| /* |
| * 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.harmony.nio.internal; |
| |
| import java.io.FileDescriptor; |
| import java.io.IOException; |
| import java.net.ServerSocket; |
| import java.net.Socket; |
| import java.net.SocketAddress; |
| import java.net.SocketImpl; |
| import java.net.SocketTimeoutException; |
| import java.nio.channels.ClosedChannelException; |
| import java.nio.channels.IllegalBlockingModeException; |
| import java.nio.channels.NotYetBoundException; |
| import java.nio.channels.ServerSocketChannel; |
| import java.nio.channels.SocketChannel; |
| import java.nio.channels.spi.SelectorProvider; |
| import org.apache.harmony.luni.net.PlainServerSocketImpl; |
| import org.apache.harmony.luni.platform.FileDescriptorHandler; |
| import org.apache.harmony.luni.platform.Platform; |
| |
| /** |
| * The default ServerSocketChannel. |
| */ |
| public final class ServerSocketChannelImpl |
| extends ServerSocketChannel implements FileDescriptorHandler { |
| |
| private final FileDescriptor fd = new FileDescriptor(); |
| private final SocketImpl impl = new PlainServerSocketImpl(fd); |
| private final ServerSocketAdapter socket = new ServerSocketAdapter(impl, this); |
| |
| private boolean isBound = false; |
| |
| private static class AcceptLock {} |
| private final Object acceptLock = new AcceptLock(); |
| |
| public ServerSocketChannelImpl(SelectorProvider sp) throws IOException { |
| super(sp); |
| } |
| |
| // for native call |
| @SuppressWarnings("unused") |
| private ServerSocketChannelImpl() throws IOException { |
| this(SelectorProvider.provider()); |
| } |
| |
| @Override public ServerSocket socket() { |
| return socket; |
| } |
| |
| @Override public SocketChannel accept() throws IOException { |
| if (!isOpen()) { |
| throw new ClosedChannelException(); |
| } |
| if (!isBound) { |
| throw new NotYetBoundException(); |
| } |
| |
| // TODO: pass in the SelectorProvider used to create this ServerSocketChannelImpl? |
| // Create an empty socket channel. This will be populated by ServerSocketAdapter.accept. |
| SocketChannelImpl result = new SocketChannelImpl(SelectorProvider.provider(), false); |
| Socket resultSocket = result.socket(); |
| |
| try { |
| begin(); |
| synchronized (acceptLock) { |
| synchronized (blockingLock()) { |
| boolean isBlocking = isBlocking(); |
| if (!isBlocking) { |
| int[] tryResult = new int[1]; |
| boolean success = Platform.getNetworkSystem().select( |
| new FileDescriptor[] { fd }, |
| new FileDescriptor[0], 1, 0, 0, tryResult); |
| if (!success || 0 == tryResult[0]) { |
| // no pending connections, returns immediately. |
| return null; |
| } |
| } |
| // do accept. |
| do { |
| try { |
| socket.accept(resultSocket, result); |
| // select successfully, break out immediately. |
| break; |
| } catch (SocketTimeoutException e) { |
| // continue to accept if the channel is in blocking mode. |
| } |
| } while (isBlocking); |
| } |
| } |
| } finally { |
| end(resultSocket.isConnected()); |
| } |
| return result; |
| } |
| |
| protected void implConfigureBlocking(boolean blockingMode) throws IOException { |
| // Do nothing here. For real accept() operation in non-blocking mode, |
| // it uses INetworkSystem.select. Whether a channel is blocking can be |
| // decided by isBlocking() method. |
| } |
| |
| synchronized protected void implCloseSelectableChannel() throws IOException { |
| if (!socket.isClosed()) { |
| socket.close(); |
| } |
| } |
| |
| public FileDescriptor getFD() { |
| return fd; |
| } |
| |
| private static class ServerSocketAdapter extends ServerSocket { |
| private final ServerSocketChannelImpl channelImpl; |
| |
| ServerSocketAdapter(SocketImpl impl, ServerSocketChannelImpl aChannelImpl) { |
| super(impl); |
| this.channelImpl = aChannelImpl; |
| } |
| |
| @Override public void bind(SocketAddress localAddress, int backlog) throws IOException { |
| super.bind(localAddress, backlog); |
| channelImpl.isBound = true; |
| } |
| |
| @Override public Socket accept() throws IOException { |
| if (!channelImpl.isBound) { |
| throw new IllegalBlockingModeException(); |
| } |
| SocketChannel sc = channelImpl.accept(); |
| if (null == sc) { |
| throw new IllegalBlockingModeException(); |
| } |
| return sc.socket(); |
| } |
| |
| private Socket accept(Socket socket, SocketChannelImpl sockChannel) throws IOException { |
| boolean connectOK = false; |
| try { |
| synchronized (this) { |
| super.implAccept(socket); |
| sockChannel.setConnected(); |
| sockChannel.setBound(true); |
| sockChannel.finishAccept(); |
| } |
| SecurityManager sm = System.getSecurityManager(); |
| if (sm != null) { |
| sm.checkAccept(socket.getInetAddress().getHostAddress(), socket.getPort()); |
| } |
| connectOK = true; |
| } finally { |
| if (!connectOK) { |
| socket.close(); |
| } |
| } |
| return socket; |
| } |
| |
| @Override public ServerSocketChannel getChannel() { |
| return channelImpl; |
| } |
| |
| @Override public boolean isBound() { |
| return channelImpl.isBound; |
| } |
| |
| @Override public void bind(SocketAddress localAddress) throws IOException { |
| super.bind(localAddress); |
| channelImpl.isBound = true; |
| } |
| |
| @Override public void close() throws IOException { |
| synchronized (channelImpl) { |
| if (channelImpl.isOpen()) { |
| channelImpl.close(); |
| } else { |
| super.close(); |
| } |
| } |
| } |
| } |
| } |