AVA NIO 多线程服务器 1.2版

reactor 模式的 java nio 多线程服务器
public class miniserver extends thread<br>{<br> private static final log log = logfactory.getlog(miniserver.class);<br><br> private final selector s;<br> private final serversocketchannel ssc;<br> private executorservice executor;<br><br> public miniserver(int portnumber,executorservice executor) throws ioexception<br> {<br> this.executor=executor;<br> s = selector.open();<br> ssc = serversocketchannel.open();<br> ssc.socket().bind(new inetsocketaddress(portnumber));<br> ssc.configureblocking(false);<br> ssc.register(s,selectionkey.op_accept);<br> }<br><br> public void run()<br> {<br> try<br> {<br> while(s.isopen())<br> {<br> int nkeys=s.select();<br> if(nkeys>0)<br> {<br> iterator<selectionkey> it = s.selectedkeys().iterator();<br> while (it.hasnext()) <br> {<br> selectionkey key = it.next();<br> it.remove();<br> if (!key.isvalid() || !key.channel().isopen())<br> continue;<br> if(key.isacceptable())<br> {<br> socketchannel sc = ssc.accept();<br> if (sc != null)<br> {<br> sc.configureblocking(false);<br> sc.register(s, selectionkey.op_read, new reader(executor));<br> }<br> }<br> else if(key.isreadable()||key.iswritable())<br> {<br> reactor reactor = (reactor) key.attachment();<br> reactor.execute(key);<br> }<br> }<br> }<br> }<br> }<br> catch(ioexception e)<br> {<br> log.info(e);<br> }<br> }<br>}
<br>public interface reactor <br>{<br> void execute(selectionkey key);<br>}
<br>public class reader implements reactor <br>{<br> private static final log log = logfactory.getlog(reader.class);<br><br> private byte[] bytes=new byte[0];<br> private executorservice executor;<br><br> public reader(executorservice executor)<br> {<br> this.executor=executor;<br> }<br><br> @override<br> public void execute(selectionkey key)<br> {<br> socketchannel sc = (socketchannel) key.channel();<br> try<br> {<br> bytebuffer buffer=bytebuffer.allocate(1024);<br> int len=-1;<br> while(sc.isconnected() && (len=sc.read(buffer))>0)<br> {<br> buffer.flip();<br> byte [] content = new byte[buffer.limit()];<br> buffer.get(content);<br> bytes=nututil.arraycoalition(bytes,content);<br> buffer.clear();<br> }<br> if(len==0)<br> {<br> key.interestops(selectionkey.op_read);<br> key.selector().wakeup(); <br> }<br> else if(len==-1)<br> {<br> callable<byte[]> call=new processcallable(bytes);<br> future<byte[]> task=executor.submit(call);<br> bytebuffer output=bytebuffer.wrap(task.get());<br> sc.register(key.selector(), selectionkey.op_write, new writer(output));<br> }<br> }<br> catch(exception e)<br> {<br> log.info(e);<br> }<br> }<br>}
<br>public class writer implements reactor <br>{<br> private static final log log = logfactory.getlog(writer.class);<br><br> private bytebuffer output;<br><br> public writer(bytebuffer output)<br> {<br> this.output=output;<br> }<br><br> public void execute(selectionkey key)<br> {<br> socketchannel sc = (socketchannel) key.channel();<br> try<br> {<br> while(sc.isconnected() && output.hasremaining())<br> {<br> int len=sc.write(output);<br> if(len<0)<br> { <br> throw new eofexception(); <br> } <br> if(len==0) <br> { <br> key.interestops(selectionkey.op_write); <br> key.selector().wakeup(); <br> break; <br> }<br> }<br> if(!output.hasremaining())<br> {<br> output.clear();<br> key.cancel();<br> sc.close();<br> }<br> }<br> catch(ioexception e)<br> {<br> log.info(e);<br> }<br> }<br>}