Java 类org.springframework.beans.factory.access.BeanFactoryLocator 实例源码

/**
 * Returns an instance which uses the the specified selector, as the name of the
 * definition file(s). In the case of a name with a Spring "classpath*:" prefix,
 * or with no prefix, which is treated the same, the current thread's context class
 * loader's {@code getResources} method will be called with this value to get
 * all resources having that name. These resources will then be combined to form a
 * definition. In the case where the name uses a Spring "classpath:" prefix, or
 * a standard URL prefix, then only one resource file will be loaded as the
 * definition.
 * @param selector the location of the resource(s) which will be read and
 * combined to form the definition for the BeanFactoryLocator instance.
 * Any such files must form a valid ApplicationContext definition.
 * @return the corresponding BeanFactoryLocator instance
 * @throws BeansException in case of factory loading failure
 */
public static BeanFactoryLocator getInstance(String selector) throws BeansException {
    String resourceLocation = selector;
    if (resourceLocation == null) {
        resourceLocation = DEFAULT_RESOURCE_LOCATION;
    }

    // For backwards compatibility, we prepend "classpath*:" to the selector name if there
    // is no other prefix (i.e. "classpath*:", "classpath:", or some URL prefix).
    if (!ResourcePatternUtils.isUrl(resourceLocation)) {
        resourceLocation = ResourcePatternResolver.CLASSPATH_ALL_URL_PREFIX + resourceLocation;
    }

    synchronized (instances) {
        if (logger.isTraceEnabled()) {
            logger.trace("ContextSingletonBeanFactoryLocator.getInstance(): instances.hashCode=" +
                    instances.hashCode() + ", instances=" + instances);
        }
        BeanFactoryLocator bfl = instances.get(resourceLocation);
        if (bfl == null) {
            bfl = new ContextSingletonBeanFactoryLocator(resourceLocation);
            instances.put(resourceLocation, bfl);
        }
        return bfl;
    }
}

/**
 * Returns an instance which uses the the specified selector, as the name of the
 * definition file(s). In the case of a name with a Spring "classpath*:" prefix,
 * or with no prefix, which is treated the same, the current thread's context class
 * loader's {@code getResources} method will be called with this value to get
 * all resources having that name. These resources will then be combined to form a
 * definition. In the case where the name uses a Spring "classpath:" prefix, or
 * a standard URL prefix, then only one resource file will be loaded as the
 * definition.
 * @param selector the location of the resource(s) which will be read and
 * combined to form the definition for the BeanFactoryLocator instance.
 * Any such files must form a valid ApplicationContext definition.
 * @return the corresponding BeanFactoryLocator instance
 * @throws BeansException in case of factory loading failure
 */
public static BeanFactoryLocator getInstance(String selector) throws BeansException {
    String resourceLocation = selector;
    if (resourceLocation == null) {
        resourceLocation = DEFAULT_RESOURCE_LOCATION;
    }

    // For backwards compatibility, we prepend "classpath*:" to the selector name if there
    // is no other prefix (i.e. "classpath*:", "classpath:", or some URL prefix).
    if (!ResourcePatternUtils.isUrl(resourceLocation)) {
        resourceLocation = ResourcePatternResolver.CLASSPATH_ALL_URL_PREFIX + resourceLocation;
    }

    synchronized (instances) {
        if (logger.isTraceEnabled()) {
            logger.trace("ContextSingletonBeanFactoryLocator.getInstance(): instances.hashCode=" +
                    instances.hashCode() + ", instances=" + instances);
        }
        BeanFactoryLocator bfl = instances.get(resourceLocation);
        if (bfl == null) {
            bfl = new ContextSingletonBeanFactoryLocator(resourceLocation);
            instances.put(resourceLocation, bfl);
        }
        return bfl;
    }
}

/**
 * This test can run multiple times, but due to static keyed lookup of the locators,
 * 2nd and subsequent calls will actually get back same locator instance. This is not
 * really an issue, since the contained bean factories will still be loaded and released.
 */
@Override
@Test
public void testGetInstance() {
    // Try with and without 'classpath*:' prefix, and with 'classpath:' prefix.
    BeanFactoryLocator facLoc = ContextSingletonBeanFactoryLocator.getInstance(
            ClassUtils.addResourcePathToPackagePath(CLASS, CONTEXT));
    getInstanceTest1(facLoc);

    facLoc = ContextSingletonBeanFactoryLocator.getInstance(
            "classpath*:" + ClassUtils.addResourcePathToPackagePath(CLASS, CONTEXT));
    getInstanceTest2(facLoc);

    // This will actually get another locator instance, as the key is the resource name.
    facLoc = ContextSingletonBeanFactoryLocator.getInstance(
            "classpath:" + ClassUtils.addResourcePathToPackagePath(CLASS, CONTEXT));
    getInstanceTest3(facLoc);
}

/**
 * Returns an instance which uses the the specified selector, as the name of the
 * definition file(s). In the case of a name with a Spring "classpath*:" prefix,
 * or with no prefix, which is treated the same, the current thread's context class
 * loader's {@code getResources} method will be called with this value to get
 * all resources having that name. These resources will then be combined to form a
 * definition. In the case where the name uses a Spring "classpath:" prefix, or
 * a standard URL prefix, then only one resource file will be loaded as the
 * definition.
 * @param selector the location of the resource(s) which will be read and
 * combined to form the definition for the BeanFactoryLocator instance.
 * Any such files must form a valid ApplicationContext definition.
 * @return the corresponding BeanFactoryLocator instance
 * @throws BeansException in case of factory loading failure
 */
public static BeanFactoryLocator getInstance(String selector) throws BeansException {
    String resourceLocation = selector;
    if (resourceLocation == null) {
        resourceLocation = DEFAULT_RESOURCE_LOCATION;
    }

