org.multiverse.api.callables
Interface TxnDoubleCallable

public interface TxnDoubleCallable

A transactional callable contains the logic that needs to be executed transactionally and normally is executed by the TxnExecutor. This transactional callable is optimized for retuning a primitive type: double. Using this TxnDoubleCallable instead of the TxnCallable is that no object wrapper needs to be created and there is no reason to deal with a potential null value.

Author:

Peter Veentjer.

Method Summary

double

call(Txn txn) Executes the callable.

Method Detail

call

double call(Txn txn)
            throws Exception

Executes the callable.

Parameters:

txn - the Transaction. Depending on the txn PropagationLevel, this could be null.

Returns:

the result of the execution.

Throws:

Exception