Practical use of transaction attribute
I want to read abt practical use of transaction attribute,any tutorial or any help?
Well the J2EE tutorial explains them:
http://docs.sun.com/app/docs/doc/819-3669/6n5sg7cm3?a=view
What do you mean by practical - a real world example? You can use NotSupported for read operations as no transaction is required, they say it improves performance, but I have never done any investigation into it.
m
Similar Messages
-
Transaction attribute in XML deployment descriptor
Hi,
I just want to know the use of transaction attributes like (Required, notSuuport etc..) are in the EJB.
What is Bean managed and container managed transaction.
How we use the transaction attributes in BMP and CMP.
and in similar fashion, the use of the same in Session beans.
..Amanmodification to the above quesion::
There are 5 different beans named as
CMP, BMP, Stateless, Stateful and MDB.
I want to know that which all transactions (CMT or BMT) can be applied for which bean?
I just got some feedback from some ppl that i cant apply BMT for CMP and BMP. if that is true then why???
if i can apply CMT for CMP and BMP then how i will modify the EJB-jar for the
method definitiion for CMP and BMP. I mean to say the method name and parameter definition. as there are only call back methods.
..Aman -
EJB + "transaction attributes" + "best practice"
hi
For EJBs, when you specify multiple transaction attributes for a single
method, is the latest attribute taken or the first?
for e.g. In Jbuilder8 in the container transaction section for an EJB,
if i were to put
Method Transaction attribute
* Required
getSomeThing() Supported
As you can see all the methods were initially given the required attribute,
and then the method getSomeThing() was given Supported. will the
getSomething() method use Required or else Supported. Secondly, will this
cause an extra overload (Transaction attributes are set and the again
reset), is it a recommended best practice?
surengetSomeThing() Supported
As you can see all the methods were initially given
the required attribute,
and then the method getSomeThing() was given
Supported. will the
getSomething() method use Required or else Supported.It will use supported.
Secondly, will this
cause an extra overload (Transaction attributes are
set and the againIt won't cause extra overload.
reset), is it a recommended best practice?It really depends on your needs - what you're trying to achieve. There is no best practice for that it depends on the application you're building.
Regards,
Dimitar -
Hi All!
I try to play with cmp entity beans. All I try to do is find instance and call one from the methods.
When I use transaction attribute another than "Required", I get exception 25222. Application module creation exception.
If I change attribute to "Required New" then I get error while bean try to UPDATE record.
I can't understand why this update appear on findByPrimaryKey!
Can any body give some information on JBO behavior?
Mike
nullI do one more test and found
UPDATE exception raised when I have foreign key in table. If I use only plain fild evething is ok. If add to entity foreign key field container raise exception when it try to update record. -
Is there a special reason why NotSupported and Required are the only two supported transaction attributes? I understand that MDBs cannot have a client-initiated transaction, but there are other transaction attributes that indicate the same thing.
If an MDB wants to indicate that it should not execute in a transaction, why can't it indicate Never or Supports in addition to NotSupported? In the case of no client-initiated transaction, all three result in the annotated method occuring under no transaction.
If an MDB wants to indicate that it should execute in a transaction, why can't it indicate RequiresNew in addition to Required? Again, in the case of no client-initiated transaction, both result in the annotated method occuring under a transaction.
The Mandatory attribute throws an exception if there is no client-initiated transaction, so clearly that is never appropriate for MDBs. But I am confused as to why the other transaction attributes cannot be used as indicated above.
Please clarify why the specification indicates this about MDB transaction attributes...
Thanks.When ejb webservice endpoints were introduced in J2EE 1.4 there was no support for
propagation of transaction context over a webservice invocation. Both the JSR 109
spec and the EJB 2.1 spec prohibited the use of MANDATORY on an ejb web
service endpoint since using it was likely a developer error.
In Java EE 5 the restriction against MANDATORY for ejb web service endpoints was removed in the
EJB 3.0 spec. There's still no requirement that transactions be able to flow with web service
invocations but there are some products that support it so the ejb container is no longer
required to throw an exception in that case.
--ken -
why transaction attributes are not present in JDBC ?
EJB 2.0 Specification includes six defined transaction attributes but JDBC does not carry these . Even the latest JDBC spec does not carry these attributes . Why ?gimbal2 wrote:
YoungWinston wrote:
user575089 wrote:
EJB 2.0 Specification includes six defined transaction attributes but JDBC does not carry these . Even the latest JDBC spec does not carry these attributes . Why ?I don't know, but I suspect that the transaction attributes are only relevant to EJB. JDBC can be used to execute any piece of SQL on a database, and therefore doesn't have any "model" associated with it (although it does allow you to disable auto-commit). I'm no EJB expert, but I''d suspect that it probably does have a transaction model.
WinstonYes, with exactly six transaction attributes. That is because those attributes are not related to JDBC but to container managed transactions; in other words EJB tech.correct. These are available in EJB tech. However,my point was these are evolved because of necessity ... is not it ? -
Transaction Attribute issue in weblogic 8.1
Hi,
I have problem with the transaction attribute of my session bean in Weblogic8.1 and SQLServer. Following is the description.