    // For backwards compatibility, we prepend "classpath*:" to the selector name if there
    // is no other prefix (i.e. "classpath*:", "classpath:", or some URL prefix).
    if (!ResourcePatternUtils.isUrl(resourceLocation)) {
        resourceLocation = ResourcePatternResolver.CLASSPATH_ALL_URL_PREFIX + resourceLocation;
    }

    synchronized (instances) {
        if (logger.isTraceEnabled()) {
            logger.trace("ContextSingletonBeanFactoryLocator.getInstance(): instances.hashCode=" +
                    instances.hashCode() + ", instances=" + instances);
        }
        BeanFactoryLocator bfl = instances.get(resourceLocation);
        if (bfl == null) {
            bfl = new ContextSingletonBeanFactoryLocator(resourceLocation);
            instances.put(resourceLocation, bfl);
        }
        return bfl;
    }
}

/**
 * Returns an instance which uses the specified selector, as the name of the
 * definition file(s). In the case of a name with a Spring "classpath*:" prefix,
 * or with no prefix, which is treated the same, the current thread's context class
 * loader's {@code getResources} method will be called with this value to get
 * all resources having that name. These resources will then be combined to form a
 * definition. In the case where the name uses a Spring "classpath:" prefix, or
 * a standard URL prefix, then only one resource file will be loaded as the
 * definition.
 * @param selector the location of the resource(s) which will be read and
 * combined to form the definition for the BeanFactoryLocator instance.
 * Any such files must form a valid ApplicationContext definition.
 * @return the corresponding BeanFactoryLocator instance
 * @throws BeansException in case of factory loading failure
 */
public static BeanFactoryLocator getInstance(String selector) throws BeansException {
    String resourceLocation = selector;
    if (resourceLocation == null) {
        resourceLocation = DEFAULT_RESOURCE_LOCATION;
    }

    // For backwards compatibility, we prepend "classpath*:" to the selector name if there
    // is no other prefix (i.e. "classpath*:", "classpath:", or some URL prefix).
    if (!ResourcePatternUtils.isUrl(resourceLocation)) {
        resourceLocation = ResourcePatternResolver.CLASSPATH_ALL_URL_PREFIX + resourceLocation;
    }

    synchronized (instances) {
        if (logger.isTraceEnabled()) {
            logger.trace("ContextSingletonBeanFactoryLocator.getInstance(): instances.hashCode=" +
                    instances.hashCode() + ", instances=" + instances);
        }
        BeanFactoryLocator bfl = instances.get(resourceLocation);
        if (bfl == null) {
            bfl = new ContextSingletonBeanFactoryLocator(resourceLocation);
            instances.put(resourceLocation, bfl);
        }
        return bfl;
    }
}

/**
 * Gets the applicationContext.
 *
 * @return the applicationContext.
 */
protected BeanFactory getApplicationContext() {
  try {
    if (applicationContext == null) {
      synchronized (LOCK) {
        if (applicationContext == null) {
          BeanFactoryLocator bfl = SingletonBeanFactoryLocator.getInstance(getBeanFactorySelector());
          BeanFactoryReference bf = bfl.useBeanFactory(getApplicationContextKey());
          BeanFactory tempApplicationContext = bf.getFactory();
          if (tempApplicationContext instanceof ConfigurableApplicationContext) {
            ((ConfigurableApplicationContext) tempApplicationContext).registerShutdownHook();
          }
          applicationContext = tempApplicationContext;
        }
      }
    }
    return applicationContext;
  } catch (RuntimeException ex) {
    LOG.error("{} context could not be instantiated.", getApplicationContextKey(), ex);
    throw ex;
  }
}

/**
 * Returns an instance which uses the the specified selector, as the name of the
 * definition file(s). In the case of a name with a Spring "classpath*:" prefix,
 * or with no prefix, which is treated the same, the current thread's context class
 * loader's {@code getResources} method will be called with this value to get
 * all resources having that name. These resources will then be combined to form a
 * definition. In the case where the name uses a Spring "classpath:" prefix, or
 * a standard URL prefix, then only one resource file will be loaded as the
 * definition.
 * @param selector the location of the resource(s) which will be read and
 * combined to form the definition for the BeanFactoryLocator instance.
 * Any such files must form a valid ApplicationContext definition.
 * @return the corresponding BeanFactoryLocator instance
 * @throws BeansException in case of factory loading failure
 */
public static BeanFactoryLocator getInstance(String selector) throws BeansException {
    String resourceLocation = selector;
    if (resourceLocation == null) {
        resourceLocation = DEFAULT_RESOURCE_LOCATION;
    }

