java.lang.Object
- org.apache.catalina.tribes.group.ChannelInterceptorBase
- - org.apache.catalina.tribes.group.GroupChannel

All Implemented Interfaces:

javax.management.MBeanRegistration, Channel, ChannelInterceptor, GroupChannelMBean, Heartbeat, JmxChannel, ManagedChannel, MembershipListener
```
public class GroupChannel
extends ChannelInterceptorBase
implements ManagedChannel, JmxChannel, GroupChannelMBean
```
The default implementation of a Channel.
The GroupChannel manages the replication channel. It coordinates message being sent and received with membership announcements. The channel has an chain of interceptors that can modify the message or perform other logic.
It manages a complete group, both membership and replication.

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`class`	`GroupChannel.HeartbeatRunnable`	Title: Internal heartbeat runnable
`static class`	`GroupChannel.InterceptorIterator`	Title: Interceptor Iterator

Nested classes/interfaces inherited from interface org.apache.catalina.tribes.ChannelInterceptor
ChannelInterceptor.InterceptorEvent

Field Summary

Fields
Modifier and Type	Field	Description
`protected java.util.List<ChannelListener>`	`channelListeners`	A list of channel listeners that subscribe to incoming messages
`protected ChannelCoordinator`	`coordinator`	The `ChannelCoordinator` coordinates the bottom layer components: - MembershipService - ChannelSender - ChannelReceiver
`protected boolean`	`heartbeat`	Flag to determine if the channel manages its own heartbeat If set to true, the channel will start a local thread for the heart beat.
`protected java.util.concurrent.ScheduledFuture<?>`	`heartbeatFuture`	Internal heartbeat future
`protected long`	`heartbeatSleeptime`	If `heartbeat == true` then how often do we want this heartbeat to run.
`protected ChannelInterceptor`	`interceptors`	The first interceptor in the interceptor stack.
`protected java.util.List<MembershipListener>`	`membershipListeners`	A list of membership listeners that subscribe to membership announcements
`protected java.util.concurrent.ScheduledFuture<?>`	`monitorFuture`
`protected java.lang.String`	`name`	the name of this channel.
`protected boolean`	`optionCheck`	If set to true, the GroupChannel will check to make sure that
`protected boolean`	`ownExecutor`
`protected static StringManager`	`sm`
`protected java.util.concurrent.ScheduledExecutorService`	`utilityExecutor`	Executor service.

Fields inherited from class org.apache.catalina.tribes.group.ChannelInterceptorBase
optionFlag

Fields inherited from interface org.apache.catalina.tribes.Channel
DEFAULT, MBR_RX_SEQ, MBR_TX_SEQ, SEND_OPTIONS_ASYNCHRONOUS, SEND_OPTIONS_BYTE_MESSAGE, SEND_OPTIONS_DEFAULT, SEND_OPTIONS_MULTICAST, SEND_OPTIONS_SECURE, SEND_OPTIONS_SYNCHRONIZED_ACK, SEND_OPTIONS_UDP, SEND_OPTIONS_USE_ACK, SND_RX_SEQ, SND_TX_SEQ

