msakamoto-sf/javaserviceproviderinterfacedemo

Simple Demos for Java's SPI(Service Provider Interface) and java.util.ServiceLoader usage.

JavaServiceProviderInterfaceDemo

Simple Demos for Java's SPI(Service Provider Interface) and java.util.ServiceLoader usage.

Introduction

This demo app include 6 tiny jar projects.

1. CloudService

• Demonstrates pseudo "Cloud Service" providers.
• Defines spidemo.cloud.spi.Cloud interface for service provider.
• Provides spidemo.cloud.CloudService utility class to wrap java.util.ServiceLoader<Cloud> operations.

2. SearchService

• Demonstrates pseudo "Keyword Search Service" providers.
• Defines spidemo.search.spi.Search interface for service provider.
• Provides spidemo.search.SearchService utility class to wrap java.util.ServiceLoader<Search> operations.

3. FooProvider

• Implementations for CloudService and SearchService.

4. BarProvider

• Includes two implementations for SearchService.

5. BazProvider

• Implementation for CloudService.

6. DemoApp

• client app for CloudService and SearchService.
• Implementations self providers for both CloudService and SearchService.

Requirements

• JDK 1.6 or over
• Ant 1.8.x or over

Build and Run

Run default Ant target.

$ ant
run:
     [java] Provider Name: My Cloud Provider
     [java] My Container
     [java] My Tomcat
     [java] Provider Name: Foo Cloud Provider
     [java] Foo VPC
     [java] Foo VPN
     [java] Foo Shared Server
     [java] Foo Dedicated Server
     [java] Provider Name: Baz Cloud Provider
     [java] Baz Xen Computing
     [java] Baz Security Gateway
     [java] Baz Shared Storage
     [java] Provider Name: My Search Provider
     [java] My Search 1
     [java] My Search 2
     [java] Provider Name: Foo Search Provider
     [java] Foo Search 1
     [java] Foo Search 2
     [java] Foo Search 3
     [java] Provider Name: Bar Search Provider
     [java] Bar Search 1
     [java] Bar Search 2
     [java] Bar Search 3
     [java] Provider Name: Bar Search2 Provider
     [java] Bar2 Search 1
     [java] Bar2 Search 2
     [java] Bar2 Search 3

BUILD SUCCESSFUL
Total time: 12 seconds

References

• Introduction to the Service Provider Interfaces (The Java™ Tutorials > Sound)
  • https://docs.oracle.com/javase/tutorial/sound/SPI-intro.html
• Creating Extensible Applications (The Java™ Tutorials > The Extension Mechanism > Creating and Using Extensions)
  • https://docs.oracle.com/javase/tutorial/ext/basics/spi.html
• ServiceLoader (Java Platform SE 7 )
  • https://docs.oracle.com/javase/7/docs/api/java/util/ServiceLoader.html

(Japanese Language)

• ServiceLoader (Java Platform SE 7 )
  • https://docs.oracle.com/javase/jp/7/api/java/util/ServiceLoader.html
• Jarファイルメモ(Hishidama's java-archive Memo)
  • http://www.ne.jp/asahi/hishidama/home/tech/java/jar.html#h_Service_Provider