weblogic.transaction
Interface TransactionManager

public interface TransactionManager

extends javax.transaction.TransactionManager

Allows XA resources to register and unregister themselves with the Transaction Manager on startup. It also allows a transaction to be suspended and resumed.

Field Summary

static java.lang.String	ASYNC_TIMEOUT_DELIST A constant that is used as the name of the registration property that controls whether an enlisted resource is delisted by a different thread that is processing the transaction timeout prior to the timeout thread's invocation of XAResource.rollback.
static java.lang.String	CALL_SET_TRANSACTION_TIMEOUT A constant that is used as the name of the registration property that controls whether the transaction manager sets the resource timeout.
static java.lang.String	ENLISTMENT_DYNAMIC This enlistment mode requires the resource to dynamically enlist with the transaction manager when accessed by the application.
static java.lang.String	ENLISTMENT_STANDARD Allows an application or XAResource adaptor to register a XA resource dynamically, typically before the resource is made available to the application.
static java.lang.String	ENLISTMENT_STATIC Registering the XA resource statically means that the transaction service always enlists the resource when a transaction is attached to a thread.
static java.lang.String	ENLISTMENT_TYPE A constant that is used as the name of the resource registration property that determines the enlistment style of the resource being registered.
static java.lang.String	RECOVER_RETRY_DURATION_SECONDS A constant that is used as the name of the registration property that controls whether recover will be retried for the specified duration in seconds.
static java.lang.String	RECOVER_RETRY_INTERVAL_SECONDS A constant that is used as the name of the registration property that controls the frequency in seconds at which the recover operation is performed on the resource.

Method Summary

void	begin(java.lang.String name) Create a new transaction, set the transaction name property and associate the transaction with the current thread.
void	begin(java.lang.String name, int timeoutseconds) Create a new transaction with the specified timeout value, set the transaction name property and associate the transaction with the current thread.
void	forceResume(javax.transaction.Transaction suspendedTx) If the transaction is active, resume automatically enlists statically registered resources and associates the transaction with the thread.
javax.transaction.Transaction	forceSuspend() suspend dissociates the transaction from the thread delists enlisted resources and marks the transaction for rollback in the event of any failures (for example, while delisting statically registered resources).
javax.transaction.Transaction	getTransaction(javax.transaction.xa.Xid xid) Given an XID returns the corresponding transaction object, if any.
void	registerDynamicResource(java.lang.String name, javax.transaction.xa.XAResource xar) Allows an application or XAResource adaptor to register a XA resource dynamically, typically before the resource is made available to the application.
void	registerResource(java.lang.String name, javax.transaction.xa.XAResource xar) Allows an application or XAResource adaptor to register a XA resource dynamically, typically before the resource is made available to the application.
void	registerResource(java.lang.String name, javax.transaction.xa.XAResource xar, java.util.Hashtable properties) Registers a resource under a specified name.
void	registerStaticResource(java.lang.String name, javax.transaction.xa.XAResource xar) Allows an application or XAResource adaptor to register a XA resource statically, typically before the resource is made available to the application.
void	unregisterResource(java.lang.String name) unregisterResource removes a prior resource registration.

Methods inherited from interface javax.transaction.TransactionManager

begin, commit, getStatus, getTransaction, resume, rollback, setRollbackOnly, setTransactionTimeout, suspend

Field Detail

ENLISTMENT_TYPE

public static final java.lang.String ENLISTMENT_TYPE

A constant that is used as the name of the resource registration property that determines the enlistment style of the resource being registered.

See Also:

registerResource(String, XAResource, Hashtable), ENLISTMENT_DYNAMIC, ENLISTMENT_STATIC, ENLISTMENT_STANDARD

ENLISTMENT_DYNAMIC

public static final java.lang.String ENLISTMENT_DYNAMIC

This enlistment mode requires the resource to dynamically enlist with the transaction manager when accessed by the application.

See Also:

registerResource(String, XAResource, Hashtable), ENLISTMENT_TYPE

ENLISTMENT_STATIC

public static final java.lang.String ENLISTMENT_STATIC

Registering the XA resource statically means that the transaction service always enlists the resource when a transaction is attached to a thread. In other words, the resource is not expected to enlist itself when used. It is important to emphasize the fact that once a resource is registered statically, it gets automatically enlisted in every transaction.

