这篇文章主要介绍“sharding-jdbc中XATransactionManager的用法”，在日常操作中，相信很多人在sharding-jdbc中XATransactionManager的用法问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答”sharding-jdbc中XATransactionManager的用法”的疑惑有所帮助！接下来，请跟着小编一起来学习吧！
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本文主要研究一下sharding-jdbc的XATransactionManager
incubator-shardingsphere-4.0.0-RC1/sharding-transaction/sharding-transaction-2pc/sharding-transaction-xa/sharding-transaction-xa-spi/src/main/java/org/apache/shardingsphere/transaction/xa/spi/XATransactionManager.java
public interface XATransactionManager extends AutoCloseable {
/**
* Initialize XA transaction manager.
*/
void init();
/**
* Register recovery resource.
*
* @param dataSourceName data source name
* @param xaDataSource XA data source
*/
void registerRecoveryResource(String dataSourceName, XADataSource xaDataSource);
/**
* Remove recovery resource.
*
* @param dataSourceName data source name
* @param xaDataSource XA data source
*/
void removeRecoveryResource(String dataSourceName, XADataSource xaDataSource);
/**
* Enlist single XA resource.
*
* @param singleXAResource single XA resource
*/
void enlistResource(SingleXAResource singleXAResource);
/**
* Get transaction manager.
*
* @return transaction manager
*/
TransactionManager getTransactionManager();
}XATransactionManager继承了AutoCloseable接口，它定义了init、registerRecoveryResource、removeRecoveryResource、enlistResource、getTransactionManager方法
incubator-shardingsphere-4.0.0-RC1/sharding-transaction/sharding-transaction-2pc/sharding-transaction-xa/sharding-transaction-xa-core/src/main/java/org/apache/shardingsphere/transaction/xa/manager/atomikos/AtomikosTransactionManager.java
public final class AtomikosTransactionManager implements XATransactionManager {
private final UserTransactionManager transactionManager = new UserTransactionManager();
private final UserTransactionService userTransactionService = new UserTransactionServiceImp();
@Override
public void init() {
userTransactionService.init();
}
@Override
public void registerRecoveryResource(final String dataSourceName, final XADataSource xaDataSource) {
userTransactionService.registerResource(new AtomikosXARecoverableResource(dataSourceName, xaDataSource));
}
@Override
public void removeRecoveryResource(final String dataSourceName, final XADataSource xaDataSource) {
userTransactionService.removeResource(new AtomikosXARecoverableResource(dataSourceName, xaDataSource));
}
@Override
@SneakyThrows
public void enlistResource(final SingleXAResource xaResource) {
transactionManager.getTransaction().enlistResource(xaResource);
}
@Override
public TransactionManager getTransactionManager() {
return transactionManager;
}
@Override
public void close() {
userTransactionService.shutdown(true);
}
}AtomikosTransactionManager实现了XATransactionManager接口，它内置了UserTransactionManager、UserTransactionServiceImp属性
init方法执行userTransactionService.init()；registerRecoveryResource方法执行userTransactionService.registerResource(new AtomikosXARecoverableResource(dataSourceName, xaDataSource))；removeRecoveryResource方法执行userTransactionService.removeResource(new AtomikosXARecoverableResource(dataSourceName, xaDataSource))
enlistResource执行transactionManager.getTransaction().enlistResource(xaResource)；getTransactionManager返回UserTransactionManager；close方法执行userTransactionService.shutdown(true)
incubator-shardingsphere-4.0.0-RC1/sharding-transaction/sharding-transaction-2pc/sharding-transaction-xa/sharding-transaction-xa-core/src/test/java/org/apache/shardingsphere/transaction/xa/manager/atomikos/AtomikosTransactionManagerTest.java
@RunWith(MockitoJUnitRunner.class)
public final class AtomikosTransactionManagerTest {
private AtomikosTransactionManager atomikosTransactionManager = new AtomikosTransactionManager();
@Mock
private UserTransactionManager userTransactionManager;
@Mock
private UserTransactionService userTransactionService;
@Mock
private XADataSource xaDataSource;
@Before
public void setUp() {
ReflectiveUtil.setProperty(atomikosTransactionManager, "transactionManager", userTransactionManager);
ReflectiveUtil.setProperty(atomikosTransactionManager, "userTransactionService", userTransactionService);
}
@Test
public void assertInit() {
atomikosTransactionManager.init();
verify(userTransactionService).init();
}
@Test
public void assertRegisterRecoveryResource() {
atomikosTransactionManager.registerRecoveryResource("ds1", xaDataSource);
verify(userTransactionService).registerResource(any(AtomikosXARecoverableResource.class));
}
@Test
public void assertRemoveRecoveryResource() {
atomikosTransactionManager.removeRecoveryResource("ds1", xaDataSource);
verify(userTransactionService).removeResource(any(AtomikosXARecoverableResource.class));
}
@Test
public void assertEnListResource() throws Exception {
SingleXAResource singleXAResource = mock(SingleXAResource.class);
Transaction transaction = mock(Transaction.class);
when(userTransactionManager.getTransaction()).thenReturn(transaction);
atomikosTransactionManager.enlistResource(singleXAResource);
verify(transaction).enlistResource(singleXAResource);
}
@Test
public void assertTransactionManager() {
assertThat(atomikosTransactionManager.getTransactionManager(), CoreMatchers.is(userTransactionManager));
}
@Test
public void assertClose() {
atomikosTransactionManager.close();
verify(userTransactionService).shutdown(true);
}
} 这里mock了userTransactionManager、userTransactionService、xaDataSource
XATransactionManager继承了AutoCloseable接口，它定义了init、registerRecoveryResource、removeRecoveryResource、enlistResource、getTransactionManager方法
到此，关于“sharding-jdbc中XATransactionManager的用法”的学习就结束了，希望能够解决大家的疑惑。理论与实践的搭配能更好的帮助大家学习，快去试试吧！若想继续学习更多相关知识，请继续关注创新互联网站，小编会继续努力为大家带来更多实用的文章！
