Insert via Entity bean and Insert via SQL Insert
I am inserting a record in Table A using Entity beans create method and then into Table B using SQL Insert Statement. The Table B has a foreign key relationship with Table A. Will there be an issue with transaction failing etc.. There is already a session bean method calling this entity bean and the SQL insert. The session bean method's transactional attribute has been set as "Required". I found that in some cases the session bean method gets executed perfectly but does not insert any data in the table. I am not sure if the issue is because of the above statement. Correct me if I am wrong, if the container creates and Entity bean object, but the data base insert has not yet taken place i.e. on calling the create method on the remote interface the Object is created but ejbCreate is not yet called, may be because ejbCreate is called at some later time thread in the then the second insert is executed using the SQL Insert, then the becaue of the FK constraint on the database this entire transaction fails and rolls back. I want to know weather this is a possiblity, i.e can containers implement it like this. Issue: This is another issue related to the previous one. I call a create method on the Remote interface of the entity bean A. There is a after insert trigger on the Table A which updates some values of the record create with the entity bean. In some cases I find that the values are not getting updated by trigger. Possible Reason:- This could be because the entity bean cache contains some values of Object A, which is inserted in the database, but the container has no way of knowing if the values are getting updated using the trigger, later in the life cycle of the entity bean if the container updates the record with the values in its cache(may be by calling ejbStore method) then the values updated by the trigger are lost. I am having this issue and the issue in the previous one only in the production environment and not in the development ennvironment, I cannot replicate this issue other wise because in the production environment the are multiple objects that are to be cached and pooled.
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Vikranth
10/1/2003 1:22:18 PM
sybase.easerver.j2ee
2067 articles. 
0 followers.
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> I am inserting a record in Table A using Entity beans > create method and then into Table B using SQL Insert > Statement. The Table B has a foreign key relationship with > Table A. Will there be an issue with transaction failing > etc.. > Sounds like you are using BMP. Correct. If the create occurss, then the 2nd insert should be fine > > There is already a session bean method calling this entity > bean and the SQL insert. The session bean method's > transactional attribute has been set as "Required". I > found that in some cases the session bean method gets > executed perfectly but does not insert any data in the > table. If Tx has completed, then you should be able to see the update in the db. > I am not sure if the issue is because of the above > statement. Correct me if I am wrong, if the container > creates and Entity bean object, but the data base insert > has not yet taken place i.e. on calling the create method > on the remote interface the Object is created but > ejbCreate is not yet called, may be because ejbCreate is > called at some later time thread in the then the second > insert is executed using the SQL Insert, then the becaue > of the FK constraint on the database this entire > transaction fails and rolls back. If you return from the create() call, you should assume that the row has been added to the db. > I want to know weather this is a possiblity, i.e can > containers implement it like this. > > Issue: > This is another issue related to the previous one. > I call a create method on the Remote interface of the > entity bean A. create() is on the home interface There is a after insert trigger on the > Table A which updates some values of the record create > with the entity bean. > In some cases I find that the values are not getting > updated by trigger. > The trigger is a db activity so the trigger should fire unless the insert did not meet the criteria of the trigger. > Possible Reason:- > This could be because the entity bean cache contains some > values of Object A, which is inserted in the database, but > the container has no way of knowing if the values are > getting updated using the trigger, later in the life cycle > of the entity bean if the container updates the record > with the values in its cache(may be by calling ejbStore > method) then the values updated by the trigger are lost. > > I am having this issue and the issue in the previous one > only in the production environment and not in the > development ennvironment, I cannot replicate this issue > other wise because in the production environment the are > multiple objects that are to be cached and pooled.
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lance
11/3/2003 6:32:04 PM
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