25.2. Configure Transactions

Procedure 25.1. Configure Transactions in Library Mode (XML Configuration)

<namedCache <!-- Additional configuration information here -->>
	<transaction <!-- Additional configuration information here --> >
	<locking <!-- Additional configuration information here --> >
	<versioning enabled="{true,false}" 
		    versioningScheme="{NONE|SIMPLE}"/>
        <!-- Additional configuration information here -->
</namedCache>

<namedCache <!-- Additional configuration information here -->>
	<transaction <!-- Additional configuration information here --> >
	<locking <!-- Additional configuration information here --> >
	<versioning enabled="{true,false}" 
		    versioningScheme="{NONE|SIMPLE}"/>
        <!-- Additional configuration information here -->
</namedCache>

1. Set the versioning parameter's enabled parameter to true.
2. Set the versioningScheme parameter to either NONE or SIMPLE to set the versioning scheme used.

Procedure 25.2. Configure Transactions in Library Mode (Programmatic Configuration)

1. Configuration config = new ConfigurationBuilder()/* ... */.transaction()
           .transactionMode(TransactionMode.TRANSACTIONAL)
           .transactionManagerLookup(new GenericTransactionManagerLookup())
           .lockingMode(LockingMode.OPTIMISTIC)
           .useSynchronization(true)
           .recovery()
               .recoveryInfoCacheName("anotherRecoveryCacheName").build();

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   1. Set the transaction mode.
   2. Select and set a lookup class. See the table below this procedure for a list of available lookup classes.
   3. The lockingMode value determines whether optimistic or pessimistic locking is used. If the cache is non-transactional, the locking mode is ignored. The default value is OPTIMISTIC.
   4. The useSynchronization value configures the cache to register a synchronization with the transaction manager, or register itself as an XA resource. The default value is true (use synchronization).
   5. The recovery parameter enables recovery for the cache when set to true.
      The recoveryInfoCacheName sets the name of the cache where recovery information is held. The default name of the cache is specified by RecoveryConfiguration.DEFAULT_RECOVERY_INFO_CACHE.

2. Configure Write Skew Check

   The writeSkew check determines if a modification to the entry from a different transaction should roll back the transaction. Write skew set to true requires isolation_level set to REPEATABLE_READ. The default value for writeSkew and isolation_level are false and READ_COMMITTED respectively.

   Configuration config = new ConfigurationBuilder()/* ... */.locking()
           .isolationLevel(IsolationLevel.REPEATABLE_READ).writeSkewCheck(true);

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3. Configure Entry Versioning

   For clustered caches, enable write skew check by enabling entry versioning and setting its value to SIMPLE.

   Configuration config = new ConfigurationBuilder()/* ... */.versioning()
           .enable()
           .scheme(VersioningScheme.SIMPLE);

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