WebSphere Enterprise Service Bus for z/OS, Version 6.2.0 Operating Systems: z/OS


Asynchronous callback with synchronous implementation

ARM statistics available when callback requests and callback executions use different threads on a synchronous implementation.

Parameters

Event monitoring for SCA components includes the event points that are shown in black Black event point, while the event points shown in blue Blue event point are used only to calculate and fire PMI/ARM statistics.

In the table and diagram below, the "current" ARM transaction (denoted as X1) is created when the calling service component was invoked for the first time. If the caller is not a service component, the current arm transaction will be used, or a new one will be created. If it is not the starting transaction it will have a parent. This is represented in the following table and diagram with the notation Xn.Xn+1. These are used to show the transaction lineage. Every SCA invocation starts a new transaction, which is parented by the current transaction of the caller. You can create new transactions and you can access the current transaction, but this will not modify the SCA transaction lineage.

Table 1. Invocation of request and return result
Type Statistics Formula ARM Transaction
Common TotalResponseTime t2 - t0 X0.X1
RequestDeliveryTime t'0 - t0 X1.X2
ResponseDeliveryTime t2 - t'1
GoodRequests CountEXIT
BadRequests CountFAILURE
ResponseTime t3 - t2
Reference GoodRefRequest CountEXIT X1.X2
BadRefRequests CountFAILURE
RefResponseTime t'1 - t'0

Diagram of an asynchronous callback with a synchronous implementation

Table 2. Invocation of callback
Type Statistics Formula ARM Transaction
Callback GoodCB CountEXIT X1.X3
BadCB CountFAILURE
CBTime t3 – t2

reference Reference topic

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Timestamp icon Last updated: 21 June 2010


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