jetty实例

色婆ijqwj

　　jetty实例

package com.jetty;
import java.io.IOException;
import java.util.Map;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.eclipse.jetty.continuation.Continuation;
import org.eclipse.jetty.continuation.ContinuationSupport;
import org.eclipse.jetty.server.Request;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.handler.AbstractHandler;
import org.eclipse.jetty.server.nio.SelectChannelConnector;
import org.eclipse.jetty.util.thread.QueuedThreadPool;
import com.annotation.HBean;
import com.annotation.annoBean.AnnotationBeanLoader;
public class JettyServer {
private final ExecutorService es = Executors.newCachedThreadPool();
public void start(String host,int port) throws Exception{
Server server = new Server();//服务
//TCP监听
SelectChannelConnector appBeanConn = new SelectChannelConnector();
appBeanConn.setUseDirectBuffers(false);
appBeanConn.setHost(host);
appBeanConn.setPort(port);
appBeanConn.setThreadPool(new QueuedThreadPool(20));
appBeanConn.setName("appBeans");
server.addConnector(appBeanConn);
//处理类
server.setHandler(new HttpAppBeanHandler());
server.start();
server.join();
}

private class HttpAppBeanHandler extends AbstractHandler{
private static final String CALLTYPE = "calltype";
Map<String, Class<HBean>> map;
public HttpAppBeanHandler() throws Exception{
map = AnnotationBeanLoader.loadHandlerBean();
}
public void invokeBean(String id,HttpServletRequest request,HttpServletResponse response) throws InstantiationException, IllegalAccessException{
HBean bean = map.get(id).newInstance();//获取bean
bean.init(request,response);//初始化bean
bean.response(request,response);//相应bean
}
@Override
public void handle(String str, final Request baseRequest, final HttpServletRequest request,
final HttpServletResponse response) throws IOException, ServletException {
//String method = request.getMethod();
final String callType = (String) request.getAttribute(CALLTYPE);
final Continuation continuation = ContinuationSupport.getContinuation(request);
if(continuation.isExpired()){
response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR,"http bean invocation timeout");
Future<?> f = (Future<?>) request.getAttribute("KEY_INVOCATION_FUTURN");
if(f != null)
f.cancel(true);
}else{
continuation.setTimeout(1000*3);
continuation.suspend(response);
Future<?> f = es.submit(new Runnable() {
@Override
public void run() {
try {
invokeBean(callType, request, response);
} catch (InstantiationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
continuation.complete();
}//run
});//future
}
}
}
}
　　server使用httphandler，在handler中根据请求id，分发到处理业务的实体bean接口上

/**
* 处理实体类接口
* @author y
*/
public interface HBean {
/**
* 初始化bean
* @param request
* @param response
*/
void init(HttpServletRequest request,HttpServletResponse response);
/**
* 相应
* @param request
* @param response
*/
void response(HttpServletRequest request,HttpServletResponse response);
}
　　实体bean用注释作为id区分，加载获取指定目录下的所有类，用注释“包名”-“id"作为实体bean的id

/**
* 定义处理bean的ID注解
* 包含ID前缀包，ID名称
* ID前缀包默认值"com.dz"
* @author y
*/
@Target(ElementType.TYPE)//放在哪
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Inherited
public @interface HBID {
public String id();
public String catalog() default "com.dz";
}
　　加载子类目录 http://blackproof.iteye.com/blog/2015036
　　jetty的continuation分析 http://blog.csdn.net/kobejayandy/article/details/11874353