com.sun.grizzly.util.InputReader Maven / Gradle / Ivy
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package com.sun.grizzly.util;
import java.io.InputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.SelectionKey;
import java.nio.channels.SocketChannel;
/**
* This class implement IO stream operations on top of a {@link ByteBuffer}.
* Under the hood, this class use a temporary Selector pool for reading
* bytes when the client ask for more and the current Selector is not yet ready.
*
* @author Jeanfrancois Arcand
*/
public class InputReader extends InputStream {
/**
* The {@link Channel} type is used to avoid invoking the instanceof
* operation when registering the Socket|Datagram Channel to the Selector.
*/
public enum ChannelType { SocketChannel, DatagramChannel }
/**
* By default this class will cast the Channel to a SocketChannel.
*/
private ChannelType defaultChannelType = ChannelType.SocketChannel;
private static int defaultReadTimeout = 30000;
/**
* The wrapped ByteBuffer byteBuffer.remaining()) {
length = byteBuffer.remaining();
}
byteBuffer.get(b, offset, length);
return (length);
}
/**
* Read the bytes of the wrapped {@link ByteBuffer}.
* @param bb {@link ByteBuffer}
* @return - number of bytes read
* @throws java.io.IOException
*/
public int read(ByteBuffer bb) throws IOException {
//Switch Buffer
ByteBuffer oldBB = byteBuffer;
byteBuffer = bb;
int initialPosition = bb.position();
int eof = doRead();
if (eof <= 0){
return -1;
}
// Back to the default one.
byteBuffer = oldBB;
// Calculate the number of bytes were read
int bytesRead = bb.limit() - initialPosition;
return bytesRead;
}
/**
* Recycle this object.
*/
public void recycle(){
byteBuffer = null;
key = null;
}
/**
* Set the {@link SelectionKey} used to reads bytes.
* @param key {@link SelectionKey}
*/
public void setSelectionKey(SelectionKey key){
this.key = key;
}
/**
* Read bytes using the read ReadSelector
* @return - number of bytes read
* @throws java.io.IOException
*/
protected int doRead() throws IOException{
if ( key == null ) return -1;
if (secure){
return doSecureRead();
} else {
return doClearRead();
}
}
/**
* Read and decrypt bytes from the underlying SSL connections. All
* the SSLEngine operations are delegated to class {@link SSLUtils}.
* @return number of bytes read
* @throws java.io.IOException
*/
protected int doSecureRead() throws IOException{
final WorkerThread workerThread =
(WorkerThread)Thread.currentThread();
int bytesRead = SSLUtils.doSecureRead((SocketChannel) key.channel(),
workerThread.getSSLEngine(), byteBuffer,
workerThread.getInputBB());
byteBuffer.flip();
return bytesRead;
}
protected int doClearRead() throws IOException{
int bytesRead = Utils.readWithTemporarySelector(key.channel(),
byteBuffer, readTimeout);
byteBuffer.flip();
return bytesRead;
}
/**
* Return the timeout between two consecutives Selector.select() when a
* temporary Selector is used.
* @return read timeout being used
*/
public int getReadTimeout() {
return readTimeout;
}
/**
* Set the timeout between two consecutives Selector.select() when a
* temporary Selector is used.
* @param rt - read timeout
*/
public void setReadTimeout(int rt) {
readTimeout = rt;
}
/**
* Return the Selector.select() default time out.
* @return default time out
*/
public static int getDefaultReadTimeout() {
return defaultReadTimeout;
}
/**
* Set the default Selector.select() time out.
* @param aDefaultReadTimeout time out value
*/
public static void setDefaultReadTimeout(int aDefaultReadTimeout) {
defaultReadTimeout = aDefaultReadTimeout;
}
/**
* Return the {@link Channel} type. The return value is SocketChannel
* or DatagramChannel.
* @return {@link Channel} being used
*/
public ChannelType getChannelType() {
return defaultChannelType;
}
/**
* Set the {@link Channel} type, which is ocketChannel
* or DatagramChannel.
* @param channelType {@link Channel} to use
*/
public void setChannelType(ChannelType channelType) {
this.defaultChannelType = channelType;
}
/**
* Is this Stream secure.
* @return true is stream is secure, otherwise false
*/
public boolean isSecure() {
return secure;
}
/**
* Set this stream secure.
* @param secure true to set stream secure, otherwise false
*/
public void setSecure(boolean secure) {
this.secure = secure;
}
}