Constructor Summary

Constructors
Constructor Description

GroupChannel()
Creates a GroupChannel.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`addChannelListener(ChannelListener channelListener)`	Adds a channel listener to the channel. Channel listeners are uniquely identified using the equals(Object) method
`void`	`addInterceptor(ChannelInterceptor interceptor)`	Adds an interceptor to the stack for message processing Interceptors are ordered in the way they are added. `channel.addInterceptor(A);` `channel.addInterceptor(C);` `channel.addInterceptor(B);` Will result in an interceptor stack like this: `A -> C -> B` The complete stack will look like this: `Channel -> A -> C -> B -> ChannelCoordinator`
`void`	`addMembershipListener(MembershipListener membershipListener)`	Adds a membership listener to the channel. Membership listeners are uniquely identified using the equals(Object) method
`protected void`	`checkOptionFlags()`	Validates the option flags that each interceptor is using and reports an error if two interceptor share the same flag.
`ChannelReceiver`	`getChannelReceiver()`	Returns the channel receiver component
`ChannelSender`	`getChannelSender()`	Returns the channel sender component
`ChannelInterceptor`	`getFirstInterceptor()`	Returns the first interceptor of the stack.
`boolean`	`getHeartbeat()`
`long`	`getHeartbeatSleeptime()`	Returns the sleep time in milliseconds that the internal heartbeat will sleep in between invocations of `Channel.heartbeat()`
`java.util.Iterator<ChannelInterceptor>`	`getInterceptors()`	Returns an iterator of all the interceptors in this stack
`java.lang.String`	`getJmxDomain()`	Return the jmx domain which this channel is registered.
`java.lang.String`	`getJmxPrefix()`	Return the jmx prefix which will be used with channel ObjectName.
`MembershipService`	`getMembershipService()`	Returns the membership service component
`java.lang.String`	`getName()`	Return the name of this channel.
`boolean`	`getOptionCheck()`
`java.util.concurrent.ScheduledExecutorService`	`getUtilityExecutor()`	Return executor that can be used for utility tasks.
`void`	`heartbeat()`	Sends a heartbeat through the interceptor stack. Invoke this method from the application on a periodic basis if you have turned off internal heartbeats `channel.setHeartbeat(false)`
`boolean`	`isJmxEnabled()`	If set to true, this channel is registered with jmx.
`void`	`memberAdded(Member member)`	memberAdded gets invoked by the interceptor below the channel and the channel will broadcast it to the membership listeners
`void`	`memberDisappeared(Member member)`	memberDisappeared gets invoked by the interceptor below the channel and the channel will broadcast it to the membership listeners
`void`	`messageReceived(ChannelMessage msg)`	Callback from the interceptor stack.
`void`	`postDeregister()`
`void`	`postRegister(java.lang.Boolean registrationDone)`
`void`	`preDeregister()`
`javax.management.ObjectName`	`preRegister(javax.management.MBeanServer server, javax.management.ObjectName name)`
`void`	`removeChannelListener(ChannelListener channelListener)`	Removes a channel listener from the channel. Channel listeners are uniquely identified using the equals(Object) method
`void`	`removeMembershipListener(MembershipListener membershipListener)`	Removes a membership listener from the channel. Membership listeners are uniquely identified using the equals(Object) method
`UniqueId`	`send(Member[] destination, java.io.Serializable msg, int options)`	Send a message to the destinations specified
`UniqueId`	`send(Member[] destination, java.io.Serializable msg, int options, ErrorHandler handler)`	Send a message to one or more members in the cluster
`protected void`	`sendNoRpcChannelReply(RpcMessage msg, Member destination)`	Sends a `NoRpcChannelReply` message to a member This method gets invoked by the channel if an RPC message comes in and no channel listener accepts the message.
`void`	`setChannelReceiver(ChannelReceiver clusterReceiver)`	Sets the channel receiver component
`void`	`setChannelSender(ChannelSender clusterSender)`	Sets the channel sender component
`void`	`setHeartbeat(boolean heartbeat)`	Enables or disables local heartbeat.
`void`	`setHeartbeatSleeptime(long heartbeatSleeptime)`	Configure local heartbeat sleep time Only used when `getHeartbeat()==true`
`void`	`setJmxDomain(java.lang.String jmxDomain)`	Set the jmx domain which this channel should be registered.
`void`	`setJmxEnabled(boolean jmxEnabled)`	If set to true, this channel is registered with jmx.
`void`	`setJmxPrefix(java.lang.String jmxPrefix)`	Set the jmx prefix which will be used with channel ObjectName.
`void`	`setMembershipService(MembershipService membershipService)`	Sets the membership component
`void`	`setName(java.lang.String name)`	Set the name of this channel
`void`	`setOptionCheck(boolean optionCheck)`	Enables/disables the option check Setting this to true, will make the GroupChannel perform a conflict check on the interceptors.
`protected void`	`setupDefaultStack()`	Sets up the default implementation interceptor stack if no interceptors have been added
`void`	`setUtilityExecutor(java.util.concurrent.ScheduledExecutorService utilityExecutor)`	Set the executor that can be used for utility tasks.
`void`	`start(int svc)`	Starts the channel.
`protected void`	`startHeartbeat()`
`void`	`stop(int svc)`	Stops the channel.

