August 2017
Beginner to intermediate
284 pages
6h 51m
English
Content preview from Mastering Apache Storm
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Converting component IDs to executors
Now let's make the jump from component IDs to actual executors, as that's the level at which the Storm cluster deals with assignments.
The process is quite straightforward:
- Get a map of executors by component from the cluster
- Check which components' executors need scheduling, according to the cluster
- Create a map of the types to the executors, populating only those executors that are awaiting scheduling:
private Set<ExecutorDetails> getAllAliveExecutors(Cluster cluster, TopologyDetails topologyDetails) { // Get the existing assignment of the current topology as it's live in the cluster SchedulerAssignment existingAssignment = cluster.getAssignmentById(topologyDetails.getId()); // Return alive executors, ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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