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IRegionTKey, TValueGet Method
Returns the value for the given key, passing the callback argument to any cache loaders or that are invoked in the operation.

Namespace: GemStone.GemFire.Cache.Generic
Assembly: Gemstone.Gemfire.Cache (in Gemstone.Gemfire.Cache.dll) Version: 9.0.6.18
Syntax
Copy
TValue Get(
	TKey key,
	Object callbackArg
)

Parameters

key
Type: TKey
key whose associated value is to be returned -- the key object must implement the Equals and GetHashCode methods.
callbackArg
Type: SystemObject
An argument passed into the CacheLoader if loader is used. Has to be Serializable (i.e. implement IGFSerializable); can be null.

Return Value

Type: TValue
value, or null if the value is not found and can't be loaded
Exceptions
ExceptionCondition
IllegalArgumentException if key is null
CacheLoaderException if CacheLoader throws an exception
CacheServerException If an exception is received from the Java cache server. Only for Native Client regions.
NotConnectedException if not connected to the GemFire system because the client cannot establish usable connections to any of the servers given to it. For pools configured with locators, if no locators are available, innerException of NotConnectedException is set to NoAvailableLocatorsException.
MessageException If the message received from server could not be handled. This will be the case when an unregistered typeId is received in the reply or reply is not well formed. More information can be found in the log.
TimeoutException if the operation timed out
RegionDestroyedException if this region has been destroyed
Remarks

For local region instance - returns the value with the specified key from the local cache only. For distributed region instance - If the value is not present locally then it is requested from the java server. If even that is unsuccessful then a local CacheLoader will be invoked if there is one.

The value returned by get is not copied, so multi-threaded applications should not modify the value directly, but should use the update methods.

Updates the [!:CacheStatistics.LastAccessedTime][!:CacheStatistics.HitCount], [!:CacheStatistics.MissCount], and [!:CacheStatistics.LastModifiedTime] (if a new value is loaded) for this region and the entry.

See Also