com.goldencode.p2j.directory

Class DirectoryService.LockHelper

java.lang.Object

com.goldencode.p2j.directory.DirectoryService.LockHelper

Direct Known Subclasses:

DirectoryService.AttributeAdder, DirectoryService.AttributeGetter, DirectoryService.AttributeRemover, DirectoryService.AttributeSetter, DirectoryService.NodeLocker

Enclosing class:

DirectoryService

abstract class DirectoryService.LockHelper
extends java.lang.Object

Base class for all attribute helper classes.

Field Summary

Fields

Modifier and Type	Field and Description
protected java.lang.Object	lock Intermediate lock
protected java.lang.String	name Attribute name
protected java.lang.String	nodeId Node ID
(package private) Remapper	remapper Reference to remapper

Constructor Summary

Constructors

Constructor and Description
LockHelper(java.lang.String nodeId, java.lang.String name) Construct an instance for specified node ID and attribute name.

Method Summary

Modifier and Type	Method and Description
protected abstract boolean	lock() Perform preliminary steps required to access node and attribute.
protected boolean	pre(boolean batchWr, int lockOp) Lock node.
protected boolean	pre(boolean batchWr, int lockOp, int nodeOp) Lock node and check access rights.
protected boolean	pre(boolean batchWr, int lockOp, int nodeOp, int attrOp) Lock node and check access rights to node and attribute.
(package private) void	release() Perform cleanup.

Methods inherited from class java.lang.Object

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

Field Detail

lock

protected java.lang.Object lock

Intermediate lock

name

protected java.lang.String name

Attribute name

nodeId

protected java.lang.String nodeId

Node ID

remapper

Remapper remapper

Reference to remapper

Constructor Detail

LockHelper

LockHelper(java.lang.String nodeId,
           java.lang.String name)

Construct an instance for specified node ID and attribute name.

Parameters:

nodeId - Node ID for which operation will be performed.

name - Attribute name.

Method Detail

lock

protected abstract boolean lock()

Perform preliminary steps required to access node and attribute.

Returns:

true if preliminary steps were successful.

pre

protected boolean pre(boolean batchWr,
                      int lockOp)

Lock node.

Parameters:

batchWr - Flag for synchBatch().

lockOp - Locking mode for LockManager.

Returns:

true if preliminary steps were successful.

pre

protected boolean pre(boolean batchWr,
                      int lockOp,
                      int nodeOp)

Lock node and check access rights.

Parameters:

batchWr - Flag for synchBatch().

lockOp - Locking mode for LockManager.

nodeOp - Node access mode.

Returns:

true if preliminary steps were successful.

pre

protected boolean pre(boolean batchWr,
                      int lockOp,
                      int nodeOp,
                      int attrOp)

Lock node and check access rights to node and attribute.

Parameters:

batchWr - Flag for synchBatch().

lockOp - Locking mode for LockManager.

nodeOp - Node access mode.

attrOp - Attribute access mode.

Returns:

true if preliminary steps were successful.

release

void release()

Perform cleanup.