blitz_stable: src/com/go/trove/net/CheckedSocket.java comparison

comparison src/com/go/trove/net/CheckedSocket.java @ 0:3dc0c5604566

Initial checkin of blitz 2.0 fcs - no installer yet.

author	Dan Creswell <dan.creswell@gmail.com>
date	Sat, 21 Mar 2009 11:00:06 +0000
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--1:000000000000
+:3dc0c5604566
+/* ====================================================================
+* Trove - Copyright (c) 1997-2000 Walt Disney Internet Group
+* ====================================================================
+* The Tea Software License, Version 1.1
+*
+* Copyright (c) 2000 Walt Disney Internet Group. All rights reserved.
+*
+* Redistribution and use in source and binary forms, with or without
+* modification, are permitted provided that the following conditions
+* are met:
+*
+* 1. Redistributions of source code must retain the above copyright
+*    notice, this list of conditions and the following disclaimer.
+*
+* 2. Redistributions in binary form must reproduce the above copyright
+*    notice, this list of conditions and the following disclaimer in
+*    the documentation and/or other materials provided with the
+*    distribution.
+*
+* 3. The end-user documentation included with the redistribution,
+*    if any, must include the following acknowledgment:
+*       "This product includes software developed by the
+*        Walt Disney Internet Group (http://opensource.go.com/)."
+*    Alternately, this acknowledgment may appear in the software itself,
+*    if and wherever such third-party acknowledgments normally appear.
+*
+* 4. The names "Tea", "TeaServlet", "Kettle", "Trove" and "BeanDoc" must
+*    not be used to endorse or promote products derived from this
+*    software without prior written permission. For written
+*    permission, please contact opensource@dig.com.
+*
+* 5. Products derived from this software may not be called "Tea",
+*    "TeaServlet", "Kettle" or "Trove", nor may "Tea", "TeaServlet",
+*    "Kettle", "Trove" or "BeanDoc" appear in their name, without prior
+*    written permission of the Walt Disney Internet Group.
+*
+* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
+* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+* DISCLAIMED.  IN NO EVENT SHALL THE WALT DISNEY INTERNET GROUP OR ITS
+* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+* ====================================================================
+*
+* For more information about Tea, please see http://opensource.go.com/.
+*/
+package com.go.trove.net;
+import java.io.*;
+import java.net.*;
+import java.util.*;
+/******************************************************************************
+* A socket that tracks if any I/O exceptions have occured and ensures that
+* plain I/O exceptions are thrown as SocketExceptions. InterruptedIOExceptions
+* do not affect the exception count, and they are not converted to
+* SocketExceptions.
+* <p>
+* All socket exceptions thrown will actually be instances of
+* {@link CheckedSocketException}, which subclasses SocketException. The error
+* messages will contain additional information, and the original exception
+* and socket can be obtained from it.
+*
+* @author Brian S O'Neill
+* @version
+* <!--$$Revision: 1.1 $-->, <!--$$JustDate:--> 01/03/16 <!-- $-->
+*/
+public class CheckedSocket extends FilteredSocket {
+/**
+* Returns a new CheckedSocket instance only if the given socket isn't
+* already one.
+*/
+public static CheckedSocket check(Socket socket) throws SocketException {
+if (socket instanceof CheckedSocket) {
+return (CheckedSocket)socket;
+}
+else {
+return new CheckedSocket(socket);
+}
+}
+private int mExceptionCount;
+private InputStream mIn;
+private OutputStream mOut;
+private Set mExceptionListeners;
+protected CheckedSocket(Socket socket) throws SocketException {
