Osgi on Micha Kops' Tech Notes

Snippet: Java 9 Modules and JPMS

Mon, 17 Apr 2017 00:00:00 +0200

Playing around with the new module system in Java 9 I simply wanted to write down how to achieve the most basic tasks.

Therefore I created the following module how-to based upon a simple demonstration project consisting of two dependant modules.

Figure 1. Modules Component-Diagram

Prerequisites and Setup

We need an early access build of the Java ™ 9 JDK, available for download here.

In addition we should make sure, that our environment variable JAVA_HOME is set to the corresponding directory and calling java -version returns something similar to this:

Wiring made easy using OSGi Blueprint and Apache Karaf

Mon, 16 Apr 2012 00:00:00 +0200

The OSGi Blueprint Container specification allows us to use dependency injection in our OSGi environment, declarative import and export of OSGi services, registering lifecycle listeners and wiring dependencies into our services with a few lines of XML code.
In the following tutorial we’re first building an OSGi bundle classical style and afterwards take a trip into the advantages of the Blueprint specification.

Our OSGi container of choice here will be Apache Karaf a lightweight container with a lot of nice features and – of course – blueprint enabled…

Confluence Social Comments Plugin

Mon, 30 May 2011 00:00:00 +0200

I have created a new, free plugin for Confluence, the popular enterprise wiki.

The plugin allows you to notify users of ongoing discussions in comments on a confluence page by posting a specific token including the user’s name like this: “@username:”

Features

Configurable notification settings in the administration area
Several placeholders to be used in the e-mail template for the notifications
User filtering to avoid sending duplicate e-mails
For more detailed information take a look at the Maven generated project website

How to create a Confluence SOAP Component in 5 Minutes

Sun, 24 Oct 2010 00:00:00 +0200

You’re using the popular Confluence wiki? You’re using its RPC/SOAP API and missing a function you really need? Just extend the capabilities of the Confluence RPC API by programming a custom web service component – it is really easy and also well documented.

In this tutorial we’re going to take a look on how to quickly implement a SOAP service, securing it and putting its methods in a transactional context.

Prerequisites

Maven >=2
JDK >= 5
Confluence Wiki >= 3.0 (for a quick installation guide take a look at this article)
SoapUI for Testing

How to create a simple OSGi Web Application using Maven

Sun, 25 Jul 2010 00:00:00 +0200

In this tutorial we will take a look at the development of a simple OSGi Web Application and what tools can save us some time.

The Maven Bundle Plugin makes our life much easier here as does the OSGi Bundle Repository that offers some nice bundles – in our case the servlet API and an embedded Jetty web server.

So lets develop some bundles ..

Prerequisites

You are going to need a JDK (>=5), Maven2, the Apache Felix OSGi implementation and and text editor/http://eclipse.org/[IDE] of your choice.

Atlassian Snippets

Mon, 01 Mar 2010 00:00:00 +0100

Disable YUI compressor

<plugin>
    <groupId>com.atlassian.maven.plugins</groupId>
    <artifactId>maven-jira-plugin</artifactId>
    <version>${amps.version}</version>
    <extensions>true</extensions>
    <configuration>
        <compressResources>false</compressResources>
        [..]
    </configuration>
</plugin>

Confluence – Get favourites by user

Using the label manager.

List getFavouriteSpaces(String username)

Confluence – Determine the base URL

Using the SettingsManager:

String baseUrl = settingsManager.getGlobalSettings().getBaseUrl();

Confluence – Get the context path

Using the BootstrapManager:

String contextPath = bootstrapManager.getWebAppContextPath();

Confluence – Using Velocity Template for a Macro

final VelocityContext contextMap = new VelocityContext(MacroUtils.defaultVelocityContext());

contextMap.put("key", obj); // references obj as variable named $key in the velocity template

VelocityUtils.getRenderedTemplate("path/to/template.vm", contextMap);