@Override
public Tuple2<Integer, Integer> reduce(
Tuple2<Integer, Integer> value1, Tuple2<Integer, Integer> value2) throws Exception {
state.update(state.value() + 1);
globalCounts.put(value1.f0, state.value());
return new Tuple2<>(value1.f0, value1.f1 + value2.f1);
}
@Override
public void apply(
Integer key, TimeWindow window, Iterable<Integer> values, Collector<Integer> out)
throws Exception {
for (Integer i : values) {
// we need to update this state before emitting elements. Else, the test's main
// thread will have received all output elements before the state is updated and
// the checks may fail
state.update(state.value() + 1);
globalCounts.put(key, state.value());
out.collect(i);
}
}
@Override
public TriggerResult onElement(Object element, long timestamp, W window, TriggerContext ctx)
throws Exception {
OperatorState<Boolean> first = ctx.getKeyValueState("first", true);
if (first.value()) {
long start = timestamp - (timestamp % interval);
long nextFireTimestamp = start + interval;
ctx.registerEventTimeTimer(nextFireTimestamp);
first.update(false);
return TriggerResult.CONTINUE;
}
return TriggerResult.CONTINUE;
}
@Override
public void run(SourceContext<String> ctx) throws Exception {
final Object lockingObject = ctx.getCheckpointLock();
while (isRunning && index.value() < numElements) {
char first = (char) ((index.value() % 40) + 40);
stringBuilder.setLength(0);
stringBuilder.append(first);
String result = randomString(stringBuilder, rnd);
synchronized (lockingObject) {
index.update(index.value() + step);
ctx.collect(result);
}
}
}
@Override
public PrefixCount map(String value) throws IOException {
count.update(count.value() + 1);
return new PrefixCount(value.substring(0, 1), value, 1L);
}
@Override
public PrefixCount map(PrefixCount value) throws Exception {
count.update(count.value() + 1);
return value;
}