Progress Sonic ESB Configuration and Management Guide

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Instrumenting Sonic ESB The result of enabling ESB container instrumentation looks like the following: Figure 6. Enabled ESB Container Instrumentation 6. On the management container that hosts the ESB Container, specify the location of the uplink.cfg file. For more information, “Specifying the Uplink Configuration Location in Sonic” . The container logs the information, as shown for this example where the myESB ESB container was enabled and hosts the dev_CBR Service: Code Sample 1. ESB Container Log of Actional Instrumentation Information [date-time] ID=My ESB (info) [ESBService] Initializing Service 'dev.CBR' [date-time] ID=My ESB (info) [ESBService] Service 'dev.CBR' initialized: 1 thread(s) listening on Endpoint dev.CBR.Entry [date-time] ID=My ESB (info) Actional instrumentation is enabled for this container [date-time] ID=My ESB (info) Actional payload capture is disabled. [date-time] ID=My ESB (info) Actional agent is running. [date-time] ID=My ESB (info) Initializing Mitigation context factory class: com.sonicsw.xqimpl.actional.lg.visitor.StabilizerHelper [date-time] (info) Loaded ID=My ESB Progress Sonic ESB Configuration and Management Guide 8.5 264
Chapter 11: Using Actional with Sonic Components Using Stabilizers with Sonic ESB From within ESB at runtime, the value of stabilizer switches can be obtained from the service context. A stabilizer switch is a custom-defined flag set by the Actional Management Server to indicate certain user-specified system conditions. It can be used by ESB to set up custom routing in response to changing network or application conditions. You can access stabilizers in three ways: through interfaces in the Sonic ESB API, through JavaScript, and through XPath. If Actional is not instrumented for the ESB container, then accessing stabilizers with any of the three mechanisms will always return false. If no stabilizer switch is defined, then these return false as well. Accessing Stabilizers in the Sonic ESB API This example uses the XQMitigationContext and XQServiceContext interfaces from the com.sonicsw.xq package. Custom ESB services written in Java can call these methods starting with the service context instance passed to the service() method. More commonly, however, stabilizer switches will be used from within a Content Base Routing (CBR) step in an ESB process. This allows the ESB process to route messages, at runtime, based on the value of a stabilizer switch. First, the application must retrieve an instance of XQMitigationContext, by calling the following method on the XQServiceContext interface: public XQMitigationContext getMitigationContext() Then, on the returned object, call this method to return the value of the switch: public boolean getMitigationSwitch(java.lang.String switchName) This method returns false if the switch is not defined. Acccessing Stabilizers in Javascript Typically, a CBR step in a process is configured to use a Javascript program to perform the routing logic. The Javascript program must define a function called rule() that ESB 265 Progress Sonic ESB Configuration and Management Guide 8.5
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Contents Chapter 12: Using Actional
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Preface About This Guide This guide
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Preface 21 Progress Sonic ESB Confi
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Progress Sonic ESB Configuration and Management Guide

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