Class SIZE

java.lang.Object

org.jgroups.stack.Protocol

org.jgroups.protocols.SIZE

public class SIZE
extends Protocol

Protocol which prints out the real size of a message. To do this, the message is serialized into a byte buffer and its size read. Don't use this layer in a production stack since the costs are high (just for debugging).

Author:

Bela Ban June 13 2001

Field Summary

Fields inherited from class Protocol

down_prot, log, props, stack, stats, up_prot

Constructor Summary

Constructors

Constructor	Description
SIZE()

Method Summary

Modifier and Type	Method	Description
Object	down(Event evt)	An event is to be sent down the stack.
String	getName()	All protocol names have to be unique !
void	init()	Called after instance has been created (null constructor) and before protocol is started.
boolean	setProperties(Properties props)	Setup the Protocol instance acording to the configuration string
Object	up(Event evt)	An event was received from the layer below.

Methods inherited from class Protocol

destroy, downThreadEnabled, dumpStats, enableStats, getDownProtocol, getProperties, getProtocolStack, getThreadFactory, getTransport, getUpProtocol, printStats, providedDownServices, providedUpServices, requiredDownServices, requiredUpServices, resetStats, setDownProtocol, setPropertiesInternal, setProtocolStack, setUpProtocol, start, statsEnabled, stop, upThreadEnabled

Methods inherited from class Object

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

Constructor Details

SIZE

public SIZE()

Method Details

getName

public String getName()

All protocol names have to be unique !

Specified by:

getName in class Protocol

init

public void init()

Description copied from class: Protocol

Called after instance has been created (null constructor) and before protocol is started. Properties are already set. Other protocols are not yet connected and events cannot yet be sent.

Overrides:

init in class Protocol

setProperties

public boolean setProperties(Properties props)

Setup the Protocol instance acording to the configuration string

Overrides:

setProperties in class Protocol

up

public Object up(Event evt)

Description copied from class: Protocol

An event was received from the layer below. Usually the current layer will want to examine the event type and - depending on its type - perform some computation (e.g. removing headers from a MSG event type, or updating the internal membership list when receiving a VIEW_CHANGE event). Finally the event is either a) discarded, or b) an event is sent down the stack using down_prot.down() or c) the event (or another event) is sent up the stack using up_prot.up().

Overrides:

up in class Protocol

down

public Object down(Event evt)

Description copied from class: Protocol

An event is to be sent down the stack. The layer may want to examine its type and perform some action on it, depending on the event's type. If the event is a message MSG, then the layer may need to add a header to it (or do nothing at all) before sending it down the stack using down_prot.down(). In case of a GET_ADDRESS event (which tries to retrieve the stack's address from one of the bottom layers), the layer may need to send a new response event back up the stack using up_prot.up().

Overrides:

down in class Protocol