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package com.sun.xml.ws.transport.tcp.io;
import com.sun.xml.ws.transport.tcp.resources.MessagesMessages;
import com.sun.xml.ws.transport.tcp.util.DumpUtils;
import com.sun.xml.ws.transport.tcp.util.SelectorFactory;
import java.io.EOFException;
import java.io.IOException;
import java.net.Socket;
import java.nio.ByteBuffer;
import java.nio.channels.SelectionKey;
import java.nio.channels.Selector;
import java.nio.channels.SocketChannel;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* NIO utility to flush <code>ByteBuffer</code>
*
* @author Scott Oaks
* @author Alexey Stashok
*/
public final class OutputWriter {
private static final Logger logger = Logger.getLogger(
com.sun.xml.ws.transport.tcp.util.TCPConstants.LoggingDomain + ".dump");
/**
* Flush the buffer by looping until the <code>ByteBuffer</code> is empty
* @param bb the ByteBuffer to write.
*/
public static void flushChannel(final SocketChannel socketChannel, final ByteBuffer bb)
throws IOException{
if (logger.isLoggable(Level.FINEST)) {
Socket socket = socketChannel.socket();
logger.log(Level.FINEST, MessagesMessages.WSTCP_1070_OUTPUT_WRITER_DUMP(socket.getInetAddress().getHostAddress(), socketChannel.socket().getPort()));
logger.log(Level.FINEST, DumpUtils.dumpBytes(bb));
}
SelectionKey key = null;
Selector writeSelector = null;
int attempts = 0;
try {
while ( bb.hasRemaining() ) {
final int len = socketChannel.write(bb);
attempts++;
if (len < 0){
throw new EOFException();
}
if (len == 0) {
if ( writeSelector == null ){
writeSelector = SelectorFactory.getSelector();
if ( writeSelector == null){
// Continue using the main one.
continue;
}
}
key = socketChannel.register(writeSelector, key.OP_WRITE);
if (writeSelector.select(30 * 1000) == 0) {
if (attempts > 2) {
Socket socket = socketChannel.socket();
throw new IOException(MessagesMessages.WSTCP_0019_PEER_DISCONNECTED(socket.getInetAddress().getHostAddress(), socketChannel.socket().getPort()));
}
} else {
attempts--;
}
} else {
attempts = 0;
}
}
} finally {
if (key != null) {
key.cancel();
key = null;
}
if ( writeSelector != null ) {
// Cancel the key.
writeSelector.selectNow();
SelectorFactory.returnSelector(writeSelector);
}
}
}
/**
* Flush the buffer by looping until the <code>ByteBuffer</code> is empty
* @param bb the ByteBuffer to write.
*/
public static void flushChannel(final SocketChannel socketChannel, final ByteBuffer[] bb)
throws IOException{
if (logger.isLoggable(Level.FINEST)) {
Socket socket = socketChannel.socket();
logger.log(Level.FINEST, MessagesMessages.WSTCP_1070_OUTPUT_WRITER_DUMP(socket.getInetAddress().getHostAddress(), socketChannel.socket().getPort()));
logger.log(Level.FINEST, DumpUtils.dumpBytes(bb));
}
SelectionKey key = null;
Selector writeSelector = null;
int attempts = 0;
try {
while (hasRemaining(bb)) {
final long len = socketChannel.write(bb);
attempts++;
if (len < 0){
throw new EOFException();
}
if (len == 0) {
if ( writeSelector == null ){
writeSelector = SelectorFactory.getSelector();
if ( writeSelector == null){
// Continue using the main one.
continue;
}
}
key = socketChannel.register(writeSelector, key.OP_WRITE);
if (writeSelector.select(30 * 1000) == 0) {
if (attempts > 2) {
Socket socket = socketChannel.socket();
throw new IOException(MessagesMessages.WSTCP_0019_PEER_DISCONNECTED(socket.getInetAddress().getHostAddress(), socketChannel.socket().getPort()));
}
} else {
attempts--;
}
} else {
attempts = 0;
}
}
} finally {
if (key != null) {
key.cancel();
key = null;
}
if ( writeSelector != null ) {
// Cancel the key.
writeSelector.selectNow();
SelectorFactory.returnSelector(writeSelector);
}
}
}
private static boolean hasRemaining(final ByteBuffer[] bb) {
for(int i=bb.length - 1; i>=0; i--) {
if (bb[i].hasRemaining()) {
return true;
}
}
return false;
}
}
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