.transport.testkit.util; |
| |
| import java.io.IOException; |
| import java.net.ServerSocket; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.axis2.transport.testkit.tests.Setup; |
| import org.apache.axis2.transport.testkit.tests.TearDown; |
| |
| public class PortAllocator { |
| private static final int BASE_PORT = 9000; |
| private static final int BASE_PORT_INCREMENT = 10; |
| |
| public static final PortAllocator INSTANCE = new PortAllocator(); |
| |
| static class PortRange { |
| private final ServerSocket serverSocket; |
| private final int basePort; |
| private final boolean[] allocated = new boolean[BASE_PORT_INCREMENT-1]; |
| |
| PortRange(ServerSocket serverSocket) { |
| this.serverSocket = serverSocket; |
| basePort = serverSocket.getLocalPort(); |
| } |
| |
| /** |
| * Allocate a port in this range. |
| * |
| * @return the allocated port, or -1 if there are no more available ports |
| */ |
| int allocatePort() { |
| for (int i=0; i<BASE_PORT_INCREMENT-1; i++) { |
| if (!allocated[i]) { |
| allocated[i] = true; |
| return basePort + i + 1; |
| } |
| } |
| return -1; |
| } |
| |
| /** |
| * Determine if the given port belongs to the range. |
| * |
| * @return <code>true</code> if the port belongs to the range; <code>false</code> otherwise |
| */ |
| boolean hasPort(int port) { |
| return port > basePort && port < basePort + BASE_PORT_INCREMENT; |
| } |
| |
| /** |
| * Release the given port. |
| * |
| * @param port the number of the port to release |
| */ |
| void releasePort(int port) { |
| int i = port - basePort - 1; |
| if (!allocated[i]) { |
| throw new IllegalStateException("Port is not allocated"); |
| } |
| allocated[i] = false; |
| } |
| |
| void release() { |
| try { |
| serverSocket.close(); |
| } catch (IOException ex) { |
| // Ignore |
| } |
| } |
| } |
| |
| private int basePort; |
| private List<PortRange> ranges; |
| |
| private PortAllocator() { |
| } |
| |
| @Setup @SuppressWarnings("unused") |
| private void setUp() { |
| basePort = BASE_PORT; |
| ranges = new ArrayList<PortRange>(); |
| } |
| |
| @TearDown @SuppressWarnings("unused") |
| private void tearDown() throws Exception { |
| for (PortRange range : ranges) { |
| range.release(); |
| } |
| ranges = null; |
| } |
| |
| public synchronized int allocatePort() { |
| for (PortRange range : ranges) { |
| int port = range.allocatePort(); |
| if (port != -1) { |
| return port; |
| } |
| } |
| while (true) { |
| ServerSocket serverSocket; |
| try { |
| serverSocket = new ServerSocket(basePort); |
| } catch (IOException ex) { |
| serverSocket = null; |
| } |
| basePort += BASE_PORT_INCREMENT; |
| if (serverSocket != null) { |
| PortRange range = new PortRange(serverSocket); |
| ranges.add(range); |
| return range.allocatePort(); |
| } |
| } |
| } |
| |
| public synchronized void releasePort(int port) { |
| for (PortRange range : ranges) { |
| if (range.hasPort(port)) { |
| range.releasePort(port); |
| return; |
| } |
| } |
| throw new IllegalArgumentException("Invalid port number"); |
| } |
| } |