RegionAttributes (Apache Geode 1.8.0)
Date: 2018-11-29

org.apache.geode.cache

## Interface RegionAttributes<K,V>

-     public interface RegionAttributes<K,V>

  Defines attributes for configuring a region. These are `EvictionAttributes`, `CacheListener`, `CacheLoader`, `CacheWriter`, scope, data policy, and expiration attributes for the region itself, expiration attributes for the region entries, and whether statistics are enabled for the region and its entries. To create an instance of this interface use `AttributesFactory.createRegionAttributes()`. For compatibility rules and default values, see `AttributesFactory`.

  Note that the `RegionAttributes` are not distributed with the region.

  Since:
    GemFire 2.0
  See Also:
    `AttributesFactory`, `AttributesMutator`, `Region.getAttributes()`, `EvictionAttributes`

- - ### Method Summary

    All Methods Instance Methods Abstract Methods Deprecated Methods
    Modifier and Type | Method and Description
    --- | ---
    `java.util.Set<java.lang.String>` | `getAsyncEventQueueIds()` Returns a set of AsyncEventQueueIds added to the region
    `CacheListener<K,V>` | `getCacheListener()` Deprecated. as of GemFire 5.0, use `getCacheListeners()` instead
    `CacheListener<K,V>[]` | `getCacheListeners()` Returns an array of all the cache listeners on this attributes.
    `CacheLoader<K,V>` | `getCacheLoader()` Returns the cache loader associated with this region.
    `CacheWriter<K,V>` | `getCacheWriter()` Returns the cache writer associated with this region.
    `boolean` | `getCloningEnabled()` Returns whether or not cloning is enabled on region.
    `Compressor` | `getCompressor()` Returns the compressor used by this region's entry values.
    `boolean` | `getConcurrencyChecksEnabled()` Returns true if concurrent update checks are turned on for this region.
    `int` | `getConcurrencyLevel()` Returns the concurrencyLevel of the entries map.
    `CustomExpiry<K,V>` | `getCustomEntryIdleTimeout()` Gets the `idleTimeout` `CustomExpiry`, if any for entries in this region
    `CustomExpiry<K,V>` | `getCustomEntryTimeToLive()` Gets the `entryTimeToLive` `CustomExpiry`, if any for entries in this region
    `DataPolicy` | `getDataPolicy()` Returns the data policy for this region.
    `java.io.File[]` | `getDiskDirs()` Deprecated. as of 6.5 use `DiskStore.getDiskDirs()` instead.
    `int[]` | `getDiskDirSizes()` Deprecated. as of 6.5 use `DiskStore.getDiskDirSizes()` instead.
    `java.lang.String` | `getDiskStoreName()` Returns the name of the `DiskStore` that this region belongs to, if any.
    `DiskWriteAttributes` | `getDiskWriteAttributes()` Deprecated. as of 6.5 use `getDiskStoreName()` instead.
    `boolean` | `getEarlyAck()` Deprecated. Setting early ack no longer has any effect.
    `boolean` | `getEnableAsyncConflation()` Returns whether or not async conflation is enabled for sending messages to async peers.
    `boolean` | `getEnableBridgeConflation()` Deprecated. as of GemFire 5.0, use `getEnableSubscriptionConflation()` instead
    `boolean` | `getEnableConflation()` Deprecated. as of GemFire 5.0, use `getEnableSubscriptionConflation()` instead #
    `boolean` | `getEnableSubscriptionConflation()` Returns whether or not conflation is enabled for sending messages from a cache server to its clients.
    `ExpirationAttributes` | `getEntryIdleTimeout()` Gets the `idleTimeout` expiration attributes for entries in this region.
    `ExpirationAttributes` | `getEntryTimeToLive()` Gets the `timeToLive` expiration attributes for entries in this region.
    `EvictionAttributes` | `getEvictionAttributes()` Attributes that control the size of the `Region` using an `EvictionAlgorithm` and a `EvictionAction`.
    `java.util.Set<java.lang.String>` | `getGatewaySenderIds()` Returns a set of gatewaysenderIds
    `boolean` | `getIgnoreJTA()` Gets the flag telling a region to ignore JTA transactions.
    `boolean` | `getIndexMaintenanceSynchronous()` Returns the value of `IndexMaintenanceSynchronous` which specifies whether the region indexes are updated synchronously when a region is modified or asynchronously in a background thread.
    `int` | `getInitialCapacity()` Returns the initial capacity of the entries map.
    `java.lang.Class<K>` | `getKeyConstraint()` Returns the class that the keys in this region are constrained to.
    `float` | `getLoadFactor()` Returns the load factor of the entries map.
    `MembershipAttributes` | `getMembershipAttributes()` Deprecated. this API is scheduled to be removed
    `MirrorType` | `getMirrorType()` Deprecated. as of GemFire 5.0, use `getDataPolicy()` instead.
    `boolean` | `getMulticastEnabled()` Returns true if multicast communications are enabled for this region.
    `boolean` | `getOffHeap()` Returns whether or not this region uses off-heap memory.
    `PartitionAttributes` | `getPartitionAttributes()` Returns the `PartitionAttributes` that configure how the region is partitioned.
    `boolean` | `getPersistBackup()` Deprecated. as of GemFire 5.0, use `DataPolicy.PERSISTENT_REPLICATE` instead
    `java.lang.String` | `getPoolName()` Returns the name of the `Pool` that this region will use to communicate with servers, if any.
    `boolean` | `getPublisher()` Deprecated. as of 6.5
    `ExpirationAttributes` | `getRegionIdleTimeout()` Gets the idleTimeout expiration attributes for the region as a whole.
    `ExpirationAttributes` | `getRegionTimeToLive()` Gets the `timeToLive` expiration attributes for the region as a whole.
    `Scope` | `getScope()` Returns the scope of the region.
    `boolean` | `getStatisticsEnabled()` Returns whether the statistics are enabled for this region and its entries.
    `SubscriptionAttributes` | `getSubscriptionAttributes()` Returns the `SubscriptionAttributes` that configure how this region behaves as a subscriber to remote caches.
    `java.lang.Class<V>` | `getValueConstraint()` Returns the class that the values in this region are constrained to.
    `boolean` | `isDiskSynchronous()` Returns true if configured synchronous disk writes.
    `boolean` | `isLockGrantor()` Returns true if this member is configured to be lock grantor for the region.

