org.eclipse.xtext.ui.editor.model

Class XtextDocument.XtextDocumentLocker

java.lang.Object

org.eclipse.xtext.ui.editor.model.XtextDocument.XtextDocumentLocker

All Implemented Interfaces:

IXtextDocumentContentObserver.Processor

Enclosing class:

XtextDocument

protected class XtextDocument.XtextDocumentLocker
extends Object
implements IXtextDocumentContentObserver.Processor

Author:

Sven Efftinge - Initial contribution and API

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	XtextDocument.XtextDocumentLocker()

Method Summary

Methods

Modifier and Type	Method and Description
protected int	getReadHoldCount() Queries the number of reentrant read holds on this lock by the current thread.
protected XtextResource	getState()
protected int	getWriteHoldCount() Queries the number of reentrant write holds on this lock by the current thread.
protected <T> T	internalReadOnly(IUnitOfWork<T,XtextResource> work, boolean isCancelReaders)
<T> T	modify(IUnitOfWork<T,XtextResource> work)
<T> T	priorityReadOnly(IUnitOfWork<T,XtextResource> work)
<T> T	process(IUnitOfWork<T,XtextResource> transaction) Upgrades a read transaction to a write transaction, executes the work then downgrades to a read transaction again.
<T> T	readOnly(IUnitOfWork<T,XtextResource> work)

Methods inherited from class java.lang.Object

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

Constructor Detail

XtextDocument.XtextDocumentLocker

protected XtextDocument.XtextDocumentLocker()

Method Detail

process

public <T> T process(IUnitOfWork<T,XtextResource> transaction)

Upgrades a read transaction to a write transaction, executes the work then downgrades to a read transaction again.

Specified by:

process in interface IXtextDocumentContentObserver.Processor

Since:

2.7

getWriteHoldCount

protected int getWriteHoldCount()

Queries the number of reentrant write holds on this lock by the current thread. Delegates to ReentrantReadWriteLock.getWriteHoldCount().

Returns:

the number of holds on the write lock by the current thread, or zero if the write lock is not held by the current thread

Since:

2.7

getReadHoldCount

protected int getReadHoldCount()

Queries the number of reentrant read holds on this lock by the current thread. A reader thread has a hold on a lock for each lock action that is not matched by an unlock action. That functionality is implemented in ReentrantReadWriteLock as well, but not before version 1.6. This is why we have to find our own way to work around it.

Returns:

the number of holds on the read lock by the current thread, or zero if the read lock is not held by the current thread

Since:

2.7

getState

protected XtextResource getState()

modify

public <T> T modify(IUnitOfWork<T,XtextResource> work)

priorityReadOnly

public <T> T priorityReadOnly(IUnitOfWork<T,XtextResource> work)

Since:

2.7

readOnly

public <T> T readOnly(IUnitOfWork<T,XtextResource> work)

Since:

2.4

internalReadOnly

protected <T> T internalReadOnly(IUnitOfWork<T,XtextResource> work,
                     boolean isCancelReaders)

Since:

2.7