net.timewalker.ffmq4.storage.data.impl

Class AbstractDataStore

java.lang.Object

net.timewalker.ffmq4.storage.data.impl.AbstractDataStore

All Implemented Interfaces:

DataStore, LinkedDataStore

Direct Known Subclasses:

AbstractBlockBasedDataStore, InMemoryLinkedDataStore

public abstract class AbstractDataStore
extends Object
implements LinkedDataStore

AbstractDataStore

Field Summary

Fields

Modifier and Type	Field and Description
protected FastBitSet	locks
protected static boolean	SAFE_MODE

Constructor Summary

Constructors

Constructor and Description
AbstractDataStore()

Method Summary

Modifier and Type	Method and Description
protected abstract void	checkHandle(int handle) Check handle validity
boolean	isLocked(int handle) Check if the data associated with a given handle is locked
void	lock(int handle) Lock the data associated to a given handle
void	unlock(int handle) Unlock the data associated to a given handle

Methods inherited from class java.lang.Object

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

Methods inherited from interface net.timewalker.ffmq4.storage.data.LinkedDataStore

delete, first, init, next, previous, replace, retrieve, store

Methods inherited from interface net.timewalker.ffmq4.storage.data.DataStore

close, commitChanges, commitChanges, getAbsoluteStoreUsage, getStoreUsage, size

Field Detail

SAFE_MODE

protected static final boolean SAFE_MODE

locks

protected FastBitSet locks

Constructor Detail

AbstractDataStore

public AbstractDataStore()

Method Detail

checkHandle

protected abstract void checkHandle(int handle)
                             throws DataStoreException

Check handle validity

Parameters:

handle -

Throws:

DataStoreException

isLocked

public final boolean isLocked(int handle)
                       throws DataStoreException

Description copied from interface: LinkedDataStore

Check if the data associated with a given handle is locked

Specified by:

isLocked in interface LinkedDataStore

Throws:

DataStoreException - on storage error or invalid handle

lock

public final void lock(int handle)
                throws DataStoreException

Description copied from interface: LinkedDataStore

Lock the data associated to a given handle

Specified by:

lock in interface LinkedDataStore

Throws:

DataStoreException - on storage error or invalid handle

unlock

public final void unlock(int handle)
                  throws DataStoreException

Description copied from interface: LinkedDataStore

Unlock the data associated to a given handle

Specified by:

unlock in interface LinkedDataStore

Throws:

DataStoreException - on storage error or invalid handle