| /* |
| * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| import java.io.*; |
| import java.net.BindException; |
| import java.net.InetSocketAddress; |
| import java.net.ProtocolFamily; |
| import java.nio.channels.Channel; |
| import java.nio.channels.DatagramChannel; |
| import java.nio.channels.Pipe; |
| import java.nio.channels.ServerSocketChannel; |
| import java.nio.channels.SocketChannel; |
| import java.nio.channels.spi.AbstractSelector; |
| import java.nio.channels.spi.SelectorProvider; |
| import java.time.LocalTime; |
| import static java.net.StandardSocketOptions.SO_REUSEADDR; |
| import static java.net.StandardSocketOptions.SO_REUSEPORT; |
| |
| /** |
| * A SelectorProvider, that can be loaded by the child rmid process, whose |
| * inheritedChannel method will create a new server socket channel and report |
| * it back to the parent process, over stdout. |
| */ |
| public class RMIDSelectorProvider extends SelectorProvider { |
| |
| private final SelectorProvider provider; |
| private ServerSocketChannel channel; |
| |
| public RMIDSelectorProvider() { |
| provider = sun.nio.ch.DefaultSelectorProvider.create(); |
| } |
| |
| public DatagramChannel openDatagramChannel() |
| throws IOException |
| { |
| return provider.openDatagramChannel(); |
| } |
| |
| public DatagramChannel openDatagramChannel(ProtocolFamily family) |
| throws IOException |
| { |
| return provider.openDatagramChannel(family); |
| } |
| |
| public Pipe openPipe() |
| throws IOException |
| { |
| return provider.openPipe(); |
| } |
| |
| public AbstractSelector openSelector() |
| throws IOException |
| { |
| return provider.openSelector(); |
| } |
| |
| public ServerSocketChannel openServerSocketChannel() |
| throws IOException |
| { |
| return provider.openServerSocketChannel(); |
| } |
| |
| public SocketChannel openSocketChannel() |
| throws IOException |
| { |
| return provider.openSocketChannel(); |
| } |
| |
| public synchronized Channel inheritedChannel() throws IOException { |
| System.out.println("RMIDSelectorProvider.inheritedChannel"); |
| if (channel == null) { |
| // Create and bind a new server socket channel |
| channel = ServerSocketChannel.open(); |
| |
| // Enable SO_REUSEADDR before binding |
| channel.setOption(SO_REUSEADDR, true); |
| |
| // Enable SO_REUSEPORT, if supported, before binding |
| if (channel.supportedOptions().contains(SO_REUSEPORT)) { |
| channel.setOption(SO_REUSEPORT, true); |
| } |
| |
| // when it comes here, these properties should have been set with |
| // a valid value, but assign a default value anyway. |
| long timeout = Long.getLong( |
| "test.java.rmi.testlibrary.RMIDSelectorProvider.timeout", |
| 200_000); |
| long deadline = System.currentTimeMillis() + timeout; |
| int port = Integer.getInteger( |
| "test.java.rmi.testlibrary.RMIDSelectorProvider.port", 0); |
| while (true) { |
| try { |
| channel.bind(new InetSocketAddress(port)); |
| break; |
| } catch (BindException ex) { |
| System.out.format("RMIDSelectorProvider: " |
| + "failed to bind to port %d due to \"%s\", at %s%n", |
| port, ex.getMessage(), LocalTime.now()); |
| } |
| if (System.currentTimeMillis() > deadline) { |
| System.out.format("RMIDSelectorProvider: " |
| + "fail to bind to port %d after trying for " |
| + "%d seconds, exiting rmid process, at %s%n", |
| port, timeout/1000, LocalTime.now()); |
| channel.close(); |
| // can not start rmid on specific port, |
| // there is no need to continue run rmid. |
| System.exit(1); |
| } |
| try { |
| Thread.sleep(1000); |
| } catch(InterruptedException ignore) { } |
| } |
| |
| System.out.println(RMID.EPHEMERAL_MSG + channel.socket().getLocalPort()); |
| } |
| return channel; |
| } |
| } |