long getMaxPulledMessageSequence(final String subject, final String group) { actionCheckpointGuard.lock(); try { final ConsumerGroupProgress progress = actionCheckpoint.getProgresses().get(subject, group); if (progress == null) { return -1; } return progress.getPull(); } finally { actionCheckpointGuard.unlock(); } }
private long getLastMaxSequence(final String subject, final String group) { final ConsumerGroupProgress progress = storage.getConsumerGroupProgress(subject, group); if (progress == null) { return -1; } else { return progress.getPull(); } }
private long computeAckLag(final ConsumerGroupProgress progress) { if (progress == null) { return 0; } final Map<String, ConsumerProgress> consumers = progress.getConsumers(); if (consumers == null || consumers.isEmpty()) { return progress.getPull(); } long totalAckLag = 0; for (final ConsumerProgress consumer : consumers.values()) { // TODO(keli.wang): check if pull - ack is the right lag final long ackLag = consumer.getPull() - consumer.getAck(); totalAckLag += ackLag; } return totalAckLag; } }
@Override public byte[] toBytes(final ActionCheckpoint state) { final StringBuilder data = new StringBuilder(); data.append(VERSION_V3).append(NEWLINE); data.append(state.getOffset()).append(NEWLINE); final Table<String, String, ConsumerGroupProgress> progresses = state.getProgresses(); for (final String subject : progresses.rowKeySet()) { final Map<String, ConsumerGroupProgress> groups = progresses.row(subject); data.append(SLASH_JOINER.join(subject, groups.size())).append(NEWLINE); for (final String group : groups.keySet()) { final ConsumerGroupProgress progress = groups.get(group); final Map<String, ConsumerProgress> consumers = progress.getConsumers(); final int consumerCount = consumers == null ? 0 : consumers.size(); data.append(SLASH_JOINER.join(group, boolean2Short(progress.isBroadcast()), progress.getPull(), consumerCount)).append(NEWLINE); if (consumerCount <= 0) { continue; } consumers.values().forEach(consumer -> { data.append(SLASH_JOINER.join(consumer.getConsumerId(), consumer.getPull(), consumer.getAck())).append(NEWLINE); }); } } return data.toString().getBytes(Charsets.UTF_8); }
private ActionCheckpoint duplicateActionCheckpoint() { actionCheckpointGuard.lock(); try { final Table<String, String, ConsumerGroupProgress> progresses = HashBasedTable.create(); for (final ConsumerGroupProgress progress : actionCheckpoint.getProgresses().values()) { final Map<String, ConsumerProgress> consumers = progress.getConsumers(); if (consumers == null) { continue; } final Map<String, ConsumerProgress> consumersCopy = new HashMap<>(); for (final ConsumerProgress consumer : consumers.values()) { consumersCopy.put(consumer.getConsumerId(), new ConsumerProgress(consumer)); } final String subject = progress.getSubject(); final String group = progress.getGroup(); progresses.put(subject, group, new ConsumerGroupProgress(subject, group, progress.isBroadcast(), progress.getPull(), consumersCopy)); } final long offset = actionCheckpoint.getOffset(); return new ActionCheckpoint(offset, progresses); } finally { actionCheckpointGuard.unlock(); } }
private void fixActionCheckpoint(PullLogManager manager) { final Table<String, String, PullLog> allLogs = manager.getLogs(); final Table<String, String, ConsumerGroupProgress> progresses = actionCheckpoint.getProgresses(); progresses.values().forEach(progress -> { final String subject = progress.getSubject(); final String group = progress.getGroup(); final String groupAndSubject = GroupAndSubject.groupAndSubject(subject, group); final Map<String, ConsumerProgress> consumers = progress.getConsumers(); final Map<String, PullLog> logs = allLogs.column(groupAndSubject); logs.forEach((consumerId, log) -> { final long pull = log.getMaxOffset() - 1; final ConsumerProgress consumer = consumers.get(consumerId); if (consumer != null) { consumer.setPull(pull); } else { consumers.put(consumerId, new ConsumerProgress(subject, group, consumerId, pull, -1)); } }); if (consumers.size() == 1) { consumers.values().forEach(consumer -> { if (consumer.getPull() < 0) { progress.setBroadcast(true); consumer.setPull(progress.getPull()); } }); } }); }