k1729p / Study20

Study20 README Contents

Research Java Platform Module System (JPMS)

The diagram of the JPMS modules

Java module declarations

Maven Module Name	JPMS Module Name	Module Descriptor Link
service	kp.service	'module-info.java'
service-provider	kp.provider	'module-info.java'
service-client	kp.client	'module-info.java'

Java source code. Packages:

module 'service': kp.service
module 'service-provider': kp.provider
module 'service-client': kp.client

module 'service': Java API Documentation
module 'service-provider': Java API Documentation
module 'service-client': Java API Documentation

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Action:

1. Build and run the 'KpServiceClient' with the batch file '01 MVN clean install + Run Application.bat'.

1. Alternative action: build and run the 'KpServiceClient' with the batch file '02 Create Image And Run.bat'.
This process uses the local Maven repository.
It creates the run-time image with the Java linker jlink and uses the generated runtime for execution.

2. The service registering and loading.

The diagram of the service registering and loading

The two providers of the 'kp.service.KpService' implementation:

• 'kp.provider.KpServiceProviderSimple',
  the providing method: 'kp.provider.KpServiceProviderSimple::provider'
• 'kp.provider.KpServiceProviderComplex',
  the providing method: 'kp.provider.KpServiceProviderComplex::provider'

3. The main client method: 'kp.client.KpServiceClient::main'.
With the method 'java.util.ServiceLoader::load' the service providers are located and loaded.
The service method: 'kp.service.KpService::launch'.

The sequence diagram

The screenshot of the console log.

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