question: public static boolean computeInstancesStartedStateWithAcceptedErrorRate ( AmazonEC2AsyncClient client , VerificationHost host , List < String > instanceIds , int errorRate ) throws Throwable { if ( instanceIds . size ( ) == 0 ) { return false ; } ArrayList < Boolean > provisioningFlags = new ArrayList < Boolean > ( instanceIds . size ( ) ) ; for ( int i = 0 ; i < instanceIds . size ( ) ; i ++ ) { provisioningFlags . add ( i , Boolean . FALSE ) ; } checkInstancesStarted ( host , client , instanceIds , provisioningFlags ) ; int totalCount = instanceIds . size ( ) ; int passCount = ( int ) Math . ceil ( ( ( ( 100 - errorRate ) / HUNDERED ) * totalCount ) ) ; int poweredOnCount = 0 ; for ( boolean startedFlag : provisioningFlags ) { if ( startedFlag ) { poweredOnCount ++ ; } } return ( poweredOnCount >= passCount ) ; }
target:  Method that polls to see if the instances provisioned have turned ON.This method accepts an error count to allow some room for errors in case all the requested resources are not provisioned correctly.