    // For backwards compatibility, we prepend "classpath*:" to the selector name if there
    // is no other prefix (i.e. "classpath*:", "classpath:", or some URL prefix).
    if (!ResourcePatternUtils.isUrl(resourceLocation)) {
        resourceLocation = ResourcePatternResolver.CLASSPATH_ALL_URL_PREFIX + resourceLocation;
    }

    synchronized (instances) {
        if (logger.isTraceEnabled()) {
            logger.trace("ContextSingletonBeanFactoryLocator.getInstance(): instances.hashCode=" +
                    instances.hashCode() + ", instances=" + instances);
        }
        BeanFactoryLocator bfl = instances.get(resourceLocation);
        if (bfl == null) {
            bfl = new ContextSingletonBeanFactoryLocator(resourceLocation);
            instances.put(resourceLocation, bfl);
        }
        return bfl;
    }
}

/**
 * This test can run multiple times, but due to static keyed lookup of the locators,
 * 2nd and subsequent calls will actually get back same locator instance. This is not
 * really an issue, since the contained bean factories will still be loaded and released.
 */
@Override
@Test
public void testGetInstance() {
    // Try with and without 'classpath*:' prefix, and with 'classpath:' prefix.
    BeanFactoryLocator facLoc = ContextSingletonBeanFactoryLocator.getInstance(
            ClassUtils.addResourcePathToPackagePath(CLASS, CONTEXT));
    getInstanceTest1(facLoc);

    facLoc = ContextSingletonBeanFactoryLocator.getInstance(
            "classpath*:" + ClassUtils.addResourcePathToPackagePath(CLASS, CONTEXT));
    getInstanceTest2(facLoc);

    // This will actually get another locator instance, as the key is the resource name.
    facLoc = ContextSingletonBeanFactoryLocator.getInstance(
            "classpath:" + ClassUtils.addResourcePathToPackagePath(CLASS, CONTEXT));
    getInstanceTest3(facLoc);
}

public ComponentLoaderImpl () throws ClassNotFoundException, InstantiationException, IllegalAccessException, IOException {
    checkInit();
    BeanFactoryLocator factoryLocator = ContextSingletonBeanFactoryLocator
            .getInstance(String.format("classpath:%s", CoreGlobalProperty.BEAN_REF_CONTEXT_CONF));
    BeanFactoryReference ref = factoryLocator.useBeanFactory("parentContext");
    ioc = ref.getFactory();
}

private BeanFactory getBeanFactory(ServletContextEvent event) {
  String beanFactorySelector = getBeanFactorySelector(event);
  String applicationContextKey = getApplicationContextKey(event);
  BeanFactoryLocator bfl = SingletonBeanFactoryLocator
      .getInstance(beanFactorySelector);
  BeanFactoryReference bf = bfl.useBeanFactory(applicationContextKey);
  BeanFactory beanFactory = bf.getFactory();
  if (beanFactory instanceof ConfigurableApplicationContext) {
    ((ConfigurableApplicationContext) beanFactory).registerShutdownHook();
  }
  return beanFactory;
}

/**
 * Construct
 */
protected JBPMSpringActionHandler()
{
    // The following implementation is derived from Spring Modules v0.4
    BeanFactoryLocator factoryLocator = new JbpmFactoryLocator();
    BeanFactoryReference factory = factoryLocator.useBeanFactory(null);
    initialiseHandler(factory.getFactory());
}

/**
 * Gets the JBPM Engine instance
 * 
 * @return JBPM Engine
 */
private JBPMEngine getJBPMEngine()
{
    if (jbpmEngine == null)
    {
        BeanFactoryLocator factoryLocator = new JbpmFactoryLocator();
        BeanFactoryReference factory = factoryLocator.useBeanFactory(null);
        if (jbpmEngineName == null) jbpmEngineName = "jbpm_engine";
        jbpmEngine = (JBPMEngine) factory.getFactory().getBean(jbpmEngineName);
        if (jbpmEngine == null) { throw new WorkflowException(
                    "Failed to retrieve JBPMEngine component"); }
    }
    return jbpmEngine;
}

/**
 * Constructor
 */
public AlfrescoJobExecutor()
{
    BeanFactoryLocator factoryLocator = new JbpmFactoryLocator();
    BeanFactoryReference factory = factoryLocator.useBeanFactory(null);

    transactionService = (TransactionService)factory.getFactory().getBean(ServiceRegistry.TRANSACTION_SERVICE.getLocalName());
    jobLockService = (JobLockService)factory.getFactory().getBean(ServiceRegistry.JOB_LOCK_SERVICE.getLocalName());

    jbpmConfiguration = (JbpmConfiguration)factory.getFactory().getBean("jbpm_configuration");
}

/**
 * Construct
 */
protected JBPMSpringAssignmentHandler()
{
    // The following implementation is derived from Spring Modules v0.4
    BeanFactoryLocator factoryLocator = new JbpmFactoryLocator();
    BeanFactoryReference factory = factoryLocator.useBeanFactory(null);
    initialiseHandler(factory.getFactory());
}

