com.pcbsys.nirvana.client.nChannelAttributes Class Reference

This class is a container for the attributes necessary to create or locate a Nirvana channel or queue. More...

Public Member Functions

bool Equals (object obj)
 For Internal Use Only (Supporting automatic sorting in supporting data structures
 
bool Equals (long aLong)
 For Internal Use Only (Supporting automatic sorting in supporting data structures
 
int getChannelMode ()
 Returns the either channel (CHANNEL_MODE) or queue (QUEUE_MODE) More...
 
string getFullName ()
 Gets the full name of a channel, including the realm path if set. More...
 
int getMaxEvents ()
 Gets the maximum number of events the channel can contain. More...
 
string getName ()
 Gets the channel name More...
 
nStoreProperties getProperties ()
 Returns the nStoreProperties objec. More...
 
byte[][] getProtobufDescriptors ()
 Returns an array of the descruptors associated with this channel in byte[] form. More...
 
nChannelPublishKeys[] getPublishKeys ()
 Gets the channel keys for this channel More...
 
nRealm getRealm ()
 Gets the realm this channel exists within. More...
 
long getTTL ()
 Gets the Time To Live (TTL) value that will be applied to each event contained in the channel More...
 
int getType ()
 Gets the channel type, which will be equal to one of : More...
 
long getUniqueId ()
 Gets the Unique ID value for the channel More...
 
bool isClusterWide ()
 Is this channel cluster wide More...
 
bool isExternal ()
 Gets the isExternal flag to find out if the channel is marked as external. More...
 
bool isJMSEngine ()
 Specifies whether this channel will use the JMS Style fanout engine. More...
 
bool isMergeEngine ()
 Specifies whether this channel will use the Merge and Update Style fanout engine. More...
 
bool lessThan (object obj)
 For Internal Use Only (Supporting automatic sorting in supporting data structures
 
bool lessThan (long aLong)
 For Internal Use Only (Supporting automatic sorting in supporting data structures
 
 nChannelAttributes ()
 Default constructor
 
 nChannelAttributes (string name)
 Takes a channel or queue name More...
 
 nChannelAttributes (string _name, int _maxEvents, long _ttl, int _type)
 Constructs a nChannelAttributes object with the values specified. More...
 
 nChannelAttributes (string _name, int _maxEvents, long _ttl, int _type, nRealm _realm)
 Constructs a nChannelAttributes object with the values specified. More...
 
void setChannelMode (int mode)
 Sets the channel mode as either a queue or a channel. More...
 
void setClusterWide (bool flag)
 Specifies whether this channel is a cluster channel, where it will exist in all member nodes within the cluster. More...
 
void setDeadEventHandler (nAbstractChannel store)
 Set the dead event handler store for this channel / queue. More...
 
void setDeadEventHandler (nChannelAttributes store)
 Set the dead event handler store for this channel / queue. More...
 
void setMaxEvents (int value)
 Sets the maximum number of events the channel can contain. More...
 
void setName (string channelName)
 Set the channel name for this channel attribute object. More...
 
void setProtobufDescriptors (byte[][] descriptors)
 Sets the protobuf descriptors for this channel. More...
 
void setPublishKeys (nChannelPublishKeys[] keys)
 Sets the channel keys for this channel More...
 
void setRealm (nRealm _realm)
 Sets the realm the channel exists within, marking the channel as external. More...
 
void setTTL (long value)
 Sets the Time To Live (TTL) value for each event contained in the channel More...
 
void setType (int aType)
 Sets the type of channel. More...
 
void setUniqueId (long id)
 Sets the Unique ID value for the channel More...
 
void useJMSEngine (bool useJMSEngine)
 Sets whether to use the JMS style fanout engine. More...
 
void useMergeEngine (bool useMergeEngine)
 Sets whether to use the Merge fanout engine More...
 

