我在tomcat中有30个WAR,它们之间存在依赖关系。所以我们有一个servlet按顺序部署它们。现在我想先按顺序部署所需的应用程序,然后再并行地部署它们。Tomcat使用ManagerServlet的多线程部署
我的代码如下所示。
public class MyDeployerServlet extends ManagerServlet {
...
public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
...
if(count < serialContexts){
super.deploy(writer, context, contextName, null, false, sm);
count++;
} else {
MyAsyncDeployer deployer = new MyAsyncDeployer(writer, context, contextName, null, false, sm);
Thread deployerThread = new Thread(deployer);
deployerThread.start();
}
}
MyAsyncDeployer运行的代码是:
public class MyAsyncDeployer extends MyDeployerServlet implements Runnable{
private PrintWriter writer;
private String config;
private ContextName context;
private String war;
private boolean update;
private StringManager sm;
public MyAsyncDeployer(PrintWriter writer, String config, ContextName context, String war, boolean update,
StringManager sm) {
this.writer = writer;
this.config = config;
this.context = context;
this.war = war;
this.update = update;
this.sm = sm;
}
public void run() {
super.deploy(writer, config, context, null, false, sm);
}
当我打电话,串行部署去罚款,但多线程部署抛出异常下面。
Exception in thread "Thread-9" java.lang.NullPointerException
at javax.servlet.GenericServlet.getServletContext(GenericServlet.java:123)
at javax.servlet.GenericServlet.log(GenericServlet.java:188)
at org.apache.catalina.manager.ManagerServlet.deploy(ManagerServlet.java:834)
at com.example.servlet.MyAsyncDeployer.run(MyAsyncDeployer.java:30)
at java.lang.Thread.run(Thread.java:745)
Exception in thread "Thread-10" java.lang.NullPointerException
at javax.servlet.GenericServlet.getServletContext(GenericServlet.java:123)
at javax.servlet.GenericServlet.log(GenericServlet.java:188)
at org.apache.catalina.manager.ManagerServlet.deploy(ManagerServlet.java:834)
at com.example.servlet.MyAsyncDeployer.run(MyAsyncDeployer.java:30)
at java.lang.Thread.run(Thread.java:745)
我很无能什么是在这里失踪,我在我的线程中使用相同的对象引用。如果这可以在多线程的方式进行部署?
我也打开任何其他方法,这个想法是部署前几个上下文,然后并行休息。 – Pankaj
什么类型的依赖关系(jar ...) –
@Pankaj我已经更新了我的答案,你可以再试一次吗? – qwwdfsad