author | martin |
Tue, 15 Sep 2015 21:56:04 -0700 | |
changeset 32649 | 2ee9017c7597 |
parent 29920 | f81c14f472ab |
child 34716 | 7477a052aecc |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1995, 2011, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package sun.net; |
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import java.io.*; |
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import java.net.Socket; |
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import java.net.ServerSocket; |
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import sun.misc.ManagedLocalsThread; |
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/** |
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* This is the base class for network servers. To define a new type |
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* of server define a new subclass of NetworkServer with a serviceRequest |
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* method that services one request. Start the server by executing: |
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* <pre> |
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* new MyServerClass().startServer(port); |
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* </pre> |
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*/ |
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public class NetworkServer implements Runnable, Cloneable { |
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/** Socket for communicating with client. */ |
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public Socket clientSocket = null; |
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private Thread serverInstance; |
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private ServerSocket serverSocket; |
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/** Stream for printing to the client. */ |
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public PrintStream clientOutput; |
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/** Buffered stream for reading replies from client. */ |
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public InputStream clientInput; |
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/** Close an open connection to the client. */ |
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public void close() throws IOException { |
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clientSocket.close(); |
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clientSocket = null; |
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clientInput = null; |
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clientOutput = null; |
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} |
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/** Return client connection status */ |
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public boolean clientIsOpen() { |
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return clientSocket != null; |
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} |
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public final void run() { |
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if (serverSocket != null) { |
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Thread.currentThread().setPriority(Thread.MAX_PRIORITY); |
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// System.out.print("Server starts " + serverSocket + "\n"); |
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while (true) { |
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try { |
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Socket ns = serverSocket.accept(); |
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// System.out.print("New connection " + ns + "\n"); |
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NetworkServer n = (NetworkServer)clone(); |
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n.serverSocket = null; |
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n.clientSocket = ns; |
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new ManagedLocalsThread(n).start(); |
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} catch(Exception e) { |
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System.out.print("Server failure\n"); |
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e.printStackTrace(); |
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try { |
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serverSocket.close(); |
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} catch(IOException e2) {} |
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System.out.print("cs="+serverSocket+"\n"); |
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break; |
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} |
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} |
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// close(); |
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} else { |
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try { |
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clientOutput = new PrintStream( |
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new BufferedOutputStream(clientSocket.getOutputStream()), |
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false, "ISO8859_1"); |
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clientInput = new BufferedInputStream(clientSocket.getInputStream()); |
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serviceRequest(); |
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// System.out.print("Service handler exits |
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// "+clientSocket+"\n"); |
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} catch(Exception e) { |
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// System.out.print("Service handler failure\n"); |
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// e.printStackTrace(); |
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} |
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try { |
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close(); |
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} catch(IOException e2) {} |
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} |
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} |
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/** Start a server on port <i>port</i>. It will call serviceRequest() |
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for each new connection. */ |
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public final void startServer(int port) throws IOException { |
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serverSocket = new ServerSocket(port, 50); |
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serverInstance = new ManagedLocalsThread(this); |
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serverInstance.start(); |
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} |
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/** Service one request. It is invoked with the clientInput and |
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clientOutput streams initialized. This method handles one client |
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connection. When it is done, it can simply exit. The default |
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server just echoes it's input. It is invoked in it's own private |
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thread. */ |
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public void serviceRequest() throws IOException { |
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byte buf[] = new byte[300]; |
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int n; |
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clientOutput.print("Echo server " + getClass().getName() + "\n"); |
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clientOutput.flush(); |
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while ((n = clientInput.read(buf, 0, buf.length)) >= 0) { |
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clientOutput.write(buf, 0, n); |
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} |
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} |
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public static void main(String argv[]) { |
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try { |
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new NetworkServer ().startServer(8888); |
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} catch (IOException e) { |
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System.out.print("Server failed: "+e+"\n"); |
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} |
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} |
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/** |
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* Clone this object; |
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*/ |
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public Object clone() { |
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try { |
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return super.clone(); |
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} catch (CloneNotSupportedException e) { |
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// this shouldn't happen, since we are Cloneable |
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throw new InternalError(e); |
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} |
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} |
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public NetworkServer () { |
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} |
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} |