Methods inherited from class org.apache.catalina.tribes.group.ChannelInterceptorBase
fireInterceptorEvent, getChannel, getLocalMember, getMember, getMembers, getNext, getOptionFlag, getPrevious, hasMembers, okToProcess, sendMessage, setChannel, setNext, setOptionFlag, setPrevious

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.catalina.tribes.Channel
getLocalMember, getMember, getMembers, hasMembers

Methods inherited from interface org.apache.catalina.tribes.group.GroupChannelMBean
getLocalMember, getMembers, hasMembers

- Field Detail
  - sm
```
protected static final StringManager sm
```
  - heartbeat
```
protected boolean heartbeat
```
    Flag to determine if the channel manages its own heartbeat If set to true, the channel will start a local thread for the heart beat.
  - heartbeatSleeptime
```
protected long heartbeatSleeptime
```
    If heartbeat == true then how often do we want this heartbeat to run. The default value is 5000 milliseconds.
  - heartbeatFuture
```
protected java.util.concurrent.ScheduledFuture<?> heartbeatFuture
```
    Internal heartbeat future
  - monitorFuture
```
protected java.util.concurrent.ScheduledFuture<?> monitorFuture
```
  - coordinator
```
protected final ChannelCoordinator coordinator
```
    The ChannelCoordinator coordinates the bottom layer components:
    - MembershipService
    - ChannelSender
    - ChannelReceiver
  - interceptors
```
protected ChannelInterceptor interceptors
```
    The first interceptor in the interceptor stack. The interceptors are chained in a linked list, so we only need a reference to the first one
  - membershipListeners
```
protected final java.util.List<MembershipListener> membershipListeners
```
    A list of membership listeners that subscribe to membership announcements
  - channelListeners
```
protected final java.util.List<ChannelListener> channelListeners
```
    A list of channel listeners that subscribe to incoming messages
  - optionCheck
```
protected boolean optionCheck
```
    If set to true, the GroupChannel will check to make sure that
  - name
```
protected java.lang.String name
```
    the name of this channel.
  - utilityExecutor
```
protected java.util.concurrent.ScheduledExecutorService utilityExecutor
```
    Executor service.
  - ownExecutor
```
protected boolean ownExecutor
```
- Constructor Detail
  - GroupChannel
```
public GroupChannel()
```
    Creates a GroupChannel. This constructor will also add the first interceptor in the GroupChannel.
    The first interceptor is always the channel itself.
- Method Detail
  - addInterceptor
```
public void addInterceptor(ChannelInterceptor interceptor)
```
    Adds an interceptor to the stack for message processing
    Interceptors are ordered in the way they are added.
    channel.addInterceptor(A);
    channel.addInterceptor(C);
    channel.addInterceptor(B);
    Will result in an interceptor stack like this:
    A -> C -> B
    The complete stack will look like this:
    Channel -> A -> C -> B -> ChannelCoordinator
    
    Specified by:
    
    addInterceptor in interface Channel
    
    Parameters:
    
    interceptor - ChannelInterceptorBase
  - heartbeat
```
public void heartbeat()
```
    Sends a heartbeat through the interceptor stack.
    Invoke this method from the application on a periodic basis if you have turned off internal heartbeats channel.setHeartbeat(false)
    
    Specified by:
    
    heartbeat in interface Channel
    
    Specified by:
    
    heartbeat in interface ChannelInterceptor
    
    Specified by:
    
    heartbeat in interface Heartbeat
    
    Overrides:
    
    heartbeat in class ChannelInterceptorBase
    
    See Also:
    
    Channel.setHeartbeat(boolean)
  - send
```
public UniqueId send(Member[] destination,
                     java.io.Serializable msg,
                     int options)
              throws ChannelException
```
    Send a message to the destinations specified
    
    Specified by:
    
    send in interface Channel
    
    Specified by:
    
    send in interface GroupChannelMBean
    
    Parameters:
    
    destination - Member[] - destination.length > 0
    
    msg - Serializable - the message to send
    
    options - sender options, options can trigger guarantee levels and different interceptors to react to the message see class documentation for the Channel object.
    
