sharding-jdbc中XATransactionManager的用法

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！

序

本文主要研究一下sharding-jdbc的XATransactionManager

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

AtomikosTransactionManager

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)

AtomikosTransactionManagerTest

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

小结

XATransactionManager继承了AutoCloseable接口，它定义了init、registerRecoveryResource、removeRecoveryResource、enlistResource、getTransactionManager方法

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