/**
 * This method obtains a global ThreadLocal class independent of the classloader (JVM-scope singleton).
 * The easiest solution is to use System.getProperties().get/put, but this solution violate
 * Properties contract and have other drawbacks.
 * <p>Current solution relies on the idea behind
 * {@link org.springframework.beans.factory.access.SingletonBeanFactoryLocator}. See also bug #4648
 *
 * @return Global ThreadLocal (JVM-scope singleton).
 */
@SuppressWarnings("unchecked")
private static ThreadLocal<BeanFactory> getGlobalThreadLocal() {
    BeanFactoryLocator locator = SingletonBeanFactoryLocator.getInstance(BEAN_FACTORY_XML_PATH);
    BeanFactoryReference ref = locator.useBeanFactory(FACTORY_BEAN_NAME);
    StaticApplicationContext ctx = (StaticApplicationContext) ref.getFactory();
    if (!ctx.containsBean(THREAD_LOCAL_BEAN_NAME)) {
        ctx.registerSingleton(THREAD_LOCAL_BEAN_NAME, ThreadLocal.class);
    }
    return (ThreadLocal) ctx.getBean(THREAD_LOCAL_BEAN_NAME);
}

@Test
public void getInstance() {
    BeanFactoryLocator bf = DefaultLocatorFactory.getInstance();
    BeanFactoryLocator bf2 = DefaultLocatorFactory.getInstance();
    assertTrue(bf.equals(bf2));
}

@Test
public void getInstanceString() {
    BeanFactoryLocator bf = DefaultLocatorFactory.getInstance("my-bean-refs.xml");
    BeanFactoryLocator bf2 = DefaultLocatorFactory.getInstance("my-bean-refs.xml");
    assertTrue(bf.equals(bf2));
}

/**
 * Template method with default implementation (which may be overridden by a
 * subclass), to load or obtain an ApplicationContext instance which will be
 * used as the parent context of the root WebApplicationContext. If the
 * return value from the method is null, no parent context is set.
 * <p>The main reason to load a parent context here is to allow multiple root
 * web application contexts to all be children of a shared EAR context, or
 * alternately to also share the same parent context that is visible to
 * EJBs. For pure web applications, there is usually no need to worry about
 * having a parent context to the root web application context.
 * <p>The default implementation uses
 * {@link org.springframework.context.access.ContextSingletonBeanFactoryLocator},
 * configured via {@link #LOCATOR_FACTORY_SELECTOR_PARAM} and
 * {@link #LOCATOR_FACTORY_KEY_PARAM}, to load a parent context
 * which will be shared by all other users of ContextsingletonBeanFactoryLocator
 * which also use the same configuration parameters.
 * @param servletContext current servlet context
 * @return the parent application context, or {@code null} if none
 * @see org.springframework.context.access.ContextSingletonBeanFactoryLocator
 */
protected ApplicationContext loadParentContext(ServletContext servletContext) {
    ApplicationContext parentContext = null;
    String locatorFactorySelector = servletContext.getInitParameter(LOCATOR_FACTORY_SELECTOR_PARAM);
    String parentContextKey = servletContext.getInitParameter(LOCATOR_FACTORY_KEY_PARAM);

    if (parentContextKey != null) {
        // locatorFactorySelector may be null, indicating the default "classpath*:beanRefContext.xml"
        BeanFactoryLocator locator = ContextSingletonBeanFactoryLocator.getInstance(locatorFactorySelector);
        Log logger = LogFactory.getLog(ContextLoader.class);
        if (logger.isDebugEnabled()) {
            logger.debug("Getting parent context definition: using parent context key of '" +
                    parentContextKey + "' with BeanFactoryLocator");
        }
        this.parentContextRef = locator.useBeanFactory(parentContextKey);
        parentContext = (ApplicationContext) this.parentContextRef.getFactory();
    }

    return parentContext;
}

private ApplicationContext getApplicationContext() {
  BeanFactoryLocator bfl = SingletonBeanFactoryLocator
      .getInstance(beanFactorySelector);
  BeanFactoryReference bf = bfl.useBeanFactory(applicationContextKey);
  return (ApplicationContext) bf.getFactory();
}

private BeanFactoryReference getBeanFactoryReference() {
  BeanFactoryLocator bfl = SingletonBeanFactoryLocator.getInstance(beanFactorySelector);
  BeanFactoryReference bf = bfl.useBeanFactory(applicationContextKey);
  return bf;
}

private static BeanFactory getBeanFactory() {
    BeanFactoryLocator bfl = SingletonBeanFactoryLocator.getInstance(CONTEXT_PATH);
    bfl.useBeanFactory("org.sakuli.app.root");
    return getBeanFactoryReference().getFactory();
}

private static BeanFactoryReference getBeanFactoryReference() {
    BeanFactoryLocator bfl = SingletonBeanFactoryLocator.getInstance(CONTEXT_PATH);
    return bfl.useBeanFactory("org.sakuli.app.root");
}

public void testGetInstance() {
    BeanFactoryLocator bf = DefaultLocatorFactory.getInstance();
    BeanFactoryLocator bf2 = DefaultLocatorFactory.getInstance();
    assertTrue(bf.equals(bf2));
}

public void testGetInstanceString() {
    BeanFactoryLocator bf = DefaultLocatorFactory.getInstance("my-bean-refs.xml");
    BeanFactoryLocator bf2 = DefaultLocatorFactory.getInstance("my-bean-refs.xml");
    assertTrue(bf.equals(bf2));
}