    Returns:
    
    UniqueId - the unique Id that was assigned to this message
    
    Throws:
    
    ChannelException - - if an error occurs processing the message
    
    See Also:
    
    Channel
  - send
```
public UniqueId send(Member[] destination,
                     java.io.Serializable msg,
                     int options,
                     ErrorHandler handler)
              throws ChannelException
```
    Description copied from interface: Channel
    
    Send a message to one or more members in the cluster
    
    Specified by:
    
    send in interface Channel
    
    Specified by:
    
    send in interface GroupChannelMBean
    
    Parameters:
    
    destination - Member[] - destination.length > 0
    
    msg - Serializable - the message to send
    
    options - sender options, options can trigger guarantee levels and different interceptors to react to the message see class documentation for the Channel object.
    
    handler - - callback object for error handling and completion notification, used when a message is sent asynchronously using the Channel.SEND_OPTIONS_ASYNCHRONOUS flag enabled.
    
    Returns:
    
    UniqueId - the unique Id that was assigned to this message
    
    Throws:
    
    ChannelException - - if an error occurs processing the message
    
    See Also:
    
    Channel
  - messageReceived
```
public void messageReceived(ChannelMessage msg)
```
    Callback from the interceptor stack.
    When a message is received from a remote node, this method will be invoked by the previous interceptor.
    This method can also be used to send a message to other components within the same application, but its an extreme case, and you're probably better off doing that logic between the applications itself.
    
    Specified by:
    
    messageReceived in interface ChannelInterceptor
    
    Overrides:
    
    messageReceived in class ChannelInterceptorBase
    
    Parameters:
    
    msg - ChannelMessage
  - sendNoRpcChannelReply
```
protected void sendNoRpcChannelReply(RpcMessage msg,
                                     Member destination)
```
    Sends a NoRpcChannelReply message to a member
    This method gets invoked by the channel if an RPC message comes in and no channel listener accepts the message. This avoids timeout
    
    Parameters:
    
    msg - RpcMessage
    
    destination - Member - the destination for the reply
  - memberAdded
```
public void memberAdded(Member member)
```
    memberAdded gets invoked by the interceptor below the channel and the channel will broadcast it to the membership listeners
    
    Specified by:
    
    memberAdded in interface MembershipListener
    
    Overrides:
    
    memberAdded in class ChannelInterceptorBase
    
    Parameters:
    
    member - Member - the new member
  - memberDisappeared
```
public void memberDisappeared(Member member)
```
    memberDisappeared gets invoked by the interceptor below the channel and the channel will broadcast it to the membership listeners
    
    Specified by:
    
    memberDisappeared in interface MembershipListener
    
    Overrides:
    
    memberDisappeared in class ChannelInterceptorBase
    
    Parameters:
    
    member - Member - the member that left or crashed
    
    See Also:
    
    Member.SHUTDOWN_PAYLOAD
  - setupDefaultStack
```
protected void setupDefaultStack()
                          throws ChannelException
```
    Sets up the default implementation interceptor stack if no interceptors have been added
    
    Throws:
    
    ChannelException - Cluster error
  - checkOptionFlags
```
protected void checkOptionFlags()
                         throws ChannelException
```
    Validates the option flags that each interceptor is using and reports an error if two interceptor share the same flag.
    
    Throws:
    
    ChannelException - Error with option flag
  - start
```
public void start(int svc)
           throws ChannelException
```
    Starts the channel.
    
    Specified by:
    
    start in interface Channel
    
    Specified by:
    
    start in interface ChannelInterceptor
    
    Specified by:
    
    start in interface GroupChannelMBean
    
    Overrides:
    
    start in class ChannelInterceptorBase
    
    Parameters:
    
    svc - int - what service to start
    
    Throws:
    
    ChannelException - Start error
    
    See Also:
    
    Channel.start(int)
  - startHeartbeat
```
protected void startHeartbeat()
```
  - stop
```
public void stop(int svc)
          throws ChannelException
```
    Stops the channel.
    
