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

Class LocalSessionCacheWriter

    • Constructor Summary

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

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void beforeCreate​(EntryEvent<java.lang.String,​javax.servlet.http.HttpSession> event)
      Called before an entry is created.
      void beforeDestroy​(EntryEvent<java.lang.String,​javax.servlet.http.HttpSession> event)
      Called before an entry is destroyed.
      void beforeUpdate​(EntryEvent<java.lang.String,​javax.servlet.http.HttpSession> event)
      Called before an entry is updated.
      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.

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • LocalSessionCacheWriter

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

    • Method Detail

      • beforeCreate

        public void beforeCreate​(EntryEvent<java.lang.String,​javax.servlet.http.HttpSession> event)
                  throws CacheWriterException
        Description copied from interface: CacheWriter
        Called before an entry is created. Entry creation is initiated by a create, a put, or a get. The CacheWriter can determine whether this value comes from a get or not by evaluating the Operation's Operation.isLoad() method. The entry being created may already exist in the local cache where this CacheWriter is installed, but it does not yet exist in the cache where the operation was initiated.
        Specified by:
        beforeCreate in interface CacheWriter<java.lang.String,​javax.servlet.http.HttpSession>
        Overrides:
        beforeCreate in class CacheWriterAdapter<java.lang.String,​javax.servlet.http.HttpSession>
        Parameters:
        event - an EntryEvent that provides information about the operation in progress
        Throws:
        CacheWriterException - if thrown will abort the operation in progress, and the exception will be propagated back to caller that initiated the operation
        See Also:
        Region.create(Object, Object), Region.put(Object, Object), Region.get(Object)

      • beforeUpdate

        public void beforeUpdate​(EntryEvent<java.lang.String,​javax.servlet.http.HttpSession> event)
                  throws CacheWriterException
        Description copied from interface: CacheWriter
        Called before an entry is updated. The entry update is initiated by a put or a get that causes the loader to update an existing entry. The entry previously existed in the cache where the operation was initiated, although the old value may have been null. The entry being updated may or may not exist in the local cache where the CacheWriter is installed.
        Specified by:
        beforeUpdate in interface CacheWriter<java.lang.String,​javax.servlet.http.HttpSession>
        Overrides:
        beforeUpdate in class CacheWriterAdapter<java.lang.String,​javax.servlet.http.HttpSession>
        Parameters:
        event - an EntryEvent that provides information about the operation in progress
        Throws:
        CacheWriterException - if thrown will abort the operation in progress, and the exception will be propagated back to caller that initiated the operation
        See Also:
        Region.put(Object, Object), Region.get(Object)

      • beforeDestroy

        public void beforeDestroy​(EntryEvent<java.lang.String,​javax.servlet.http.HttpSession> event)
                   throws CacheWriterException
        Description copied from interface: CacheWriter
        Called before an entry is destroyed. The entry being destroyed may or may not exist in the local cache where the CacheWriter is installed. This method is not called as a result of expiration or Region.localDestroy(Object).
        Specified by:
        beforeDestroy in interface CacheWriter<java.lang.String,​javax.servlet.http.HttpSession>
        Overrides:
        beforeDestroy in class CacheWriterAdapter<java.lang.String,​javax.servlet.http.HttpSession>
        Parameters:
        event - an EntryEvent that provides information about the operation in progress
        Throws:
        CacheWriterException - if thrown will abort the operation in progress, and the exception will be propagated back to caller that initiated the operation
        See Also:
        Region.destroy(Object)

      • 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
        Overrides:
        close in class CacheWriterAdapter<java.lang.String,​javax.servlet.http.HttpSession>
        See Also:
        RegionService.close(), Region.close(), Region.localDestroyRegion(), Region.destroyRegion(), AttributesMutator