小编Tom*_*Siu的帖子

我有一个需要以下Maven jibx插件的项目:

  <build>
    <plugins>
      <plugin>
        <groupId>org.jibx</groupId>
        <artifactId>maven-jibx-plugin</artifactId>
        <version>1.2.2</version>
        ...
      </plugin>
    </plugins>
  </build>

在jibx插件pom中,有一个xpp3依赖项,我想从我的项目构建过程中排除(由于某种原因我不能在我的私有存储库中).

有没有办法配置我的pom.xml(不是插件pom)来排除这种依赖？

编辑:我试图从插件pom中删除xpp3依赖项,项目可以成功构建,所以我知道依赖项不是必需的.

我想创建以下Spring bean(一个JMX监视器),它具有方法 setThresholds(Number highThreshold,Number lowThreshold).

我可以在配置中调用方法(带有两个参数)吗？我不想编写代码来调用它.

<bean id="myMonitor" class="javax.management.monitor.GaugeMonitor" init-method="start">
  <property name="observedObject">
    <bean class="javax.management.ObjectName">
      <constructor-arg value="test.jmx:name=testBean1" />
    </bean>
  </property>
  <property name="observedAttribute" value="testProperty" />
  <property name="granularityPeriod">
    <bean class="java.lang.Float">
      <constructor-arg value="1000" />
    </bean>
  </property>
</bean>

我现在正在GAE中开发一个Java Google云端点.在端点内部,它将尝试连接到Firebase服务器以获取一些数据.

但是,当我在端点中创建Firebase对象时,

Firebase ref = new Firebase(<My Firebase URL>);

GAE抛出以下错误:

java.security.AccessControlException: access denied ("java.lang.RuntimePermission" "modifyThreadGroup") 
    at java.security.AccessControlContext.checkPermission(AccessControlContext.java:382) 
    at java.security.AccessController.checkPermission(AccessController.java:572) 
    at java.lang.SecurityManager.checkPermission(SecurityManager.java:549) 
    at java.lang.ThreadGroup.checkAccess(ThreadGroup.java:315) 
    at java.lang.Thread.init(Thread.java:391) 
    at java.lang.Thread.init(Thread.java:349) 
    at java.lang.Thread.<init>(Thread.java:675) 
    at java.util.concurrent.Executors$DefaultThreadFactory.newThread(Executors.java:572) 
    at com.firebase.client.utilities.DefaultRunLoop$FirebaseThreadFactory.newThread(DefaultRunLoop.java:25) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.<init>(ThreadPoolExecutor.java:600) 
    at java.util.concurrent.ThreadPoolExecutor.addWorker(ThreadPoolExecutor.java:943) 
    at java.util.concurrent.ThreadPoolExecutor.ensurePrestart(ThreadPoolExecutor.java:1635) 
    at java.util.concurrent.ScheduledThreadPoolExecutor.delayedExecute(ScheduledThreadPoolExecutor.java:307) 
    at java.util.concurrent.ScheduledThreadPoolExecutor.schedule(ScheduledThreadPoolExecutor.java:526) 
    at java.util.concurrent.ScheduledThreadPoolExecutor.execute(ScheduledThreadPoolExecutor.java:615) 
    at com.firebase.client.utilities.DefaultRunLoop.scheduleNow(DefaultRunLoop.java:57) 
    at com.firebase.client.core.Repo.scheduleNow(Repo.java:176) 
    at com.firebase.client.core.Repo.<init>(Repo.java:58) 
    at com.firebase.client.core.RepoManager.getLocalRepo(RepoManager.java:46) 
    at com.firebase.client.core.RepoManager.getRepo(RepoManager.java:19) 
    at com.firebase.client.Firebase.<init>(Firebase.java:194) 
    at com.firebase.client.Firebase.<init>(Firebase.java:199) 
    at com.firebase.client.Firebase.<init>(Firebase.java:177)

我使用的是Firebase客户端2.2.3.似乎GAE不允许应用程序创建新线程.任何的想法？