Package org.apache.storm.assignments
Interface ILocalAssignmentsBackend
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- All Superinterfaces:
AutoCloseable
- All Known Implementing Classes:
InMemoryAssignmentBackend
public interface ILocalAssignmentsBackend extends AutoCloseable
Interface for storing local assignments.
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description List<String>assignments()List all the storm runtime ids of local assignments.Map<String,Assignment>assignmentsInfo()Get all the local assignments of local state.voidclearStateForStorm(String stormId)Clear all the state for a storm.voidclose()Function to release resource.voiddeleteStormId(String stormName)Delete a local cache of stormId which is mapped to a specific storm name.AssignmentgetAssignment(String stormId)Get assignment asAssignmentfor a storm.StringgetStormId(String stormName)Get storm runtime id from local.booleanisSynchronized()Decide if the assignments is synchronized from remote state-store.voidkeepOrUpdateAssignment(String stormId, Assignment assignment)Keep a storm assignment to local state or update old assignment.voidkeepStormId(String stormName, String stormId)Keep a mapping storm-name -> storm-id to local state.voidprepare(Map conf)Initial function for creating backend.voidremoveAssignment(String stormId)voidsetSynchronized()Mark this backend as synchronized when sync work is done.voidsyncRemoteAssignments(Map<String,byte[]> remote)Sync remote assignments to local, if remote is null, we will sync it from zk.voidsyncRemoteIds(Map<String,String> remote)Sync remote storm ids to local, will just used for nimbus.
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Method Detail
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isSynchronized
boolean isSynchronized()
Decide if the assignments is synchronized from remote state-store.
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setSynchronized
void setSynchronized()
Mark this backend as synchronized when sync work is done.
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prepare
void prepare(Map conf)
Initial function for creating backend.- Parameters:
conf- config
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keepOrUpdateAssignment
void keepOrUpdateAssignment(String stormId, Assignment assignment)
Keep a storm assignment to local state or update old assignment.- Parameters:
stormId- storm runtime idassignment- assignment as thrift
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getAssignment
Assignment getAssignment(String stormId)
Get assignment asAssignmentfor a storm.- Parameters:
stormId- storm runtime id- Returns:
- assignment
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removeAssignment
void removeAssignment(String stormId)
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assignments
List<String> assignments()
List all the storm runtime ids of local assignments.- Returns:
- a list of storm ids
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assignmentsInfo
Map<String,Assignment> assignmentsInfo()
Get all the local assignments of local state.- Returns:
- mapping of storm-id -> assignment
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syncRemoteAssignments
void syncRemoteAssignments(Map<String,byte[]> remote)
Sync remote assignments to local, if remote is null, we will sync it from zk.- Parameters:
remote- specific remote assignments, if it is null, it will sync from zookeeper[only used for nimbus]
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keepStormId
void keepStormId(String stormName, String stormId)
Keep a mapping storm-name -> storm-id to local state.- Parameters:
stormName- storm namestormId- storm runtime id
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getStormId
String getStormId(String stormName)
Get storm runtime id from local.- Parameters:
stormName- name of a storm- Returns:
- runtime storm id
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syncRemoteIds
void syncRemoteIds(Map<String,String> remote)
Sync remote storm ids to local, will just used for nimbus.- Parameters:
remote- remote ids from state store
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deleteStormId
void deleteStormId(String stormName)
Delete a local cache of stormId which is mapped to a specific storm name.- Parameters:
stormName- storm name
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clearStateForStorm
void clearStateForStorm(String stormId)
Clear all the state for a storm.- Parameters:
stormId- storm id
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close
void close()
Function to release resource.- Specified by:
closein interfaceAutoCloseable
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