+super(socket);
+}
+/**
+* Returns the total number of exceptions encountered while using this
+* socket, excluding InterruptedIOExceptions. If this count is not zero,
+* then the socket is potentially in an unrecoverable state.
+*/
+public int getExceptionCount() {
+return mExceptionCount;
+}
+/**
+* Internally, the collection of listeners is saved in a set so that
+* listener instances may be added multiple times without harm.
+*/
+public synchronized void addExceptionListener(ExceptionListener listener) {
+if (mExceptionListeners == null) {
+mExceptionListeners = new HashSet();
+}
+mExceptionListeners.add(listener);
+}
+public synchronized void removeExceptionListener(ExceptionListener listener) {
+if (mExceptionListeners != null) {
+mExceptionListeners.remove(listener);
+}
+}
+public synchronized InputStream getInputStream() throws IOException {
+if (mIn != null) {
+return mIn;
+}
+try {
+return mIn = new Input(super.getInputStream());
+}
+catch (Exception e) {
+throw handleIOException(e);
+}
+}
+public synchronized OutputStream getOutputStream() throws IOException {
+if (mOut != null) {
+return mOut;
+}
+try {
+return mOut = new Output(super.getOutputStream());
+}
+catch (Exception e) {
+throw handleIOException(e);
+}
+}
+public void setTcpNoDelay(boolean on) throws SocketException {
+try {
+super.setTcpNoDelay(on);
+}
+catch (Exception e) {
+throw handleSocketException(e);
+}
+}
+public boolean getTcpNoDelay() throws SocketException {
+try {
+return super.getTcpNoDelay();
+}
+catch (Exception e) {
+throw handleSocketException(e);
+}
+}
+public void setSoLinger(boolean on, int linger) throws SocketException {
+try {
+super.setSoLinger(on, linger);
+}
+catch (Exception e) {
+throw handleSocketException(e);
+}
+}
+public int getSoLinger() throws SocketException {
+try {
+return super.getSoLinger();
+}
+catch (Exception e) {
+throw handleSocketException(e);
+}
+}
+public void setSoTimeout(int timeout) throws SocketException {
+try {
+super.setSoTimeout(timeout);
+}
+catch (Exception e) {
+throw handleSocketException(e);
+}
+}
+public int getSoTimeout() throws SocketException {
+try {
+return super.getSoTimeout();
+}
+catch (Exception e) {
+throw handleSocketException(e);
+}
+}
+public void setSendBufferSize(int size) throws SocketException {
+try {
+super.setSendBufferSize(size);
+}
+catch (Exception e) {
+throw handleSocketException(e);
+}
+}
+public int getSendBufferSize() throws SocketException {
+try {
+return super.getSendBufferSize();
+}
+catch (Exception e) {
+throw handleSocketException(e);
+}
+}
+public void setReceiveBufferSize(int size) throws SocketException {
+try {
+super.setReceiveBufferSize(size);
+}
+catch (Exception e) {
+throw handleSocketException(e);
+}
+}
+public int getReceiveBufferSize() throws SocketException {
+try {
+return super.getReceiveBufferSize();
+}
+catch (Exception e) {
+throw handleSocketException(e);
+}
+}
+public void close() throws IOException {
+try {
+super.close();
+}
+catch (Exception e) {
+throw handleIOException(e);
+}
+}
+public void setKeepAlive(boolean on) throws SocketException {
+try {
+super.setKeepAlive(on);
+}
+catch (Exception e) {
+throw handleSocketException(e);
+}
+}
+public boolean getKeepAlive() throws SocketException {
+try {
+return super.getKeepAlive();
+}
+catch (Exception e) {
+throw handleSocketException(e);
+}
+}
+public void shutdownInput() throws IOException {
+try {
+super.shutdownInput();
+}
+catch (Exception e) {
+throw handleIOException(e);
+}
+}
+public void shutdownOutput() throws IOException {
+try {
+super.shutdownOutput();
+}
+catch (Exception e) {
+throw handleIOException(e);
+}
+}
+/**
+* @param e should be instance of IOException or RuntimeException.
+*/
+IOException handleIOException(Exception e) {
+if (e instanceof InterruptedIOException) {
+return CheckedInterruptedIOException.create
