java socket NIO2.0模式
public class TimeServer {
public static void main(String[] args) {
int port = 8080;
if(null != args && args.length > 0) {
try {
port = Integer.parseInt(args[0]);
} catch (NumberFormatException e) {
e.printStackTrace();
}
}
AsyncTimeServerHandler timeServer = new AsyncTimeServerHandler(port);
new Thread(timeServer, "AIO-AsyncTimeServerHandler-001").start();;
}
}
import java.io.IOException;
import java.net.InetSocketAddress;
import java.nio.channels.AsynchronousServerSocketChannel;
import java.util.concurrent.CountDownLatch;
public class AsyncTimeServerHandler implements Runnable {
private int port;
CountDownLatch latch;
AsynchronousServerSocketChannel asynchronousServerSocketChannel;
public AsyncTimeServerHandler(int port) {
this.port = port;
try {
asynchronousServerSocketChannel = AsynchronousServerSocketChannel.open();
asynchronousServerSocketChannel.bind(new InetSocketAddress(this.port));
System.out.println("the time server is start in port "+this.port);
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public void run() {
latch = new CountDownLatch(1);
doAccept();
try {
latch.await();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
private void doAccept() {
asynchronousServerSocketChannel.accept(this, new AcceptCompletionHandler());
}
}
import java.nio.ByteBuffer;
import java.nio.channels.AsynchronousSocketChannel;
import java.nio.channels.CompletionHandler;
public class AcceptCompletionHandler implements CompletionHandler<AsynchronousSocketChannel, AsyncTimeServerHandler> {
@Override
public void completed(AsynchronousSocketChannel result, AsyncTimeServerHandler attachment) {
attachment.asynchronousServerSocketChannel.accept(attachment, this);
ByteBuffer buffer = ByteBuffer.allocate(1024);
result.read(buffer, buffer, new ReadCompletionHandler(result));
}
@Override
public void failed(Throwable exc, AsyncTimeServerHandler attachment) {
attachment.latch.countDown();
}
}
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.nio.ByteBuffer;
import java.nio.channels.AsynchronousSocketChannel;
import java.nio.channels.CompletionHandler;
import java.util.Date;
public class ReadCompletionHandler implements CompletionHandler<Integer, ByteBuffer> {
private AsynchronousSocketChannel channel;
public ReadCompletionHandler(AsynchronousSocketChannel channel) {
if(null == this.channel) {
this.channel = channel;
}
}
@Override
public void completed(Integer result, ByteBuffer attachment) {
attachment.flip();
byte[] body = new byte[attachment.remaining()];
attachment.get(body);
try {
String req = new String(body, "UTF-8");
System.out.println("The time server receive order :"+req);
String currentTime = "QUERY TIME ORDER".equalsIgnoreCase(req) ? new Date(System.currentTimeMillis()).toString() : "BAD ORDER";
doWrite(currentTime);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
private void doWrite(String currentTime) {
if(null != currentTime && currentTime.trim().length() > 0){
byte[] bytes = currentTime.getBytes();
ByteBuffer writeBuffer = ByteBuffer.allocate(bytes.length);
writeBuffer.put(bytes);
writeBuffer.flip();
channel.write(writeBuffer, writeBuffer, new CompletionHandler<Integer, ByteBuffer>(){
@Override
public void completed(Integer result, ByteBuffer buffer) {
//如果没有发送完成,则继续发送
if(buffer.hasRemaining()) {
channel.write(buffer, buffer, this);
}
}
@Override
public void failed(Throwable exc, ByteBuffer buffer) {
try {
channel.close();
} catch (IOException e) {
//e.printStackTrace();
}
}
});
}
}
@Override
public void failed(Throwable exc, ByteBuffer buffer) {
try {
this.channel.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
public class TimeClient {
public static void main(String[] args) {
int port = 8080;
if(null != args && args.length > 0) {
try {
port = Integer.parseInt(args[0]);
} catch (NumberFormatException e) {
e.printStackTrace();
}
}
new Thread(new AsyncTimeClientHandler("127.0.0.1", port), "AIO-AsyncTimeClientHandler-001").start();
}
}
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.AsynchronousSocketChannel;
import java.nio.channels.CompletionHandler;
import java.util.concurrent.CountDownLatch;
public class AsyncTimeClientHandler implements CompletionHandler<Void, AsyncTimeClientHandler>, Runnable {
private String host;
private int port;
private AsynchronousSocketChannel client;
private CountDownLatch latch;
public AsyncTimeClientHandler(String host, int port) {
this.host = host;
this.port = port;
try {
client = AsynchronousSocketChannel.open();
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public void run() {
latch = new CountDownLatch(1);
client.connect(new InetSocketAddress(host, port), this, this);
try {
latch.await();
} catch (InterruptedException e) {
e.printStackTrace();
}
try {
client.close();
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public void completed(Void result, AsyncTimeClientHandler attachment) {
// TODO Auto-generated method stub
byte[] req = "QUERY TIME ORDER".getBytes();
ByteBuffer writeBuffer = ByteBuffer.allocate(req.length);
writeBuffer.put(req);
writeBuffer.flip();
client.write(writeBuffer, writeBuffer, new CompletionHandler<Integer, ByteBuffer>(){
@Override
public void completed(Integer result, ByteBuffer buffer) {
if(buffer.hasRemaining()) {
client.write(buffer, buffer, this);
}else{
ByteBuffer readBuffer = ByteBuffer.allocate(1024);
client.read(readBuffer, readBuffer, new CompletionHandler<Integer, ByteBuffer>(){
@Override
public void completed(Integer result, ByteBuffer buffer) {
buffer.flip();
byte[] bytes = new byte[buffer.remaining()];
buffer.get(bytes);
String body;
try {
body = new String(bytes, "UTF-8");
System.out.println("Now is : "+body);
latch.countDown();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
@Override
public void failed(Throwable exc, ByteBuffer buffer) {
try {
client.close();
latch.countDown();
} catch (IOException e) {
//e.printStackTrace();
}
}
});
}
}
@Override
public void failed(Throwable exc, ByteBuffer buffer) {
try {
client.close();
latch.countDown();
} catch (IOException e) {
//e.printStackTrace();
}
}
});
}
@Override
public void failed(Throwable exc, AsyncTimeClientHandler attachment) {
try {
client.close();
latch.countDown();
} catch (IOException e) {
e.printStackTrace();
}
}
}
NIO2.0异步套接字通道是真正的异步非阻塞IO