小编Ben*_*Ben的帖子

基本上我有大约1,000,000个字符串,对于每个请求,我必须检查字符串是否属于列表.

我担心性能,所以最好的方法是什么？ArrayList？哈希？

这是我的web.xml

    <filter>
    <filter-name>pollingTest</filter-name>
    <filter-class>
        webapp.controller.core.servlet.PollingService
            </filter-class>
    <async-supported>true</async-supported>
</filter>
<filter-mapping>
    <filter-name>pollingTest</filter-name>
    <url-pattern>/app/poll</url-pattern>
    <dispatcher>REQUEST</dispatcher>
    <dispatcher>FORWARD</dispatcher>
    <dispatcher>ASYNC</dispatcher>
</filter-mapping>

这是班级:

public class PollingService implements Filter {
Logger logger = LoggerFactory.getLogger(getClass());

@Override
public void destroy() {
    logger.info("Destroy");
}

@Override
public void doFilter(ServletRequest req, ServletResponse res,
        FilterChain chain) throws IOException, ServletException {

    logger.info("Running");
    req.startAsync(req, res);
    this.doFilter(req, res, chain);
    return;
}

@Override
public void init(FilterConfig arg0) throws ServletException {

    logger.info("Init=");
}

}

我在glassfish和tomcat 7上运行它,得到例外:

java.lang.IllegalStateException: Request is within the scope of a filter or servlet that does …

我的代码:

    @Test
public void testAddRoleAndAddUser() {

    Role r = roleDao.findByProperty("name", "admin");
    if(r == null) {
        r = new Role();
        r.setName("admin");
        r.setDescription("Just administrator.");
        roleDao.save(r);
    }

    User u = dao.get(1l);
    Set<Role> roles = u.getRoleSet();
    logger.debug("Roles is null: " + (roles == null));
    roles.add(r);
    dao.save(u);
}

13:39:41041 ERROR:org.hibernate.LazyInitializationException未能懒洋洋地初始化角色的集合:xxx.entity.core.User.roleSet,没有会议或会议是封闭org.hibernate.LazyInitializationException:未能初始化懒洋洋的集合作用:xxx.entity.core.User.roleSet,没有会议或会议收于org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:380)在org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java: 372)在org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:365)在org.hibernate.collection.PersistentSet.add(PersistentSet.java:212)在sg.com.junglemedia.test.dao.impl.hibernate.UserDaoTest.testAddRoleAndAddUser(UserDaoTest.java:40)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)at sun.reflect.DelegatingMethodAccessorImpl.在org.junit的org.junit.runners.model.FrameworkMethod $ 1.runReflectiveCall(FrameworkMethod.java:44)的java.lang.reflect.Method.invoke(Method.java:597)中调用(DelegatingMethodAccessorImpl.java:25). org.junit.runners.runners.statements.InvokeMethod.evaluate上的org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)中的internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) InvokeMethod.java:20)在org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)在org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)org.junit.runners.ParentRunner $ 3.run(ParentRunner.java:193)at org.在org.junit.runners.ParentRunner.access $ 000(ParentRunner.java:42)的org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)上的junit.runners.ParentRunner $ 1.schedule(ParentRunner.java:52) org.junit.runners.ParentRunner $ 2.evaluate(ParentRunner.java:184)位于org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference的org.junit.runners.ParentRunner.run(ParentRunner.java:236).在运行org.eclipse.jdt.internal.junit.runner.RemoteTestRunner(JUnit4TestReference.java:46)在org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38).runTests(RemoteTestRunner.java:467)位于org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.的java:390)在org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

有人帮吗？

我想将servlet 3.0异步支持与spring MVC集成.就像是:

@RequestMapping("/chat")
@WebServlet(name="myServlet", asyncSupported=true)
public String getMessage(String userName) {
      ......
}

可能吗？

我必须为我的应用程序上传大约30M,因为它使用了大量的库,日志,Web引擎等.

我认为应该有一种方法可以在glassfish上分享这些库,但我没有弄明白.我试图将它们放在domain/lib/ext中但不起作用.

那么我应该在哪里存储这些库,我应该如何引用它们？谢谢.