org.javagroups.protocols
Class AUTOCONF
java.lang.Object
|
+--org.javagroups.stack.Protocol
|
+--org.javagroups.protocols.AUTOCONF
- public class AUTOCONF
- extends Protocol
Senses the network configuration when it is initialized (in init()) and sends a CONFIG event up
and down the stack. The CONFIG event contains a hashmap, with strings as keys (e.g. "frag_size")
and Objects as values. Certain protocols can set some of their properties when receiving the CONFIG
event.
This protocol should be placed above the transport protocol (e.g. UDP). It is not needed for TCP.
Example: senses the network send and receive buffers, plus the max size of a message to be sent and
generates a CONFIG event containing "frag_size", "send_buf_size" and "receive_buf_size" keys.
- Author:
- Bela Ban
Fields inherited from class org.javagroups.stack.Protocol |
down_handler, down_prot, down_queue, down_thread, observer, props, stack, up_handler, up_prot, up_queue, up_thread |
Method Summary |
void |
down(Event evt)
An event is to be sent down the stack. |
java.lang.String |
getName()
|
void |
init()
Called after instance has been created (null constructor) and before protocol is started |
boolean |
setProperties(java.util.Properties props)
Setup the Protocol instance acording to the configuration string |
void |
startDownHandler()
Leave empty: no down_thread will be created, but the down_thread of the neighbor above us will be used |
void |
startUpHandler()
Leave empty: no up_thread will be created, but the up_thread of the neighbor below us will be used |
void |
up(Event evt)
An event was received from the layer below. |
Methods inherited from class org.javagroups.stack.Protocol |
getDownProtocol, getDownQueue, getProperties, getUpProtocol, getUpQueue, passDown, passUp, providedDownServices, providedUpServices, receiveDownEvent, receiveUpEvent, requiredDownServices, requiredUpServices, setDownProtocol, setObserver, setPropertiesInternal, setProtocolStack, setUpProtocol, stopInternal |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
AUTOCONF
public AUTOCONF()
getName
public java.lang.String getName()
- Overrides:
getName
in class Protocol
init
public void init()
throws java.lang.Exception
- Description copied from class:
Protocol
- Called after instance has been created (null constructor) and before protocol is started
- Overrides:
init
in class Protocol
setProperties
public boolean setProperties(java.util.Properties props)
- Setup the Protocol instance acording to the configuration string
- Overrides:
setProperties
in class Protocol
up
public void 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
passDown()
or c) the event (or another event) is sent up
the stack using passUp()
.
- Overrides:
up
in class Protocol
down
public void 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
passDown()
. 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 passUp()
.
- Overrides:
down
in class Protocol
startUpHandler
public void startUpHandler()
- Leave empty: no up_thread will be created, but the up_thread of the neighbor below us will be used
- Overrides:
startUpHandler
in class Protocol
startDownHandler
public void startDownHandler()
- Leave empty: no down_thread will be created, but the down_thread of the neighbor above us will be used
- Overrides:
startDownHandler
in class Protocol
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