Difference between revisions of "OSGi : Develop Simple Apps"

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* [http://www.osgi.org/javadoc/r4v42/org/osgi/framework/BundleActivator.html BundleActivator]
 
* [http://www.osgi.org/javadoc/r4v42/org/osgi/framework/BundleActivator.html BundleActivator]
  
<h4>2. Define the Bundle that provide the service (Provider Bundle)</h4>
+
<h4>2. Define the Bundle Service Provider</h4>
<h5>2.1 Define the Java Interface that exposes the services</h5>
+
<h5> 2.1 Define the Generic Bundle Service Provider</h5>
 +
 
 +
<h5>2.1.1 Define the Java Interface that exposes the services</h5>
 
Let us suppose that you want to define a service that allows the user to find a book from the book isbn. Then the interface should look similare with this one:
 
Let us suppose that you want to define a service that allows the user to find a book from the book isbn. Then the interface should look similare with this one:
 
<source lang="java">
 
<source lang="java">
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Export-Package: cs.ecl.osgi.simple.bookfinder
 
Export-Package: cs.ecl.osgi.simple.bookfinder
 
</source>
 
</source>
<h5>2.1 Define the Java classes that implement that services</h5>
+
 
 +
<h5>2.2 Define the Concrete Bundle Provider</h5>

Revision as of 16:04, 22 January 2011


OSGi Activities



Start the lab activities in the order defined below:

  1. Check out the Service Interface
  2. Check out the Service Provider
  3. Check out the Service Consumer

Steps for Building Bundels

1. Study the Interfaces

2. Define the Bundle Service Provider

2.1 Define the Generic Bundle Service Provider
2.1.1 Define the Java Interface that exposes the services

Let us suppose that you want to define a service that allows the user to find a book from the book isbn. Then the interface should look similare with this one:

package cs.ecl.osgi.simple.bookfinder;

public interface BookFinder {
	Book findBook(int isbn) throws BookNotFoundException;
}

Define in the same bundle the classes that you need such as: Book and BookNotFoundException

package cs.ecl.osgi.simple.bookfinder;

public class Book {
	private int isbn;
	private String title;
	
	public Book(int isbn, String title) {
		super();
		this.isbn = isbn;
		this.title = title;
	}

	public String getTitle() {
		return title;
	}

	public void setTitle(String title) {
		this.title = title;
	}

	public int getIsbn() {
		return isbn;
	}

	public void setIsbn(int isbn) {
		this.isbn = isbn;
	}
}

package cs.ecl.osgi.simple.bookfinder;

public class BookNotFoundException extends Exception {
	private static final long serialVersionUID = -6184839510952070091L;

	public BookNotFoundException() {
		super();
	}

	public BookNotFoundException(String arg0) {
		super(arg0);
	}
}


Define in the MANIFEST.MF that cs.ecl.osgi.simple.bookfinder is the Exported-Package

Manifest-Version: 1.0
Bundle-ManifestVersion: 2
Bundle-Name: Bookfinder
Bundle-SymbolicName: cs.ecl.osgi.simple.bookfinder
Bundle-Version: 1.0.0.qualifier
Bundle-RequiredExecutionEnvironment: JavaSE-1.6
Bundle-Vendor: Seneca College - Eclipse Course
Export-Package: cs.ecl.osgi.simple.bookfinder
2.2 Define the Concrete Bundle Provider