+((InterruptedIOException)e, mSocket);
+}
+int count;
+synchronized (this) {
+count = ++mExceptionCount;
+}
+exceptionOccurred(e, count);
+if (e instanceof CheckedSocketException) {
+return (CheckedSocketException)e;
+}
+else if (e instanceof NullPointerException) {
+// Workaround for a bug in the Socket class that sometimes
+// causes a NullPointerException on a closed socket.
+return CheckedSocketException.create(e, mSocket, "Socket closed");
+}
+else {
+return CheckedSocketException.create(e, mSocket);
+}
+}
+/**
+* @param e Should be instance of SocketException or RuntimeException.
+*/
+SocketException handleSocketException(Exception e) {
+int count;
+synchronized (this) {
+count = ++mExceptionCount;
+}
+exceptionOccurred(e, count);
+if (e instanceof CheckedSocketException) {
+return (CheckedSocketException)e;
+}
+else if (e instanceof NullPointerException) {
+// Workaround for a bug in the Socket class that sometimes
+// causes a NullPointerException on a closed socket.
+return CheckedSocketException.create(e, mSocket, "Socket closed");
+}
+else {
+return CheckedSocketException.create(e, mSocket);
+}
+}
+private synchronized void exceptionOccurred(Exception e, int count) {
+if (mExceptionListeners != null) {
+Iterator it = mExceptionListeners.iterator();
+while (it.hasNext()) {
+((ExceptionListener)it.next())
+.exceptionOccurred(this, e, count);
+}
+}
+}
+public static interface ExceptionListener {
+/**
+* @param count new exception count, which will be one the first time
+* this method is called.
+*/
+public void exceptionOccurred(CheckedSocket s, Exception e, int count);
+}
+private class Input extends InputStream {
+private final InputStream mStream;
+public Input(InputStream in) {
+mStream = in;
+}
+public int read() throws IOException {
+try {
+return mStream.read();
+}
+catch (IOException e) {
+throw handleIOException(e);
+}
+}
+public int read(byte[] b) throws IOException {
+try {
+return mStream.read(b);
+}
+catch (IOException e) {
+throw handleIOException(e);
+}
+}
+public int read(byte[] b, int off, int len) throws IOException {
+try {
+return mStream.read(b, off, len);
+}
+catch (IOException e) {
+throw handleIOException(e);
+}
+}
+public long skip(long n) throws IOException {
+try {
+return mStream.skip(n);
+}
+catch (IOException e) {
+throw handleIOException(e);
+}
+}
+public int available() throws IOException {
+try {
+return mStream.available();
+}
+catch (IOException e) {
+throw handleIOException(e);
+}
+}
+public void close() throws IOException {
+try {
+mStream.close();
+}
+catch (IOException e) {
+throw handleIOException(e);
+}
+}
+public void mark(int readlimit) {
+mStream.mark(readlimit);
+}
+public void reset() throws IOException {
+try {
+mStream.reset();
+}
+catch (IOException e) {
+throw handleIOException(e);
+}
+}
+public boolean markSupported() {
+return mStream.markSupported();
+}
+}
+private class Output extends OutputStream {
+private final OutputStream mStream;
+public Output(OutputStream out) {
+mStream = out;
+}
+public void write(int b) throws IOException {
+try {
+mStream.write(b);
+}
+catch (IOException e) {
+throw handleIOException(e);
+}
+}
+public void write(byte[] b) throws IOException {
+try {
+mStream.write(b);
+}
+catch (IOException e) {
+throw handleIOException(e);
+}
+}
+public void write(byte[] b, int off, int len) throws IOException {
+try {
+mStream.write(b, off, len);
+}
+catch (IOException e) {
+throw handleIOException(e);
+}
+}
+public void flush() throws IOException {
+try {
+mStream.flush();
+}
+catch (IOException e) {
+throw handleIOException(e);
+}
+}
+public void close() throws IOException {
+try {
+mStream.close();
+}
+catch (IOException e) {
+throw handleIOException(e);
+}
+}
+}
+}

Mercurial > hg > blitz_stable

comparison src/com/go/trove/net/CheckedSocket.java @ 0:3dc0c5604566