Hi:
Camel 's transaction-policy is applied for all processors in the
route; but how to use this features to implement a customized transaction
section in camel? Etc: if I could assign a transaction-policy to a single
pipe-line processor(not the whole route), I could define custom transaction
section easily;
To illustrate this usage I give a sample , and I want to know is there
a-better solution to use camel;
For example: A application which read message from jms and, save the message
to 2 different database table(A, B). This application asks for this
transaction features:
Two database table must keep in a same transaction: one failed another
rollback;
Jms must take part in seperate transaction, that's to say if both database
success, the jms will commit; if one database failed, I will log the jms
message in a storage, and jms will commit; But if logging failed, the jms
will rollback;
And how to full-fill this transaction features using camel?
Must I separate the complete route into different route piece just for
transaction support?
Could camel support the define a transaction range (but not a
transaction-policy)?
Even I separate the complete route into different route just for transaction
support, it still has a difficult: how to declared a new transaction for a
processing route( in this sample , I need to declare a new transaction for
table-A and table-B processors); if I declared a required-new-transaction
policy, all the processor in route act in a separate transaction; and it
cannot full-fill such demand: table A and table B act in a transaction;
To resolve this problem , I must introduce another route just act as a
bridge for the new-tx-range);following is a solution use camel's current
transaction policy to this example, but it's hard to understand:
routeA: (jms)
(from-jms)-->(required-tx-policy)-->doTry-->(to
direct:new-tx-op)-->(docatch)-->(log);
routeB:(this is the hardest part for usage)
(from direct:new-tx-op)-->new-tx -policy-->(to direct:db-op)
Route C:
(from direct:db-op)-->(required-tx-policy)-->(table A save)-->(table B save)
So does camel support a feature to define transaction range? So the route
will looks like
(from jms)-->pipeline(required-tx) -->[dotry-->pipeline(new-tx)-->[(table
A)-->(table B)]-->docatch-->log];
If camel could assign a transaction-policy to single pipe-line process ,
this feature could be achieved easily;
