public void execute()

in storm-client/src/jvm/org/apache/storm/daemon/Acker.java [48:110]
59 lines of code
18 McCabe index (conditional complexity)

    public void execute(Tuple input) {
        if (TupleUtils.isTick(input)) {
            Map<Object, AckObject> tmp = pending.rotate();
            LOG.debug("Number of timeout tuples:{}", tmp.size());
            return;
        }

        boolean resetTimeout = false;
        String streamId = input.getSourceStreamId();
        Object id = input.getValue(0);
        AckObject curr = pending.get(id);
        if (ACKER_INIT_STREAM_ID.equals(streamId)) {
            if (curr == null) {
                curr = new AckObject();
                pending.put(id, curr);
            }
            curr.updateAck(input.getLong(1));
            curr.spoutTask = input.getInteger(2);
        } else if (ACKER_ACK_STREAM_ID.equals(streamId)) {
            if (curr == null) {
                curr = new AckObject();
                pending.put(id, curr);
            }
            curr.updateAck(input.getLong(1));
        } else if (ACKER_FAIL_STREAM_ID.equals(streamId)) {
            // For the case that ack_fail message arrives before ack_init
            if (curr == null) {
                curr = new AckObject();
            }
            curr.failed = true;
            pending.put(id, curr);
        } else if (ACKER_RESET_TIMEOUT_STREAM_ID.equals(streamId)) {
            resetTimeout = true;
            if (curr == null) {
                curr = new AckObject();
            }
            pending.put(id, curr);
        } else if (Constants.SYSTEM_FLUSH_STREAM_ID.equals(streamId)) {
            collector.flush();
            return;
        } else {
            LOG.warn("Unknown source stream {} from task-{}", streamId, input.getSourceTask());
            return;
        }

        int task = curr.spoutTask;
        if (task >= 0 && (curr.val == 0 || curr.failed || resetTimeout)) {
            Values tuple = new Values(id, getTimeDeltaMillis(curr.startTime));
            if (curr.val == 0) {
                pending.remove(id);
                collector.emitDirect(task, ACKER_ACK_STREAM_ID, tuple);
            } else if (curr.failed) {
                pending.remove(id);
                collector.emitDirect(task, ACKER_FAIL_STREAM_ID, tuple);
            } else if (resetTimeout) {
                collector.emitDirect(task, ACKER_RESET_TIMEOUT_STREAM_ID, tuple);
            } else {
                throw new IllegalStateException("The checks are inconsistent we reach what should be unreachable code.");
            }
        }

        collector.ack(input);
    }