    Specified by:
    
    stop in interface Channel
    
    Specified by:
    
    stop in interface ChannelInterceptor
    
    Specified by:
    
    stop in interface GroupChannelMBean
    
    Overrides:
    
    stop in class ChannelInterceptorBase
    
    Parameters:
    
    svc - int
    
    Throws:
    
    ChannelException - Stop error
    
    See Also:
    
    Channel.stop(int)
  - getFirstInterceptor
```
public ChannelInterceptor getFirstInterceptor()
```
    Returns the first interceptor of the stack. Useful for traversal.
    
    Returns:
    
    ChannelInterceptor
  - getUtilityExecutor
```
public java.util.concurrent.ScheduledExecutorService getUtilityExecutor()
```
    Description copied from interface: Channel
    
    Return executor that can be used for utility tasks.
    
    Specified by:
    
    getUtilityExecutor in interface Channel
    
    Returns:
    
    the executor
  - setUtilityExecutor
```
public void setUtilityExecutor(java.util.concurrent.ScheduledExecutorService utilityExecutor)
```
    Description copied from interface: Channel
    
    Set the executor that can be used for utility tasks.
    
    Specified by:
    
    setUtilityExecutor in interface Channel
    
    Parameters:
    
    utilityExecutor - the executor
  - getChannelReceiver
```
public ChannelReceiver getChannelReceiver()
```
    Returns the channel receiver component
    
    Specified by:
    
    getChannelReceiver in interface ManagedChannel
    
    Returns:
    
    ChannelReceiver
    
    See Also:
    
    ChannelReceiver
  - getChannelSender
```
public ChannelSender getChannelSender()
```
    Returns the channel sender component
    
    Specified by:
    
    getChannelSender in interface ManagedChannel
    
    Returns:
    
    ChannelSender
    
    See Also:
    
    ChannelSender
  - getMembershipService
```
public MembershipService getMembershipService()
```
    Returns the membership service component
    
    Specified by:
    
    getMembershipService in interface ManagedChannel
    
    Returns:
    
    MembershipService
    
    See Also:
    
    MembershipService
  - setChannelReceiver
```
public void setChannelReceiver(ChannelReceiver clusterReceiver)
```
    Sets the channel receiver component
    
    Specified by:
    
    setChannelReceiver in interface ManagedChannel
    
    Parameters:
    
    clusterReceiver - ChannelReceiver
    
    See Also:
    
    ChannelReceiver
  - setChannelSender
```
public void setChannelSender(ChannelSender clusterSender)
```
    Sets the channel sender component
    
    Specified by:
    
    setChannelSender in interface ManagedChannel
    
    Parameters:
    
    clusterSender - ChannelSender
    
    See Also:
    
    ChannelSender
  - setMembershipService
```
public void setMembershipService(MembershipService membershipService)
```
    Sets the membership component
    
    Specified by:
    
    setMembershipService in interface ManagedChannel
    
    Parameters:
    
    membershipService - MembershipService
    
    See Also:
    
    MembershipService
  - addMembershipListener
```
public void addMembershipListener(MembershipListener membershipListener)
```
    Adds a membership listener to the channel.
    Membership listeners are uniquely identified using the equals(Object) method
    
    Specified by:
    
    addMembershipListener in interface Channel
    
    Specified by:
    
    addMembershipListener in interface GroupChannelMBean
    
    Parameters:
    
    membershipListener - MembershipListener
    
    See Also:
    
    MembershipListener
  - removeMembershipListener
```
public void removeMembershipListener(MembershipListener membershipListener)
```
    Removes a membership listener from the channel.
    Membership listeners are uniquely identified using the equals(Object) method
    
    Specified by:
    
    removeMembershipListener in interface Channel
    
    Specified by:
    
    removeMembershipListener in interface GroupChannelMBean
    
    Parameters:
    
    membershipListener - MembershipListener
    
    See Also:
    
