Title: Blog Sample

<a name="BlogSample-TheBlogSample"></a>
# The Blog Sample


<a name="BlogSample-RunningtheBlogSample"></a>
## Running the Blog Sample


<br>

- - -
**Note:**
These instructions are for the current development stream of Aries.
Instructions for older releases can be found [here](/downloads/archived-releases.html)
Instructions for the current release of Aries can be found [here](/downloads/blogsample-0.3.html)

- - - 


<a name="BlogSample-CreatetheOSGiplatformfortheBlogsample"></a>
### Create the OSGi platform for the Blog sample

Download and build the development stream of Aries, see [here](/development/buildingaries.html)

    cd samples/blog/blog-assembly/target
    mkdir load

The full Aries build builds the blog sample by default, all of the platform pre-reqs will be available in the target directory.
Create the load directory. This used to be done automatically by Felix file install, but in more recent
versions yo have to create your own.
<a name="BlogSample-RunningtheBlogsample"></a>
### Running the Blog sample


Start Aries in an OSGi framework (we're using Eclipse Equinox in this
case)

    java -jar osgi-3.5.0.v20090520.jar -console


The OSGi console should start up, the 'ss' command should show all of the
platform bundles in state 'ACTIVE'.

To run the blog application (.eba file) copy 

    samples/blog/blog-jdbc-eba/target/*.eba

into the load directory.

Point your browser to [http://localhost:8080/blog/](http://localhost:8080/blog/)

If you subsequently delete the .eba from the load directory the application
will be uninstalled.

<a name="BlogSample-RunningthesampleusingaJPApersistencelayer"></a>
### Running the sample using a JPA persistence layer

The first blog sample application was written to use a JDBC persistence
layer. There is a second application implemented to demonstrate the JPA
capability

To run the blog sample which uses the JPA persistence layer, start the OSGi
framework as before, remove any previous copies of the blog sample from the
target/load directory, then copy 

    samples/blog/blog-jpa-eba/target/*.eba

into the load directory.

Finally, after typing 'refresh' at the OSGi console, point your browser at [http://localhost:8080/blog/](http://localhost:8080/blog/)
. You should see something that looks precisely the same as the blog sample
running with the JDBC persistence layer, but this time running using the
JPA persistence layer.


<a name="BlogSample-AbouttheBlogsample"></a>
## About the Blog sample

The blog sample components can be visualised like this:

![bs](BlogSample.png)