Package org.eclipse.jetty.servlets

Class DoSFilter.RateTracker

java.lang.Object

org.eclipse.jetty.servlets.DoSFilter.RateTracker

All Implemented Interfaces:

java.io.Serializable, java.lang.Runnable

Direct Known Subclasses:

DoSFilter.FixedRateTracker

Enclosing class:

DoSFilter

static class DoSFilter.RateTracker
extends java.lang.Object
implements java.lang.Runnable, java.io.Serializable

A RateTracker is associated with a connection, and stores request rate data.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
class	DoSFilter.RateTracker.Overage

Field Summary

Fields

Modifier and Type	Field	Description
protected javax.servlet.ServletContext	_context
protected java.lang.String	_filterName
protected java.lang.String	_id
protected int	_maxRequestsPerSecond
protected int	_next
protected long[]	_timestamps
private static long	serialVersionUID

Constructor Summary

Constructors

Constructor	Description
RateTracker(javax.servlet.ServletContext context, java.lang.String filterName, java.lang.String id, int maxRequestsPerSecond)

Method Summary

Modifier and Type	Method	Description
private void	addToRateTrackers(DoSFilter filter, DoSFilter.RateTracker tracker)
java.lang.String	getId()
DoSFilter.OverLimit	isRateExceeded(long now)
protected void	removeFromRateTrackers(DoSFilter filter, java.lang.String id)
void	run()
void	setContext(javax.servlet.ServletContext context)
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

_filterName

protected final java.lang.String _filterName

_context

protected transient javax.servlet.ServletContext _context

_id

protected final java.lang.String _id

_maxRequestsPerSecond

protected final int _maxRequestsPerSecond

_timestamps

protected final long[] _timestamps

_next

protected int _next

Constructor Detail

RateTracker

RateTracker(javax.servlet.ServletContext context,
            java.lang.String filterName,
            java.lang.String id,
            int maxRequestsPerSecond)

Method Detail

isRateExceeded

public DoSFilter.OverLimit isRateExceeded(long now)

Parameters:

now - the time now (in nanoseconds) used to calculate elapsed time since previous requests.

Returns:

the current calculated request rate over the last second if rate exceeded, else null.

getId

public java.lang.String getId()

setContext

public void setContext(javax.servlet.ServletContext context)

removeFromRateTrackers

protected void removeFromRateTrackers(DoSFilter filter,
                                      java.lang.String id)

addToRateTrackers

private void addToRateTrackers(DoSFilter filter,
                               DoSFilter.RateTracker tracker)

run

public void run()

Specified by:

run in interface java.lang.Runnable

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object