/**
* Copyright (c) 2011-2013, James Zhan 詹波 (jfinal@126.com).
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.jfinal.server;
import java.io.File;
import java.io.IOException;
import java.net.DatagramSocket;
import java.net.ServerSocket;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.SessionManager;
import org.eclipse.jetty.server.nio.SelectChannelConnector;
import org.eclipse.jetty.server.session.HashSessionManager;
import org.eclipse.jetty.server.session.SessionHandler;
import org.eclipse.jetty.webapp.WebAppContext;
import com.jfinal.core.Const;
import com.jfinal.kit.FileKit;
import com.jfinal.kit.PathKit;
import com.jfinal.kit.StringKit;
/**
* JettyServer is used to config and start jetty web server.
* Jetty version 8.1.8
*/
class JettyServer implements IServer {
private String webAppDir;
private int port;
private String context;
private int scanIntervalSeconds;
private boolean running = false;
private Server server;
private WebAppContext webApp;
JettyServer(String webAppDir, int port, String context, int scanIntervalSeconds) {
if (webAppDir == null)
throw new IllegalStateException("Invalid webAppDir of web server: " + webAppDir);
if (port < 0 || port > 65536)
throw new IllegalArgumentException("Invalid port of web server: " + port);
if (StringKit.isBlank(context))
throw new IllegalStateException("Invalid context of web server: " + context);
this.webAppDir = webAppDir;
this.port = port;
this.context = context;
this.scanIntervalSeconds = scanIntervalSeconds;
}
public void start() {
if (!running) {
try {doStart();} catch (Exception e) {e.printStackTrace();}
running = true;
}
}
public void stop() {
if (running) {
try {server.stop();} catch (Exception e) {e.printStackTrace();}
running = false;
}
}
private void doStart() {
if (!available(port))
throw new IllegalStateException("port: " + port + " already in use!");
deleteSessionData();
System.out.println("Starting JFinal " + Const.JFINAL_VERSION);
server = new Server();
SelectChannelConnector connector = new SelectChannelConnector();
connector.setPort(port);
server.addConnector(connector);
webApp = new WebAppContext();
webApp.setContextPath(context);
webApp.setResourceBase(webAppDir); // webApp.setWar(webAppDir);
webApp.setInitParameter("org.eclipse.jetty.servlet.Default.dirAllowed", "false");
webApp.setInitParameter("org.eclipse.jetty.servlet.Default.useFileMappedBuffer", "false"); // webApp.setInitParams(Collections.singletonMap("org.mortbay.jetty.servlet.Default.useFileMappedBuffer", "false"));
persistSession(webApp);
server.setHandler(webApp);
changeClassLoader(webApp);
// configureScanner
if (scanIntervalSeconds > 0) {
Scanner scanner = new Scanner(PathKit.getRootClassPath(), scanIntervalSeconds) {
public void onChange() {
try {
System.err.println("\nLoading changes ......");
webApp.stop();
JFinalClassLoader loader = new JFinalClassLoader(webApp, getClassPath());
webApp.setClassLoader(loader);
webApp.start();
System.err.println("Loading complete.");
} catch (Exception e) {
System.err.println("Error reconfiguring/restarting webapp after change in watched files");
e.printStackTrace();
}
}
};
System.out.println("Starting scanner at interval of " + scanIntervalSeconds + " seconds.");
scanner.start();
}
try {
System.out.println("Starting web server on port: " + port);
server.start();
System.out.println("Starting Complete. Welcome To The JFinal World :)");
server.join();
} catch (Exception e) {
e.printStackTrace();
System.exit(100);
}
return;
}
private void changeClassLoader(WebAppContext webApp) {
try {
String classPath = getClassPath();
JFinalClassLoader wacl = new JFinalClassLoader(webApp, classPath);
wacl.addClassPath(classPath);
} catch (IOException e) {
e.printStackTrace();
}
}
private String getClassPath() {
return System.getProperty("java.class.path");
}
private void deleteSessionData() {
try {
FileKit.delete(new File(getStoreDir()));
}
catch (Exception e) {
}
}
private String getStoreDir() {
String storeDir = PathKit.getWebRootPath() + "/../../session_data" + context;
if ("\\".equals(File.separator))
storeDir = storeDir.replaceAll("/", "\\\\");
return storeDir;
}
private void persistSession(WebAppContext webApp) {
String storeDir = getStoreDir();
SessionManager sm = webApp.getSessionHandler().getSessionManager();
if (sm instanceof HashSessionManager) {
((HashSessionManager)sm).setStoreDirectory(new File(storeDir));
return ;
}
HashSessionManager hsm = new HashSessionManager();
hsm.setStoreDirectory(new File(storeDir));
SessionHandler sh = new SessionHandler();
sh.setSessionManager(hsm);
webApp.setSessionHandler(sh);
}
private static boolean available(int port) {
if (port <= 0) {
throw new IllegalArgumentException("Invalid start port: " + port);
}
ServerSocket ss = null;
DatagramSocket ds = null;
try {
ss = new ServerSocket(port);
ss.setReuseAddress(true);
ds = new DatagramSocket(port);
ds.setReuseAddress(true);
return true;
} catch (IOException e) {
} finally {
if (ds != null) {
ds.close();
}
if (ss != null) {
try {
ss.close();
} catch (IOException e) {
// should not be thrown, just detect port available.
}
}
}
return false;
}
}