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package javax.transaction;

/**
 *  The TransactionManager interface defines the methods that allow an
 *  application server to manage transactions on behalf of the applications.
 *  

* User applications should not use this interface directly, but use * {@link UserTransaction} insted if they need to do their own transaction * management. *

* Internally, the transaction manager associates transactions with threads, * and the methods here operate on the transaction associated with the * calling thread. * * @version $Revision$ */ public interface TransactionManager { /** * Starts a new transaction, and associate it with the calling thread. * * @throws NotSupportedException If the calling thread is already * associated with a transaction, and nested transactions are * not supported. * @throws SystemException If the transaction service fails in an * unexpected way. */ public void begin() throws NotSupportedException, SystemException; /** * Commit the transaction associated with the calling thread. * * @throws RollbackException If the transaction was marked for rollback * only, the transaction is rolled back and this exception is * thrown. * @throws IllegalStateException If the calling thread is not associated * with a transaction. * @throws SystemException If the transaction service fails in an * unexpected way. * @throws HeuristicMixedException If a heuristic decision was made and * some some parts of the transaction have been committed while * other parts have been rolled back. * @throws HeuristicRollbackException If a heuristic decision to roll * back the transaction was made. * @throws SecurityException If the caller is not allowed to commit this * transaction. */ public void commit() throws RollbackException, HeuristicMixedException, HeuristicRollbackException, SecurityException, IllegalStateException, SystemException; /** * Rolls back the transaction associated with the calling thread. * * @throws IllegalStateException If the transaction is in a state * where it cannot be rolled back. This could be because the * calling thread is not associated with a transaction, or * because it is in the * {@link Status#STATUS_PREPARED prepared state}. * @throws SecurityException If the caller is not allowed to roll back * this transaction. * @throws SystemException If the transaction service fails in an * unexpected way. */ public void rollback() throws IllegalStateException, SecurityException, SystemException; /** * Mark the transaction associated with the calling thread for rollback * only. * * @throws IllegalStateException If the transaction is in a state * where it cannot be rolled back. This could be because the * calling thread is not associated with a transaction, or * because it is in the * {@link Status#STATUS_PREPARED prepared state}. * @throws SystemException If the transaction service fails in an * unexpected way. */ public void setRollbackOnly() throws IllegalStateException, SystemException; /** * Get the status of the transaction associated with the calling thread. * * @return The status of the transaction. This is one of the * {@link Status} constants. If no transaction is associated * with the calling thread, * {@link Status#STATUS_NO_TRANSACTION} is returned. * * @throws SystemException If the transaction service fails in an * unexpected way. */ public int getStatus() throws SystemException; /** * Get the transaction associated with the calling thread. * * @return The transaction associated with the calling thread, or * null if the calling thread is not associated * with a transaction. * * @throws SystemException If the transaction service fails in an * unexpected way. */ public Transaction getTransaction() throws SystemException; /** * Change the transaction timeout for transactions started by the calling * thread with the {@link #begin()} method. * * @param seconds The new timeout value, in seconds. If this parameter * is 0, the timeout value is reset to the default * value. * * @throws SystemException If the transaction service fails in an * unexpected way. */ public void setTransactionTimeout(int seconds) throws SystemException; /** * Suspend the association the calling thread has to a transaction, * and return the suspended transaction. * When returning from this method, the calling thread is no longer * associated with a transaction. * * @return The transaction that the calling thread was associated with, * or null if the calling thread was not associated * with a transaction. * * @throws SystemException If the transaction service fails in an * unexpected way. */ public Transaction suspend() throws SystemException; /** * Resume the association of the calling thread with the given * transaction. * * @param tobj The transaction to be associated with the calling thread. * * @throws InvalidTransactionException If the argument does not represent * a valid transaction. * @throws IllegalStateException If the calling thread is already * associated with a transaction. * @throws SystemException If the transaction service fails in an * unexpected way. */ public void resume(Transaction tobj) throws InvalidTransactionException, IllegalStateException, SystemException; }





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