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Difference between revisions of "Tutorial: Building your first OSGi Remote Service"

(Define a Service Interface)
(Introduction)
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==Introduction==
 
==Introduction==
  
The OSGi specification defines a very simple model to expose Services within a local runtime.  With recent versions of the Enterprise Specification, a distribution provider may be used to export Services and make them available for remote access.  ECF provides an implementation of this Remote Services specification.
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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 and expose that service for remote access via ECF's implementation of the OSGi Remote Services standard.
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This tutorial will show how to  
 +
 
 +
#define and implement a simple OSGi service
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#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

  1. define and implement a simple OSGi service
  2. 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();
 
}

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