/**
* Moves the operators from this process to another process, keeping all connections intact. TODO:
* Test more rigorously. Do we register/unregister everything correctly?
*
* @return the number of ports the connections of which could not be restored
*/
public int stealOperatorsFrom(ExecutionUnit otherUnit) {
int failedReconnects = 0;
// remember source and sink connections so we can reconnect them later.
Map<String, InputPort> sourceMap = new HashMap<String, InputPort>();
Map<String, OutputPort> sinkMap = new HashMap<String, OutputPort>();
for (OutputPort source : otherUnit.getInnerSources().getAllPorts()) {
if (source.isConnected()) {
sourceMap.put(source.getName(), source.getDestination());
}
}
otherUnit.getInnerSources().disconnectAll();
for (InputPort sink : otherUnit.getInnerSinks().getAllPorts()) {
if (sink.isConnected()) {
sinkMap.put(sink.getName(), sink.getSource());
}
}
otherUnit.getInnerSinks().disconnectAll();
// Move operators
Iterator<Operator> i = otherUnit.operators.iterator();
while (i.hasNext()) {
Operator operator = i.next();
i.remove();
otherUnit.unregister(operator);
Process otherProcess = operator.getProcess();
if (otherProcess != null) {
operator.unregisterOperator(otherProcess);
}
this.operators.add(operator);
operator.setEnclosingProcess(null);
// operator.unregisterOperator(operator.getProcess());
registerOperator(operator, true);
// operator.registerOperator(this.getEnclosingOperator().getProcess());
}
// Rewire sources and sinks
for (Map.Entry<String, InputPort> entry : sourceMap.entrySet()) {
OutputPort mySource = getInnerSources().getPortByName(entry.getKey());
if (mySource != null) {
mySource.connectTo(entry.getValue());
} else {
failedReconnects++;
}
}
getInnerSources().unlockPortExtenders();
for (Map.Entry<String, OutputPort> entry : sinkMap.entrySet()) {
InputPort mySink = getInnerSinks().getPortByName(entry.getKey());
if (mySink != null) {
entry.getValue().connectTo(mySink);
} else {
failedReconnects++;
}
}
getInnerSinks().unlockPortExtenders();
fireUpdate(this);
return failedReconnects;
}
/**
* Removes the given operator. Don't call this method directly but call {@link Operator#remove()}.
*/
protected void removeOperator(Operator operator) {
if (!operators.contains(operator)) {
throw new NoSuchElementException(
"Operator " + operator.getName() + " not contained in " + getName() + "!");
}
int oldIndex = operators.indexOf(operator);
int oldIndexAmongEnabled = getEnabledOperators().indexOf(operator);
operators.remove(operator);
unregister(operator);
// operator.disconnectPorts();
// transformMDNeighbourhood();
Process process = getEnclosingOperator().getProcess();
if (process != null) {
process.fireOperatorRemoved(operator, oldIndex, oldIndexAmongEnabled);
}
operator.setEnclosingProcess(null);
fireUpdate(this);
}
