How to use

getStartEventID

method

in

org.apache.flink.cep.nfa.ComputationState

/**
 * Prunes matches/partial matches based on the chosen strategy.
 *
 * @param matchesToPrune current partial matches
 * @param matchedResult  already completed matches
 * @param sharedBufferAccessor   accessor to corresponding shared buffer
 * @throws Exception thrown if could not access the state
 */
public void prune(
    Collection<ComputationState> matchesToPrune,
    Collection<Map<String, List<EventId>>> matchedResult,
    SharedBufferAccessor<?> sharedBufferAccessor) throws Exception {
  EventId pruningId = getPruningId(matchedResult);
  if (pruningId != null) {
    List<ComputationState> discardStates = new ArrayList<>();
    for (ComputationState computationState : matchesToPrune) {
      if (computationState.getStartEventID() != null &&
        shouldPrune(computationState.getStartEventID(), pruningId)) {
        sharedBufferAccessor.releaseNode(computationState.getPreviousBufferEntry());
        discardStates.add(computationState);
      }
    }
    matchesToPrune.removeAll(discardStates);
  }
}

nfaState.getPartialMatches().removeIf(pm -> pm.getStartEventID() != null && !partialMatches.contains(pm));

private void serializeSingleComputationState(
    ComputationState computationState,
    DataOutputView target) throws IOException {
  StringValue.writeString(computationState.getCurrentStateName(), target);
  nodeIdSerializer.serialize(computationState.getPreviousBufferEntry(), target);
  versionSerializer.serialize(computationState.getVersion(), target);
  target.writeLong(computationState.getStartTimestamp());
  serializeStartEvent(computationState.getStartEventID(), target);
}

    version,
    computationState.getStartTimestamp(),
    computationState.getStartEventID()
  );
} else {
  startTimestamp = computationState.getStartTimestamp();
  startEventId = computationState.getStartEventID();

/**
 * Prunes matches/partial matches based on the chosen strategy.
 *
 * @param matchesToPrune current partial matches
 * @param matchedResult  already completed matches
 * @param sharedBufferAccessor   accessor to corresponding shared buffer
 * @throws Exception thrown if could not access the state
 */
public void prune(
    Collection<ComputationState> matchesToPrune,
    Collection<Map<String, List<EventId>>> matchedResult,
    SharedBufferAccessor<?> sharedBufferAccessor) throws Exception {
  EventId pruningId = getPruningId(matchedResult);
  if (pruningId != null) {
    List<ComputationState> discardStates = new ArrayList<>();
    for (ComputationState computationState : matchesToPrune) {
      if (computationState.getStartEventID() != null &&
        shouldPrune(computationState.getStartEventID(), pruningId)) {
        sharedBufferAccessor.releaseNode(computationState.getPreviousBufferEntry());
        discardStates.add(computationState);
      }
    }
    matchesToPrune.removeAll(discardStates);
  }
}

/**
 * Prunes matches/partial matches based on the chosen strategy.
 *
 * @param matchesToPrune current partial matches
 * @param matchedResult  already completed matches
 * @param sharedBufferAccessor   accessor to corresponding shared buffer
 * @throws Exception thrown if could not access the state
 */
public void prune(
    Collection<ComputationState> matchesToPrune,
    Collection<Map<String, List<EventId>>> matchedResult,
    SharedBufferAccessor<?> sharedBufferAccessor) throws Exception {
  EventId pruningId = getPruningId(matchedResult);
  if (pruningId != null) {
    List<ComputationState> discardStates = new ArrayList<>();
    for (ComputationState computationState : matchesToPrune) {
      if (computationState.getStartEventID() != null &&
        shouldPrune(computationState.getStartEventID(), pruningId)) {
        sharedBufferAccessor.releaseNode(computationState.getPreviousBufferEntry());
        discardStates.add(computationState);
      }
    }
    matchesToPrune.removeAll(discardStates);
  }
}

private void serializeComputationStates(Queue<ComputationState> states, DataOutputView target) throws IOException {
  target.writeInt(states.size());
  for (ComputationState computationState : states) {
    STATE_NAME_SERIALIZER.serialize(computationState.getCurrentStateName(), target);
    NODE_ID_SERIALIZER.serialize(computationState.getPreviousBufferEntry(), target);
    VERSION_SERIALIZER.serialize(computationState.getVersion(), target);
    TIMESTAMP_SERIALIZER.serialize(computationState.getStartTimestamp(), target);
    if (computationState.getStartEventID() != null) {
      target.writeByte(1);
      EVENT_ID_SERIALIZER.serialize(computationState.getStartEventID(), target);
    } else {
      target.writeByte(0);
    }
  }
}

private void serializeComputationStates(Queue<ComputationState> states, DataOutputView target) throws IOException {
  target.writeInt(states.size());
  for (ComputationState computationState : states) {
    STATE_NAME_SERIALIZER.serialize(computationState.getCurrentStateName(), target);
    NODE_ID_SERIALIZER.serialize(computationState.getPreviousBufferEntry(), target);
    VERSION_SERIALIZER.serialize(computationState.getVersion(), target);
    TIMESTAMP_SERIALIZER.serialize(computationState.getStartTimestamp(), target);
    if (computationState.getStartEventID() != null) {
      target.writeByte(1);
      EVENT_ID_SERIALIZER.serialize(computationState.getStartEventID(), target);
    } else {
      target.writeByte(0);
    }
  }
}

nfaState.getPartialMatches().removeIf(pm -> pm.getStartEventID() != null && !partialMatches.contains(pm));

nfaState.getPartialMatches().removeIf(pm -> pm.getStartEventID() != null && !partialMatches.contains(pm));

    version,
    computationState.getStartTimestamp(),
    computationState.getStartEventID()
  );
} else {
  startTimestamp = computationState.getStartTimestamp();
  startEventId = computationState.getStartEventID();

    version,
    computationState.getStartTimestamp(),
    computationState.getStartEventID()
  );
} else {
  startTimestamp = computationState.getStartTimestamp();
  startEventId = computationState.getStartEventID();