source: trunk/gsdl3/src/java/org/greenstone/server/Server.java@ 13602

package org.greenstone.server;

import java.awt.Dimension;
import java.awt.Toolkit;
import java.io.File;
import java.io.InputStream;
import java.util.Properties;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;

import org.apache.log4j.*;

import org.greenstone.gsdl3.util.Dictionary;
import org.greenstone.gsdl3.util.GlobalProperties;

public class Server {
     /** Ant command for managing Tomcat */
    static final private String START_CMD = "start";
    static final private String RESTART_CMD = "restart";
    static final private String CONFIGURE_CMD = "configure";
    static final private String STOP_CMD = "stop";

    public static final int SERVER_STARTED = 0;
    public static final int SERVER_START_FAILED = 1;
    public static final int BROWSER_LAUNCHED = 2;
    public static final int BROWSER_LAUNCH_FAILED = 3; 
    
    private int server_state = -1;    

    private boolean configure_required = false;

    public static File build_properties_file;
    public static Properties build_properties;
    public static Dictionary dictionary;
     
    private ServerControl server_control;    

    static Logger logger = Logger.getLogger(org.greenstone.server.Server.class.getName());
    
    public Server(String gsdl3_src_home)
    {
    
    String build_properties_path=gsdl3_src_home+File.separatorChar+"build.properties";
    this.build_properties_file = new File(build_properties_path);
    if (!this.build_properties_file.exists()) {
        logger.fatal("Can't find build.properties file "+build_properties_path);
        System.exit(1);
    }
    
    build_properties = new Properties();
    reloadBuildProperties();
    
    // make it dynamic language
    this.dictionary = new Dictionary("server", "en", this.getClass().getClassLoader());
    
    server_control = new ServerControl(this);
    
    String auto_start = build_properties.getProperty(StaticStrings.AUTOSTART_PROPERTY);
    if (auto_start != null && auto_start.equals("true")) {
        restart();
    }
    else{
        start();
    }  
         
   }

    public int getServerState(){
    return server_state;
    }

    private int runAnt(String cmd){
    RunAnt runAnt = new RunAnt();
    runAnt.setAntCmd(cmd);
    runAnt.run();
    return runAnt.getAntState();
    }


    public void reconfigRequired(){
    configure_required = true;
    }

    public void start() {
        int state = -1;
        server_state = -1;
    server_control.updateControl();
    stop();
    
    // reconfigure if necessary
        if (configure_required){
        server_control.displayMessage(dictionary.get("ServerControl.Configuring"));
        state = runAnt(CONFIGURE_CMD);
        
       if (state != RunAnt.SUCCESS){
           recordError(CONFIGURE_CMD);
       }
       GlobalProperties.reload(); // properties file may have changed, so reload it
       configure_required = false;
    }
    else{
        recordSuccess(CONFIGURE_CMD); 
    }
    
    server_control.displayMessage(dictionary.get("ServerControl.Starting"));
        state = runAnt(START_CMD);

    if (state != RunAnt.SUCCESS){
        recordError(START_CMD);
            server_state = SERVER_START_FAILED;  
            
    }               
    else{
        recordSuccess(START_CMD); 
            server_state = SERVER_STARTED; 
        } 

        server_control.updateControl();
    }
    
    private void recordError(String message){
        message = dictionary.get("ServerControl.Error",new String[]{message,GlobalProperties.getGSDL3Home()});
    server_control.displayMessage(message);
    logger.error(dictionary.get("ServerControl.Failed",new String[]{message}));
    }


    private void recordError(String message, Exception e){
        message = dictionary.get("ServerControl.Error",new String[]{message,GlobalProperties.getGSDL3Home()});
    server_control.displayMessage(message);
    logger.error(dictionary.get("ServerControl.Failed",new String[]{message}),e);
    }

    private void recordSuccess(String message){
        message = dictionary.get("ServerControl.Success",new String[]{message});
    server_control.displayMessage(message);
    logger.info(message);
    }

   
    public void launchBrowser() {
        server_state = -1;
        server_control.updateControl();   
        String message = dictionary.get("ServerControl.LaunchingBrowser");
        server_control.displayMessage(message); 
    String url = GlobalProperties.getGSDL3WebAddress()+ build_properties.getProperty(StaticStrings.DEFAULT_SERVLET_PROPERTY);
    BrowserLauncher launcher = new BrowserLauncher(build_properties.getProperty(StaticStrings.BROWSER_PATH),url);
        logger.info(message);

    launcher.start();
     
        //wait for a while
        while(launcher.getState() == -1){
            try{
        Thread.sleep(3000);
        }
        catch(Exception e){
        logger.error(e);
        }
         } 

    if (launcher.getState() != BrowserLauncher.LAUNCHSUCCESS ){
        recordError(dictionary.get("ServerControl.LaunchBrowser")); 
        server_state = BROWSER_LAUNCH_FAILED; 
    }
    else{
        recordSuccess(dictionary.get("ServerControl.LaunchBrowser")); 
        server_state = BROWSER_LAUNCHED;
    }    
        
    server_control.updateControl();        
    }
    
    public void restart(){
    start();       
        if (server_state == SERVER_STARTED){
        launchBrowser();
    }  
    }

    public void stop() {
         server_control.displayMessage(dictionary.get("ServerControl.Stopping"));
     int state = runAnt(STOP_CMD);
    
        if (state != RunAnt.SUCCESS){
        recordError(STOP_CMD);
    }
    else{
        recordSuccess(STOP_CMD);
    }

    }
    
    public  void reloadBuildProperties() {
    try {
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("build.properties");
        
        if (in != null) {
        logger.info("loading build properties");
        build_properties.load(in);
        in.close();
        } else {
        logger.error("couldn't load build properties!");
        }
    } catch (Exception e) {
        logger.error("Exception trying to reload build.properties: "+e);
    }
    
    }

  

    public static void main (String[] args){
        if (args.length != 1) {
        System.err.println("Usage: java org.greenstone.server.ServerMain <gsdl3 src home> ");
        System.exit(1);
    }
    
    File gsdl3_src_dir = new File(args[0]);
    if (!gsdl3_src_dir.isDirectory()) {
        System.err.println("src directory does not exist!");
        System.exit(1);
    }
    
    new Server(args[0]);
    }
}