Package org.springframework.jdbc.datasource

Class DataSourceTransactionManager

java.lang.Object
org.springframework.transaction.support.AbstractPlatformTransactionManager
org.springframework.jdbc.datasource.DataSourceTransactionManager
All Implemented Interfaces:
Serializable, org.springframework.beans.factory.InitializingBean, org.springframework.transaction.ConfigurableTransactionManager, org.springframework.transaction.PlatformTransactionManager, org.springframework.transaction.support.ResourceTransactionManager, org.springframework.transaction.TransactionManager
Direct Known Subclasses:
JdbcTransactionManager
public class DataSourceTransactionManager extends org.springframework.transaction.support.AbstractPlatformTransactionManager implements org.springframework.transaction.support.ResourceTransactionManager, org.springframework.beans.factory.InitializingBean
PlatformTransactionManager implementation for a single JDBC DataSource. This class is capable of working in any environment with any JDBC driver, as long as the setup uses a javax.sql.DataSource as its Connection factory mechanism. Binds a JDBC Connection from the specified DataSource to the current thread, potentially allowing for one thread-bound Connection per DataSource.

Note: The DataSource that this transaction manager operates on needs to return independent Connections. The Connections typically come from a connection pool but the DataSource must not return specifically scoped or constrained Connections. This transaction manager will associate Connections with thread-bound transactions, according to the specified propagation behavior. It assumes that a separate, independent Connection can be obtained even during an ongoing transaction.

Application code is required to retrieve the JDBC Connection via DataSourceUtils.getConnection(DataSource) instead of a standard EE-style DataSource.getConnection() call. Spring classes such as JdbcTemplate use this strategy implicitly. If not used in combination with this transaction manager, the DataSourceUtils lookup strategy behaves exactly like the native DataSource lookup; it can thus be used in a portable fashion.

Alternatively, you can allow application code to work with the standard EE-style lookup pattern DataSource.getConnection(), for example for legacy code that is not aware of Spring at all. In that case, define a TransactionAwareDataSourceProxy for your target DataSource, and pass that proxy DataSource to your DAOs which will automatically participate in Spring-managed transactions when accessing it.

Supports custom isolation levels, and timeouts which get applied as appropriate JDBC statement timeouts. To support the latter, application code must either use JdbcTemplate, call DataSourceUtils.applyTransactionTimeout(java.sql.Statement, javax.sql.DataSource) for each created JDBC Statement, or go through a TransactionAwareDataSourceProxy which will create timeout-aware JDBC Connections and Statements automatically.

Consider defining a LazyConnectionDataSourceProxy for your target DataSource, pointing both this transaction manager and your DAOs to it. This will lead to optimized handling of "empty" transactions, i.e. of transactions without any JDBC statements executed. A LazyConnectionDataSourceProxy will not fetch an actual JDBC Connection from the target DataSource until a Statement gets executed, lazily applying the specified transaction settings to the target Connection.

This transaction manager supports nested transactions via the JDBC Savepoint mechanism. The "nestedTransactionAllowed" flag defaults to "true", since nested transactions will work without restrictions on JDBC drivers that support savepoints (such as the Oracle JDBC driver).

This transaction manager can be used as a replacement for the JtaTransactionManager in the single resource case, as it does not require a container that supports JTA, typically in combination with a locally defined JDBC DataSource (e.g. a Hikari connection pool). Switching between this local strategy and a JTA environment is just a matter of configuration!

As of 4.3.4, this transaction manager triggers flush callbacks on registered transaction synchronizations (if synchronization is generally active), assuming resources operating on the underlying JDBC Connection. This allows for setup analogous to JtaTransactionManager, in particular with respect to lazily registered ORM resources (e.g. a Hibernate Session).

NOTE: As of 5.3, JdbcTransactionManager is available as an extended subclass which includes commit/rollback exception translation, aligned with JdbcTemplate.

Since:
02.05.2003
Author:
Juergen Hoeller
See Also:

  • Nested Class Summary

    Nested classes/interfaces inherited from class org.springframework.transaction.support.AbstractPlatformTransactionManager

    org.springframework.transaction.support.AbstractPlatformTransactionManager.SuspendedResourcesHolder

  • Field Summary

    Fields inherited from class org.springframework.transaction.support.AbstractPlatformTransactionManager

    logger, SYNCHRONIZATION_ALWAYS, SYNCHRONIZATION_NEVER, SYNCHRONIZATION_ON_ACTUAL_TRANSACTION

  • Constructor Summary

    Constructors
    Constructor
    Description
    DataSourceTransactionManager()
    Create a new DataSourceTransactionManager instance.
    DataSourceTransactionManager(DataSource dataSource)
    Create a new DataSourceTransactionManager instance.

