org.deegree.feature.persistence.lock
Interface Lock

public interface Lock

Represents a lock of a LockManager.

Version:

$Revision: 20580 $, $Date: 2009-11-04 18:47:14 +0100 (Wed, 04 Nov 2009) $

Author:

Markus Schneider, last edited by: $Author: mschneider $

Method Summary

CloseableIterator<String>	getFailedToLockFeatures() Returns the ids of all features that have been requested to be locked, but which couldn't.
String	getId() Returns the lock identifier.
CloseableIterator<String>	getLockedFeatures() Returns the ids of all locked features.
int	getNumFailedToLock() Returns the number of features that have been requested to be locked, but which couldn't.
int	getNumLocked() Returns the number of locked features.
boolean	isLocked(String fid) Returns whether this Lock involves the specified feature.
void	release() Releases all locked features (invalidates the lock).
void	release(QName ftName, Filter filter) Releases the specified features from the lock.
void	release(String fid) Releases the specified feature from the lock (if it was locked).

Method Detail

getId

String getId()

Returns the lock identifier.

Returns:

the lock identifier

getNumLocked

int getNumLocked()

Returns the number of locked features.

Returns:

the number of locked features

getNumFailedToLock

int getNumFailedToLock()

Returns the number of features that have been requested to be locked, but which couldn't.

Returns:

the number of features that have been requested to be locked, but which couldn't

getLockedFeatures

CloseableIterator<String> getLockedFeatures()
                                            throws FeatureStoreException

Returns the ids of all locked features.

NOTE: The caller must invoke CloseableIterator.close() after it's not needed anymore -- otherwise, backing resources (such as database connections) may not be freed.

Returns:

an iterator for all locked feature ids

Throws:

FeatureStoreException

getFailedToLockFeatures

CloseableIterator<String> getFailedToLockFeatures()
                                                  throws FeatureStoreException

Returns the ids of all features that have been requested to be locked, but which couldn't.

NOTE: The caller must invoke CloseableIterator.close() after it's not needed anymore -- otherwise, backing resources (such as database connections) may not be freed.

Returns:

an iterator for all locked feature ids

Throws:

FeatureStoreException

isLocked

boolean isLocked(String fid)
                 throws FeatureStoreException

Returns whether this Lock involves the specified feature.

Parameters:

fid - id of the feature

Returns:

true, if the feature is involved, false otherwise

Throws:

FeatureStoreException

release

void release()
             throws FeatureStoreException

Releases all locked features (invalidates the lock).

Throws:

FeatureStoreException

release

void release(String fid)
             throws FeatureStoreException

Releases the specified feature from the lock (if it was locked).

Parameters:

fid - id of the feature

Throws:

FeatureStoreException

release

void release(QName ftName,
             Filter filter)
             throws FeatureStoreException

Releases the specified features from the lock.

Parameters:

ftName -

filter -

Throws:

FeatureStoreException