Package org.apache.geode.modules.session.catalina.callback

Class LocalSessionCacheLoader

  • java.lang.Object
    • org.apache.geode.modules.session.catalina.callback.LocalSessionCacheLoader

    • Constructor Summary

      Constructors 
      Constructor Description
      LocalSessionCacheLoader​(Region<java.lang.String,​javax.servlet.http.HttpSession> backingRegion)  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void close()
      Called when the region containing this callback is closed or destroyed, when the cache is closed, or when a callback is removed from a region using an AttributesMutator.
      javax.servlet.http.HttpSession load​(LoaderHelper<java.lang.String,​javax.servlet.http.HttpSession> helper)
      Loads a value.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • LocalSessionCacheLoader

        public LocalSessionCacheLoader​(Region<java.lang.String,​javax.servlet.http.HttpSession> backingRegion)

    • Method Detail

      • load

        public javax.servlet.http.HttpSession load​(LoaderHelper<java.lang.String,​javax.servlet.http.HttpSession> helper)
                                    throws CacheLoaderException
        Description copied from interface: CacheLoader
        Loads a value. Application writers should implement this method to customize the loading of a value. This method is called by the caching service when the requested value is not in the cache. Any exception (including an unchecked exception) thrown by this method is propagated back to and thrown by the invocation of Region.get(Object, Object) that triggered this load.

        Specified by:
        load in interface CacheLoader<java.lang.String,​javax.servlet.http.HttpSession>
        Parameters:
        helper - a LoaderHelper object that is passed in from cache service and provides access to the key, region, argument, and netSearch.
        Returns:
        the value supplied for this key, or null if no value can be supplied. A local loader will always be invoked if one exists. Otherwise one remote loader is invoked. Returning null causes Region.get(Object, Object) to return null.
        Throws:
        CacheLoaderException - if an error occurs. This exception or any other exception thrown by this method will be propagated back to the application from the get method.
        See Also:
        Region.get

      • close

        public void close()
        Description copied from interface: CacheCallback
        Called when the region containing this callback is closed or destroyed, when the cache is closed, or when a callback is removed from a region using an AttributesMutator.

        Implementations should cleanup any external resources such as database connections. Any runtime exceptions this method throws will be logged.

        It is possible for this method to be called multiple times on a single callback instance, so implementations must be tolerant of this.

        Specified by:
        close in interface CacheCallback
        See Also:
        RegionService.close(), Region.close(), Region.localDestroyRegion(), Region.destroyRegion(), AttributesMutator