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    afterPropertiesSet()
     
    protected void
    doBegin(Object transaction, org.springframework.transaction.TransactionDefinition definition)
     
    protected void
    doCleanupAfterCompletion(Object transaction)
     
    protected void
    doCommit(org.springframework.transaction.support.DefaultTransactionStatus status)
     
    protected Object
    doGetTransaction()
     
    protected void
    doResume(Object transaction, Object suspendedResources)
     
    protected void
    doRollback(org.springframework.transaction.support.DefaultTransactionStatus status)
     
    protected void
    doSetRollbackOnly(org.springframework.transaction.support.DefaultTransactionStatus status)
     
    protected Object
    doSuspend(Object transaction)
     
    DataSource
    getDataSource()
    Return the JDBC DataSource that this instance manages transactions for.
    Object
    getResourceFactory()
     
    boolean
    isEnforceReadOnly()
    Return whether to enforce the read-only nature of a transaction through an explicit statement on the transactional connection.
    protected boolean
    isExistingTransaction(Object transaction)
     
    protected DataSource
    obtainDataSource()
    Obtain the DataSource for actual use.
    protected void
    prepareTransactionalConnection(Connection con, org.springframework.transaction.TransactionDefinition definition)
    Prepare the transactional Connection right after transaction begin.
    void
    setDataSource(DataSource dataSource)
    Set the JDBC DataSource that this instance should manage transactions for.
    void
    setEnforceReadOnly(boolean enforceReadOnly)
    Specify whether to enforce the read-only nature of a transaction (as indicated by TransactionDefinition.isReadOnly()) through an explicit statement on the transactional connection: "SET TRANSACTION READ ONLY" as understood by Oracle, MySQL and Postgres.
    protected RuntimeException
    translateException(String task, SQLException ex)
    Translate the given JDBC commit/rollback exception to a common Spring exception to propagate from the AbstractPlatformTransactionManager.commit(org.springframework.transaction.TransactionStatus)/AbstractPlatformTransactionManager.rollback(org.springframework.transaction.TransactionStatus) call.

    Methods inherited from class org.springframework.transaction.support.AbstractPlatformTransactionManager

    commit, determineTimeout, getDefaultTimeout, getTransaction, getTransactionExecutionListeners, getTransactionSynchronization, invokeAfterCompletion, isFailEarlyOnGlobalRollbackOnly, isGlobalRollbackOnParticipationFailure, isNestedTransactionAllowed, isRollbackOnCommitFailure, isValidateExistingTransaction, prepareForCommit, prepareSynchronization, registerAfterCompletionWithExistingTransaction, resume, rollback, setDefaultTimeout, setFailEarlyOnGlobalRollbackOnly, setGlobalRollbackOnParticipationFailure, setNestedTransactionAllowed, setRollbackOnCommitFailure, setTransactionExecutionListeners, setTransactionSynchronization, setTransactionSynchronizationName, setValidateExistingTransaction, shouldCommitOnGlobalRollbackOnly, suspend, triggerBeforeCommit, triggerBeforeCompletion, useSavepointForNestedTransaction

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    Methods inherited from interface org.springframework.transaction.ConfigurableTransactionManager

    addListener

    Methods inherited from interface org.springframework.transaction.PlatformTransactionManager

    commit, getTransaction, rollback

  • Constructor Details

    • DataSourceTransactionManager

      public DataSourceTransactionManager()
      Create a new DataSourceTransactionManager instance. A DataSource has to be set to be able to use it.
      See Also:

    • DataSourceTransactionManager

      public DataSourceTransactionManager(DataSource dataSource)
      Create a new DataSourceTransactionManager instance.
      Parameters:
      dataSource - the JDBC DataSource to manage transactions for

  • Method Details

    • setDataSource

      public void setDataSource(@Nullable DataSource dataSource)
      Set the JDBC DataSource that this instance should manage transactions for.

      This will typically be a locally defined DataSource, for example a Hikari connection pool. Alternatively, you can also manage transactions for a non-XA DataSource fetched from JNDI. For an XA DataSource, use JtaTransactionManager instead.

      The DataSource specified here should be the target DataSource to manage transactions for, not a TransactionAwareDataSourceProxy. Only data access code may work with TransactionAwareDataSourceProxy while the transaction manager needs to work on the underlying target DataSource. If there is nevertheless a TransactionAwareDataSourceProxy passed in, it will be unwrapped to extract its target DataSource.

      The DataSource passed in here needs to return independent Connections. The Connections typically come from a connection pool but the DataSource must not return specifically scoped or constrained Connections, just possibly lazily fetched.

      See Also:

    • getDataSource

      @Nullable public DataSource getDataSource()
      Return the JDBC DataSource that this instance manages transactions for.

