Exporting Camel Endpoints as OSGi Services

It is often useful to proxy calls to services exported by a Blueprint context through a service bus. The bus could be used to log incoming calls, adapt/filter the call arguments and the result, transparently forward requests to a remote OSGi container, broadcast to several remote containers or forward to the more powerful Fuse Fabric endpoints. Exporting a regular interface to a Camel endpoint is key to this functionality.

AngularJS using the HTTP Whiteboard Service

The HTTP Whiteboard service extends the OSGi HTTP service by automatically registering servlets, filters and resource mappings with the embedded servlet container. An AngularJS application consists of static resources that can easily be deployed in any HTTP server. The deployment of AngularJS in Blueprint leverages the HTTP Whiteboard service.

Activiti Explorer Tips

The Activiti Explorer is a user interface for managing Activiti workflow processes. The Activiti Explorer is useful not only as a visual debugging tool but also as a generic back office for mdeployed processes. In order to use the Activiti Explorer as a management tool for deployed processes certain changes are required in the Activiti Explorer configuration and a minor provision in the processes design.

Spring Data MongoDB in OSGi Blueprint

Spring Data is yet another extremely useful Spring subproject that is so tightly coupled with the Spring-specific container features, that it has become very hard to deploy it in Blueprint.

The alternative to an adaptation to Blueprint is (once again) mixing Spring DM and Blueprint bundles and importing Spring DM services into Blueprint contexts.

Apache ActiveMQ Virtual Topics

[toc] Load Balancing with Queues The property of queues, that requires that any given message is delivered only to a single consumer, provides a reliable mechanism to load balance workload between multiple consumers of the queue. In addition to a simple round-robin load-balancing between consumers (which is the default for queues), ActiveMQ offers more advanced Read more about Apache ActiveMQ Virtual Topics[…]

Developing a REST Service in Apache Karaf

This article focuses on the implementation of a REST service that can be deployed on Apache Karaf using the excellent HTTP Whiteboard service. In the first part, we will concentrate on building a REST service with Apache CXF and exporting it with the HTTP Whiteboard. In the second part, we will elaborate on securing the service using Spring Security.