/**
* 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;
}
/**
* Clones operators contained in <code>original</code>, adds them to this execution unit and wires
* them as they were originally.
*
* @param forParallelExecution Indicates whether this clone is supposed to be executed in
* parallel. If yes, the clone will not be registered with the parent process and will share
* its {@link Operator#applyCount} with the original.
*/
public void cloneExecutionUnitFrom(ExecutionUnit original, boolean forParallelExecution) {
// Clone operators
Map<String, Operator> clonedOperatorsByName = new HashMap<String, Operator>();
for (Operator originalChild : original.operators) {
Operator clonedOperator =
originalChild.cloneOperator(originalChild.getName(), forParallelExecution);
addOperator(clonedOperator, !forParallelExecution);
clonedOperatorsByName.put(originalChild.getName(), clonedOperator);
}
// Restore connections
cloneConnections(original.getInnerSources(), original, clonedOperatorsByName);
for (Operator op : original.operators) {
cloneConnections(op.getOutputPorts(), original, clonedOperatorsByName);
}
// Unlock
original.getInnerSources().unlockPortExtenders();
original.getInnerSinks().unlockPortExtenders();
for (Operator op : this.operators) {
op.getInputPorts().unlockPortExtenders();
op.getOutputPorts().unlockPortExtenders();
}
// Other:
this.expanded = original.expanded;
}