    • obtainDataSource

      protected DataSource obtainDataSource()
      Obtain the DataSource for actual use.
      Returns:
      the DataSource (never null)
      Throws:
      IllegalStateException - in case of no DataSource set
      Since:
      5.0

    • setEnforceReadOnly

      public void setEnforceReadOnly(boolean enforceReadOnly)
      Specify whether to enforce the read-only nature of a transaction (as indicated by TransactionDefinition.isReadOnly()) through an explicit statement on the transactional connection: "SET TRANSACTION READ ONLY" as understood by Oracle, MySQL and Postgres.

      The exact treatment, including any SQL statement executed on the connection, can be customized through prepareTransactionalConnection(java.sql.Connection, org.springframework.transaction.TransactionDefinition).

      This mode of read-only handling goes beyond the Connection.setReadOnly(boolean) hint that Spring applies by default. In contrast to that standard JDBC hint, "SET TRANSACTION READ ONLY" enforces an isolation-level-like connection mode where data manipulation statements are strictly disallowed. Also, on Oracle, this read-only mode provides read consistency for the entire transaction.

      Note that older Oracle JDBC drivers (9i, 10g) used to enforce this read-only mode even for Connection.setReadOnly(true. However, with recent drivers, this strong enforcement needs to be applied explicitly, e.g. through this flag.

      Since:
      4.3.7
      See Also:

    • isEnforceReadOnly

      public boolean isEnforceReadOnly()
      Return whether to enforce the read-only nature of a transaction through an explicit statement on the transactional connection.
      Since:
      4.3.7
      See Also:

    • afterPropertiesSet

      public void afterPropertiesSet()
      Specified by:
      afterPropertiesSet in interface org.springframework.beans.factory.InitializingBean

    • getResourceFactory

      public Object getResourceFactory()
      Specified by:
      getResourceFactory in interface org.springframework.transaction.support.ResourceTransactionManager

    • doGetTransaction

      protected Object doGetTransaction()
      Specified by:
      doGetTransaction in class org.springframework.transaction.support.AbstractPlatformTransactionManager

    • isExistingTransaction

      protected boolean isExistingTransaction(Object transaction)
      Overrides:
      isExistingTransaction in class org.springframework.transaction.support.AbstractPlatformTransactionManager

    • doBegin

      protected void doBegin(Object transaction, org.springframework.transaction.TransactionDefinition definition)
      Specified by:
      doBegin in class org.springframework.transaction.support.AbstractPlatformTransactionManager

    • doSuspend

      protected Object doSuspend(Object transaction)
      Overrides:
      doSuspend in class org.springframework.transaction.support.AbstractPlatformTransactionManager

    • doResume

      protected void doResume(@Nullable Object transaction, Object suspendedResources)
      Overrides:
      doResume in class org.springframework.transaction.support.AbstractPlatformTransactionManager

    • doCommit

      protected void doCommit(org.springframework.transaction.support.DefaultTransactionStatus status)
      Specified by:
      doCommit in class org.springframework.transaction.support.AbstractPlatformTransactionManager

    • doRollback

      protected void doRollback(org.springframework.transaction.support.DefaultTransactionStatus status)
      Specified by:
      doRollback in class org.springframework.transaction.support.AbstractPlatformTransactionManager

    • doSetRollbackOnly

      protected void doSetRollbackOnly(org.springframework.transaction.support.DefaultTransactionStatus status)
      Overrides:
      doSetRollbackOnly in class org.springframework.transaction.support.AbstractPlatformTransactionManager

    • doCleanupAfterCompletion

      protected void doCleanupAfterCompletion(Object transaction)
      Overrides:
      doCleanupAfterCompletion in class org.springframework.transaction.support.AbstractPlatformTransactionManager

    • prepareTransactionalConnection

      protected void prepareTransactionalConnection(Connection con, org.springframework.transaction.TransactionDefinition definition) throws SQLException
      Prepare the transactional Connection right after transaction begin.

      The default implementation executes a "SET TRANSACTION READ ONLY" statement if the "enforceReadOnly" flag is set to true and the transaction definition indicates a read-only transaction.

      The "SET TRANSACTION READ ONLY" is understood by Oracle, MySQL and Postgres and may work with other databases as well. If you'd like to adapt this treatment, override this method accordingly.

      Parameters:
      con - the transactional JDBC Connection
      definition - the current transaction definition
      Throws:
      SQLException - if thrown by JDBC API
      Since:
      4.3.7
      See Also:

    • translateException

      protected RuntimeException translateException(String task, SQLException ex)
      Translate the given JDBC commit/rollback exception to a common Spring exception to propagate from the AbstractPlatformTransactionManager.commit(org.springframework.transaction.TransactionStatus)/AbstractPlatformTransactionManager.rollback(org.springframework.transaction.TransactionStatus) call.

      The default implementation throws a TransactionSystemException. Subclasses may specifically identify concurrency failures etc.

      Parameters:
      task - the task description (commit or rollback)
      ex - the SQLException thrown from commit/rollback
      Returns:
      the translated exception to throw, either a DataAccessException or a TransactionException
      Since:
      5.3