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Chapter 10. Enabling APIs Declaratively
The various APIs that JBoss Data Grid provides are fully documented in the JBoss Data Grid Developer Guide; however, Administrators can enable these declaratively by adding elements to the configuration file. The following sections discuss methods on implementing the various APIs.
10.1. Batching API
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Batching allows atomicity and some characteristics of a transaction, but does not allow full-blown JTA or XA capabilities. Batching is typically lighter and cheaper than a full-blown transaction, and should be used whenever the only participant in the transaction is the JBoss Data Grid cluster. If the transaction involves multiple systems then JTA Transactions should be used. For example, consider a transaction which transfers money from one bank account to another. If both accounts are stored within the JBoss Data Grid cluster then batching could be used; however, if only one account is inside the cluster, with the second being in an external database, then distributed transactions are required.
Enabling the Batching API
Batching may be enabled on a per-cache basis by defining a transaction mode of BATCH. The following example demonstrates this:
<local-cache> <transaction mode="BATCH"/> </local-cache>
<local-cache>
<transaction mode="BATCH"/>
</local-cache>
By default invocation batching is disabled; in addition, a transaction manager is not required to use batching.
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