org.lsst.ccs.localdb.statusdb

Class BatchPersister<T>

java.lang.Object

org.lsst.ccs.localdb.statusdb.BatchPersister<T>

All Implemented Interfaces:

Runnable, org.lsst.ccs.framework.HasLifecycle

Direct Known Subclasses:

MetaDataPersister, StatDataPersister, StatusDataPersister, StatusPersister

public abstract class BatchPersister<T>
extends Object
implements Runnable, org.lsst.ccs.framework.HasLifecycle

Persists entities as a batch.

Author:

LSST CCS Team

Field Summary

Fields

Modifier and Type	Field and Description
protected org.lsst.ccs.services.alert.AlertService	alertService
protected org.lsst.ccs.utilities.logging.Logger	log

Constructor Summary

Constructors

Constructor and Description
BatchPersister(int nMax, boolean flushAtCommit) Constructor for a batch persister.
BatchPersister(int nMax, boolean flushAtCommit, int threads) Constructor for a batch persister.
BatchPersister(int nMax, boolean flushAtCommit, int threads, int threadQueueSize) Constructor for a batch persister.

Method Summary

Modifier and Type	Method and Description
void	addToQueue(T obj)
void	init()
static ExecutorService	newFixedThreadPoolBoundedQueue(int nThreads, int nQueue)
abstract void	persist(T obj, org.hibernate.Session sess) Called from inside an open transaction.
void	run()

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.lsst.ccs.framework.HasLifecycle

build, postBuild, postInit, postShutdown, postStart, shutdown, start

Field Detail

log

protected final org.lsst.ccs.utilities.logging.Logger log

alertService

@LookupField(strategy=TREE)
protected org.lsst.ccs.services.alert.AlertService alertService

Constructor Detail

BatchPersister

public BatchPersister(int nMax,
                      boolean flushAtCommit,
                      int threads,
                      int threadQueueSize)

Constructor for a batch persister.

Parameters:

nMax - The maximum number of entities to persist in a single transaction.

flushAtCommit - true if the session that process the batch should be set to FlushMode.COMMIT

threads - database feeding threads

threadQueueSize - The size of the queue; if negative the queue is unbound.

BatchPersister

public BatchPersister(int nMax,
                      boolean flushAtCommit,
                      int threads)

Constructor for a batch persister.

Parameters:

nMax - The maximum number of entities to persist in a single transaction.

flushAtCommit - true if the session that process the batch should be set to FlushMode.COMMIT

threads - database feeding threads

BatchPersister

public BatchPersister(int nMax,
                      boolean flushAtCommit)

Constructor for a batch persister.

Parameters:

nMax - The maximum number of entities to persist in a single transaction.

flushAtCommit - true if the session that process the batch should be set to FlushMode.COMMIT

Method Detail

newFixedThreadPoolBoundedQueue

public static ExecutorService newFixedThreadPoolBoundedQueue(int nThreads,
                                                             int nQueue)

init

public void init()

Specified by:

init in interface org.lsst.ccs.framework.HasLifecycle

run

public void run()

Specified by:

run in interface Runnable

addToQueue

public void addToQueue(T obj)

persist

public abstract void persist(T obj,
                             org.hibernate.Session sess)

Called from inside an open transaction.

Parameters:

obj -

sess -