See Also:

registerResource(String, XAResource, Hashtable), ENLISTMENT_TYPE

ENLISTMENT_STANDARD

public static final java.lang.String ENLISTMENT_STANDARD

Allows an application or XAResource adaptor to register a XA resource dynamically, typically before the resource is made available to the application. The resource should enlist itself once with the transaction that it participates in. The Transaction Manager will perform subsequent re-enlistment of the resource in the transaction if necessary. Delistment is optional.

See Also:

registerResource(String, XAResource, Hashtable), ENLISTMENT_TYPE

RECOVER_RETRY_DURATION_SECONDS

public static final java.lang.String RECOVER_RETRY_DURATION_SECONDS

A constant that is used as the name of the registration property that controls whether recover will be retried for the specified duration in seconds. The default value is 0.

ASYNC_TIMEOUT_DELIST

public static final java.lang.String ASYNC_TIMEOUT_DELIST

A constant that is used as the name of the registration property that controls whether an enlisted resource is delisted by a different thread that is processing the transaction timeout prior to the timeout thread's invocation of XAResource.rollback.

See Also:

registerResource(String, XAResource, Hashtable)

CALL_SET_TRANSACTION_TIMEOUT

public static final java.lang.String CALL_SET_TRANSACTION_TIMEOUT

A constant that is used as the name of the registration property that controls whether the transaction manager sets the resource timeout. When set to true, the transaction manager will call XAResource.setTransactionTimeout for each resource enlistment with a value approximately equal to that of the global transaction timeout. The default value is false.

See Also:

registerResource(String, XAResource, Hashtable)

RECOVER_RETRY_INTERVAL_SECONDS

public static final java.lang.String RECOVER_RETRY_INTERVAL_SECONDS

A constant that is used as the name of the registration property that controls the frequency in seconds at which the recover operation is performed on the resource. The default value is 30. Setting this registration option has no effect unless there is a positive value assigned for the RECOVER_RETRY_DURATION_SECONDS registration option.

See Also:

RECOVER_RETRY_DURATION_SECONDS

Method Detail

registerStaticResource

public void registerStaticResource(java.lang.String name,
                                   javax.transaction.xa.XAResource xar)
                            throws javax.transaction.SystemException

Allows an application or XAResource adaptor to register a XA resource statically, typically before the resource is made available to the application. Registering the XA resource statically means that the transaction service always enlists the resource when a transaction is attached to a thread. In other words, the resource is not expected to enlist itself when used. It is important to emphasize the fact that once a resource is registered statically, it gets automatically enlisted in every transaction.

While optional, this call improves performance during an enlistResource operation. If an enlistResource call is made and the resource (or another instance of its type) has not previously been registered, the transaction service automatically registers the new resource dynamically using the class name of the resource as the name. See below for description of registering a XA resource dynamically.

The registerStaticResource method has the following parameters:

Parameters:

name - The name of the resource. This name is used in error messages as well as in the branch qualifier part of all transaction ids supplied to the resource.

xar - A reference to a XAResource object that is subsequently used to handle recovery. It can also be the weblogic extension weblogic.transaction.XAResource.

registerDynamicResource

public void registerDynamicResource(java.lang.String name,
                                    javax.transaction.xa.XAResource xar)
                             throws javax.transaction.SystemException

Allows an application or XAResource adaptor to register a XA resource dynamically, typically before the resource is made available to the application. Registering the XA resource dynamically means that the transaction service does not enlist the resource at all. In other words, the resource is expected to enlist itself before every usage appropriately.

While optional, this call improves performance during an enlistResource operation. If an enlistResource call is made and the resource (or another instance of its type) has not previously been registered, the transaction service automatically registers the new resource dynamically using the class name of the resource as the name. See below for description of registering a XA resource dynamically.

The registerDynamicResource method has the following parameters:

Parameters:

name - The name of the resource. This name is used in error messages as well as in the branch qualifier part of all transaction ids supplied to the resource.

xar - A reference to a XAResource object that is subsequently used to handle recovery. It can also be the weblogic extension weblogic.transaction.XAResource.

registerResource

public void registerResource(java.lang.String name,
                             javax.transaction.xa.XAResource xar)
                      throws javax.transaction.SystemException

Allows an application or XAResource adaptor to register a XA resource dynamically, typically before the resource is made available to the application. The resource should enlist itself once with the transaction that it participates in. The Transaction Manager will perform subsequent re-enlistment of the resource in the transaction if necessary. Delistment is optional.

While optional, this call improves performance during an enlistResource operation. If an enlistResource call is made and the resource (or another instance of its type) has not previously been registered, the transaction service automatically registers the new resource dynamically using the class name of the resource as the name. See below for description of registering a XA resource dynamically.