- - ### Method Detail

    - #### getCacheLoader

          CacheLoader<K,V> getCacheLoader()

      Returns the cache loader associated with this region.
      Returns:
        the cache loader

    - #### getCacheWriter

          CacheWriter<K,V> getCacheWriter()

      Returns the cache writer associated with this region.
      Returns:
        the cache writer

    - #### getKeyConstraint

          java.lang.Class<K> getKeyConstraint()

      Returns the class that the keys in this region are constrained to.
      Returns:
        the `Class` the keys must be an `instanceof`

    - #### getValueConstraint

          java.lang.Class<V> getValueConstraint()

      Returns the class that the values in this region are constrained to.
      Returns:
        the `Class` the values must be an `instanceof`

    - #### getRegionTimeToLive

          ExpirationAttributes getRegionTimeToLive()

      Gets the `timeToLive` expiration attributes for the region as a whole. Default is 0 which indicates that no expiration of this type will happen.
      Returns:
        the timeToLive expiration attributes for this region

    - #### getRegionIdleTimeout

          ExpirationAttributes getRegionIdleTimeout()

      Gets the idleTimeout expiration attributes for the region as a whole. Default is 0 which indicates that no expiration of this type will happen. Note that the XML element that corresponds to this method "region-idle-time", does not include "out" in its name.
      Returns:
        the IdleTimeout expiration attributes for this region

    - #### getEntryTimeToLive

          ExpirationAttributes getEntryTimeToLive()

      Gets the `timeToLive` expiration attributes for entries in this region. Default is 0 which indicates that no expiration of this type is set.
      Returns:
        the timeToLive expiration attributes for entries in this region

    - #### getEntryIdleTimeout

          ExpirationAttributes getEntryIdleTimeout()

      Gets the `idleTimeout` expiration attributes for entries in this region. Default is 0 which indicates that no expiration of this type is set. Note that the XML element that corresponds to this method "entry-idle-time", does not include "out" in its name.
      Returns:
        the idleTimeout expiration attributes for entries in this region

    - #### getCustomEntryTimeToLive

          CustomExpiry<K,V> getCustomEntryTimeToLive()

      Gets the `entryTimeToLive` `CustomExpiry`, if any for entries in this region
      Returns:
        the entryTimeToLive CustomExpiry for entries in this region

    - #### getCustomEntryIdleTimeout

          CustomExpiry<K,V> getCustomEntryIdleTimeout()

      Gets the `idleTimeout` `CustomExpiry`, if any for entries in this region
      Returns:
        the idleTimeout CustomExpiry for entries in this region

    - #### getIgnoreJTA

          boolean getIgnoreJTA()

      Gets the flag telling a region to ignore JTA transactions. Default value is set to false.
      Since:
        GemFire 5.0

    - #### getMirrorType

          @Deprecated
          MirrorType getMirrorType()

      Deprecated. as of GemFire 5.0, use `getDataPolicy()` instead.
      Returns the type of mirroring for this region.
      Returns:
        the region's `MirrorType`

    - #### getDataPolicy

          DataPolicy getDataPolicy()