/**
 * Template method with default implementation (which may be overridden by a
 * subclass), to load or obtain an ApplicationContext instance which will be
 * used as the parent context of the root WebApplicationContext. If the
 * return value from the method is null, no parent context is set.
 * <p>The main reason to load a parent context here is to allow multiple root
 * web application contexts to all be children of a shared EAR context, or
 * alternately to also share the same parent context that is visible to
 * EJBs. For pure web applications, there is usually no need to worry about
 * having a parent context to the root web application context.
 * <p>The default implementation uses
 * {@link org.springframework.context.access.ContextSingletonBeanFactoryLocator},
 * configured via {@link #LOCATOR_FACTORY_SELECTOR_PARAM} and
 * {@link #LOCATOR_FACTORY_KEY_PARAM}, to load a parent context
 * which will be shared by all other users of ContextsingletonBeanFactoryLocator
 * which also use the same configuration parameters.
 * @param servletContext current servlet context
 * @return the parent application context, or {@code null} if none
 * @see org.springframework.context.access.ContextSingletonBeanFactoryLocator
 */
protected ApplicationContext loadParentContext(ServletContext servletContext) {
    ApplicationContext parentContext = null;
    String locatorFactorySelector = servletContext.getInitParameter(LOCATOR_FACTORY_SELECTOR_PARAM);
    String parentContextKey = servletContext.getInitParameter(LOCATOR_FACTORY_KEY_PARAM);

    if (parentContextKey != null) {
        // locatorFactorySelector may be null, indicating the default "classpath*:beanRefContext.xml"
        BeanFactoryLocator locator = ContextSingletonBeanFactoryLocator.getInstance(locatorFactorySelector);
        Log logger = LogFactory.getLog(ContextLoader.class);
        if (logger.isDebugEnabled()) {
            logger.debug("Getting parent context definition: using parent context key of '" +
                    parentContextKey + "' with BeanFactoryLocator");
        }
        this.parentContextRef = locator.useBeanFactory(parentContextKey);
        parentContext = (ApplicationContext) this.parentContextRef.getFactory();
    }

    return parentContext;
}

/**
     * <p>onStart</p>
     */
    protected void onStart() {


//TODO REMOVE EXAMPLE IMPORTER CODE
//      ThreadCategory.setPrefix(ImporterService.NAME);
//      m_status = Fiber.STARTING;
//      ThreadCategory.getInstance().debug("SPRING: thread.classLoader="+Thread.currentThread().getContextClassLoader());

//      BeanFactoryLocator bfl = DefaultLocatorFactory.getInstance();
//      BeanFactoryReference bf = bfl.useBeanFactory("daoContext");
//      ApplicationContext daoContext = (ApplicationContext) bf.getFactory();

//      m_context = new ClassPathXmlApplicationContext(new String[] { "/org/opennms/netmgt/importer/importer-context.xml" }, daoContext);
//      ThreadCategory.getInstance().debug("SPRING: context.classLoader="+m_context.getClassLoader());
//      m_status = Fiber.RUNNING;

        ThreadCategory.getInstance().debug("SPRING: thread.classLoader="+Thread.currentThread().getContextClassLoader());

        // finds the already instantiated OpenNMS daoContext
        BeanFactoryLocator bfl = DefaultLocatorFactory.getInstance();
        BeanFactoryReference bf = bfl.useBeanFactory("daoContext");
        ApplicationContext daoContext = (ApplicationContext) bf.getFactory();


        // this chooses if we expect AlarmMonitor to run in seperate j2ee container ( Jboss ) or in local
        // OpenNMS spring container
        String qosdj2ee=System.getProperty("qosd.usej2ee");
        ThreadCategory.getInstance().info("QoSD System Property qosd.usej2ee=" + qosdj2ee );
        if ("true".equals(qosdj2ee)){
            ThreadCategory.getInstance().debug("QoSD using /org/openoss/opennms/spring/qosd/qosd-j2ee-context.xml");
            m_context = new ClassPathXmlApplicationContext(new String[] { "/org/openoss/opennms/spring/qosd/qosd-j2ee-context.xml" },daoContext);
        }
        else {
            ThreadCategory.getInstance().debug("QoSD using /org/openoss/opennms/spring/qosd/qosd-spring-context.xml");
            m_context = new ClassPathXmlApplicationContext(new String[] { "/org/openoss/opennms/spring/qosd/qosd-spring-context.xml" },daoContext);
        }

        ThreadCategory.getInstance().debug("SPRING: context.classLoader="+m_context.getClassLoader());

        getQoSD().init();
        getQoSD().start();


//      TODO remove original code       
//      ThreadCategory.setPrefix(QoSD.NAME);
//      m_status = Fiber.STARTING;
//      ThreadCategory.getInstance().debug("SPRING: thread.classLoader="+Thread.currentThread().getContextClassLoader());

//      // this chooses if we expect AlarmMonitor to run in seperate j2ee container ( Jboss ) or in local
//      // OpenNMS spring container
//      String qosdj2ee=System.getProperty("qosd.usej2ee");
//      ThreadCategory.getInstance().info("QoSD System Property qosd.usej2ee=" + qosdj2ee );
//      if ("true".equals(qosdj2ee)){
//      ThreadCategory.getInstance().debug("QoSD using /org/openoss/opennms/spring/qosd/qosd-j2ee-context.xml");
//      m_context = new ClassPathXmlApplicationContext(new String[] { "/org/openoss/opennms/spring/qosd/qosd-j2ee-context.xml" });
//      }
//      else {
//      ThreadCategory.getInstance().debug("QoSD using /org/openoss/opennms/spring/qosd/qosd-spring-context.xml");
//      m_context = new ClassPathXmlApplicationContext(new String[] { "/org/openoss/opennms/spring/qosd/qosd-spring-context.xml" });
//      }

