Package org.apache.geode.cache

Class DynamicRegionFactory

java.lang.Object
org.apache.geode.cache.DynamicRegionFactory
@Deprecated public abstract class DynamicRegionFactory extends Object
Deprecated.
This class is deprecated. Use FunctionService to create regions on other members instead.
DynamicRegionFactory provides a distributed region creation service. Any other member of the GemFire DistributedSystem that has created an instance of this class will automatically instantiate regions created through the factory from anywhere else in the DistributedSystem.

Instructions for Use:

  • If your application is a client in a client/server installation, either specify the pool name in the DynamicRegionFactory.Config you'll use to create a DynamicRegionFactory or specify it in a dynamic-region-factory element in your cache.xml.
  • Before you've created a GemFire Cache in your application, add a line of code as follows:
     {
   DynamicRegionFactory factory = DynamicRegionFactory.get();
   factory.open(config);
 }
 
     {
   DynamicRegionFactory myFactoryHandle = DynamicRegionFactory.get().open(config);
 }
    or just use a dynamic-region-factory element in the cache.xml.
  • Create the GemFire Cache. During cache creation, the list of dynamic Regions will either be discovered by recovering their names from disk (see DynamicRegionFactory.Config.persistBackup) or from other members of the distributed system. These dynamic Regions will be created before Cache creation completes.
  • Thereafter, when you want to create dynamic distributed Regions, create them using the createDynamicRegion(java.lang.String, java.lang.String). Regions created with the factory will inherit their RegionAttributes from their parent Region, though you can override callbacks when you configure the factory.

    All other instances of GemFire across the distributed system that instantiate and open a DynamicRegionFactory will also get the dynamic distributed Regions.

  • Non-dynamic parent Regions should be declared in cache.xml so that they can be created before the dynamic Region factory goes active and starts creating Regions. You will have cache creation problems if this isn't done.
  • A DynamicRegionListener can be registered before open is called and before cache creation so that the listener will be called if dynamic Regions are created during cache creation.

Saving the factory on disk: If DynamicRegionFactory.Config.persistBackup is configured for the factory, dynamic Region information is written to disk for recovery. By default the current directory is used for this information. The DynamicRegionFactory.Config.diskDir can be used to change this default.

Registering interest in cache server information: The DynamicRegionFactory.Config.registerInterest setting determines whether clients will register interest in server keys or not. You will generally want this to be turned on so that clients will see updates made to servers. In server processes, DynamicRegionFactory forces use of NotifyBySubscription.

Notes:

  • DynamicRegionFactories in non-client VMs must not be configured with a pool.
  • If open() is called before cache creation and the cache.xml has a dynamic-region-factory element then the cache.xml will override the open call's configuration.
  • Since the RegionAttributes of a dynamically created Region are copied from the parent Region, any callbacks, (CacheListener, CacheWriter, and CacheLoader are shared by the parent and all its dynamic children so make sure the callback is thread-safe and that its CacheCallback.close() implementation does not stop it from functioning. However the products EvictionAlgorithm instances will be cloned so that each dynamic Region has its own callback.
  • The root Region name "DynamicRegions" is reserved. The factory creates a root Region of that name and uses it to keep track of what dynamic Regions exist. Applications should not directly access this Region; instead use the methods on this factory.
Since:
GemFire 4.3

  • Field Details

  • Constructor Details

    • DynamicRegionFactory

      public DynamicRegionFactory()
      Deprecated.

  • Method Details

    • open

      public void open()
      Deprecated.
      Opens the DynamicRegionFactory with default settings.

    • open

      public void open(DynamicRegionFactory.Config conf)
      Deprecated.
      Opens the factory with the given settings. This should be sent to the factory before creating a cache. The cache will otherwise open a factory with default settings. This does not need to be sent if the cache.xml declares the use of dynamic regions.
      Parameters:
      conf - the configuration for this factory.

    • doClose

      protected void doClose()
      Deprecated.
      Closes the dynamic region factory, disabling any further creation or destruction of dynamic regions in this cache.

    • isOpen

      public boolean isOpen()
      Deprecated.
      Returns true if dynamic region factory is open; false if closed.
      Returns:
      whether this dynamic region factory is open

    • isActive

      public boolean isActive()
      Deprecated.
      Returns true if this factory is open and can produce dynamic regions. Factories are only active after their cache has been created.
      Returns:
      whether this factory is open and can produce dynamic regions

    • isClosed

      public boolean isClosed()
      Deprecated.
      Returns true if dynamic region factory is closed.
      Returns:
      whether the dynamic region factory is closed

    • getConfig

      public DynamicRegionFactory.Config getConfig()
      Deprecated.
      Returns the configuration for this factory. Returns null if the factory is closed;
      Returns:
      the configuration for this factory

    • regionIsDynamicRegionList

      public static boolean regionIsDynamicRegionList(String regionPath)
      Deprecated.

    • doInternalInit

      protected void doInternalInit(org.apache.geode.internal.cache.InternalCache theCache) throws CacheException
      Deprecated.
      The method is for internal use only. It is called implicitly during cache creation.

      This method is called internally during cache initialization at the correct time. Initialize the factory with a GemFire Cache. We create the metadata Region which holds all our dynamically created regions.

      Parameters:
      theCache - The GemFire Cache
      Throws:
      CacheException

    • get

      public static DynamicRegionFactory get()
      Deprecated.
      Returns the DynamicRegionFactory singleton instance.
      Returns:
      the DynamicRegionFactory singleton instance

    • registerDynamicRegionListener

      public void registerDynamicRegionListener(DynamicRegionListener listener)
      Deprecated.
      Registers a DynamicRegionListener for callbacks.
      Parameters:
      listener - The DynamicRegionListener to be registered

    • unregisterDynamicRegionListener

      public void unregisterDynamicRegionListener(DynamicRegionListener listener)
      Deprecated.
      Unregisters a DynamicRegionListener for callbacks.
      Parameters:
      listener - The DynamicRegionListener to be unregistered

    • createDynamicRegion

      public Region createDynamicRegion(String parentRegionName, String regionName) throws CacheException
      Deprecated.
      Creates the dynamic Region in the local cache and distributes the creation to other caches.
      Parameters:
      parentRegionName - the new region is created as a subregion of the region having this path
      regionName - the name of the new subregion
      Returns:
      the Region created
      Throws:
      CacheException

    • destroyDynamicRegion

      public void destroyDynamicRegion(String fullRegionName) throws CacheException
      Deprecated.
      Destroys the dynamic Region in the local cache and distributes the destruction to other caches.
      Parameters:
      fullRegionName - The full path of the Region to be dynamically destroyed
      Throws:
      RegionDestroyedException - if the dynamic region was never created or has already been destroyed
      CacheException

    • buildDynamicRegion

      protected void buildDynamicRegion(EntryEvent event)
      Deprecated.

    • razeDynamicRegion

      protected void razeDynamicRegion(EntryEvent event)
      Deprecated.