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package com.sun.enterprise.web.connector.grizzly;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.SelectionKey;
import java.nio.channels.Selector;
import java.nio.channels.SocketChannel;
import java.util.logging.Level;
/**
* NIO utility to flush ByteBuffer
*
* @author Scott Oaks
*/
public class OutputWriter {
/**
* The default rime out before closing the connection
*/
private static int defaultWriteTimeout = 30000;
/**
* Flush the buffer by looping until the ByteBuffer is empty
* @param bb the ByteBuffer to write.
*/
public static long flushChannel(SocketChannel socketChannel, ByteBuffer bb)
throws IOException{
return flushChannel(socketChannel,bb,defaultWriteTimeout);
}
/**
* Flush the buffer by looping until the ByteBuffer is empty
* @param bb the ByteBuffer to write.
*/
public static long flushChannel(SocketChannel socketChannel,
ByteBuffer bb, long writeTimeout) throws IOException{
if (bb == null || socketChannel == null){
if (SelectorThread.logger().isLoggable(Level.FINE)){
SelectorThread.logger().log(Level.FINE,"Invalid Response State " + bb
+ "SocketChannel cannot be null." + socketChannel);
}
return -1;
}
SelectionKey key = null;
Selector writeSelector = null;
int attempts = 0;
int nWrite = 0;
int len = -1;
long elapsedTime = 0;
try {
while ( bb.hasRemaining() ) {
len = socketChannel.write(bb);
if (len > 0){
attempts = 0;
elapsedTime = 0;
nWrite += len;
} else {
attempts++;
if (writeSelector == null) {
writeSelector = SelectorFactory.getSelector();
if (writeSelector == null) {
// Continue using the main one.
continue;
}
key = socketChannel.register(writeSelector,
SelectionKey.OP_WRITE);
} else {
writeSelector.selectedKeys().clear();
}
long startTime = System.currentTimeMillis();
if (writeSelector.select(writeTimeout) == 0) {
elapsedTime += (System.currentTimeMillis() - startTime);
if (attempts > 2 && ( writeTimeout > 0 && elapsedTime >= writeTimeout ) )
throw new IOException("Client is busy or timed out");
}
}
}
} finally {
if (key != null) {
key.cancel();
key = null;
}
if ( writeSelector != null ) {
// Cancel the key.
SelectorFactory.selectNowAndReturnSelector(writeSelector);
}
}
return nWrite;
}
/**
* Flush the buffer by looping until the ByteBuffer is empty
* @param bb the ByteBuffer to write.
*/
public static long flushChannel(SocketChannel socketChannel, ByteBuffer[] bb)
throws IOException{
return flushChannel(socketChannel,bb,defaultWriteTimeout);
}
/**
* Flush the buffer by looping until the ByteBuffer is empty
* @param bb the ByteBuffer to write.
*/
public static long flushChannel(SocketChannel socketChannel,
ByteBuffer[] bb, long writeTimeout) throws IOException{
if (bb == null || socketChannel == null){
if (SelectorThread.logger().isLoggable(Level.FINE)){
SelectorThread.logger().log(Level.FINE,"Invalid Response State " + bb
+ "SocketChannel cannot be null." + socketChannel);
}
return -1;
}
SelectionKey key = null;
Selector writeSelector = null;
int attempts = 0;
long totalBytes = 0;
for (int i=0;i 0){
attempts = 0;
elapsedTime = 0;
nWrite += len;
} else {
if (writeSelector == null) {
writeSelector = SelectorFactory.getSelector();
if (writeSelector == null) {
// Continue using the main one.
continue;
}
} else {
writeSelector.selectedKeys().clear();
}
key = socketChannel.register(writeSelector,
SelectionKey.OP_WRITE);
long startTime = System.currentTimeMillis();
if (writeSelector.select(writeTimeout) == 0) {
elapsedTime += (System.currentTimeMillis() - startTime);
if (attempts > 2 && ( writeTimeout > 0 && elapsedTime >= writeTimeout ) )
throw new IOException("Client is busy or timed out");
}
}
}
} finally {
if (key != null) {
key.cancel();
key = null;
}
if ( writeSelector != null ) {
// Cancel the key.
SelectorFactory.selectNowAndReturnSelector(writeSelector);
}
}
return nWrite;
}
public static int getDefaultWriteTimeout() {
return defaultWriteTimeout;
}
public static void setDefaultWriteTimeout(int aDefaultWriteTimeout) {
defaultWriteTimeout = aDefaultWriteTimeout;
}
}