Package org.apache.activemq.filter

Class DestinationMap

java.lang.Object

org.apache.activemq.filter.DestinationMap

Direct Known Subclasses:

RedeliveryPolicyMap

public class DestinationMap
extends Object

A Map-like data structure allowing values to be indexed by ActiveMQDestination and retrieved by destination - supporting both * and > style of wildcard as well as composite destinations.
This class assumes that the index changes rarely but that fast lookup into the index is required. So this class maintains a pre-calculated index for destination steps. So looking up the values for "TEST.*" or "*.TEST" will be pretty fast.
Looking up of a value could return a single value or a List of matching values if a wildcard or composite destination is used.

Field Summary

Fields

Modifier and Type	Field	Description
protected static String	ANY_CHILD
protected static String	ANY_DESCENDENT

Constructor Summary

Constructors

Constructor	Description
DestinationMap()

Method Summary

Modifier and Type	Method	Description
DestinationMapEntry	chooseValue(ActiveMQDestination destination)	Returns the value which matches the given destination or null if there is no matching value.
protected Set	findWildcardMatches(ActiveMQDestination key)
protected Set	findWildcardMatches(ActiveMQDestination key, boolean deep)
Set	get(ActiveMQDestination key)	Looks up the value(s) matching the given Destination key.
protected Class<? extends DestinationMapEntry>	getEntryClass()	Returns the type of the allowed entries which can be set via the setEntries(List) method.
int	getQueueRootChildCount()
DestinationMapNode	getQueueRootNode()
protected DestinationMapNode	getRootNode(ActiveMQDestination key)	Returns the root node for the given destination type
DestinationMapNode	getTempQueueRootNode()
DestinationMapNode	getTempTopicRootNode()
int	getTopicRootChildCount()
DestinationMapNode	getTopicRootNode()
boolean	isEmpty()
void	put(ActiveMQDestination key, Object value)
void	remove(ActiveMQDestination key, Object value)	Removes the value from the associated destination
Set	removeAll(ActiveMQDestination key)
void	reset()
protected void	setEntries(List<DestinationMapEntry> entries)	A helper method to allow the destination map to be populated from a dependency injection framework such as Spring
static Set	union(Set existing, Set candidates)
Set	unsynchronizedGet(ActiveMQDestination key)
void	unsynchronizedPut(ActiveMQDestination key, Object value)
void	unsynchronizedRemove(ActiveMQDestination key, Object value)

Methods inherited from class java.lang.Object

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

Field Detail

ANY_DESCENDENT

protected static final String ANY_DESCENDENT

See Also:

Constant Field Values

ANY_CHILD

protected static final String ANY_CHILD

See Also:

Constant Field Values

Constructor Detail

DestinationMap

public DestinationMap()

Method Detail

get

public Set get(ActiveMQDestination key)

Looks up the value(s) matching the given Destination key. For simple destinations this is typically a List of one single value, for wildcards or composite destinations this will typically be a List of matching values.

Parameters:

key - the destination to lookup

Returns:

a List of matching values or an empty list if there are no matching values.

unsynchronizedGet

public Set unsynchronizedGet(ActiveMQDestination key)

put

public void put(ActiveMQDestination key,
                Object value)

unsynchronizedPut

public void unsynchronizedPut(ActiveMQDestination key,
                              Object value)

remove

public void remove(ActiveMQDestination key,
                   Object value)

Removes the value from the associated destination

unsynchronizedRemove

public void unsynchronizedRemove(ActiveMQDestination key,
                                 Object value)

getTopicRootChildCount

public int getTopicRootChildCount()

getQueueRootChildCount

public int getQueueRootChildCount()

getQueueRootNode

public DestinationMapNode getQueueRootNode()

getTopicRootNode

public DestinationMapNode getTopicRootNode()

getTempQueueRootNode

public DestinationMapNode getTempQueueRootNode()

getTempTopicRootNode

public DestinationMapNode getTempTopicRootNode()

setEntries

protected void setEntries(List<DestinationMapEntry> entries)

A helper method to allow the destination map to be populated from a dependency injection framework such as Spring

getEntryClass

protected Class<? extends DestinationMapEntry> getEntryClass()

Returns the type of the allowed entries which can be set via the setEntries(List) method. This allows derived classes to further restrict the type of allowed entries to make a type safe destination map for custom policies.

findWildcardMatches

protected Set findWildcardMatches(ActiveMQDestination key)

findWildcardMatches

protected Set findWildcardMatches(ActiveMQDestination key,
                                  boolean deep)

removeAll

public Set removeAll(ActiveMQDestination key)

Parameters:

key -

Returns:

chooseValue

public DestinationMapEntry chooseValue(ActiveMQDestination destination)

Returns the value which matches the given destination or null if there is no matching value. If there are multiple values, the results are sorted and the last item (the biggest) is returned.

Parameters:

destination - the destination to find the value for

Returns:

the largest matching value or null if no value matches

getRootNode

protected DestinationMapNode getRootNode(ActiveMQDestination key)

Returns the root node for the given destination type

reset

public void reset()

isEmpty

public boolean isEmpty()

union

public static Set union(Set existing,
                        Set candidates)