Data Fields

const int CHANNEL_MODE = com.pcbsys.nirvana.nbase.nConstants.CHAN_MODE_NORMAL
 Specifies a channel (or topic) mode for the pub/sub model
 
const int DICTIONARY_STAMPING_DEFAULT = com.pcbsys.nirvana.nbase.nConstants.DICTIONARY_STAMPING_DEFAULT
 Dictionary stamping state - DEFAULT; by default the engine will fall back to the server-wide configuration setting
 
const int DICTIONARY_STAMPING_DISABLED = com.pcbsys.nirvana.nbase.nConstants.DICTIONARY_STAMPING_DISABLED
 Dictionary stamping state - DISABLED
 
const int DICTIONARY_STAMPING_ENABLED = com.pcbsys.nirvana.nbase.nConstants.DICTIONARY_STAMPING_ENABLED
 Dictionary stamping state - ENABLED
 
const int MIXED_TYPE = com.pcbsys.nirvana.nbase.nConstants.CHAN_MIXED
 Specifies a mixed (persistence and ttl set on a per event basis) channel type
 
const int OFF_HEAP_TYPE = com.pcbsys.nirvana.nbase.nConstants.CHAN_OFFHEAP
 Specifies a store where events are kept in off heap memory. More...
 
const int PAGE_TYPE = com.pcbsys.nirvana.nbase.nConstants.CHAN_PAGE
 Specifies an Paged Off Heap store, so the Server utilises memory outside of the JVM heap
 
const int PERSISTENT_TYPE = com.pcbsys.nirvana.nbase.nConstants.CHAN_PERSISTENT
 Specifies a persistent (on disk) channel type
 
const int QUEUE_MODE = com.pcbsys.nirvana.nbase.nConstants.CHAN_MODE_QUEUE
 Specifies a queue (point 2 point) mode for the queue model
 
const int RELIABLE_TYPE = com.pcbsys.nirvana.nbase.nConstants.CHAN_RELIABLE
 Specifies a reliable (in memory but with EIDs retained) channel type
 
const long sAllowFullAccess = 8
 Allow everyone to do everything on the channel / queue (Use with extreme caution since it bypasses any security checks for this channel / queue )
 
const long sAllowLastEIDAccess = 512
 Get the last known Event ID on the channel / queue
 
const long sAllowManageACLAccess = 2 + 1
 Allow everyone to add / remove acl entries on the channel / queue
 
const long sAllowNamedAccess = 2048
 Allow everyone to create a named object on this channel
 
const long sAllowPublishAccess = 32
 Allow everyone to write events to the channel / queue
 
const long sAllowPurgeAccess = 128
 Allow everyone to purge events from the channel ( Only valid on channels )
 
const long sAllowQueuePopAccess = 1024
 Allow everyone to pop events from the queue, (Only valid on Queues)
 
const long sAllowReadACLAccess = 4
 Allow everyone to read the ACL lists
 
const long sAllowSubscribeAccess = 64
 Allow everyone to subscribe to the channel ( Only valid on channels )
 
const int SIMPLE_TYPE = com.pcbsys.nirvana.nbase.nConstants.CHAN_SIMPLE
 Specifies a simple (in memory, no EIDs retained) channel type
 
const int TRANSIENT_TYPE = com.pcbsys.nirvana.nbase.nConstants.CHAN_TRANSIENT
 Specifies a relay (no events are stored) channel type
 

Detailed Description

This class is a container for the attributes necessary to create or locate a Nirvana channel or queue.

Constructor & Destructor Documentation

com.pcbsys.nirvana.client.nChannelAttributes.nChannelAttributes ( string  name)

Takes a channel or queue name

Parameters
namename of the channel
com.pcbsys.nirvana.client.nChannelAttributes.nChannelAttributes ( string  _name,
int  _maxEvents,
long  _ttl,
int  _type 
)

Constructs a nChannelAttributes object with the values specified.

Parameters
_nameA string specifying the channel name
_maxEventsAn int specifying the maximum number of events this channel can contain (i.e. the capacity)
_ttlAn int specifying the Time To Live (TTL) for events published in this channel (i.e. the age)
_typeAn int specifying the channel type. Valid values are nConstants.CHAN_RELIABLE or nConstants.CHAN_PERSISTENT
Exceptions
nIllegalArgumentExceptionis thrown if an incorrect parameter is passed to the constructor
com.pcbsys.nirvana.client.nChannelAttributes.nChannelAttributes ( string  _name,
int  _maxEvents,
long  _ttl,
int  _type,
nRealm  _realm 
)

Constructs a nChannelAttributes object with the values specified.

