# Scout/Tutorial/5.0/UpdateWithF2

< Scout‎ | Tutorial‎ | 5.0

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F2 is a simple update manager created by BSI. In this tutorial you learn how to update a scout client application with F2.

## Prerequisites

We assume that you already have installed Scout. You also need to create a new Scout application that you will be updating with this tutorial. Create a new Scout Project called org.eclipse.scout.helloworld.

Adding F2 Support can be done by simply selecting the root node of the project in the Scout Explorer and checking the technology checkbox F2 Support:

In the Change Technology Dialog check all checkboxes to add f2 as a dependency to your Manifest files and include it in the client product files. Accept the license, wait until the update is installed and restart eclipse when asked.

## Add Automatic Update to Client

### Calling F2 during Client Startup

Now you can add the code to update your client application automatically after startup, if an update is needed. You can do that by simply calling F2Updater.update with update strategy DoUpdate and a new EclipseUserAgent. UpdateResult.UpdateSuccessful indicates that there was actually something updated and the update was successful. In development mode updating the application does not make sense. Therefore make sure there is never an update done in development mode.

Putting it all together leads to the following changes that need to be done in org.eclipse.scout.helloworld.ui.swing.SwingApplication.startSecure:

//...
private Object startSecure(IApplicationContext context) throws Exception {
try {
NetActivator.install();
}
catch (Throwable t) {
// no net handler found
LOG.warn("NetActivator is not available", t);
}
if (Platform.inDevelopmentMode()) {
if (LOG.isInfoEnabled()) {
LOG.info("No F2 update in development mode");
}
}
else {
// use f2 to update application
UpdateResult result = F2Updater.update(UpdateStrategy.DoUpdate, null, new EclipseUserAgent(getProgressMonitor(), null));
return EXIT_RESTART;
}
}
return super.start(context);
}
//...

The update in for SWT in org.eclipse.scout.helloworld.ui.swt.application.Application is quite similar:

//...
import org.eclipse.core.runtime.Platform;
//...

public class Application implements IApplication {
private static IScoutLogger LOG = ScoutLogManager.getLogger(Application.class);

//...
public Integer startSecure(final IApplicationContext context) throws Exception {
Display display = PlatformUI.createDisplay();
NetActivator.install();
if (Platform.inDevelopmentMode()) {
if (LOG.isInfoEnabled()) {
LOG.info("No F2 update in development mode");
}
}
else {
// use f2 to update application
UpdateResult result = F2Updater.update(UpdateStrategy.DoUpdate, null, new EclipseUserAgent(new NullProgressMonitor(), null));
return EXIT_RESTART;
}
}
if (PlatformUI.createAndRunWorkbench(display, new ApplicationWorkbenchAdvisor()) == PlatformUI.RETURN_RESTART) {
return EXIT_RESTART;
}
return EXIT_OK;
}
//...
}

### Configuration in config.ini

There are a number of properties that can be set for f2. At least the server URL needs to be set. Open the config.ini for swt production: In the Scout Explorer Edit the Launcher Content and add the production products.

Now we can Open the config.ini swt and set the URL to the location of the updatesite. In our case we will use localhost with port 8080. The name for our application is helloworld.

f2.url=http://localhost:8080/updatesite
f2.name=helloworld


## Initial Installation

The initial distribution of the client is not done by f2. By default the client application is available for download on the deployed server. Therefore you need to deploy your application to Tomcat first.

Download the client from the deployed server: http://localhost:8080/helloworld_server/ and install it by extracting it. We use C:\Program Files\helloworld as installation folder in this tutorial. Make sure that helloworld.exe is located under C:\Program Files\helloworld\helloworld.exe.

Add the JRE to the client, such that is also can be updated. Copy the jre folder to C:\Program Files\helloworld\jre. And update helloworld.ini to include the relative path to the jre:

-vm
jre\bin\client\jvm.dll
-vmargs
-Xms64m
-Xmx512m
-XX:MaxPermSize=256m


Start the client to see if the initial installation is correct.