//      ThreadCategory.getInstance().debug("SPRING: context.classLoader="+m_context.getClassLoader());

//      getQoSD().init();
//      getQoSD().start();


//      m_status = Fiber.RUNNING;
    }

/**
     * <p>onStart</p>
     */
    protected void onStart() {
//      TODO REMOVE EXAMPLE IMPORTER CODE
//      ThreadCategory.setPrefix(ImporterService.NAME);
//      m_status = Fiber.STARTING;
//      ThreadCategory.getInstance().debug("SPRING: thread.classLoader="+Thread.currentThread().getContextClassLoader());

//      BeanFactoryLocator bfl = DefaultLocatorFactory.getInstance();
//      BeanFactoryReference bf = bfl.useBeanFactory("daoContext");
//      ApplicationContext daoContext = (ApplicationContext) bf.getFactory();

//      m_context = new ClassPathXmlApplicationContext(new String[] { "/org/opennms/netmgt/importer/importer-context.xml" }, daoContext);
//      ThreadCategory.getInstance().debug("SPRING: context.classLoader="+m_context.getClassLoader());
//      m_status = Fiber.RUNNING;



        ThreadCategory.getInstance().debug("SPRING: thread.classLoader="+Thread.currentThread().getContextClassLoader());

        // finds the already instantiated OpenNMS daoContext
        BeanFactoryLocator bfl = DefaultLocatorFactory.getInstance();
        BeanFactoryReference bf = bfl.useBeanFactory("daoContext");
        ApplicationContext daoContext = (ApplicationContext) bf.getFactory();

        ThreadCategory.getInstance().debug("QoSDrx using /org/openoss/opennms/spring/qosdrx/qosdrx-spring-context.xml");
        m_context = new ClassPathXmlApplicationContext(new String[] { "/org/openoss/opennms/spring/qosdrx/qosdrx-spring-context.xml" }, daoContext);
        ThreadCategory.getInstance().debug("SPRING: context.classLoader="+m_context.getClassLoader());

        getQoSDrx().init();
        getQoSDrx().start();

//TODO remove old code      
//      ThreadCategory.setPrefix(QoSDrx.NAME);
//      m_status = Fiber.STARTING;
//      ThreadCategory.getInstance().debug("SPRING: thread.classLoader="+Thread.currentThread().getContextClassLoader());
//
//      ThreadCategory.getInstance().debug("QoSDrx using /org/openoss/opennms/spring/qosdrx/qosdrx-spring-context.xml");
//      m_context = new ClassPathXmlApplicationContext(new String[] { "/org/openoss/opennms/spring/qosdrx/qosdrx-spring-context.xml" });
//      ThreadCategory.getInstance().debug("SPRING: context.classLoader="+m_context.getClassLoader());
//
//      getQoSDrx().init();
//      getQoSDrx().start();
//
//
//      m_status = Fiber.RUNNING;
    }

/**
 * Initialization.
 * 
 * Retrieves the Spring context for the correlator.
 */
public void init() {
    final BeanFactoryLocator bfl = DefaultLocatorFactory.getInstance();
    final BeanFactoryReference bf = bfl.useBeanFactory("correlatorContext");
    m_correlator = (org.opennms.netmgt.correlation.Correlator) bf.getFactory().getBean("correlator");
}

/**
     * <p>onStart</p>
     */
    protected void onStart() {


//TODO REMOVE EXAMPLE IMPORTER CODE
//      ThreadCategory.setPrefix(ImporterService.NAME);
//      m_status = Fiber.STARTING;
//      ThreadCategory.getInstance().debug("SPRING: thread.classLoader="+Thread.currentThread().getContextClassLoader());

//      BeanFactoryLocator bfl = DefaultLocatorFactory.getInstance();
//      BeanFactoryReference bf = bfl.useBeanFactory("daoContext");
//      ApplicationContext daoContext = (ApplicationContext) bf.getFactory();

//      m_context = new ClassPathXmlApplicationContext(new String[] { "/org/opennms/netmgt/importer/importer-context.xml" }, daoContext);
//      ThreadCategory.getInstance().debug("SPRING: context.classLoader="+m_context.getClassLoader());
//      m_status = Fiber.RUNNING;

        ThreadCategory.getInstance().debug("SPRING: thread.classLoader="+Thread.currentThread().getContextClassLoader());

        // finds the already instantiated OpenNMS daoContext
        BeanFactoryLocator bfl = DefaultLocatorFactory.getInstance();
        BeanFactoryReference bf = bfl.useBeanFactory("daoContext");
        ApplicationContext daoContext = (ApplicationContext) bf.getFactory();


        // this chooses if we expect AlarmMonitor to run in seperate j2ee container ( Jboss ) or in local
        // OpenNMS spring container
        String qosdj2ee=System.getProperty("qosd.usej2ee");
        ThreadCategory.getInstance().info("QoSD System Property qosd.usej2ee=" + qosdj2ee );
        if ("true".equals(qosdj2ee)){
            ThreadCategory.getInstance().debug("QoSD using /org/openoss/opennms/spring/qosd/qosd-j2ee-context.xml");
            m_context = new ClassPathXmlApplicationContext(new String[] { "/org/openoss/opennms/spring/qosd/qosd-j2ee-context.xml" },daoContext);
        }
        else {
            ThreadCategory.getInstance().debug("QoSD using /org/openoss/opennms/spring/qosd/qosd-spring-context.xml");
            m_context = new ClassPathXmlApplicationContext(new String[] { "/org/openoss/opennms/spring/qosd/qosd-spring-context.xml" },daoContext);
        }