I have two beans, say SampleBeanOne and SampleBeanTwo. The transaction attribute of SampleBeanOne is "Required" and that of the SampleBeanTwo is "RequiresNew".
In SampleBeanOne i am trying the execute the a batch of insert quires using PreparedStatement.addBach() and PreparedStatement.executBatch() in a loop that runs of 5 times.
Inside the loop i am calling a method in SampleBeanTwo to get the next sequence. In that method i am updating the squence and selecting the new value.
Now the problem i am facing is that when i call the executeBatch() in the PreparedStatement only the final insert statement added to the batch is called and the insert statement added gets vanished.
If i change the transaction attribute of the SampleBeanTwo to "Required" the code is working fine. But i can't do that since the SampleBeanTwo is accessed throught out my application.
The same peace of code is working properly with Websphere5 and SQL server combination.
Kindly help me out in this issue.
RegardsHi
ThanX for your reply. I raised the issue to the BEA support, they said that the issue is the driver that i am using. It got resolved when i tried with the BEA provided driver. They call it the BEA branded driver for SQL Server.
Regards
Muthu -
hi,erveryone,
one difficult question need help.
Environment: WLS8.1sp2 + WLI8.1sp2 + ORACLE9i + solaris9
when I started archiver manually,just for a while, wli system generated about 40,000 JMS messages in
wli.internal.worklist.timer.queue,and consume the great mass of system resource of Database server,I had to stop these
archive processes immediately to keep other applicaitons which using the same database running normal. I did so by
following steps:
(1) in WLI console, delete wli.internal.worklist.timer.queue;
(2) in WLI console, reconstruct wli.internal.worklist.timer.queue;
(3) restart wli server.
after server was restarted, wli server output endless and repeatly exception to log file ,the typical exception was:
####<May 8, 2005 3:08:26 PM CST> <Info> <EJB> <app01> <jcwliserver> <ExecuteThread: '54' for queue:
'weblogic.kernel.Default'> <<anonymous>> <BEA1-54B26B551CC1A8856F80> <BEA-010049> <EJB Exception in method: remove:
java.sql.SQLException: Transaction rolled back: Unknown reason.
java.sql.SQLException: Transaction rolled back: Unknown reason
at weblogic.jdbc.jta.DataSource.enlist(DataSource.java:1299)
at weblogic.jdbc.jta.DataSource.refreshXAConnAndEnlist(DataSource.java:1250)
at weblogic.jdbc.jta.DataSource.getConnection(DataSource.java:385)
at weblogic.jdbc.jta.DataSource.connect(DataSource.java:343)
at weblogic.jdbc.common.internal.RmiDataSource.getConnection(RmiDataSource.java:305)
at weblogic.ejb20.cmp.rdbms.RDBMSPersistenceManager.getConnection(RDBMSPersistenceManager.java:2247)
at
com.bea.wli.worklist.beans.entity.ListenerBean_1nsp14__WebLogic_CMP_RDBMS.__WL_loadGroup0(ListenerBean_1nsp14__WebLogic_CMP_R
DBMS.java:1055)
at
com.bea.wli.worklist.beans.entity.ListenerBean_1nsp14__WebLogic_CMP_RDBMS.__WL_setTaskBean_listeners(ListenerBean_1nsp14__Web
Logic_CMP_RDBMS.java:596)
at
com.bea.wli.worklist.beans.entity.ListenerBean_1nsp14__WebLogic_CMP_RDBMS.__WL_setTaskBean_listeners(ListenerBean_1nsp14__Web
Logic_CMP_RDBMS.java:584)
at
com.bea.wli.worklist.beans.entity.ListenerBean_1nsp14__WebLogic_CMP_RDBMS.ejbRemove(ListenerBean_1nsp14__WebLogic_CMP_RDBMS.j
ava:2423)
at weblogic.ejb20.manager.DBManager.remove(DBManager.java:1318)
at weblogic.ejb20.internal.EntityEJBLocalHome.remove(EntityEJBLocalHome.java:214)
at
com.bea.wli.worklist.beans.entity.ListenerBean_1nsp14_LocalHomeImpl.remove(ListenerBean_1nsp14_LocalHomeImpl.java:131)
at
com.bea.wli.worklist.beans.session.RemoteWorklistManagerBean.removeTaskListeners(RemoteWorklistManagerBean.java:3001)
at
com.bea.wli.worklist.beans.session.RemoteWorklistManagerBean_us8t1c_EOImpl.removeTaskListeners(RemoteWorklistManagerBean_us8t
1c_EOImpl.java:698)
at com.bea.wli.worklist.timer.WorklistTimerMDB.processListenerToRemove(WorklistTimerMDB.java:102)
at com.bea.wli.worklist.timer.WorklistTimerMDB.onMessage(WorklistTimerMDB.java:61)
at weblogic.ejb20.internal.MDListener.execute(MDListener.java:382)
at weblogic.ejb20.internal.MDListener.transactionalOnMessage(MDListener.java:316)
at weblogic.ejb20.internal.MDListener.onMessage(MDListener.java:281)
at weblogic.jms.client.JMSSession.onMessage(JMSSession.java:2596)
at weblogic.jms.client.JMSSession.execute(JMSSession.java:2516)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:197)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:170)
>
####<May 8, 2005 3:08:26 PM CST> <Info> <EJB> <app01> <jcwliserver> <ExecuteThread: '96' for queue:
'weblogic.kernel.Default'> <<anonymous>> <BEA1-54B96B551CC1A8856F80> <BEA-010049> <EJB Exception in method: remove:
javax.ejb.NoSuchEntityException: [EJB:010140]Bean with primary key: '153.22.52.28-17343c7.10243c3c6ec.a51' not found..