    MembershipListener
  - addChannelListener
```
public void addChannelListener(ChannelListener channelListener)
```
    Adds a channel listener to the channel.
    Channel listeners are uniquely identified using the equals(Object) method
    
    Specified by:
    
    addChannelListener in interface Channel
    
    Specified by:
    
    addChannelListener in interface GroupChannelMBean
    
    Parameters:
    
    channelListener - ChannelListener
    
    See Also:
    
    ChannelListener, Heartbeat
  - removeChannelListener
```
public void removeChannelListener(ChannelListener channelListener)
```
    Removes a channel listener from the channel.
    Channel listeners are uniquely identified using the equals(Object) method
    
    Specified by:
    
    removeChannelListener in interface Channel
    
    Specified by:
    
    removeChannelListener in interface GroupChannelMBean
    
    Parameters:
    
    channelListener - ChannelListener
    
    See Also:
    
    ChannelListener
  - getInterceptors
```
public java.util.Iterator<ChannelInterceptor> getInterceptors()
```
    Returns an iterator of all the interceptors in this stack
    
    Specified by:
    
    getInterceptors in interface ManagedChannel
    
    Returns:
    
    Iterator
    
    See Also:
    
    Channel.addInterceptor(ChannelInterceptor)
  - setOptionCheck
```
public void setOptionCheck(boolean optionCheck)
```
    Enables/disables the option check
    Setting this to true, will make the GroupChannel perform a conflict check on the interceptors. If two interceptors are using the same option flag and throw an error upon start.
    
    Parameters:
    
    optionCheck - boolean
  - setHeartbeatSleeptime
```
public void setHeartbeatSleeptime(long heartbeatSleeptime)
```
    Configure local heartbeat sleep time
    Only used when getHeartbeat()==true
    
    Parameters:
    
    heartbeatSleeptime - long - time in milliseconds to sleep between heartbeats
  - setHeartbeat
```
public void setHeartbeat(boolean heartbeat)
```
    Enables or disables local heartbeat. if setHeartbeat(true) is invoked then the channel will start an internal thread to invoke Channel.heartbeat() every getHeartbeatSleeptime milliseconds
    
    Specified by:
    
    setHeartbeat in interface Channel
    
    Parameters:
    
    heartbeat - boolean
    
    See Also:
    
    Channel.heartbeat()
  - getOptionCheck
```
public boolean getOptionCheck()
```
    Specified by:
    
    getOptionCheck in interface GroupChannelMBean
    
    Returns:
    
    boolean
    
    See Also:
    
    setOptionCheck(boolean)
  - getHeartbeat
```
public boolean getHeartbeat()
```
    Specified by:
    
    getHeartbeat in interface GroupChannelMBean
    
    Returns:
    
    boolean
    
    See Also:
    
    setHeartbeat(boolean)
  - getHeartbeatSleeptime
```
public long getHeartbeatSleeptime()
```
    Returns the sleep time in milliseconds that the internal heartbeat will sleep in between invocations of Channel.heartbeat()
    
    Specified by:
    
    getHeartbeatSleeptime in interface GroupChannelMBean
    
    Returns:
    
    long
  - getName
```
public java.lang.String getName()
```
    Description copied from interface: Channel
    
    Return the name of this channel.
    
    Specified by:
    
    getName in interface Channel
    
    Returns:
    
    channel name
  - setName
```
public void setName(java.lang.String name)
```
    Description copied from interface: Channel
    
    Set the name of this channel
    
    Specified by:
    
    setName in interface Channel
    
    Parameters:
    
    name - The new channel name
  - isJmxEnabled
```
public boolean isJmxEnabled()
```
    Description copied from interface: JmxChannel
    
    If set to true, this channel is registered with jmx.
    
    Specified by:
    
    isJmxEnabled in interface JmxChannel
    
    Returns:
    
    true if this channel will be registered with jmx.
  - setJmxEnabled
```
public void setJmxEnabled(boolean jmxEnabled)
```
    Description copied from interface: JmxChannel
    
    If set to true, this channel is registered with jmx.
    
