$step3 = Operator($step1) {
 allowedLocations = 128.130.172.181/openstackpool,
 inputFormat      = step1,
 type             = "step3",
 outputFormat     = "step3",
 size             = small,
 stateful         = true,
 expectedDuration = 15,
 scalingCPUThreshold = 20,
 scalingMemoryThreshold = 55,
 queueThreshold = 11
}

$step4 = Operator($step1) {
 allowedLocations = 128.130.172.224/openstackpool,
 inputFormat      = step1,
 type             = "step4",
 outputFormat     = "step3",
 size             = small,
 stateful         = true,
 expectedDuration = 15,
 scalingCPUThreshold = 20,
 scalingMemoryThreshold = 55,
 queueThreshold = 11
}


$step2 = Operator($step1) {
 allowedLocations = 128.130.172.181/openstackpool,
 inputFormat      = step1,
 type             = "step2",
 outputFormat     = "step3",
 size             = small,
 stateful         = true,
 expectedDuration = 15,
 scalingCPUThreshold = 20,
 scalingMemoryThreshold = 55,
 queueThreshold = 11
}


$log = Sink($step2, $step3, $step4) {
 concreteLocation = 128.130.172.181/openstackpool,
 inputFormat      = "transformed data from step 5",
 type             = "log-type operator",
}

$step1 = Operator($source) {
 allowedLocations = 128.130.172.224/openstackpool,
 concreteLocation = 128.130.172.224/openstackpool,
 inputFormat      = step1,
 type             = step1,
 outputFormat     = step2,
 size             = small,
 stateful = false
}

$source = Source() {
 concreteLocation = 128.130.172.181/openstackpool,
 type             = source,
 outputFormat     = "temperature data from sensor XYZ",
 #meaningless for sources and should be ignored by parser:
 expectedDuration = 15,
 size = small
}