PAK Core – ILiteServiceProvider
The PAK-Core harbors the core functionality of the PAK-framework. It enables the creation, fetching and execution of Commands.
Every component within the core-module, plays a vital part in PAK. This chapter describes the functionality of the ILiteServiceProvider interface.
1. Basics
ILiteServiceProvider is extending the ILiteService interface, which makes it a LiteService. This Service can therefore be injected
by using the @LiteService annotation and works only in Java Commands. It’s an interface for fetching LiteServices.
2. Usage
There are two methods within the ILiteServiceProvider interface:
-
getCommandRestService(), returns an instance ofICommandRestService, if it is available within the Context. If not, null is returned. -
find(Class<T extends ILiteService> clazz), finds other custom registered Services, extendingILiteServicewithin the Context. Returns null, if the Service does
not exist.
3. Register
Don’t forget to register the implementing class of ILiteServiceProvider to the PAK-framework. This: Guide will show you how.
Listing 1 shows how to inject and use ICommandRestService
@ICommandRestService/**
* @workflowDocu Sample-command, using ICommandRestService
*/
@JavaCommand
@CommandGroup("LiteService")
public class ServiceProviderCommand {
@LiteService (1)
ILiteServiceProvider liteServiceProvider;
/**
* @workflowDocu Store response in this map
*/
@Persistent(scope = FieldScope.WRITE_ONLY)
Map<String, Object> resultMap;
@Run
public void run() {
final IEndpointClientService endpointClientService = this.liteServiceProvider.getCommandRestService()
.createEndpointClientServiceFor("myRequesterId"); (2)
[...]
}
}| 1 | Use of @LiteService, to inject ILiteServiceProvider. |
| 2 | Build an instance of IEndpointClientService, by getting an instance of ICommandRestService from ILiteServiceProvider,using the method getCommandRestService(). |