javax.ejb.NoSuchEntityException: [EJB:010140]Bean with primary key: '153.22.52.28-17343c7.10243c3c6ec.a51' not found.
at
com.bea.wli.worklist.beans.entity.ListenerBean_1nsp14__WebLogic_CMP_RDBMS.__WL_loadGroup0(ListenerBean_1nsp14__WebLogic_CMP_R
DBMS.java:1165)
at
com.bea.wli.worklist.beans.entity.ListenerBean_1nsp14__WebLogic_CMP_RDBMS.__WL_setTaskBean_listeners(ListenerBean_1nsp14__Web
Logic_CMP_RDBMS.java:596)
at
com.bea.wli.worklist.beans.entity.ListenerBean_1nsp14__WebLogic_CMP_RDBMS.__WL_setTaskBean_listeners(ListenerBean_1nsp14__Web
Logic_CMP_RDBMS.java:584)
at
com.bea.wli.worklist.beans.entity.ListenerBean_1nsp14__WebLogic_CMP_RDBMS.ejbRemove(ListenerBean_1nsp14__WebLogic_CMP_RDBMS.j
ava:2423)
at weblogic.ejb20.manager.DBManager.remove(DBManager.java:1318)
at weblogic.ejb20.internal.EntityEJBLocalHome.remove(EntityEJBLocalHome.java:214)
at
com.bea.wli.worklist.beans.entity.ListenerBean_1nsp14_LocalHomeImpl.remove(ListenerBean_1nsp14_LocalHomeImpl.java:131)
at
com.bea.wli.worklist.beans.session.RemoteWorklistManagerBean.removeTaskListeners(RemoteWorklistManagerBean.java:3001)
at
com.bea.wli.worklist.beans.session.RemoteWorklistManagerBean_us8t1c_EOImpl.removeTaskListeners(RemoteWorklistManagerBean_us8t
1c_EOImpl.java:698)
at com.bea.wli.worklist.timer.WorklistTimerMDB.processListenerToRemove(WorklistTimerMDB.java:102)
at com.bea.wli.worklist.timer.WorklistTimerMDB.onMessage(WorklistTimerMDB.java:61)
at weblogic.ejb20.internal.MDListener.execute(MDListener.java:382)
at weblogic.ejb20.internal.MDListener.transactionalOnMessage(MDListener.java:316)
at weblogic.ejb20.internal.MDListener.onMessage(MDListener.java:281)
at weblogic.jms.client.JMSSession.onMessage(JMSSession.java:2596)
at weblogic.jms.client.JMSSession.execute(JMSSession.java:2516)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:197)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:170)
>
The wli server generated log file very quickly ,:it can output 1M bytes log file per second,all logged information
is similar to the <BEA-010049> excetpion metioned above. BEA support engineer suggested me to totally stop the
archive ,I did so,but the server was still ouput the log file like crazy as before and the normal log information are
completely override by <BEA-010049> excetpion.
I checked the EntityEJBs in WLI console :Mywlidomain> Applications> WLI System EJBs> WLI Worklist Persistence$)A#,and
found that in statistics table :
ListenerBean : Pool miss ratio = 99.67%, transaction rollback ration = 99.90%,Destory Bean Ratio = 99.48%(see
attachment)
WorklistTimerMDB: transaction rollback ratio = 99.97%
It seems ListenerBean worked incorrectly.I searched in support.bea.com and found one example which also about server
output endless log file,the author solved this problem by changing Bean's transaction-attribute from 'Required'
to 'RequiresNew' thought he didn't know why it works. I try this method by changing ListenerBean's
transaction-attribute from 'Required' to 'RequiresNew'.
$weblogic_home/integration/lib/wli-ejbs.ear/ejb-jar-generic.xml:
<ejb-name>CommentBean</ejb-name>
<method-name>*</method-name>
</method>
<trans-attribute>Required</trans-attribute>
</container-transaction>
<container-transaction>
<method>
<ejb-name>ListenerBean</ejb-name>
<method-name>*</method-name>
</method>
<trans-attribute>RequiresNew</trans-attribute> -----------the default value is Required,I modified it to
RequiresNew.
</container-transaction>
<container-transaction>
really it works, the log file output resume normal. But there are still some problems:
(1) this exception is still exist:
javax.ejb.NoSuchEntityException: [EJB:010140]Bean with primary key: '153.22.52.28-17343c7.10243c3c6ec.a51' not found.
