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SOA and distributed transactions


SOA and distributed transactions

By : b_eric
Date : November 19 2020, 07:01 PM
around this issue Distributed transactions are used very often in SOA environments. If you've a composite service calling multiple services, the underlying service calls should be handled as a single transaction. Business processes should allow for a roll-back of their steps. If the underlying resources allow for it, you can use 2-phase commits, but in many cases it is impossible. In these cases compensating actions should be done on the services/resources invoked before the failed step. In other words, undo the succeeded steps in a reverse order.
Imaginary example: telecom company provisions a new VoIP product for a customer with 6 service calls:
code :


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XA distributed transactions in C++

XA distributed transactions in C++


By : Zafer Boz
Date : March 29 2020, 07:55 AM
it fixes the issue I am not aware of an open-source or free transaction monitor that has any degree of maturity, although This link does have some fan-out. The incumbent commercial ones are BEA's Tuxedo, Tibco's Enterprise Message Service (really a transactional message queue manager like IBM's MQ) and Transarc's Encina (now owned by IBM). These systems are all very expensive.
If you want to make your own (and incidentally make a bit of a name for yourself by filling a void in the open-source software space) get a copy of Grey and Reuter. This is the definitive work on transaction processing systems architecture, written by two of the foremost experts in the field.
Distributed transactions with WCF

Distributed transactions with WCF


By : Ivan
Date : March 29 2020, 07:55 AM
I wish did fix the issue. Not sure you've given us enough to go on, but if I'm reading correctly you're attempting to make sure you can support a transaction through your WCF service? While your DB doesn't support transactions, and your WCF endpoints sit behind a load balancer? Do I have this correct? If so....
Since your DB doesn't have transactional support, that moves to your WCF tier. This suggests a coarse level of granularity in your methods such that you can ensure a single call to your WCF service encompasses your transaction sufficiently. Don't spread a transaction across multiple WCF calls, you're asking for trouble.
Distributed transactions in a Asp.net application

Distributed transactions in a Asp.net application


By : user2774150
Date : March 29 2020, 07:55 AM
it should still fix some issue Use a TransactionScope object and different connections (one for each database). The transaction will escalate to a distributed one automatically.
From the example on the MSDN page:
code :
    using (TransactionScope scope = new TransactionScope())
    {
        using (SqlConnection connection1 = new SqlConnection(connectString1))
        {
            // Opening the connection automatically enlists it in the 
            // TransactionScope as a lightweight transaction.
            connection1.Open();

            using (SqlConnection connection2 = new SqlConnection(connectString2))
            {
                // The transaction is escalated to a full distributed
                // transaction when connection2 is opened.
                connection2.Open();
            }
        }

        scope.Complete();
    }
Distributed transactions before ADO.NET 2.0

Distributed transactions before ADO.NET 2.0


By : Swati
Date : March 29 2020, 07:55 AM
I wish this helpful for you You would use the EnterpriseServices classes which interact with COM+.
COM+ Integration: How .NET Enterprise Services Can Help You Build Distributed Applications
Distributed store with transactions

Distributed store with transactions


By : AnonymousSurfer
Date : March 29 2020, 07:55 AM
hop of those help? There are plans to support entity groups in cassandra in the future, see CASSANDRA-1684.
If your data can't be easily modelled without transactions, is it worth using a non transcational database? Do you need the scalability?
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