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OSGi Remote Services and ECF

Introduction

As part of the OSGi 4.2 compendium specification is a new service-oriented architecture (SOA) standard for remote services. This standard uses the OSGi service registry to expose remote services...i.e. services that are actually implemented in external processes that are distributed on a network.

ECF's support for the OSGi standard is implemented as a layered set of application programming interfaces (APIs). This modular structure allows service creators to use an 'ala carte' model for defining, creating, deploying, integrating, and running services in their distributed application. Such an 'ala carte' model of modularity is helpful to the service builder and consumer for two primary reasons:

  1. It helps reduce system complexity. By only including technologies that are actually necessary for a given use case, rather than include functionality needed to support other use cases. For a lucid presentation about the value of modularity for simplifying complicated systems, see How Module Systems Drive Architectures.
  2. It provides flexibility. This flexibility allows consumers to mix-and-match transport protocols and serialization formats, supports interoperability and easy integration with existing systems, and supports use of synchronous and/or asynchronous invocation patterns as needed.

Here is a diagram showing the relationship between the various layered APIs in ECF's support of OSGi Remote Services.

Distributedosgi1.png

Here are two examples (with source) showing the use of ECF's remote services to expose and access a 'hello world' remote service.

  1. RFC119 - Getting Started with ECF's RFC119 Implementation
  2. Remote Services API - Getting Started with Using the ECF Remote Services API

Related Documentation

ECF API Docs

API Javadocs

Getting Started with ECF's RFC119 Implementation

Getting Started with Using the ECF Remote Services API

Distributed EventAdmin Service

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