(2) is this method safe ?(Does "Modify ListenBean's transaction-attribute" impat other parts of wli system?)
(3) after changed the transaction attribute, if turn on archive again, the server output endless exception:
####<Jun 1, 2005 5:14:58 PM CST> <Info> <EJB> <app01> <jcwliserver> <ExecuteThread: '63' for queue:
'weblogic.kernel.Default'> <<anonymous>> <BEA1-2F43890B86B0A8856F80> <BEA-010036> <Exception from ejbStore:
java.sql.SQLException: XA error: XAER_RMERR : A resource manager error has occured in the transaction branch start()
failed on resource 'weblogic.jdbc.jta.DataSource': XAER_RMERR : A resource manager error has occured in the transaction
branch
oracle.jdbc.xa.OracleXAException
at oracle.jdbc.xa.OracleXAResource.checkError(OracleXAResource.java:1160)
at oracle.jdbc.xa.client.OracleXAResource.start(OracleXAResource.java:311)
at weblogic.jdbc.wrapper.VendorXAResource.start(VendorXAResource.java:50)
at weblogic.jdbc.jta.DataSource.start(DataSource.java:617)
at weblogic.transaction.internal.XAServerResourceInfo.start(XAServerResourceInfo.java:1075)
at weblogic.transaction.internal.XAServerResourceInfo.xaStart(XAServerResourceInfo.java:1007)
at weblogic.transaction.internal.XAServerResourceInfo.enlist(XAServerResourceInfo.java:218)
at weblogic.transaction.internal.ServerTransactionImpl.enlistResource(ServerTransactionImpl.java:419)
at weblogic.jdbc.jta.DataSource.enlist(DataSource.java:1287)
at weblogic.jdbc.jta.DataSource.refreshXAConnAndEnlist(DataSource.java:1250)
at weblogic.jdbc.jta.DataSource.getConnection(DataSource.java:385)
at weblogic.jdbc.jta.DataSource.connect(DataSource.java:343)
at weblogic.jdbc.common.internal.RmiDataSource.getConnection(RmiDataSource.java:305)
at weblogic.ejb20.cmp.rdbms.RDBMSPersistenceManager.getConnection(RDBMSPersistenceManager.java:2247)
at
com.bea.wli.worklist.beans.entity.TaskBean_9fxazu__WebLogic_CMP_RDBMS.__WL_store(TaskBean_9fxazu__WebLogic_CMP_RDBMS.java:363
6)
at
com.bea.wli.worklist.beans.entity.TaskBean_9fxazu__WebLogic_CMP_RDBMS.ejbStore(TaskBean_9fxazu__WebLogic_CMP_RDBMS.java:3548)
at weblogic.ejb20.manager.DBManager.beforeCompletion(DBManager.java:927)
at weblogic.ejb20.internal.TxManager$TxListener.beforeCompletion(TxManager.java:745)
at weblogic.transaction.internal.ServerSCInfo.callBeforeCompletions(ServerSCInfo.java:1010)
at weblogic.transaction.internal.ServerSCInfo.startPrePrepareAndChain(ServerSCInfo.java:115)
at weblogic.transaction.internal.ServerTransactionImpl.localPrePrepareAndChain(ServerTransactionImpl.java:1142)
at weblogic.transaction.internal.ServerTransactionImpl.globalPrePrepare(ServerTransactionImpl.java:1868)
at weblogic.transaction.internal.ServerTransactionImpl.internalCommit(ServerTransactionImpl.java:250)
at weblogic.transaction.internal.ServerTransactionImpl.commit(ServerTransactionImpl.java:221)
at weblogic.ejb20.internal.MDListener.execute(MDListener.java:412)
at weblogic.ejb20.internal.MDListener.transactionalOnMessage(MDListener.java:316)
at weblogic.ejb20.internal.MDListener.onMessage(MDListener.java:281)
at weblogic.jms.client.JMSSession.onMessage(JMSSession.java:2596)
at weblogic.jms.client.JMSSession.execute(JMSSession.java:2516)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:197)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:170)
java.sql.SQLException: XA error: XAER_RMERR : A resource manager error has occured in the transaction branch start()
failed on resource 'weblogic.jdbc.jta.DataSource': XAER_RMERR : A resource manager error has occured in the transaction
branch
oracle.jdbc.xa.OracleXAException
at oracle.jdbc.xa.OracleXAResource.checkError(OracleXAResource.java:1160)
at oracle.jdbc.xa.client.OracleXAResource.start(OracleXAResource.java:311)
at weblogic.jdbc.wrapper.VendorXAResource.start(VendorXAResource.java:50)
at weblogic.jdbc.jta.DataSource.start(DataSource.java:617)
at weblogic.transaction.internal.XAServerResourceInfo.start(XAServerResourceInfo.java:1075)
at weblogic.transaction.internal.XAServerResourceInfo.xaStart(XAServerResourceInfo.java:1007)
at weblogic.transaction.internal.XAServerResourceInfo.enlist(XAServerResourceInfo.java:218)
