I want to make this example so simple, so we start.<\/p>\n
2. What do We Need?<\/h2>\n\n- IDE: Eclipse Luna 4.4, you can download here<\/a><\/li>\n
- Gradle 2.x or superior, you can download Gradle 2.5 here<\/a><\/li>\n
- Java JDK 1.7_75 or superior, download here<\/a><\/li>\n
- BND Tools 2.4, this is a Eclipse Plugin that we can download in Eclipse Marketplace<\/li>\n
- Gradle-Osgi Plugin, you can get more detail here<\/a><\/li>\n<\/ul>\n
3. Environment Configuration<\/h2>\n
To make simpler the example, we assume that you have already installed your Eclipse, JDK, Gradle and environment variables for both tools (JAVA_HOME and GRADLE_HOME).<\/p>\n
How to Install OSGi?<\/p>\n
It’s the most simple installation ever, you only need to download Eclipse! Eclipse is one the projects that use OSGi for your development and release process, so OSGi, Equinox and Felix frameworks are already installed as Eclipse’s plugins.<\/p>\n
Next Step, Install BND Tools Eclipse Plugin.<\/p>\n
Please download and install from Eclipse Marketplace using the menu: Help > Eclipse Marketplace > type “bndtools”.<\/p>\n
![\"BND](\"http:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2015\/07\/bndtoolsinstall.jpg\")
<\/a>BND Tools Eclipse Plugin installation<\/figcaption><\/figure><\/p>\n4. Creating OSGi Project<\/h2>\n
Create a new OSGi bundle project using File > New > Other > Bndtools > Bndtools OSGi project<\/p>\n
![\"BND](\"http:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2015\/07\/osgiBndToolsProject.jpg\")
<\/a>BND Tools OSGi Project<\/figcaption><\/figure><\/p>\nThen, type a project’s name and keep all the other settings as they are, then click next to choose project template, in this case, we use OSGi component development by default.<\/p>\n
![\"OSGi](\"http:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2015\/07\/osgi-project-template.jpg\")
<\/a>OSGi Project Template<\/figcaption><\/figure><\/p>\nSo, when we create the first OSGi project, bnd tools ask to create a cnf project, that will store all OSGi configuration and libraries downloaded from external repositories. Only click next and leave all configurations by default, at the end we have 2 projects cnf (bnd tools configuration) and our Gradle OSGi project.
<\/div> <\/div><\/p>\n![\"BND](\"http:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2015\/07\/bnd-tools-cnf-project.jpg\")
<\/a>BND Tools CNF Project<\/figcaption><\/figure><\/p>\nThen, define a package for the Bundle Activator and create a new class, we call HelloActivator.java<\/p>\n
![\"Gradle](\"http:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2015\/07\/Gradle-OSGi-BundleProject2.jpg\")
<\/a>Gradle OSGi BundleProject<\/figcaption><\/figure><\/p>\nHelloActivator.java<\/em><\/span><\/p>\npackage com.javacodegeeks.gradle.osgi;\n\nimport org.osgi.framework.BundleActivator;\nimport org.osgi.framework.BundleContext;\n\npublic class HelloActivator implements BundleActivator {\n\tprivate BundleContext context;\n\n\tpublic void start(BundleContext context) throws Exception {\n\t\tSystem.out.println(\"Hello JCG, Welcome to OSGi World!!\");\n\t\tthis.context = context;\n\t}\n\n\t\/*\n\t * (non-Javadoc)\n\t * \n\t * @see\n\t * org.osgi.framework.BundleActivator#stop(org.osgi.framework.BundleContext)\n\t *\/\n\tpublic void stop(BundleContext context) throws Exception {\n\t\tSystem.out.println(\"Goodbye JCG\");\n\t\tthis.context = null;\n\t}\n\n}\n<\/pre>\n5. Deploying OSGi Project<\/h2>\n
The last step before injects Gradle is to deploy the Bundle in an OSGi container, in this example we use Apache Felix. To make possible this, we need to configure bnd.bnd file.<\/p>\n
Define a version number, choose the Activator that we created before. In the Export Packages please choose the green plus sign, and add the main package that contains the Activator.<\/p>\n
3. Environment Configuration<\/h2>\n
To make simpler the example, we assume that you have already installed your Eclipse, JDK, Gradle and environment variables for both tools (JAVA_HOME and GRADLE_HOME).<\/p>\n
How to Install OSGi?<\/p>\n
It’s the most simple installation ever, you only need to download Eclipse! Eclipse is one the projects that use OSGi for your development and release process, so OSGi, Equinox and Felix frameworks are already installed as Eclipse’s plugins.<\/p>\n
Next Step, Install BND Tools Eclipse Plugin.<\/p>\n
Please download and install from Eclipse Marketplace using the menu: Help > Eclipse Marketplace > type “bndtools”.<\/p>\n
Create a new OSGi bundle project using File > New > Other > Bndtools > Bndtools OSGi project<\/p>\n Then, type a project’s name and keep all the other settings as they are, then click next to choose project template, in this case, we use OSGi component development by default.<\/p>\n So, when we create the first OSGi project, bnd tools ask to create a cnf project, that will store all OSGi configuration and libraries downloaded from external repositories. Only click next and leave all configurations by default, at the end we have 2 projects cnf (bnd tools configuration) and our Gradle OSGi project. Then, define a package for the Bundle Activator and create a new class, we call HelloActivator.java<\/p>\n HelloActivator.java<\/em><\/span><\/p>\n The last step before injects Gradle is to deploy the Bundle in an OSGi container, in this example we use Apache Felix. To make possible this, we need to configure bnd.bnd file.<\/p>\n Define a version number, choose the Activator that we created before. In the Export Packages please choose the green plus sign, and add the main package that contains the Activator.<\/p>\n<\/a>4. Creating OSGi Project<\/h2>\n
<\/a><\/a><\/a><\/a>package com.javacodegeeks.gradle.osgi;\n\nimport org.osgi.framework.BundleActivator;\nimport org.osgi.framework.BundleContext;\n\npublic class HelloActivator implements BundleActivator {\n\tprivate BundleContext context;\n\n\tpublic void start(BundleContext context) throws Exception {\n\t\tSystem.out.println(\"Hello JCG, Welcome to OSGi World!!\");\n\t\tthis.context = context;\n\t}\n\n\t\/*\n\t * (non-Javadoc)\n\t * \n\t * @see\n\t * org.osgi.framework.BundleActivator#stop(org.osgi.framework.BundleContext)\n\t *\/\n\tpublic void stop(BundleContext context) throws Exception {\n\t\tSystem.out.println(\"Goodbye JCG\");\n\t\tthis.context = null;\n\t}\n\n}\n<\/pre>\n5. Deploying OSGi Project<\/h2>\n
![\"OSGi-Bundle-Content\"](\"http:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2015\/07\/OSGi-Bundle-Content.jpg\")
<\/a>![\"OSGi](\"http:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2015\/07\/OSGi-run-bnd-tools.jpg\")
<\/a>![\"Testing](\"http:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2015\/07\/test-gradle-osgi-integration.jpg\")
<\/a>