        ThreadCategory.getInstance().debug("SPRING: context.classLoader="+m_context.getClassLoader());

        getQoSD().init();
        getQoSD().start();


//      TODO remove original code       
//      ThreadCategory.setPrefix(QoSD.NAME);
//      m_status = Fiber.STARTING;
//      ThreadCategory.getInstance().debug("SPRING: thread.classLoader="+Thread.currentThread().getContextClassLoader());

//      // this chooses if we expect AlarmMonitor to run in seperate j2ee container ( Jboss ) or in local
//      // OpenNMS spring container
//      String qosdj2ee=System.getProperty("qosd.usej2ee");
//      ThreadCategory.getInstance().info("QoSD System Property qosd.usej2ee=" + qosdj2ee );
//      if ("true".equals(qosdj2ee)){
//      ThreadCategory.getInstance().debug("QoSD using /org/openoss/opennms/spring/qosd/qosd-j2ee-context.xml");
//      m_context = new ClassPathXmlApplicationContext(new String[] { "/org/openoss/opennms/spring/qosd/qosd-j2ee-context.xml" });
//      }
//      else {
//      ThreadCategory.getInstance().debug("QoSD using /org/openoss/opennms/spring/qosd/qosd-spring-context.xml");
//      m_context = new ClassPathXmlApplicationContext(new String[] { "/org/openoss/opennms/spring/qosd/qosd-spring-context.xml" });
//      }

//      ThreadCategory.getInstance().debug("SPRING: context.classLoader="+m_context.getClassLoader());

//      getQoSD().init();
//      getQoSD().start();


//      m_status = Fiber.RUNNING;
    }

/**
     * <p>onStart</p>
     */
    protected void onStart() {
//      TODO REMOVE EXAMPLE IMPORTER CODE
//      ThreadCategory.setPrefix(ImporterService.NAME);
//      m_status = Fiber.STARTING;
//      ThreadCategory.getInstance().debug("SPRING: thread.classLoader="+Thread.currentThread().getContextClassLoader());

//      BeanFactoryLocator bfl = DefaultLocatorFactory.getInstance();
//      BeanFactoryReference bf = bfl.useBeanFactory("daoContext");
//      ApplicationContext daoContext = (ApplicationContext) bf.getFactory();

//      m_context = new ClassPathXmlApplicationContext(new String[] { "/org/opennms/netmgt/importer/importer-context.xml" }, daoContext);
//      ThreadCategory.getInstance().debug("SPRING: context.classLoader="+m_context.getClassLoader());
//      m_status = Fiber.RUNNING;



        ThreadCategory.getInstance().debug("SPRING: thread.classLoader="+Thread.currentThread().getContextClassLoader());

        // finds the already instantiated OpenNMS daoContext
        BeanFactoryLocator bfl = DefaultLocatorFactory.getInstance();
        BeanFactoryReference bf = bfl.useBeanFactory("daoContext");
        ApplicationContext daoContext = (ApplicationContext) bf.getFactory();

        ThreadCategory.getInstance().debug("QoSDrx using /org/openoss/opennms/spring/qosdrx/qosdrx-spring-context.xml");
        m_context = new ClassPathXmlApplicationContext(new String[] { "/org/openoss/opennms/spring/qosdrx/qosdrx-spring-context.xml" }, daoContext);
        ThreadCategory.getInstance().debug("SPRING: context.classLoader="+m_context.getClassLoader());

        getQoSDrx().init();
        getQoSDrx().start();

//TODO remove old code      
//      ThreadCategory.setPrefix(QoSDrx.NAME);
//      m_status = Fiber.STARTING;
//      ThreadCategory.getInstance().debug("SPRING: thread.classLoader="+Thread.currentThread().getContextClassLoader());
//
//      ThreadCategory.getInstance().debug("QoSDrx using /org/openoss/opennms/spring/qosdrx/qosdrx-spring-context.xml");
//      m_context = new ClassPathXmlApplicationContext(new String[] { "/org/openoss/opennms/spring/qosdrx/qosdrx-spring-context.xml" });
//      ThreadCategory.getInstance().debug("SPRING: context.classLoader="+m_context.getClassLoader());
//
//      getQoSDrx().init();
//      getQoSDrx().start();
//
//
//      m_status = Fiber.RUNNING;
    }

/**
 * <p>init</p>
 */
public void init() {
    final BeanFactoryLocator bfl = DefaultLocatorFactory.getInstance();
       final BeanFactoryReference bf = bfl.useBeanFactory("correlatorContext");
       m_correlator = (org.opennms.netmgt.correlation.Correlator) bf.getFactory().getBean("correlator");
   }

