打包 Jetty web 应用程序目录

Question

应用程序被打包为可执行 jar，但找不到包含在 fat jar 中的webapp 目录。所以我必须将 web 应用程序包含在与 fat jar 相同的目录中。

我怀疑问题与这段代码有关：

  public void init(String host, int port) throws Exception {
    logger.info("Starting Server bound to '" + host + ":" + port + "'");

    String memory = Configurations.get("refine.memory");
    if (memory != null) {
        logger.info("refine.memory size: " + memory + " JVM Max heap: " + Runtime.getRuntime().maxMemory());
    }

    int maxThreads = Configurations.getInteger("refine.queue.size", 30);
    int maxQueue = Configurations.getInteger("refine.queue.max_size", 300);
    long keepAliveTime = Configurations.getInteger("refine.queue.idle_time", 60);

    LinkedBlockingQueue<Runnable> queue = new LinkedBlockingQueue<Runnable>(maxQueue);

    threadPool = new ThreadPoolExecutor(maxThreads, maxQueue, keepAliveTime, TimeUnit.SECONDS, queue);

    this.setThreadPool(new ThreadPoolExecutorAdapter(threadPool));

    Connector connector = new SocketConnector();
    connector.setPort(port);
    connector.setHost(host);
    connector.setMaxIdleTime(Configurations.getInteger("refine.connection.max_idle_time",60000));
    connector.setStatsOn(false);
    this.addConnector(connector);

    File webapp = new File("webapp");

  final String contextPath = Configurations.get("refine.context_path","/");
  final int maxFormContentSize = Configurations.getInteger("refine.max_form_content_size", 1048576);

  logger.info("Initializing context: '" + contextPath + "' from '" + webapp.getAbsolutePath() + "'");

  WebAppContext context = new WebAppContext();

  URL webRootLocation = this.getClass().getResource("/webapp");
  if (webRootLocation == null)
  {
      throw new IllegalStateException("Unable to determine webroot URL location");
  }

  URI webRootUri = URI.create(webRootLocation.toURI().toASCIIString());

  System.err.printf("Web Root location: %s%n",webRootLocation);
  System.err.printf("Web Root URI: %s%n",webRootUri);

  context.setContextPath(webRootLocation.toString());
  context.setBaseResource(Resource.newResource(webRootLocation));
  context.setMaxFormContentSize(maxFormContentSize);
    this.setHandler(context);

    this.setHandler(context);
    this.setStopAtShutdown(true);
    this.setSendServerVersion(true);

    // Enable context autoreloading
    if (Configurations.getBoolean("refine.autoreload",false)) {
        scanForUpdates(webapp, context);
    }

    // start the server
    try {
        this.start();
    } catch (BindException e) {
        logger.error("Failed to start server - is there another copy running already on this port/address?");
        throw e;
    }

    configure(context);
}

我发现这似乎是一个可能的解决方案是SO， 我在正确的道路上吗？我该如何解决这个问题？

---

编辑

我根据此处给出的建议和网络搜索修改了代码，但现在出现以下错误：

@-ThinkPad-T450s:~/projects/github/OpenRefine/fatjar$ java -jar openrefinefat.jar 
10:54:47.405 [            refine_server] Starting Server bound to '127.0.0.1:3333' (0ms)
10:54:47.416 [            refine_server] Initializing context: '/' from '/home/me/projects/github/OpenRefine/fatjar/webapp' (11ms)
Web Root location: jar:file:/home/me/projects/github/OpenRefine/fatjar/openrefinefat.jar!/webapp
Web Root URI: jar:file:/home/me/projects/github/OpenRefine/fatjar/openrefinefat.jar!/webapp
10:54:48.506 [                   refine] Starting OpenRefine trunk [TRUNK]... (1090ms)
10:54:48.537 [..enrefinefat.jar!/webapp] unavailable (31ms)
java.lang.NullPointerException
    at java.io.File.<init>(File.java:277)
    at edu.mit.simile.butterfly.Butterfly.init(Butterfly.java:191)
    at org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:440)
    at org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:263)
    at com.google.refine.RefineServer.configure(Refine.java:328)
    at com.google.refine.RefineServer.init(Refine.java:242)
    at com.google.refine.Refine.init(Refine.java:117)
    at com.google.refine.Refine.main(Refine.java:111)
10:54:48.543 [          org.mortbay.log] Nested in javax.servlet.ServletException: java.lang.NullPointerException: (6ms)
java.lang.NullPointerException
    at java.io.File.<init>(File.java:277)
    at edu.mit.simile.butterfly.Butterfly.init(Butterfly.java:191)
    at org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:440)
    at org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:263)
    at com.google.refine.RefineServer.configure(Refine.java:328)
    at com.google.refine.RefineServer.init(Refine.java:242)
    at com.google.refine.Refine.init(Refine.java:117)
    at com.google.refine.Refine.main(Refine.java:11
Created new window in existing browser session.

Answer 1

您错过了WebAppContext.setBaseResource(Resource) 电话。

这就是WebAppContext 和ServletContext 查找其静态资源以及特定于该上下文的任何配置资源的方式。