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Difference between revisions of "Tutorial: Building your first OSGi Remote Service"
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==Introduction== | ==Introduction== | ||
| − | The OSGi | + | The OSGi Framework provides a very simple model to expose services within a local runtime. Also available, however, is a specification of Remote Services...services that are exported by a distribution provider to allow remote access. The ECF project implements a specification-compliant distribution provider. |
| − | This tutorial will show how to define a simple OSGi service | + | This tutorial will show how to |
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| + | #define and implement a simple OSGi service | ||
| + | #expose that service for remote access via ECF's implementation of the OSGi Remote Services standard | ||
==Define a Service Interface== | ==Define a Service Interface== | ||
Revision as of 23:39, 5 December 2013
Introduction
The OSGi Framework provides a very simple model to expose services within a local runtime. Also available, however, is a specification of Remote Services...services that are exported by a distribution provider to allow remote access. The ECF project implements a specification-compliant distribution provider.
This tutorial will show how to
- define and implement a simple OSGi service
- expose that service for remote access via ECF's implementation of the OSGi Remote Services standard
Define a Service Interface
The key to building a system with low coupling and high cohesion is to define clear and coherent boundaries between different parts of your system. Central to this is defining a simple Service Interface...to allow one subsystem to interact with another subsystem, but only in clearly defined ways.
For this example, we are going to define a simple Time Service:
public interface ITimeService { public Long getCurrentTime(); }