Parameters
_nameA string specifying the channel name
_maxEventsAn int specifying the maximum number of events this channel can contain (i.e. the capacity)
_ttlAn int specifying the Time To Live (TTL) for events published in this channel (i.e. the age)
_typeAn int specifying the channel type. Valid values are nConstants.CHAN_RELIABLE or nConstants.CHAN_PERSISTENT
_realmA nRealm object specifying the realm this channel exists within
Exceptions
nIllegalArgumentExceptionis thrown if an incorrect parameter is passed to the constructor

Member Function Documentation

int com.pcbsys.nirvana.client.nChannelAttributes.getChannelMode ( )

Returns the either channel (CHANNEL_MODE) or queue (QUEUE_MODE)

Returns
the channel mode specified in this channel attributes
string com.pcbsys.nirvana.client.nChannelAttributes.getFullName ( )

Gets the full name of a channel, including the realm path if set.

Returns
A string specifying the full name of a channel.
Exceptions
nBaseClientExceptionis thrown if the name value is not set
int com.pcbsys.nirvana.client.nChannelAttributes.getMaxEvents ( )

Gets the maximum number of events the channel can contain.

(i.e. the capacity)

Returns
An int specifying the maximum number of events this channel can currently contain (i.e. the current capacity)
string com.pcbsys.nirvana.client.nChannelAttributes.getName ( )

Gets the channel name

Returns
A string specifying the name value of the channel
nStoreProperties com.pcbsys.nirvana.client.nChannelAttributes.getProperties ( )

Returns the nStoreProperties objec.

byte [][] com.pcbsys.nirvana.client.nChannelAttributes.getProtobufDescriptors ( )

Returns an array of the descruptors associated with this channel in byte[] form.

Returns
an array of the descruptors in byte[] form.
nChannelPublishKeys [] com.pcbsys.nirvana.client.nChannelAttributes.getPublishKeys ( )

Gets the channel keys for this channel

Returns
nChannelPublishKeys[] The currently configured publish keys for this channel
nRealm com.pcbsys.nirvana.client.nChannelAttributes.getRealm ( )

Gets the realm this channel exists within.

Returns
an nRealm object specifying the realm this channel exists within within the realm you have a session to and use this object.
long com.pcbsys.nirvana.client.nChannelAttributes.getTTL ( )

Gets the Time To Live (TTL) value that will be applied to each event contained in the channel

Returns
A long specifying the current TTL value setting for the channel
int com.pcbsys.nirvana.client.nChannelAttributes.getType ( )

Gets the channel type, which will be equal to one of :

nChanneAttributes.MIXED_TYPE nChanneAttributes.SIMPLE_TYPE nChanneAttributes.PERSISTENT_TYPE nChanneAttributes.RELIABLE_TYPE nChanneAttributes.TRANSIENT_TYPE nChanneAttributes.OFF_HEAP_TYPE nChanneAttributes.PAGE_TYPE

Returns
an int specifying the channel's type
long com.pcbsys.nirvana.client.nChannelAttributes.getUniqueId ( )

Gets the Unique ID value for the channel

Returns
A long specifying the current Unique ID value for the channel
bool com.pcbsys.nirvana.client.nChannelAttributes.isClusterWide ( )

Is this channel cluster wide

Returns
if this channel is cluster wide
bool com.pcbsys.nirvana.client.nChannelAttributes.isExternal ( )

Gets the isExternal flag to find out if the channel is marked as external.

Returns
A bool specifying whether this channel is external or not
bool com.pcbsys.nirvana.client.nChannelAttributes.isJMSEngine ( )

Specifies whether this channel will use the JMS Style fanout engine.

For more information on this, please see the version 4.0 documentation.

Returns
whether events are delivered via the JMS fanout engine.
bool com.pcbsys.nirvana.client.nChannelAttributes.isMergeEngine ( )

Specifies whether this channel will use the Merge and Update Style fanout engine.

For more information on this, please see the version 5.0 documentation.

Returns
whether events are delivered via the Merge and update fanout engine.
void com.pcbsys.nirvana.client.nChannelAttributes.setChannelMode ( int  mode)

Sets the channel mode as either a queue or a channel.