at weblogic.transaction.internal.ServerTransactionImpl.enlistResource(ServerTransactionImpl.java:419)
at weblogic.jdbc.jta.DataSource.enlist(DataSource.java:1287)
at weblogic.jdbc.jta.DataSource.refreshXAConnAndEnlist(DataSource.java:1250)
at weblogic.jdbc.jta.DataSource.getConnection(DataSource.java:385)
at weblogic.jdbc.jta.DataSource.connect(DataSource.java:343)
at weblogic.jdbc.common.internal.RmiDataSource.getConnection(RmiDataSource.java:305)
at weblogic.ejb20.cmp.rdbms.RDBMSPersistenceManager.getConnection(RDBMSPersistenceManager.java:2247)
at
com.bea.wli.worklist.beans.entity.TaskBean_9fxazu__WebLogic_CMP_RDBMS.__WL_store(TaskBean_9fxazu__WebLogic_CMP_RDBMS.java:363
6)
at
com.bea.wli.worklist.beans.entity.TaskBean_9fxazu__WebLogic_CMP_RDBMS.ejbStore(TaskBean_9fxazu__WebLogic_CMP_RDBMS.java:3548)
at weblogic.ejb20.manager.DBManager.beforeCompletion(DBManager.java:927)
at weblogic.ejb20.internal.TxManager$TxListener.beforeCompletion(TxManager.java:745)
at weblogic.transaction.internal.ServerSCInfo.callBeforeCompletions(ServerSCInfo.java:1010)
at weblogic.transaction.internal.ServerSCInfo.startPrePrepareAndChain(ServerSCInfo.java:115)
at weblogic.transaction.internal.ServerTransactionImpl.localPrePrepareAndChain(ServerTransactionImpl.java:1142)
at weblogic.transaction.internal.ServerTransactionImpl.globalPrePrepare(ServerTransactionImpl.java:1868)
at weblogic.transaction.internal.ServerTransactionImpl.internalCommit(ServerTransactionImpl.java:250)
at weblogic.transaction.internal.ServerTransactionImpl.commit(ServerTransactionImpl.java:221)
at weblogic.ejb20.internal.MDListener.execute(MDListener.java:412)
at weblogic.ejb20.internal.MDListener.transactionalOnMessage(MDListener.java:316)
at weblogic.ejb20.internal.MDListener.onMessage(MDListener.java:281)
at weblogic.jms.client.JMSSession.onMessage(JMSSession.java:2596)
at weblogic.jms.client.JMSSession.execute(JMSSession.java:2516)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:197)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:170)
at weblogic.jdbc.jta.DataSource.enlist(DataSource.java:1292)
at weblogic.jdbc.jta.DataSource.refreshXAConnAndEnlist(DataSource.java:1250)
at weblogic.jdbc.jta.DataSource.getConnection(DataSource.java:385)
at weblogic.jdbc.jta.DataSource.connect(DataSource.java:343)
at weblogic.jdbc.common.internal.RmiDataSource.getConnection(RmiDataSource.java:305)
at weblogic.ejb20.cmp.rdbms.RDBMSPersistenceManager.getConnection(RDBMSPersistenceManager.java:2247)
at
com.bea.wli.worklist.beans.entity.TaskBean_9fxazu__WebLogic_CMP_RDBMS.__WL_store(TaskBean_9fxazu__WebLogic_CMP_RDBMS.java:363
6)
at
com.bea.wli.worklist.beans.entity.TaskBean_9fxazu__WebLogic_CMP_RDBMS.ejbStore(TaskBean_9fxazu__WebLogic_CMP_RDBMS.java:3548)
at weblogic.ejb20.manager.DBManager.beforeCompletion(DBManager.java:927)
at weblogic.ejb20.internal.TxManager$TxListener.beforeCompletion(TxManager.java:745)
at weblogic.transaction.internal.ServerSCInfo.callBeforeCompletions(ServerSCInfo.java:1010)
at weblogic.transaction.internal.ServerSCInfo.startPrePrepareAndChain(ServerSCInfo.java:115)
at weblogic.transaction.internal.ServerTransactionImpl.localPrePrepareAndChain(ServerTransactionImpl.java:1142)
at weblogic.transaction.internal.ServerTransactionImpl.globalPrePrepare(ServerTransactionImpl.java:1868)
at weblogic.transaction.internal.ServerTransactionImpl.internalCommit(ServerTransactionImpl.java:250)
at weblogic.transaction.internal.ServerTransactionImpl.commit(ServerTransactionImpl.java:221)
at weblogic.ejb20.internal.MDListener.execute(MDListener.java:412)
at weblogic.ejb20.internal.MDListener.transactionalOnMessage(MDListener.java:316)
at weblogic.ejb20.internal.MDListener.onMessage(MDListener.java:281)
at weblogic.jms.client.JMSSession.onMessage(JMSSession.java:2596)
at weblogic.jms.client.JMSSession.execute(JMSSession.java:2516)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:197)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:170)
>
How can I solve these problem ? any suggestion is warm welcome.
Thanks in advance.
