@Override
public Trace getTrace() {
TraceBuilder traceBuilder = getTraceBuilder();
if (traceBuilder != null) {
return traceBuilder.build();
} else {
return Trace.single(getShallowTrace(), "none", 0L);
}
}
@Override
public final void contextRun(
final Context context, final Task<?> parent, final Collection<Task<?>> predecessors) {
final TaskLogger taskLogger = context.getTaskLogger();
final TraceBuilder traceBuilder = context.getTraceBuilder();
if (transitionRun(traceBuilder)) {
markTaskStarted();
final Promise<T> promise;
try {
if (parent != null) {
traceBuilder.addRelationship(
Relationship.CHILD_OF, getShallowTraceBuilder(), parent.getShallowTraceBuilder());
}
for (Task<?> predecessor : predecessors) {
traceBuilder.addRelationship(
Relationship.SUCCESSOR_OF,
getShallowTraceBuilder(),
predecessor.getShallowTraceBuilder());
}
taskLogger.logTaskStart(this);
try {
final Context wrapperContext = new WrappedContext(context);
promise = doContextRun(wrapperContext);
} finally {
transitionPending();
}
promise.addListener(
resolvedPromise -> {
if (resolvedPromise.isFailed()) {
fail(resolvedPromise.getError(), taskLogger);
} else {
done(resolvedPromise.get(), taskLogger);
}
});
} catch (Throwable t) {
fail(t, taskLogger);
}
} else {
// this is possible when task was cancelled or has been executed multiple times
// e.g. task has multiple paths it can be executed with or has been completed by
// a FusionTask
if (parent != null) {
traceBuilder.addRelationship(
Relationship.POTENTIAL_CHILD_OF,
getShallowTraceBuilder(),
parent.getShallowTraceBuilder());
}
for (Task<?> predecessor : predecessors) {
traceBuilder.addRelationship(
Relationship.POSSIBLE_SUCCESSOR_OF,
getShallowTraceBuilder(),
predecessor.getShallowTraceBuilder());
}
}
}
protected boolean transitionRun(final TraceBuilder traceBuilder) {
State state;
State newState;
do {
state = _stateRef.get();
if (state.getType() != StateType.INIT) {
return false;
}
newState = state.transitionRun();
} while (!_stateRef.compareAndSet(state, newState));
_traceBuilder = traceBuilder;
traceBuilder.addShallowTrace(_shallowTraceBuilder);
return true;
}