      Returns the data policy for this region. Default value of DataPolicy is set to 'Normal'. Please refer the gemfire documentation for more details on this.
      Returns:
        the region's `DataPolicy`
      Since:
        GemFire 5.0

    - #### getScope

          Scope getScope()

      Returns the scope of the region. Default scope is DISTRIBUTED_NO_ACK. Please refer the gemfire documentation for more details on this.
      Returns:
        the region's `Scope`

    - #### getEvictionAttributes

          EvictionAttributes getEvictionAttributes()

      Attributes that control the size of the `Region` using an `EvictionAlgorithm` and a `EvictionAction`.
      Returns:
        the region's EvictionAttributes

    - #### getCacheListener

          @Deprecated
          CacheListener<K,V> getCacheListener()

      Deprecated. as of GemFire 5.0, use `getCacheListeners()` instead
      Returns the cache listener for the region.
      Returns:
        the region's `CacheListener`
      Throws:
        `java.lang.IllegalStateException` - if more than one cache listener exists on this attributes

    - #### getCacheListeners

          CacheListener<K,V>[] getCacheListeners()

      Returns an array of all the cache listeners on this attributes. Modifications to the returned array will not effect the attributes.
      Returns:
        the region's `CacheListener`s; an empty array if no listeners
      Since:
        GemFire 5.0

    - #### getInitialCapacity

          int getInitialCapacity()

      Returns the initial capacity of the entries map. Default is 16.
      Returns:
        the initial capacity of the entries map
      See Also:
        `HashMap`

    - #### getLoadFactor

          float getLoadFactor()

      Returns the load factor of the entries map. Default is 0.75.
      Returns:
        the load factor of the entries map
      See Also:
        `HashMap`

    - #### isLockGrantor

          boolean isLockGrantor()

      Returns true if this member is configured to be lock grantor for the region. Result will always be false if the scope is not `Scope.GLOBAL`.

      This attribute does not indicate whether or not this member is currently lock grantor. It only indicates that at the time of region creation, this member should attempt to become lock grantor. Default value is false.

      Returns:
        true if this member is configured to be lock grantor for the region
      See Also:
        `AttributesFactory`, `Region.becomeLockGrantor()`

    - #### getMulticastEnabled

          boolean getMulticastEnabled()

      Returns true if multicast communications are enabled for this region. Multicast must also be enabled in the DistributedSystem. Default value is set to false.
      Returns:
        true if this region is configured to allow use of multicast for distributed messaging
      Since:
        GemFire 5.0
      See Also:
        `AttributesFactory.setMulticastEnabled(boolean)`

    - #### getConcurrencyLevel

          int getConcurrencyLevel()

      Returns the concurrencyLevel of the entries map. Default is 16.
      Returns:
        the concurrencyLevel
      See Also:
        `AttributesFactory`

    - #### getPersistBackup

          @Deprecated
          boolean getPersistBackup()

      Deprecated. as of GemFire 5.0, use `DataPolicy.PERSISTENT_REPLICATE` instead
      Returns whether or not a persistent backup should be made of the region (as opposed to just writing the overflow data to disk).
      Since:
        GemFire 3.2

    - #### getDiskWriteAttributes

          @Deprecated
          DiskWriteAttributes getDiskWriteAttributes()

      Deprecated. as of 6.5 use `getDiskStoreName()` instead.
      Returns the `DiskWriteAttributes` that configure how the region is written to disk.
      Since:
        GemFire 3.2

    - #### getDiskDirs

          @Deprecated
          java.io.File[] getDiskDirs()

      Deprecated. as of 6.5 use `DiskStore.getDiskDirs()` instead.
      Returns the directories to which the region's data are written. If multiple directories are used, GemFire will attempt to distribute the data evenly amongst them.
      Since:
        GemFire 3.2

    - #### getIndexMaintenanceSynchronous

          boolean getIndexMaintenanceSynchronous()

      Returns the value of `IndexMaintenanceSynchronous` which specifies whether the region indexes are updated synchronously when a region is modified or asynchronously in a background thread. Default value is true.
      Since:
        GemFire 4.0

    - #### getPartitionAttributes

          PartitionAttributes getPartitionAttributes()

      Returns the `PartitionAttributes` that configure how the region is partitioned.
      Since:
        GemFire 5.0

    - #### getMembershipAttributes

          MembershipAttributes getMembershipAttributes()

      Deprecated. this API is scheduled to be removed
      Returns the `MembershipAttributes` that configure required roles for reliable access to the region.