The registerResource method has the following parameters:

Parameters:

name - The name of the resource. This name is used in error messages as well as in the branch qualifier part of all transaction ids supplied to the resource.

xar - A reference to a XAResource object that is subsequently used to handle recovery. It can also be the weblogic extension weblogic.transaction.XAResource.

unregisterResource

public void unregisterResource(java.lang.String name)
                        throws javax.transaction.SystemException

unregisterResource removes a prior resource registration. It is typically called when a system administrator decides not to host a resource on a particular server.

getTransaction

public javax.transaction.Transaction getTransaction(javax.transaction.xa.Xid xid)

Given an XID returns the corresponding transaction object, if any.

forceResume

public void forceResume(javax.transaction.Transaction suspendedTx)

If the transaction is active, resume automatically enlists statically registered resources and associates the transaction with the thread. It also checks to see if there's another transaction associated with the thread.

forceResume simply associates a transaction with a thread without further ado. It is used when you want to suspend a transaction in a thread and subsequently resume it without checking the state. This call is typically used by XA resource providers. Caution must be exercised when using this method because it bypasses all the sanity checks otherwise performed by resume.

The following example illustrates its use. Say, you want to make an RMI or JDBC call (or simply a call to a local object) without propagating the transaction, while ensuring that code after the RMI call sees the transaction in its original state. The following code illustrates the use of forceResume:

 import weblogic.transaction.TransactionManager;
 import weblogic.transaction.Transaction;

 TransactionManager tm = TxHelper.getTransaction();
 Transaction saveTx = null;
 try {
   saveTx = tm.forceSuspend();
    .. make non-transactional call ...
 } finally {
   tm.forceResume(saveTx);
 }
 

Weblogic rmi supports a marker interface called "NonTransactionRemote" and an rmi compiler option "-nontransactional". For those remote interfaces extending this interface (or by using the rmic command-line option) the complier inserts this boiler-plate code in the RMI stub.

See Also:

forceSuspend

public javax.transaction.Transaction forceSuspend()

suspend dissociates the transaction from the thread delists enlisted resources and marks the transaction for rollback in the event of any failures (for example, while delisting statically registered resources). forceSuspend merely dissociates the transaction from the thread; it doesn't delist resources, nor does it throw any exceptions.

begin

public void begin(java.lang.String name)
           throws javax.transaction.NotSupportedException,
                  javax.transaction.SystemException

Create a new transaction, set the transaction name property and associate the transaction with the current thread.

Parameters:

name - The descriptive name to be associated with the new transaction.

Throws:

javax.transaction.NotSupportedException - Thrown if the thread is already associated with a transaction.

javax.transaction.SystemException - Thrown if the transaction manager encounters an unexpected error condition.

See Also:

Transaction.setName(String)

begin

public void begin(java.lang.String name,
                  int timeoutseconds)
           throws javax.transaction.NotSupportedException,
                  javax.transaction.SystemException

Create a new transaction with the specified timeout value, set the transaction name property and associate the transaction with the current thread.

Parameters:

name - The descriptive name to be associated with the new transaction.

timeoutseconds - The timeout value for the transaction. This value will override the default timeout value associated with the current thread. If a value of zero is specified the default timeout will be used.

Throws:

javax.transaction.NotSupportedException - Thrown if the thread is already associated with a transaction.

javax.transaction.SystemException - Thrown if the transaction manager encounters an unexpected error condition.

See Also:

Transaction.setName(String)

registerResource

public void registerResource(java.lang.String name,
                             javax.transaction.xa.XAResource xar,
                             java.util.Hashtable properties)
                      throws javax.transaction.SystemException

Registers a resource under a specified name. The enlistment type and other behavioral options for the resource may be specified.

Parameters:

name - The name of the resource. This name is used in error messages as well as in the branch qualifier part of all transaction ids supplied to the resource.

xar - A reference to a XAResource object that is subsequently used to handle recovery. It can also be the weblogic extension weblogic.transaction.XAResource.

properties - Properties that control how the resource will be controlled by the transaction manager.

See Also:

ENLISTMENT_TYPE, ENLISTMENT_DYNAMIC, ENLISTMENT_STATIC, ENLISTMENT_STANDARD, INTERLEAVING_ENLISTMENTS, CALL_SET_TRANSACTION_TIMEOUT, LOCAL_ASSIGNMENT_OF_REMOTE_RESOURCES, THREAD_AFFINITY