Great LouBack up all data to at least two different storage devices, if you haven't already done so. The backups can be made with Time Machine or with a mirroring tool such as Carbon Copy Cloner. Preferably both.
Boot into Recovery (command-R at startup), launch Disk Utility, and erase the startup volume with the default options.This operation will destroy all data on the volume, so you had be better be sure of your backups. Quit Disk Utility and install OS X. When you reboot, you'll be prompted to go through the initial setup process. That’s when you transfer the data from one of your backups. For details of how this works, see here:
Using Setup Assistant
Transfer only "Users" and "Settings" – not "Applications" or "Other files." Don't transfer the Guest account, if it was enabled on the old system. Test. If the problem is still there, you have a hardware fault. Take the machine to an Apple Store for diagnosis.
If the problem is resolved, reinstall your third-party software cautiously. Self-contained applications that install into the Applications folder by drag-and-drop or download from the App Store are safe. Anything that comes packaged as an installer or that prompts for an administrator password is suspect, and you must test thoroughly after reinstalling each such item to make sure you haven't restored the problem.
Note: You need an always-on Ethernet or Wi-Fi connection to the Internet to use Recovery. It won’t work with USB or PPPoE modems, or with proxy servers, or with networks that require a certificate for authentication. -
Need user exit when deleting an invoice using MIR6 transaction
Hi all,
I m trying to delete an Invoice using MIR6 transaction. And I need a user exit to be triggered on deletion of an Invoice.
Can anybody help me and let me know if any user exit is available there?
Points will be rewarded.
thanks
AshishHi
Business Add-Ins
Business Add-Ins are a new SAP enhancement technique based on ABAP Objects. They can be inserted into the SAP System to accommodate user requirements too specific to be included in the standard delivery. Since specific industries often require special functions, SAP allows you to predefine these points in your software.
As with customer exits (SMOD/CMOD [Page 40]), two different views are available:
In the definition view, an application programmer predefines exit points in a source that allow specific industry sectors, partners, and customers to attach additional software to standard SAP source code without having to modify the original object.
In the implementation view, the users of Business Add-Ins can customize the logic they need or use a standard logic if one is available.
In contrast to customer exits, Business Add-Ins no longer assume a two-system infrastructure (SAP and customers), but instead allow for multiple levels of software development (by SAP, partners, and customers, and as country versions, industry solutions, and the like). Definitions and implementations of Business Add-Ins can be created at each level within such a system infrastructure.
SAP guarantees the upward compatibility of all Business Add-In interfaces. Release upgrades do not affect enhancement calls from within the standard software nor do they affect the validity of call interfaces. You do not have to register Business Add-Ins in SSCR.
The Business Add-In enhancement technique differentiates between enhancements that can only be implemented once and enhancements that can be used actively by any number of customers at the same time.
In addition, Business Add-Ins can be defined according to filter values. This allows you to control add-in implementation and make it dependent on specific criteria (on a specific Country value, for example). All ABAP sources, screens, GUIs, and table interfaces created using this enhancement technique are defined in a manner that allows customers to include their own enhancements in the standard.
A single Business Add-In contains all of the interfaces necessary to implement a specific task. In Release 4.6A, program and menu enhancements can be made with Business Add-Ins. The actual program code is enhanced using ABAP Objects. In order to better understand the programming techniques behind the Business Add-In enhancement concept, SAP recommends reading the section on ABAP Objects
DEFINING THE BADI
1) execute Tcode SE18.
2) Specify a definition Name : ZBADI_SPFLI
3) Press create
4) Choose the attribute tab. Specify short desc for badi.. and specify the type :
multiple use.
5) Choose the interface tab
6) Specify interface name: ZIF_EX_BADI_SPFLI and save.
7) Dbl clk on interface name to start class builder . specify a method name (name,
level, desc).
Method level desc
Linese;ection instance methos some desc
8) place the cursor on the method name desc its parameters to define the interface.
Parameter type refe field desc
I_carrid import spfli-carrid some
I_connid import spefi-connid some
9) save , check and activate adapter class proposed by system is
ZCL_IM_IM_LINESEL is genereated.
IMPLEMENTATION OF BADI DEFINITION
1) EXECUTE tcode se18.choose menuitem create from the implementation menubar.
2) Specify aname for implementation ZIM_LINESEL
3) Specify short desc.
4) Choose interface tab. System proposes a name fo the implementation class.
ZCL_IM_IMLINESEL which is already generarted.
5) Specify short desc for method
6) Dbl clk on method to insert code..(check the code in AAA).
7) Save , check and activate the code.
