The similarity between integrating Design Engine API and integrating Report Engine API

Integrating Design Engine API Framework:

//Configure the Engine and start the Platform
DesignConfig config = new DesignConfig( );

config.setProperty("BIRT_HOME", "C:/birt-runtime-2_1_1/birt-runtime-2_1_1/ReportEngine");
IDesignEngine engine = null;
try{
Platform.startup( config );
IDesignEngineFactory factory = (IDesignEngineFactory) Platform
.createFactoryObject( IDesignEngineFactory.EXTENSION_DESIGN_ENGINE_FACTORY );
engine = factory.createDesignEngine( config );
}catch( Exception ex){
ex.printStackTrace();
}
//create Session,Elements,etc
........
// Save the design and close it.
design.saveAs( "c:/tmp/sample.rptdesign" ); //$NON-NLS-1$
design.close( );

Integrating Report Engine API Framework:

try{
config = new EngineConfig( );
config.setEngineHome( "C:/birt-runtime-2_1_0/birt-runtime-2_1_0/ReportEngine" );
config.setLogConfig(c:/temp, Level.FINE);

Platform.startup( config );
IReportEngineFactory factory = (IReportEngineFactory) Platform
.createFactoryObject( IReportEngineFactory.EXTENSION_REPORT_ENGINE_FACTORY );
engine = factory.createReportEngine( config );
engine.changeLogLevel( Level.WARNING );
}catch( Exception ex){
ex.printStackTrace();
}
// Run reports, etc.
......
// Shut down the engine.
try
{
engine.shutdown();
Platform.shutdown();    
}
catch ( EngineException e1 )
{
    // Ignore
}

Reference:
1.http://www.eclipse.org/birt/phoenix/deploy/designEngineAPI.php
2.http://www.eclipse.org/birt/phoenix/deploy/reportEngineAPI.php