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Service provider interface
From HandWiki - Reading time: 2 min
Service provider interface (SPI) is an API intended to be implemented or extended by a third party. It can be used to enable framework extension and replaceable components.[1][2][3]
Details
From Java documentation:
A service is a well-known set of interfaces and (usually abstract) classes. A service provider is a specific implementation of a service. The classes in a provider typically implement the interfaces and subclass the classes defined in the service itself. Service providers can be installed in an implementation of the Java platform in the form of extensions, that is, jar files placed into any of the usual extension directories. Providers can also be made available by adding them to the application's class path or by some other platform-specific means.[4]
The concept can be extended to other platforms using the corresponding tools. In the Java Runtime Environment, SPIs are used in:[1][2]
- Java Database Connectivity
- Java Cryptography Extension
- Java Naming and Directory Interface
- Java API for XML Processing
- Java Business Integration
- Java Sound
- Java Image I/O
- Java File Systems
See also
References
- ↑ 1.0 1.1 "Introduction to the Service Provider Interfaces". Oracle Java Documentation. http://docs.oracle.com/javase/tutorial/sound/SPI-intro.html. "Services are units of sound-handling functionality that are automatically available when an application program makes use of an implementation of the Java Sound API"
- ↑ 2.0 2.1 Thribhuvan Thakur (November 18, 2009). "Service Provider Interface: Creating Extensible Java Applications". Developer.com. http://www.developer.com/java/article.php/3848881/Service-Provider-Interface-Creating-Extensible-Java-Applications.htm. "A service provider interface (SPI) is the set of public interfaces and abstract classes that a service defines. A SPI may be represented by a single interface (type) or abstract class or a set of interfaces or abstract classes that define the service contract."
- ↑ "Replaceable Components and the Service Provider Interface". Software Engineering Institute (CMU). July 2002. http://resources.sei.cmu.edu/library/asset-view.cfm?assetid=5901.
- ↑ "ServiceLoader". http://docs.oracle.com/javase/7/docs/api/java/util/ServiceLoader.html.
External links
- Replaceable Components and the Service Provider Interface (.pdf at The Software Engineering Institute CMU)
- Official Java API documentation: java.util.class and [http://com/javase/4/docs/api/java/util/spi/package-estary.html java.util.spi package
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