org.apache.activemq.broker.region.policy
Class FixedSizedSubscriptionRecoveryPolicy

java.lang.Object
  org.apache.activemq.broker.region.policy.FixedSizedSubscriptionRecoveryPolicy

All Implemented Interfaces:

SubscriptionRecoveryPolicy, Service

public class FixedSizedSubscriptionRecoveryPolicy
extends Object
implements SubscriptionRecoveryPolicy

This implementation of SubscriptionRecoveryPolicy will keep a fixed amount of memory available in RAM for message history which is evicted in time order.

Constructor Summary

FixedSizedSubscriptionRecoveryPolicy()

Method Summary

boolean	add(ConnectionContext context, MessageReference message) A message was sent to the destination.
Message[]	browse(ActiveMQDestination destination)
SubscriptionRecoveryPolicy	copy() Used to copy the policy object.
protected MessageList	createMessageList()
MessageList	getBuffer()
int	getMaximumSize()
boolean	isUseSharedBuffer()
void	recover(ConnectionContext context, Topic topic, SubscriptionRecovery sub) Let a subscription recover message held by the policy.
void	setBroker(Broker broker)
void	setBuffer(MessageList buffer)
void	setMaximumSize(int maximumSize) Sets the maximum amount of RAM in bytes that this buffer can hold in RAM
void	setUseSharedBuffer(boolean useSharedBuffer)
void	start()
void	stop()

Methods inherited from class java.lang.Object

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

Constructor Detail

FixedSizedSubscriptionRecoveryPolicy

public FixedSizedSubscriptionRecoveryPolicy()

Method Detail

copy

public SubscriptionRecoveryPolicy copy()

Description copied from interface: SubscriptionRecoveryPolicy

Used to copy the policy object.

Specified by:

copy in interface SubscriptionRecoveryPolicy

Returns:

the copy

add

public boolean add(ConnectionContext context,
                   MessageReference message)
            throws Exception

Description copied from interface: SubscriptionRecoveryPolicy

A message was sent to the destination.

Specified by:

add in interface SubscriptionRecoveryPolicy

Returns:

true if successful

Throws:

Exception

recover

public void recover(ConnectionContext context,
                    Topic topic,
                    SubscriptionRecovery sub)
             throws Exception

Description copied from interface: SubscriptionRecoveryPolicy

Let a subscription recover message held by the policy.

Specified by:

recover in interface SubscriptionRecoveryPolicy

Throws:

Exception

start

public void start()
           throws Exception

Specified by:

start in interface Service

Throws:

Exception

stop

public void stop()
          throws Exception

Specified by:

stop in interface Service

Throws:

Exception

getBuffer

public MessageList getBuffer()

setBuffer

public void setBuffer(MessageList buffer)

getMaximumSize

public int getMaximumSize()

setMaximumSize

public void setMaximumSize(int maximumSize)

Sets the maximum amount of RAM in bytes that this buffer can hold in RAM

isUseSharedBuffer

public boolean isUseSharedBuffer()

setUseSharedBuffer

public void setUseSharedBuffer(boolean useSharedBuffer)

browse

public Message[] browse(ActiveMQDestination destination)
                 throws Exception

Specified by:

browse in interface SubscriptionRecoveryPolicy

Returns:

messages

Throws:

Exception

setBroker

public void setBroker(Broker broker)

Specified by:

setBroker in interface SubscriptionRecoveryPolicy

createMessageList

protected MessageList createMessageList()