package com.ibm.niosvr.nioserver;
import java.util.List;
import java.util.LinkedList;
import java.nio.channels.SocketChannel;
import java.nio.channels.SelectionKey;
import java.nio.ByteBuffer;
import java.io.IOException;
/**
* <p>Title: ���߳�</p>
* <p>Description: ���߳����ڶ�ȡ�ͻ������</p>
* @author starboy
* @version 1.0
*/
public class Reader extends Thread {
private static List pool = new LinkedList();
private static Notifier notifier = Notifier.getNotifier();
public Reader() {
}
public void run() {
while (true) {
try {
SelectionKey key;
synchronized (pool) {
while (pool.isEmpty()) {
pool.wait();
}
key = (SelectionKey) pool.remove(0);
}
// ��ȡ���
read(key);
}
catch (Exception e) {
continue;
}
}
}
/**
* ��ȡ�ͻ��˷����������
* @param sc ��ͨ��
*/
private static int BUFFER_SIZE = 1024;
public static byte[] readRequest(SocketChannel sc) throws IOException {
ByteBuffer buffer = ByteBuffer.allocate(BUFFER_SIZE);
int off = 0;
int r = 0;
byte[] data = new byte[BUFFER_SIZE * 10];
while ( true ) {
buffer.clear();
r = sc.read(buffer);
if (r == -1) break;
if ( (off + r) > data.length) {
data = grow(data, BUFFER_SIZE * 10);
}
byte[] buf = buffer.array();
System.arraycopy(buf, 0, data, off, r);
off += r;
}
byte[] req = new byte[off];
System.arraycopy(data, 0, req, 0, off);
return req;
}
/**
* ����������ݶ�ȡ
* @param key SelectionKey
*/
public void read(SelectionKey key) {
try {
// ��ȡ�ͻ������
SocketChannel sc = (SocketChannel) key.channel();
byte[] clientData = readRequest(sc);
Request request = (Request)key.attachment();
request.setDataInput(clientData);
// ����onRead
notifier.fireOnRead(request);
// �ύ�����߳̽���д����
Server.processWriteRequest(key);
}
catch (Exception e) {
notifier.fireOnError("Error occured in Reader: " + e.getMessage());
}
}
/**
* ����ͻ�����,�����û��������,�����Ѷ����е��߳̽��д���
*/
public static void processRequest(SelectionKey key) {
synchronized (pool) {
pool.add(pool.size(), key);
pool.notifyAll();
}
}
/**
* ��������
* @param src byte[] Դ�������
* @param size int ���ݵ�������
* @return byte[] ���ݺ������
*/
public static byte[] grow(byte[] src, int size) {
byte[] tmp = new byte[src.length + size];
System.arraycopy(src, 0, tmp, 0, src.length);
return tmp;
}
}