In order to update a client you need to create an updatesite, which contains the information about what has to be updated. The updatesite needs to be accessed over an URL. Therefore the easiest way is usually to deploy it to your servlet container (e.g. tomcat) where your server is located as a separate web application.

For simplicity we only describe the win32 case here.

Now we create an initial upatesite for the version 1.0.0. For that purpose we copy the installec helloworld client (with the included jre), rename it to helloworld_1.0.0 and zip it such that the folder helloworld_1.0.0 is included in the zip file. On Windows just right click helloworld_1.0.0 and choose Send to->Compressed (zipped) folder.

In the tomcat webapps folder create a new folder called updatesite. Copy the following files to the updatesite:

• The exported client zip "helloworld_1.0.0.zip" to webapps/updatesite/win32/helloworld_1.0.0.zip
• The f2 plugin (/org.eclipse.update.f2_[version].jar) from the bundle pool (<workspace_location>\.metadata\.plugins\org.eclipse.pde.core\.bundle_pool\plugins) to webapps/updatesite/WEB-INF/lib/org.eclipse.update.f2_[version].jar.

You end up with the following file structure:

/webapps/updatesite/WEB-INF/lib/org.eclipse.update.f2_1.0.0.20130702-0803.jar


Now the f2 updatesite can be created using the f2 jar. We do this using the command line. First change to the tomcat webapps folder, e.g.

cd C:\tomcat-7\webapps


Then call the f2 jar. Replace [version] with the actual f2 version (e.g. 1.0.0.20130702-0803).

java -jar updatesite/WEB-INF/lib/org.eclipse.update.f2_[version].jar -create -site updatesite -os win32 -name helloworld -verbose


Now the initial updatesite is created ready for use with the following files:

updatesite\win32\helloworld_1.0.0.zip  //initial application version)
updatesite\win32\f2.txt          //contains all zip and delta files names with corresponding length, crc and hash (initially only for helloworld_1.0.0.zip)


### Test Client Update

When you restart the client the f2 updatesite is contacted and all the necessary information for later updates is downloaded. Windows User Account Control is automatically enabled by default, if the platform is win32 and the client zip contains the f2 plugin jar.

## Updating Client Application and Distributing Changes

### Change Client Application

In order to see that the update really works we first need to change the client application. We increase the project version for the helloworld project: Select the project root node in the scout explorer and change the project version to 2.0.0.

This will change the Bundle-Versions of all helloworld plugins. F2 does not require the bundle version to be changed, but we consider it is best practice for an update.

Furthermore, we change the application title in the new version: Open the scout explorer, select the desktop and change the title.

Now you can reexport the client to a temporary location.

Extact an rename it to helloworld_2.0.0. Add the JRE and update helloworld.ini as described in chapter Initial_Installation and zip helloworld_2.0.0.zip.

From the console output you see that the zip files are verified. The delta between the two versions is created and a test is executed to simulate the actual update.

C:\tomcat-7\webapps>java -jar updatesite/WEB-INF/lib/org.eclipse.update.f2_[version].jar -create -site updatesite -os win32 -name helloworld -verbose
Arguments:
verbose
create
os=win32
name=helloworld
INFO: verifying content of helloworld_1.0.0.zip
INFO: verifying content of helloworld_2.0.0.zip
INFO: helloworld_2.0.0.zip is not matching size/crc/content-hash of f2.txt. Invalidating it.
INFO: Create delta from helloworld_1.0.0 to helloworld_2.0.0
INFO: TEST: verify delta delta$helloworld_1.0.0$helloworld_2.0.0
INFO: TEST: simulating update from helloworld_1.0.0 to test-update-helloworld_1.0.0-helloworld_2.0.0
INFO: TEST: comparing zip hashes
INFO: TEST: OK
INFO: Create f2.txt
INFO: Done


Now the updatesite has the following structure:

updatesite\win32\helloworld_1.0.0.zip                         //initial application version
updatesite\win32\delta$helloworld_1.0.0$helloworld_2.0.0.zip  //delta between 1.0.0 and 2.0.0