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Template Mode

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This article is generated by AI translation.

Template transactions follow this general pattern:

try {
    txManager.begin(propagation, isolation);

    ...

    txManager.commit();
} catch (Throwable e) {
    txManager.rollBack();
    throw e;
}

Example usage:

TransactionTemplate template = ...
Object result = template.execute(new TransactionCallback<Object>() {
    @Override
    public Object doTransaction(TransactionStatus tranStatus) throws Throwable {
        ...
        return null;
    }
});
Java 8 style
Object result = template.execute(tranStatus -> {
    return ...;
});
Run a block in a transaction and ignore the return value
template.execute((TransactionCallbackWithoutResult) tranStatus -> {
    ...
});

Rolling back​

There are two ways to roll back when using the template:

  • Throw an exception.
  • Mark the transaction for rollback via rollBack or readOnly without throwing.
Mark rollback without throwing
Object result = template.execute(new TransactionCallback<Object>() {
    public Object doTransaction(TransactionStatus tranStatus) {
        tranStatus.setReadOnly();
        // 或
        tranStatus.setRollback();

        return ...;
    }
});

Obtain a transaction manager​

From a DataSource
DataSource dataSource = ...
TransactionManager txManager = TransactionHelper.txManager(dataSource);
Via dependency injection
public class TxExample {
    // @Inject                 < Guice、Solon 和 Hasor
    // @Resource or @Autowired < Spring
    private TransactionManager txManager;
    ...
}
For DI usage, see the framework-specific docs