Some useful URL
http://www.esnips.com/doc/e06e4171-29df-462f-b857-54fac19a9d8e/ppt-on-badis.ppt
http://www.esnips.com/doc/10016c34-55a7-4b13-8f5f-bf720422d265/BADIs.pdf
http://www.esnips.com/doc/43a58f51-5d92-4213-913a-de05e9faac0d/Business-Addin.doc
http://www.esnips.com/doc/1e10392e-64d8-4181-b2a5-5f04d8f87839/badi.doc
www.sapgenie.com/publications/saptips/022006%20-%20Zaidi%20BADI.pdf
http://www.sapdevelopment.co.uk/enhance/enhance_badi.htm
http://help.sap.com/saphelp_nw04/helpdata/en/04/f3683c05ea4464e10000000a114084/content.htm
http://help.sap.com/saphelp_nw04/helpdata/en/e6/d54d3c596f0b26e10000000a11402f/content.htm
http://help.sap.com/saphelp_nw2004s/helpdata/en/c2/eab541c5b63031e10000000a155106/frameset.htm
Now write a sample program to use this badi method..
Look for BBB sample program.
AAA
data : wa_flights type sflight,
it_flights type table of sflight.
format color col_heading.
write:/ 'Flight info of:', i_carrid, i_connid.
format color col_normal.
select * from sflight
into corresponding fields of table it_flights
where carrid = i_carrid
and connid = i_connid.
loop at it_flights into wa_flights.
write:/ wa_flights-fldate,
wa_flights-planetype,
wa_flights-price currency wa_flights-currency,
wa_flights-seatsmax,
wa_flights-seatsocc.
endloop.
BBB
*& Report ZBADI_TEST *
REPORT ZBADI_TEST .
tables: spfli.
data: wa_spfli type spfli,
it_spfli type table of spfli with key carrid connid.
*Initialise the object of the interface.
data: exit_ref type ref to ZCL_IM_IM_LINESEL,
exit_ref1 type ref to ZIF_EX_BADISPFLI1.
selection-screen begin of block b1.
select-options: s_carr for spfli-carrid.
selection-screen end of block b1.
start-of-selection.
select * from spfli into corresponding fields of table it_spfli
where carrid in s_carr.
end-of-selection.
loop at it_spfli into wa_spfli.
write:/ wa_spfli-carrid,
wa_spfli-connid,
wa_spfli-cityfrom,
wa_spfli-deptime,
wa_spfli-arrtime.
hide: wa_spfli-carrid, wa_spfli-connid.
endloop.
at line-selection.
check not wa_spfli-carrid is initial.
create object exit_ref.
exit_ref1 = exit_ref.
call method exit_ref1->lineselection
EXPORTING
i_carrid = wa_spfli-carrid
i_connid = wa_spfli-connid.
clear wa_spfli.
check the following user exits for MIR6
LMR1M001 User exits in Logistics Invoice Verification
LMR1M002 Account grouping for GR/IR account maintenance
LMR1M003 Number assignment in Logistics Invoice Verification
LMR1M004 Logistics Invoice Verification: item text for follow-on docs
LMR1M005 Logistics Inv. Verification: Release Parked Doc. for Posting
LMR1M006 Logistics Invoice Verification: Process XML Invoice
MRMH0001 Logistics Invoice Verification: ERS procedure
MRMH0002 Logistics Invoice Verification: EDI inbound
MRMH0003 Logistics Invoice Verification: Revaluation/RAP
MRMN0001 Message output and creation: Logistics Invoice Verification
Regards
Anji
Message was edited by:
Anji Reddy Vangala -
Practical use of a transient VO
hi i am new to ADF and i am slightly confused about the use of the transient view object. i am clear on an updatable VO which is used to update and read only VO whose practical use would be for LOVs and also showing read only data on the UI, . Can some one help me understand the practical use of transient VO and also the VO based on a query. Thanks in advance. I know this is a basic question but i am not getting the practical usage of it.
Hi,
If you can give some practical approaches where the transient VOs are required that would help me understand the actual concept of transient VO.
well answer is here. https://blogs.oracle.com/vijaymohan/entry/transient_vo_powerful_j2ee_design_pattern
go through the second point.
I am pretty aware that the transient VO doesn't refer to a table/EO/DB and the attributes are created while creating the VO.
yeah you 're right.
The same VO can be dragged as a form suppose.. but what after that ... what help does it do to a developer in achieving a logic ?
Consider this simple scenario currently fusion web app team don't have a db.so no db fetches for their application. just they use transient vo for grab the details from the end user and manipulate some sort of data show to end user these values live until session lives.
At one point they will send the data via web services.
concern service communicate with some other team and perform insertion and update ion and deletion of data in db.
so here no need to do use entity derived vo. I can't explain much here about whole thing.
Thanks. -
JBDC transaction attribute problem.
Hi All,
We have some methods which will make a call to database to bring some data
using SELECT statement. Have set transaction attribute for those methods as NOT SUPPORTED not to open a transaction and lock the table. But, now it is opening a transaction & locking table & rows.
Any idea why it is doing so ?normally a select statement will not lock the table
unless you are using a PreparedStatement or
CallableStatement class to perform the query. I don't believe this is correct. I don't think either PreparedStatement or CallableStatement automatically lock tables.
If you
are then it should be an expected behavior. if you
are not using any of this classes make sure to check
that you have not lock the table with the statement
connection.setAutoCommit(false);
this
statement usually locks the table whether you are
using a select statement or not. I don't think this is true, either. This tells the Connection where a transaction starts.