These are specified as : nChannelAttributes.QUEUE_MODE & nChannelAttributes.CHANNEL_MODE

Parameters
mode- one of the supported modes, either queue or channel
Exceptions
nIllegalArgumentExceptionif the specified channel mode not one of the support modes
void com.pcbsys.nirvana.client.nChannelAttributes.setClusterWide ( bool  flag)

Specifies whether this channel is a cluster channel, where it will exist in all member nodes within the cluster.

Parameters
flagis this channel to exist across all cluster realms
void com.pcbsys.nirvana.client.nChannelAttributes.setDeadEventHandler ( nAbstractChannel  store)

Set the dead event handler store for this channel / queue.

When events reach there ttl or the channel hits its ttl, but have not been consumed, they can be placed in a dead event store. Setting the dead event store to be another valid channel or queue will enable this functionality and allow you to keep track of events that have died in this manner.

Parameters
storethe channel or queue to be set as the dead event store
void com.pcbsys.nirvana.client.nChannelAttributes.setDeadEventHandler ( nChannelAttributes  store)

Set the dead event handler store for this channel / queue.

When events reach there ttl or the channel hits its ttl, but have not been consumed, they can be placed in a dead event store. Setting the dead event store to be another valid channel or queue will enable this functionality and allow you to keep track of events that have died in this manner.

Parameters
storethe attributes of the channel or queue to be set as the dead event store
void com.pcbsys.nirvana.client.nChannelAttributes.setMaxEvents ( int  value)

Sets the maximum number of events the channel can contain.

(i.e. the capacity)

Parameters
valueAn int specifying the max number of events
Exceptions
nIllegalArgumentExceptionis thrown if an incorrect value is passed
void com.pcbsys.nirvana.client.nChannelAttributes.setName ( string  channelName)

Set the channel name for this channel attribute object.

If the channel begins with '/', a realm path is also created and the channel is marked as external.

Parameters
channelNameA string specifying the name of the channel for this channel attribute object.
Exceptions
nIllegalArgumentExceptionis thrown if an incorrect value is passed
void com.pcbsys.nirvana.client.nChannelAttributes.setProtobufDescriptors ( byte  descriptors[][])

Sets the protobuf descriptors for this channel.

Parameters
descriptorsan array of the descriptors in byte[] form.
void com.pcbsys.nirvana.client.nChannelAttributes.setPublishKeys ( nChannelPublishKeys[]  keys)

Sets the channel keys for this channel

Parameters
keysAn array of nChannelPublishKeys to be assigned to this channel
void com.pcbsys.nirvana.client.nChannelAttributes.setRealm ( nRealm  _realm)

Sets the realm the channel exists within, marking the channel as external.

If the realm is not set, it is implied that the channel exists within the realm you have a session to and use this object.

Parameters
_realmAn nRealm object specifying the realm the channel exists within
void com.pcbsys.nirvana.client.nChannelAttributes.setTTL ( long  value)

Sets the Time To Live (TTL) value for each event contained in the channel

Parameters
valueA long specifying the new TTL value
Exceptions
nIllegalArgumentExceptionis thrown if an invalid TTL value is specified
void com.pcbsys.nirvana.client.nChannelAttributes.setType ( int  aType)

Sets the type of channel.

Parameters
aTypeAn int specifying the channel type.
Exceptions
nIllegalArgumentExceptionis thrown if an illegal channel type is specified
void com.pcbsys.nirvana.client.nChannelAttributes.setUniqueId ( long  id)

Sets the Unique ID value for the channel

Parameters
idA long specifying the new unique id value
void com.pcbsys.nirvana.client.nChannelAttributes.useJMSEngine ( bool  useJMSEngine)

Sets whether to use the JMS style fanout engine.

Not applicable to queues.

Parameters
useJMSEngineuse the JMS fanout engine
void com.pcbsys.nirvana.client.nChannelAttributes.useMergeEngine ( bool  useMergeEngine)

Sets whether to use the Merge fanout engine

Parameters
useMergeEngineuse the Update and Merge fanout engine

Field Documentation

const int com.pcbsys.nirvana.client.nChannelAttributes.OFF_HEAP_TYPE = com.pcbsys.nirvana.nbase.nConstants.CHAN_OFFHEAP

Specifies a store where events are kept in off heap memory.

This store is similar to reliable, in that all events are in memory with no file backing.