org.apache.storm.scheduler.blacklist.strategies

Interface IBlacklistStrategy

All Known Implementing Classes:

DefaultBlacklistStrategy, RasBlacklistStrategy

public interface IBlacklistStrategy

Method Summary

Modifier and Type	Method and Description
Set<String>	getBlacklist(List<Map<String,Set<Integer>>> badSupervisorsToleranceSlidingWindow, Cluster cluster, Topologies topologies) Get blacklist by blacklist strategy.
void	prepare(Map<String,Object> conf)
void	resumeFromBlacklist() resume supervisors form blacklist.

Method Detail

prepare

void prepare(Map<String,Object> conf)

getBlacklist

Set<String> getBlacklist(List<Map<String,Set<Integer>>> badSupervisorsToleranceSlidingWindow,
                         Cluster cluster,
                         Topologies topologies)

Get blacklist by blacklist strategy.

Parameters:

badSupervisorsToleranceSlidingWindow - bad supervisors buffered in sliding window

cluster - the cluster these topologies are running in. cluster contains everything user need to develop a new scheduling logic. e.g. supervisors information, available slots, current assignments for all the topologies etc. User can set the new assignment for topologies using cluster.setAssignmentById()`

topologies - all the topologies in the cluster, some of them need schedule. Topologies object here only contain static information about topologies. Information like assignments, slots are all in the cluster object.

Returns:

blacklisted supervisors’ id set

resumeFromBlacklist

void resumeFromBlacklist()

resume supervisors form blacklist. Blacklist is just a temporary list for supervisors, or there will be less and less available resources. This will be called every time before getBlacklist() and schedule.