/**
 * Template method with default implementation (which may be overridden by a
 * subclass), to load or obtain an ApplicationContext instance which will be
 * used as the parent context of the root WebApplicationContext. If the
 * return value from the method is null, no parent context is set.
 * <p>The main reason to load a parent context here is to allow multiple root
 * web application contexts to all be children of a shared EAR context, or
 * alternately to also share the same parent context that is visible to
 * EJBs. For pure web applications, there is usually no need to worry about
 * having a parent context to the root web application context.
 * <p>The default implementation uses
 * {@link org.springframework.context.access.ContextSingletonBeanFactoryLocator},
 * configured via {@link #LOCATOR_FACTORY_SELECTOR_PARAM} and
 * {@link #LOCATOR_FACTORY_KEY_PARAM}, to load a parent context
 * which will be shared by all other users of ContextsingletonBeanFactoryLocator
 * which also use the same configuration parameters.
 * @param servletContext current servlet context
 * @return the parent application context, or <code>null</code> if none
 * @throws BeansException if the context couldn't be initialized
 * @see org.springframework.context.access.ContextSingletonBeanFactoryLocator
 */
protected ApplicationContext loadParentContext(ServletContext servletContext)
        throws BeansException {

    ApplicationContext parentContext = null;
    String locatorFactorySelector = servletContext.getInitParameter(LOCATOR_FACTORY_SELECTOR_PARAM);
    String parentContextKey = servletContext.getInitParameter(LOCATOR_FACTORY_KEY_PARAM);

    if (parentContextKey != null) {
        // locatorFactorySelector may be null, indicating the default "classpath*:beanRefContext.xml"
        BeanFactoryLocator locator = ContextSingletonBeanFactoryLocator.getInstance(locatorFactorySelector);
        if (logger.isDebugEnabled()) {
            logger.debug("Getting parent context definition: using parent context key of '" +
                    parentContextKey + "' with BeanFactoryLocator");
        }
        this.parentContextRef = locator.useBeanFactory(parentContextKey);
        parentContext = (ApplicationContext) this.parentContextRef.getFactory();
    }

    return parentContext;
}

/**
 * Returns an instance which uses the default "classpath*:beanRefContext.xml", as
 * the name of the definition file(s). All resources returned by the current
 * thread's context class loader's {@code getResources} method with this
 * name will be combined to create a definition, which is just a BeanFactory.
 * @return the corresponding BeanFactoryLocator instance
 * @throws BeansException in case of factory loading failure
 */
public static BeanFactoryLocator getInstance() throws BeansException {
    return getInstance(null);
}

/**
 * Return an instance object implementing BeanFactoryLocator. This will normally
 * be a singleton instance of the specific ContextSingletonBeanFactoryLocator class,
 * using the default resource selector.
 */
public static BeanFactoryLocator getInstance() throws FatalBeanException {
    return ContextSingletonBeanFactoryLocator.getInstance();
}

/**
 * Return an instance object implementing BeanFactoryLocator. This will normally
 * be a singleton instance of the specific ContextSingletonBeanFactoryLocator class,
 * using the specified resource selector.
 * @param selector a selector variable which provides a hint to the factory as to
 * which instance to return.
 */
public static BeanFactoryLocator getInstance(String selector) throws FatalBeanException {
    return ContextSingletonBeanFactoryLocator.getInstance(selector);
}

/**
 * Determine the BeanFactoryLocator to obtain the BeanFactoryReference from.
 * <p>The default implementation exposes Spring's default
 * {@link ContextSingletonBeanFactoryLocator}.
 * @param target the target bean to autowire
 * @return the BeanFactoryLocator to use (never {@code null})
 * @see org.springframework.context.access.ContextSingletonBeanFactoryLocator#getInstance()
 */
protected BeanFactoryLocator getBeanFactoryLocator(Object target) {
    return ContextSingletonBeanFactoryLocator.getInstance();
}

/**
 * Returns an instance which uses the default "classpath*:beanRefContext.xml", as
 * the name of the definition file(s). All resources returned by the current
 * thread's context class loader's {@code getResources} method with this
 * name will be combined to create a definition, which is just a BeanFactory.
 * @return the corresponding BeanFactoryLocator instance
 * @throws BeansException in case of factory loading failure
 */
public static BeanFactoryLocator getInstance() throws BeansException {
    return getInstance(null);
}

/**
 * Return an instance object implementing BeanFactoryLocator. This will normally
 * be a singleton instance of the specific ContextSingletonBeanFactoryLocator class,
 * using the default resource selector.
 */
public static BeanFactoryLocator getInstance() throws FatalBeanException {
    return ContextSingletonBeanFactoryLocator.getInstance();
}

/**
 * Return an instance object implementing BeanFactoryLocator. This will normally
 * be a singleton instance of the specific ContextSingletonBeanFactoryLocator class,
 * using the specified resource selector.
 * @param selector a selector variable which provides a hint to the factory as to
 * which instance to return.
 */
public static BeanFactoryLocator getInstance(String selector) throws FatalBeanException {
    return ContextSingletonBeanFactoryLocator.getInstance(selector);
}

/**
 * Determine the BeanFactoryLocator to obtain the BeanFactoryReference from.
 * <p>The default implementation exposes Spring's default
 * {@link ContextSingletonBeanFactoryLocator}.
 * @param target the target bean to autowire
 * @return the BeanFactoryLocator to use (never {@code null})
 * @see org.springframework.context.access.ContextSingletonBeanFactoryLocator#getInstance()
 */
protected BeanFactoryLocator getBeanFactoryLocator(Object target) {
    return ContextSingletonBeanFactoryLocator.getInstance();
}