transaction manager

With the existence of the Transaction Manager, that is often part of an Application Server, there is no longer a Two-Tier architecture.

The transaction manager should be able to continue with transactions that do not involve the failed resource manager.

The transaction manager first asks each enlisted resource manager if it is prepared to commit the transaction.

The transaction manager should be able to detect the availability of the resource manager as it becomes available.

The resource manager then responds with a final "committed" flow, which indicates to the transaction manager that it is no longer in-doubt.

In the case of a promoted transaction, the transaction manager listens to the transaction outcome and overrides the response being sent.

The unit of work must be managed by an external transaction manager running on the same system as the client business application.

However, the desired behavior of the transaction manager would be the same even if the unit of execution was a thread.

Interface uses this method to notify the transaction manager that it cannot commit, and that the transaction should be rolled back.

The transaction manager should be able to resolve the failed transaction when the failed resource manager becomes available.

This method is called by the transaction manager after the transaction is committed or rolled back.

This article looks at the expected behavior of a transaction manager when a resource manager fails.

The behavior of the transaction manager should not be affected by the state change of the resource manager.

As such, the transaction manager keeps waiting for a response, and maintains information relevant to this transaction.

And methods to notify the transaction manager whether the resource manager needs to create another enlistment during the Prepare phase.

Facilitates communication between an enlisted transaction participant and the transaction manager during the final phase of the transaction.

As the thread passes through the collaborating objects, the transaction manager uses the thread's transaction context to perform all work.

Note that, after this method is called, the enlisted participant receives no further notifications from the transaction manager.

Resource managers reconnect to the transaction manager and perform recovery to determine the outcome of pending transactions.

In Part 1, we talked about how multiple resource managers can be enlisted in a single transaction, coordinated by a transaction manager.

The deserialization of a transaction fails because the transaction manager cannot be contacted .

Class to inform the transaction manager if the transaction is to be committed or rolled back.

Should the transaction manager fail during the commit processing, the transaction may be left in-doubt in the resource managers.

Consider a measurement of a transaction manager's total number of commits.

This transaction manager failed to establish a connection with another TIP transaction manager.

The Whereabouts contains an address that describes the location of a transaction manager.

Interface uses this method to notify the transaction manager that the transaction should be committed.

Interface uses this method to notify the transaction manager that the transaction is in doubt.

This configuration would make Spring automatically pick up your application server's transaction manager.

The transaction manager asks all the resource managers to prepare to commit recoverable resources (prepare).

By enlisting, the resource manager ensures that it gets callbacks from the transaction manager when the transaction commits or aborts.

The Whereabouts of the distributed transaction manager that System. Transactions uses.

Spring uses a transaction manager interface implementation to perform the actual transaction demarcation at runtime.

The Transaction Manager is actually an implementation of the javax. transaction. TransactionManager interface.

Also, if you are running an external client, make sure that your transaction manager supports the propagation of a transaction across JVMs.

If the node running the MS DTC transaction manager fails, the transaction manager is automatically restarted on another node in the cluster.

Each resource manager must provide a switch that gives the transaction manager access to the resource manager's xa_ routines.

If the resource manager can prepare, it informs the transaction manager its vote on whether to commit or abort the transaction.

The ax_ routines let a resource manager call a transaction manager; all transaction managers must provide these routines.

Method, the transaction manager then notifies the participant when the transaction is promoted, committed, or rolled back by invoking the.

When the application commits the transaction, the transaction manager initiates the two-phase commit protocol.

This transaction manager encountered a protocol error with another TIP transaction manager.

The updates only become hardened once the transaction manager initiates the two-phase commit process.

An address that describes the location of the destination transaction manager.

The resource manager fails between prepare and commit processing, and the transaction manager detects the failure.

Object used to send a response to the transaction manager.

Desired behavior: If the XA_OPEN fails, the transaction manager should issue a warning and continue normally.

The transaction manager is expected to finish the transaction when the resource manager becomes available again.

In addition , this method only suggests the transaction manager to escalate control , but the escalation itself is not guaranteed .

All of these entities interact with the transaction manager so that your application code doesn't have to.

Thrown if the transaction manager encounters an unexpected error condition.

The Transaction Manager on the destination machine is not available.

In Listing 3, we define something called a transaction advisor object and bind the transaction manager to this advisor.

This transaction manager could not propagate a transaction from another TIP transaction manager.

The transaction-manager property holds a reference to the transaction manager bean defined in the Spring configuration file.

Can your transaction manager promise higher availability?

This parameter is required to improve performance of DB2 when operating with the particular transaction manager.

Represents a callback that is used to indicate to the transaction manager that the status of the transaction is in doubt.

If a database failure occurs, the transaction manager reports the possibility of inconsistent data from failed transactions.

Notifies the transaction manager that a resource manager recovering from failure has finished re enlisting in all unresolved transactions.

The transaction manager can either be a multi-threaded or a multi-process environment.

A request to establish a connection with the transaction manager was denied.

The transaction manager uses CORBA OTS when an EJB in one container calls an EJB in another container.

The Transaction Manager uses methods defined on the XAResource interface to coordinate the 2PC protocol across multiple resource managers.

The transaction manager doesn't support an asynchronous operation for this method.

The Transaction Manager is not available.

Because the transaction manager uses only intra-application domain calls, it yields the best performance.

These test cases present a multi-process transaction manager, and so each transaction is executed in a separate process.

There are some specific setup details that pertain to this scenario to set up the transaction manager to enable XA support.

Once prepared, a resource manager must wait until it gets a commit or abort callback from the transaction manager in phase 2.

The transaction manager also coordinates recovery activities of the resource managers when necessary, such as after a component failure.

This helps ensure the availability of the transaction manager and, to some extent, can help simplify application logic.

A distributed transaction involves a transaction manager and one or more resource managers.

The transaction manager loads the XA switch structure at run time.

A connection with the transaction manager was lost.

Represents a callback that is used to indicate to the transaction manager that the transaction should be rolled back.

In addition, the application uses a transaction manager to ensure the reliability of data exchange.

The ability to bypass the transaction manager.

The Transaction Manager returned a log full error.

A process in the transaction manager executes a DB2-related transaction.

Therefore, there is not only a direct connection to a database, but also a connection to the Transaction Manager.

Are you able to run non-XA transactions using the transaction manager after the failure and before the resource manager becomes available?

Every J2EE-compliant application server has an internal component called the Transaction Manager.

In a heterogeneous environment you will usually find a Transaction Manager that is responsible for the handling of Distributed Transactions.

(In fact, a Transaction Manager is able to perform much more workload balancing, for example).

Performance optimization for distributed transaction manager

For declarative transaction demarcation, I use the standard Spring classes along with the transaction manager bean declared above

Useful structures when working with an XA-enabled transaction manager

Applications that require two-phase commit service under a transaction manager should use

The administrator needs to grant privileges for using the Informix server with the transaction manager, as in this example

Here are some design considerations to help you make your transaction manager resilient to resource manager failures

Study on Technology of Object Transaction Manager to Support Critical Task in CORBA

On the transaction manager. This method passes on a unique

When the transaction is asked to commit, the transaction manager still sends the

If the optimization is used and the transaction manager calls the