/*
* @(#)$Id$
*
* Copyright 2006-2008 Makoto YUI
*
* Licensed 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.
*
* Contributors:
* Makoto YUI - initial implementation
*/
package xbird.util.net;
import java.io.IOException;
import java.io.InterruptedIOException;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.SocketAddress;
import java.net.SocketTimeoutException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
*
* <DIV lang="en"></DIV>
* <DIV lang="ja"></DIV>
*
* @author Makoto YUI (yuin405+xbird@gmail.com)
*/
public final class SocketUtils {
private static final Log LOG = LogFactory.getLog(SocketUtils.class);
private static final long POLL_DELAY = 2000L;
private SocketUtils() {}
public static Socket openSocket(InetAddress addr, int port, int connectTimeout, long pollDelay, int maxRetry)
throws IOException {
SocketAddress sockAddr = new InetSocketAddress(addr, port);
return openSocket(sockAddr, connectTimeout, pollDelay, maxRetry);
}
public static Socket openSocket(String host, int port, int connectTimeout, long pollDelay, int maxRetry)
throws IOException {
SocketAddress sockAddr = new InetSocketAddress(host, port);
return openSocket(sockAddr, connectTimeout, pollDelay, maxRetry);
}
public static Socket openSocket(SocketAddress sockAddr, int connectTimeout) throws IOException {
return openSocket(sockAddr, connectTimeout, POLL_DELAY, 1);
}
public static Socket openSocket(SocketAddress sockAddr, int connectTimeout, int maxRetry)
throws IOException {
return openSocket(sockAddr, connectTimeout, POLL_DELAY, maxRetry);
}
public static Socket openSocket(SocketAddress sockAddr, int connectTimeout, long pollDelay, int maxRetry)
throws IOException {
Socket socket = new Socket();
return openSocket(socket, sockAddr, connectTimeout, pollDelay, maxRetry);
}
/**
* @param connectTimeout A timeout of zero is interpreted as an infinite timeout.
* @param pollDelay sleep in mills before retry.
* @param maxRetry No-retry if the value is 1.
*/
public static Socket openSocket(Socket socket, SocketAddress sockAddr, int connectTimeout, long pollDelay, int maxRetry)
throws IOException {
assert (sockAddr != null);
assert (pollDelay >= 0) : pollDelay;
assert (maxRetry > 0) : maxRetry;
for(int i = 0; i < maxRetry; i++) {
try {
socket.connect(sockAddr, connectTimeout);
} catch (SocketTimeoutException ste) {
if(LOG.isWarnEnabled()) {
LOG.warn("Socket.connect to " + sockAddr + " timeout #" + (i + 1));
}
} catch (IOException e) {
if(LOG.isWarnEnabled()) {
LOG.warn("Socket.connect to " + sockAddr + " failed #" + (i + 1), e);
}
} catch (Throwable e) {
LOG.fatal("failed to connect: " + sockAddr, e);
throw new IOException(e);
}
if(socket.isConnected()) {
return socket;
}
if(pollDelay > 0) {
try {
Thread.sleep(pollDelay);
} catch (InterruptedException ie) {
;
}
}
}
throw new InterruptedIOException("Could not connect to " + sockAddr);
}
public static boolean write(final Socket socket, final byte[] b, final long delay, final int maxRetry)
throws IOException {
final OutputStream sockout = socket.getOutputStream();
for(int i = 0; i < maxRetry; i++) {
try {
sockout.write(b);
sockout.flush();
return true;
} catch (IOException e) {
if(LOG.isWarnEnabled()) {
LOG.warn("Failed to write to socket: " + socket.getRemoteSocketAddress() + " #"
+ i);
}
}
if(delay > 0) {
try {
Thread.sleep(delay);
} catch (InterruptedException ie) {
;
}
}
}
if(LOG.isWarnEnabled()) {
LOG.warn("Failed to write to socket: " + socket.getRemoteSocketAddress());
}
return false;
}
}