Apama 10.3 | Apama Documentation | Developing Apama Applications | Developing Apama Applications in EPL | Using EPL Plug-ins
 
Using EPL Plug-ins
 
Overhead of using plug-ins
When to use plug-ins
When not to use plug-ins
Using the TimeFormat Event Library
Using the MemoryStore
Using the distributed MemoryStore
Using the Management interface
Using the JSON plug-in
Using MATLABĀ® products in an application
Using the R plug-in
Interfacing with user-defined EPL plug-ins
About the chunk type
In EPL programs (monitors and queries), you can use standard EPL plug-ins provided with Apama and you can also use EPL plug-ins that you define yourself. An EPL plug-in consists of an appropriately formatted library of C++ functions, which can be called from within EPL code. In the case of a plug-in written in Java, the Java classes that are called from an application's EPL code are contained in a jar file. The correlator does not need to be modified to enable or to integrate with a plug-in, as the plug-in loading process is transparent and occurs dynamically when required.
To write custom EPL plug-ins, see Developing EPL Plug-ins.
When using a plug-in, you can call the functions it contains directly from EPL, passing EPL variables and literals as parameters, and getting return values that can be manipulated.

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