private int setSpoutInfo(
StormTopology oldTopology, StormTopology newTopology, int cnt, StormClusterState clusterState)
throws Exception {
Map<String, SpoutSpec> oldSpouts = oldTopology.get_spouts();
Map<String, SpoutSpec> spouts = newTopology.get_spouts();
for (Entry<String, SpoutSpec> entry : oldSpouts.entrySet()) {
String spoutName = entry.getKey();
SpoutSpec oldSpout = entry.getValue();
SpoutSpec spout = spouts.get(spoutName);
if (oldSpout.get_common().get_parallelism_hint()
> spout.get_common().get_parallelism_hint()) {
int removedTaskNum =
oldSpout.get_common().get_parallelism_hint()
- spout.get_common().get_parallelism_hint();
TreeSet<Integer> taskIds =
new TreeSet<Integer>(clusterState.task_ids_by_componentId(topologyid, spoutName));
Iterator<Integer> descendIterator = taskIds.descendingIterator();
while (--removedTaskNum >= 0) {
int taskId = descendIterator.next();
removeTask(topologyid, taskId, clusterState);
LOG.info("Remove spout task, taskId=" + taskId + " for " + spoutName);
}
} else if (oldSpout.get_common().get_parallelism_hint()
== spout.get_common().get_parallelism_hint()) {
continue;
} else {
int delta =
spout.get_common().get_parallelism_hint()
- oldSpout.get_common().get_parallelism_hint();
Map<Integer, TaskInfo> taskInfoMap = new HashMap<Integer, TaskInfo>();
for (int i = 1; i <= delta; i++) {
cnt++;
TaskInfo taskInfo = new TaskInfo((String) entry.getKey(), "spout");
taskInfoMap.put(cnt, taskInfo);
newTasks.add(cnt);
LOG.info("Setup new spout task, taskId=" + cnt + " for " + spoutName);
}
clusterState.add_task(topologyid, taskInfoMap);
}
}
return cnt;
}
@Override
public <T> Object execute(T... args) {
boolean isSetTaskInfo = false;
try {
Boolean reassign = (Boolean) args[1];
Map<Object, Object> conf = (Map<Object, Object>) args[2]; // args[0]:
// delay,
// args[1]:
// reassign_flag,
// args[2]:
// conf
if (conf != null) {
boolean isConfUpdate = false;
Map stormConf = data.getConf();
// Update topology code
Map topoConf = StormConfig.read_nimbus_topology_conf(stormConf, topologyid);
StormTopology rawOldTopology = StormConfig.read_nimbus_topology_code(stormConf, topologyid);
StormTopology rawNewTopology = NimbusUtils.normalizeTopology(conf, rawOldTopology, true);
StormTopology sysOldTopology = rawOldTopology.deepCopy();
StormTopology sysNewTopology = rawNewTopology.deepCopy();
if (conf.get(Config.TOPOLOGY_ACKER_EXECUTORS) != null) {
Common.add_acker(topoConf, sysOldTopology);
Common.add_acker(conf, sysNewTopology);
int ackerNum = JStormUtils.parseInt(conf.get(Config.TOPOLOGY_ACKER_EXECUTORS));
int oldAckerNum = JStormUtils.parseInt(topoConf.get(Config.TOPOLOGY_ACKER_EXECUTORS));
LOG.info("Update acker from oldAckerNum=" + oldAckerNum + " to ackerNum=" + ackerNum);
topoConf.put(Config.TOPOLOGY_ACKER_EXECUTORS, ackerNum);
isConfUpdate = true;
}
// If scale-out, setup task info for new added tasks
setTaskInfo(sysOldTopology, sysNewTopology);
isSetTaskInfo = true;
// If everything is OK, write topology code into disk
StormConfig.write_nimbus_topology_code(
stormConf, topologyid, Utils.serialize(rawNewTopology));
// Update topology conf if worker num has been updated
Set<Object> keys = conf.keySet();
Integer workerNum = JStormUtils.parseInt(conf.get(Config.TOPOLOGY_WORKERS));
if (workerNum != null) {
Integer oldWorkerNum = JStormUtils.parseInt(topoConf.get(Config.TOPOLOGY_WORKERS));
topoConf.put(Config.TOPOLOGY_WORKERS, workerNum);
isConfUpdate = true;
LOG.info("Update worker num from " + oldWorkerNum + " to " + workerNum);
}
if (keys.contains(Config.ISOLATION_SCHEDULER_MACHINES)) {
topoConf.put(
Config.ISOLATION_SCHEDULER_MACHINES, conf.get(Config.ISOLATION_SCHEDULER_MACHINES));
}
if (isConfUpdate) {
StormConfig.write_nimbus_topology_conf(stormConf, topologyid, topoConf);
}
}
TopologyAssignEvent event = new TopologyAssignEvent();
event.setTopologyId(topologyid);
event.setScratch(true);
event.setOldStatus(oldStatus);
event.setReassign(reassign);
if (conf != null) event.setScaleTopology(true);
TopologyAssign.push(event);
event.waitFinish();
} catch (Exception e) {
LOG.error("do-rebalance error!", e);
// Rollback the changes on ZK
if (isSetTaskInfo) {
try {
StormClusterState clusterState = data.getStormClusterState();
clusterState.remove_task(topologyid, newTasks);
} catch (Exception e1) {
LOG.error("Failed to rollback the changes on ZK for task-" + newTasks, e);
}
}
}
DelayStatusTransitionCallback delayCallback =
new DelayStatusTransitionCallback(
data, topologyid, oldStatus, StatusType.rebalancing, StatusType.done_rebalance);
return delayCallback.execute();
}