    - #### getSubscriptionAttributes

          SubscriptionAttributes getSubscriptionAttributes()

      Returns the `SubscriptionAttributes` that configure how this region behaves as a subscriber to remote caches.
      Since:
        GemFire 5.0

    - #### getStatisticsEnabled

          boolean getStatisticsEnabled()

      Returns whether the statistics are enabled for this region and its entries. Default is false.
      Returns:
        true if statistics are enabled

    - #### getEarlyAck

          @Deprecated
          boolean getEarlyAck()

      Deprecated. Setting early ack no longer has any effect.
      Returns whether or not acks are sent after an update is processed.
      Returns:
        True if acks are sent after updates are processed; false if acks are sent before updates are processed.
      Since:
        GemFire 4.1

    - #### getPublisher

          boolean getPublisher()

      Deprecated. as of 6.5
      Returns whether or not this region is a publisher. Publishers are regions on which distributed write operations are done.
      Returns:
        True if a publisher; false if not (default).
      Since:
        GemFire 4.2.3

    - #### getEnableConflation

          @Deprecated
          boolean getEnableConflation()

      Deprecated. as of GemFire 5.0, use `getEnableSubscriptionConflation()` instead #
      Returns whether or not conflation is enabled for sending messages from a cache server to its clients. Note: This parameter is only valid for cache server to client communication. It has no effect in peer to peer communication.
      Returns:
        True if conflation is enabled; false conflation is not enabled (default).
      Since:
        GemFire 4.2

    - #### getEnableBridgeConflation

          @Deprecated
          boolean getEnableBridgeConflation()

      Deprecated. as of GemFire 5.0, use `getEnableSubscriptionConflation()` instead
      Returns whether or not conflation is enabled for sending messages from a cache server to its clients. Note: This parameter is only valid for cache server to client communication. It has no effect in peer to peer communication.
      Returns:
        True if conflation is enabled; false conflation is not enabled (default).
      Since:
        GemFire 5.0

    - #### getEnableSubscriptionConflation

          boolean getEnableSubscriptionConflation()

      Returns whether or not conflation is enabled for sending messages from a cache server to its clients. Note: This parameter is only valid for cache server to client communication. It has no effect in peer to peer communication. Default is false.
      Returns:
        True if conflation is enabled; false conflation is not enabled (default).
      Since:
        GemFire 5.7

    - #### getEnableAsyncConflation

          boolean getEnableAsyncConflation()

      Returns whether or not async conflation is enabled for sending messages to async peers. Default is false.
      Returns:
        True if async conflation is enabled; false async conflation is not enabled (default).
      Since:
        GemFire 4.2.3

    - #### getDiskDirSizes

          int[] getDiskDirSizes()

      Deprecated. as of 6.5 use `DiskStore.getDiskDirSizes()` instead.
      Returns the sizes of the disk directories in megabytes
      Returns:
        int[] sizes of the disk directories

    - #### getPoolName

          java.lang.String getPoolName()

      Returns the name of the `Pool` that this region will use to communicate with servers, if any. Returns `null` if this region communicates with peers.
      Returns:
        the name of the client-server `Pool` this region will use for server communication; `null` is returned if the region communicates with peers.
      Since:
        GemFire 5.7

    - #### getCloningEnabled

          boolean getCloningEnabled()

      Returns whether or not cloning is enabled on region. Default is false.
      Returns:
        True if cloning is enabled; false cloning is not enabled (default).
      Since:
        GemFire 6.1

    - #### getDiskStoreName

          java.lang.String getDiskStoreName()

      Returns the name of the `DiskStore` that this region belongs to, if any. Returns `null` if this region belongs to default `DiskStore`.
      Returns:
        the name of the `DiskStore` of this region; `null` is returned if this region belongs to default `DiskStore`.
      Since:
        GemFire 6.5

    - #### isDiskSynchronous

          boolean isDiskSynchronous()

      Returns true if configured synchronous disk writes. Default is set to true.
      Returns:
        Returns true if writes to disk are synchronous and false otherwise
      Since:
        GemFire 6.5

    - #### getGatewaySenderIds

          java.util.Set<java.lang.String> getGatewaySenderIds()

      Returns a set of gatewaysenderIds

    - #### getAsyncEventQueueIds

          java.util.Set<java.lang.String> getAsyncEventQueueIds()

      Returns a set of AsyncEventQueueIds added to the region

    - #### getConcurrencyChecksEnabled

          boolean getConcurrencyChecksEnabled()

      Returns true if concurrent update checks are turned on for this region.

      When this is enabled, concurrent updates will be conflated if they are applied out of order.

      All members must set this attribute the same. Default is set to true.

      Returns:
        true if concurrent update checks are turned on
      Since:
        GemFire 7.0

    - #### getCompressor

          Compressor getCompressor()

      Returns the compressor used by this region's entry values.
      Returns:
        null if the region does not have compression enabled.
      Since:
        GemFire 8.0

    - #### getOffHeap

          boolean getOffHeap()

      Returns whether or not this region uses off-heap memory.
      Returns:
        True if a usage of off-heap memory is enabled; false if usage of off-heap memory is disabled (default).
      Since:
        Geode 1.0