But if these are not
the cause then make sure that you close all
connections when the query has finished executing.
that is connection.close();I think the correct way to tell the database manager to lock data is to use "SELECT FOR UPDATE" notation.
% -
Hi,
I have a stateless session bean with Container Managed Transaction (CMT) performs DB2 database operation using DAO pattern.The DAO calls DB2 stored procedure.
Commit statements have been used in the stored procedure.No rollback statements have been used in stored procedure.
My question is what would be the appropriate transaction attribute to set for the bean methods?
Is it Supports or Required? I read in IBM site that Supports must be used with caution.
Thanks in advanced.Tom, you say that "any particular subscription will support only a single consumer" - I don't quite understand how this fits with the max-beans-in-pool setting for an MDB. Are you saying that for CMT MDBs, there is only ever 1 active bean in the pool regardless of what I set max-beans-in-pool to be?Yes, and only one pool at a time will be able to access the subscription. A durable subscription can only be accessed by a connection with a client-id that matches the subscription's client-id, and a DurableSubscriber consumer created from said sonnection that has the same subscriber name. MDBs use a vanilla javax.jms.TopicSubscriber to consume from topic subscriptions, and are designed to assume that the JMS provider adheres to the JMS specification for this API. The JMS specification states (1) only one connection should be able to use a pariticular connection client-id (optional - depends on vendor), and (2) that a subscription must only support a single javax.jms.Consumer (not optional).
Also, does this restriction apply to CMT MDBs regardless of their transaction attribute ie. even if I set transaction-attribute NOT_SUPPORTED?The documentation recommends restricting non-TX MDBs that consume from foreign topics so that they are single threaded. In not-supported tx mode, with foreign vendors, a single connection and single subscriber is still created for a particular pool, as per above, but multiple threads are created to process the single subscriber's messages in parallel. This mode is not safe in that it is possible to lose messages in the event of a crash or application-forced redeliveries (the message may not be redelivered). The problem doesn't apply to MDBs that consume from WebLogic Topics.
Hope this helps,
Tom -
Issue with Transaction Attribute
Hi All
I am trying to build a program that will interact with two database at the same time.Lets say, I am getting/updating/inserting data from/to Database1.table1 so I am creating transaction attribute for the same to commit and roll back the changes.
Now, after the above scenario I need to update my audit trail table in database2 but since I have already created transaction for the above database it not allowing me to connect to database2 saying "Connection already exit for database1 cannot create new transaction for Database2".
Also if I tried to create a new transaction for Database2 its passing me exception saying "A transaction is already running for the thread cannot create new transaction for the same thread".
I tried calling a new thread also but the exception remains as the new thread is called from the main thread.
Please help me in same so that i can create two transaction or connection to two database using same transaction.user12882304 wrote:
... connection to two database using same transaction.Not possible.
You are attempting something with a JDBC driver that the driver does not support.
Your first step is to research distributed transactions.
For this to actually work the database itself must support it. And you must use the correct idiom to invoke it. -
We are using Ejbs2.1
Our system uses Database but we are not writing IT System so we do not need To use trasactions at all.
We are using RequiresNew as the Transaction Attribute so every
ejb starts in a new transaction and each method only invoke one database access
We are now considering to change the Transaction Attribute to NotSupported So each database access will do a commit (the database connection is set to autoCommit)
We thought that this approach will be more efficient since no transaction will be created.
I will be happy to hear what you think about this approach, is our assumption is correct?it means that the method must operate outside of an active transaction - in other words there will be no active transaction during its runtime. If there is an active transaction when the method is called, that transaction is "put on hold" until the "notsupported" EJB call finishes.
-
Default Transaction Attribute for EJBs
Guys,
Can you tell me the default transaction attributes if any in Weblogic 7.0 i.e.
the attributes used
if not explicitly specified for a bean method when using in CMT ?
For CMP entity beans,
MDBs,
Other beans (?) :
thanks for your help
regards
VedHello Mr. Woollen,
As always, thank you for your excellent insight into the internals of BEA WebLogic.
I now have a better understanding of what happens "by default" in WLS. I do agree
that changing this now would definitely break existing applications. It's always
difficult to decide when to officially deprecate a "feature" or to leave it in
forever.
Best regards,
Ryan LeCompte
[email protected]
http://www.louisiana.edu/~rml7669
Rob Woollen <[email protected]> wrote:
For better or worse, MDBs default to NotSupported and everything else
defaults to Supports.
I say for better or worse because I would have liked to change it to
always require the user to set a default transaction attribute.
Unfortunately we have many customer's applications who depend on this
behavior, and I believe if we change it we will break all of them.
Regardless, I would not recommend depending on our default tx attribute
and instead always set one for '*'.
In general, entity beans should run as Required or Mandatory. Session
beans are usually required or notsupported. MDBs are required or
notsupported.
-- Rob
Ved Gangaputra wrote:
Guys,
Can you tell me the default transaction attributes if any in Weblogic7.0 i.e.
the attributes used
if not explicitly specified for a bean method when using in CMT ?
For CMP entity beans,
MDBs,
Other beans (?) :
thanks for your help
regards
Ved
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