我怎样才能使阻塞的Java线程等待Tomcat可互操作

Question

I have embedded Tomcat inside a JavaFX application. I need Tomcat to run for the duration of my application lifespan.

Thread.stop() is deprecated, so I'm trying to use another method, but this always gives me an exception

"Exception in thread "JavaFX Application Thread" java.lang.RuntimeException: java.lang.reflect.InvocationTargetException" on the line 74: tomcat.wait(500);.

 Caused by: java.lang.IllegalMonitorStateException
        at java.lang.Object.wait(Native Method)
        at webappgen.TomcatThread.run(WebServer.java:74)
        at webappgen.WebServer.Start(WebServer.java:22)
        at webappgen.Project.StartWebServer(Project.java:31)
        at webappgen.FXMLDocumentController.handleNewProjectAction(FXMLDocumentController.java:81)
        ... 56 more

Here is what I'm trying:

package webappgen;

import java.io.File;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.ServletException;
import org.apache.catalina.LifecycleException;
import org.apache.catalina.startup.Tomcat;


public class WebServer {

    TomcatThread thread;

    public WebServer(){

    }

    public void Start(String dir){

        thread = new TomcatThread(dir);
        thread.run();

    }

    public void Stop(){
        synchronized(TomcatThread.obj){
            thread.interrupt();
        }
    }
}


class TomcatThread extends Thread {
    public static final Object obj = new Object();
    private String dir;
    private volatile boolean stopServer = false;

    public void StopServer(boolean stop){
        this.stopServer = stop;
    }
    public TomcatThread(String dir){
        this.dir = dir;
    }
    @Override
    public void run() {
        String webappDirLocation = dir;
        Tomcat tomcat = new Tomcat();

        String webPort = "8083";
        tomcat.setPort(Integer.valueOf(webPort));

        try {
            tomcat.addWebapp("/", new File(webappDirLocation).getAbsolutePath());
        } catch (ServletException ex) {
            Logger.getLogger(WebServer.class.getName()).log(Level.SEVERE, null, ex);
        }
        System.out.println("configuring app with basedir: " + new File(webappDirLocation).getAbsolutePath());

        try {
            tomcat.start();
        } catch (LifecycleException ex) {
            Logger.getLogger(WebServer.class.getName()).log(Level.SEVERE, null, ex);
        }

        synchronized(TomcatThread.obj){
            while(!stopServer){

                try {
                     tomcat.wait(500);

                } catch (InterruptedException ex) {
                       Logger.getLogger(TomcatThread.class.getName()).log(Level.SEVERE, null, ex);
                }

            }
        }
        try {
            tomcat.getServer().stop();
            tomcat.getServer().destroy();
        } catch (LifecycleException ex) {
            Logger.getLogger(TomcatThread.class.getName()).log(Level.SEVERE, null, ex);
        }

    }
};

Answer 1

在线程启动后，使用Thread.join（）等待TomcatThread死掉。