    Specified by:
    
    setJmxEnabled in interface JmxChannel
    
    Parameters:
    
    jmxEnabled - set to true if this channel should be registered with jmx.
  - getJmxDomain
```
public java.lang.String getJmxDomain()
```
    Description copied from interface: JmxChannel
    
    Return the jmx domain which this channel is registered.
    
    Specified by:
    
    getJmxDomain in interface JmxChannel
    
    Returns:
    
    jmxDomain
  - setJmxDomain
```
public void setJmxDomain(java.lang.String jmxDomain)
```
    Description copied from interface: JmxChannel
    
    Set the jmx domain which this channel should be registered.
    
    Specified by:
    
    setJmxDomain in interface JmxChannel
    
    Parameters:
    
    jmxDomain - The jmx domain which this channel should be registered.
  - getJmxPrefix
```
public java.lang.String getJmxPrefix()
```
    Description copied from interface: JmxChannel
    
    Return the jmx prefix which will be used with channel ObjectName.
    
    Specified by:
    
    getJmxPrefix in interface JmxChannel
    
    Returns:
    
    jmxPrefix
  - setJmxPrefix
```
public void setJmxPrefix(java.lang.String jmxPrefix)
```
    Description copied from interface: JmxChannel
    
    Set the jmx prefix which will be used with channel ObjectName.
    
    Specified by:
    
    setJmxPrefix in interface JmxChannel
    
    Parameters:
    
    jmxPrefix - The jmx prefix which will be used with channel ObjectName.
  - preRegister
```
public javax.management.ObjectName preRegister(javax.management.MBeanServer server,
                                               javax.management.ObjectName name)
                                        throws java.lang.Exception
```
    Specified by:
    
    preRegister in interface javax.management.MBeanRegistration
    
    Throws:
    
    java.lang.Exception
  - postRegister
```
public void postRegister(java.lang.Boolean registrationDone)
```
    Specified by:
    
    postRegister in interface javax.management.MBeanRegistration
  - preDeregister
```
public void preDeregister()
                   throws java.lang.Exception
```
    Specified by:
    
    preDeregister in interface javax.management.MBeanRegistration
    
    Throws:
    
    java.lang.Exception
  - postDeregister
```
public void postDeregister()
```
    Specified by:
    
    postDeregister in interface javax.management.MBeanRegistration

Class GroupChannel

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.catalina.tribes.ChannelInterceptor

Field Summary

Fields inherited from class org.apache.catalina.tribes.group.ChannelInterceptorBase

Fields inherited from interface org.apache.catalina.tribes.Channel

Constructor Summary

Method Summary

Methods inherited from class org.apache.catalina.tribes.group.ChannelInterceptorBase

Methods inherited from class java.lang.Object

Methods inherited from interface org.apache.catalina.tribes.Channel

Methods inherited from interface org.apache.catalina.tribes.group.GroupChannelMBean

Field Detail

sm

heartbeat

heartbeatSleeptime

heartbeatFuture

monitorFuture

coordinator

interceptors

membershipListeners

channelListeners

optionCheck

name

utilityExecutor

ownExecutor

Constructor Detail

GroupChannel

Method Detail

addInterceptor

heartbeat

send

send

messageReceived

sendNoRpcChannelReply

memberAdded

memberDisappeared

setupDefaultStack

checkOptionFlags

start

startHeartbeat

stop

getFirstInterceptor

getUtilityExecutor

setUtilityExecutor

getChannelReceiver

getChannelSender

getMembershipService

setChannelReceiver

setChannelSender

setMembershipService

addMembershipListener

removeMembershipListener

addChannelListener

removeChannelListener

getInterceptors

setOptionCheck

setHeartbeatSleeptime

setHeartbeat

getOptionCheck

getHeartbeat

getHeartbeatSleeptime

getName

setName

isJmxEnabled

setJmxEnabled

getJmxDomain

setJmxDomain

getJmxPrefix

setJmxPrefix

preRegister

postRegister

preDeregister

postDeregister