org.apache.jackrabbit.oak.plugins.observation

Class CommitRateLimiter

java.lang.Object

org.apache.jackrabbit.oak.plugins.observation.CommitRateLimiter

All Implemented Interfaces:

CommitHook

public class CommitRateLimiter
extends Object
implements CommitHook

This CommitHook can be used to block or delay commits for any length of time. As long as commits are blocked this hook throws a CommitFailedException.

Constructor Summary

Constructors

Constructor and Description
CommitRateLimiter()

Method Summary

Modifier and Type	Method and Description
void	afterNonBlocking() The current thread finished running code that must not be throttled or blocked.
void	beforeNonBlocking() The current thread will now run code that must not be throttled or blocked, such as processing events (EventListener.onEvent is going to be called).
void	blockCommit()
void	blockCommits() Block any further commits until unblockCommits() is called.
protected void	delay()
boolean	getBlockCommits()
boolean	isThreadBlocking() Check whether the current thread is non-blocking.
NodeState	processCommit(NodeState before, NodeState after, CommitInfo info) Validates and/or modifies the given content change before it gets persisted.
void	setDelay(long delay) Number of milliseconds to delay commits going through this hook.
void	unblockCommits() Unblock blocked commits.

Methods inherited from class java.lang.Object

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

Constructor Detail

CommitRateLimiter

public CommitRateLimiter()

Method Detail

blockCommits

public void blockCommits()

Block any further commits until unblockCommits() is called.

unblockCommits

public void unblockCommits()

Unblock blocked commits.

getBlockCommits

public boolean getBlockCommits()

setDelay

public void setDelay(long delay)

Number of milliseconds to delay commits going through this hook. If 0, any currently blocked commit will be unblocked.

Parameters:

delay - milliseconds

processCommit

@Nonnull
public NodeState processCommit(NodeState before,
                                         NodeState after,
                                         CommitInfo info)
                                  throws CommitFailedException

Description copied from interface: CommitHook

Validates and/or modifies the given content change before it gets persisted.

Specified by:

processCommit in interface CommitHook

Parameters:

before - content tree before the commit

after - content tree prepared for the commit

info - metadata associated with this commit

Returns:

content tree to be committed

Throws:

CommitFailedException - if the commit should be rejected

blockCommit

public void blockCommit()
                 throws CommitFailedException

Throws:

CommitFailedException

delay

protected void delay()
              throws CommitFailedException

Throws:

CommitFailedException

beforeNonBlocking

public void beforeNonBlocking()

The current thread will now run code that must not be throttled or blocked, such as processing events (EventListener.onEvent is going to be called).

afterNonBlocking

public void afterNonBlocking()

The current thread finished running code that must not be throttled or blocked.

isThreadBlocking

public boolean isThreadBlocking()

Check whether the current thread is non-blocking.

Returns:

whether thread thread is non-blocking