Merged prod cons

Please take a closer look, if everything is ok. All tests did run without errors.

Afterwards -> delete "prod-cons-abstraction" branch

src/main/java/teetime/framework/AbstractStage.java

@@ -33,6 +33,7 @@ public abstract class AbstractStage implements Stage {
protected OutputPort<?>[] cachedOutputPorts;
private final Map<ISignal, Void> visited = new HashMap<ISignal, Void>();
+	private boolean shouldTerminate;
public AbstractStage() {
this.id = UUID.randomUUID().toString(); // the id should only be represented by a UUID, not additionally by the class name
@@ -125,7 +126,7 @@ public abstract class AbstractStage implements Stage {
}
public void onTerminating() throws Exception {
-		// empty default implementation
+		terminate();
}
protected <T> InputPort<T> createInputPort() {
@@ -162,4 +163,19 @@ public abstract class AbstractStage implements Stage {
return this.getClass().getName() + ": " + this.id;
}
+	@Override
+	public void terminate() {
+		this.shouldTerminate = true;
+	}
+
+	@Override
+	public boolean shouldBeTerminated() {
+		return this.shouldTerminate;
+	}
+
+	@Override
+	public TerminationStrategy getTerminationStrategy() {
+		return TerminationStrategy.BY_SIGNAL;
+	}
+
}