*/
private static String getActivationId(final Activation activation) {
final StringBuilder result = new StringBuilder( activation.getRule().getName() );
result.append( " [" );
final Tuple tuple = activation.getTuple();
final FactHandle[] handles = tuple.toFactHandles();
for ( int i = 0; i < handles.length; i++ ) {
result.append( ((InternalFactHandle) handles[i]).getId() );
if ( i < handles.length - 1 ) {
result.append( ", " );
}