Package nosql.batch.update

Class BatchUpdater<LOCKS,UPDATES,L extends Lock,BATCH_ID>

java.lang.Object

nosql.batch.update.BatchUpdater<LOCKS,UPDATES,L,BATCH_ID>

Type Parameters:

LOCKS -

UPDATES -

L -

BATCH_ID -

public class BatchUpdater<LOCKS,UPDATES,L extends Lock,BATCH_ID>
extends Object

Used to run batch updates on NoSql storage. Initially it was developed for Aerospike but may be implemented for any. Updates should be idempotent so WriteAheadLogCompleter can safely complete interrupted batch There is 2 approaches in batch updates PRE_LOCK and POST_LOCK PRE_LOCK - used if you know in advance all records (keys) that should be updated It takes the following steps to complete batch update 1) Lock keys 2) Apply updates 3) Unlock keys POST_LOCK - used if you don't know in advance all records (keys) that should be updated. It takes the following steps to complete batch update 1) Prepare updates 2) Lock keys 3) Check expected values (to guarantee that no concurrent changes while running updates and acquiring locks) 4) Apply updates 5) Unlock keys

Constructor Summary

Constructors

Constructor	Description
BatchUpdater(BatchOperations<LOCKS,UPDATES,L,BATCH_ID> batchOperations)

Method Summary

Modifier and Type	Method	Description
void	update(BatchUpdate<LOCKS,UPDATES> batchUpdate)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

BatchUpdater

public BatchUpdater(BatchOperations<LOCKS,UPDATES,L,BATCH_ID> batchOperations)

Method Details

update

public void update(BatchUpdate<LOCKS,UPDATES> batchUpdate)