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java.lang.Object | +--org.javagroups.stack.Protocol | +--org.javagroups.protocols.TCP
TCP based protocol. Creates a server socket, which gives us the local address of this group member. For
each accept() on the server socket, a new thread is created that listens on the socket.
For each outgoing message m, if m.dest is in the ougoing hashtable, the associated socket will be reused
to send message, otherwise a new socket is created and put in the hashtable.
When a socket connection breaks or a member is removed from the group, the corresponding items in the
incoming and outgoing hashtables will be removed as well.
This functionality is in ConnectionTable, which isT used by TCP. TCP sends messages using ct.send() and
registers with the connection table to receive all incoming messages.
Field Summary |
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Fields inherited from class org.javagroups.stack.Protocol |
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down_handler, down_prot, down_queue, down_thread, down_thread_prio, observer, props, stack, up_handler, up_prot, up_queue, up_thread, up_thread_prio |
Constructor Summary | |
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TCP()
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Method Summary | |
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void |
connectionClosed(Address peer_addr)
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void |
connectionOpened(Address peer_addr)
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void |
down(Event evt)
Sent to destination(s) using the ConnectionTable class. |
java.lang.String |
getName()
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void |
receive(Message msg)
ConnectionTable.Receiver interface |
boolean |
setProperties(java.util.Properties props)
Setup the Protocol instance acording to the configuration string |
void |
start()
This method is called on a Channel.connect(String) . |
void |
startUpHandler()
DON'T REMOVE ! This prevents the up-handler thread to be created, which essentially is superfluous: messages are received from the network rather than from a layer below. |
void |
stop()
This method is called on a Channel.disconnect() . |
java.lang.String |
toString()
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Methods inherited from class org.javagroups.stack.Protocol |
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destroy, getDownProtocol, getDownQueue, getProperties, getUpProtocol, getUpQueue, init, passDown, passUp, providedDownServices, providedUpServices, receiveDownEvent, receiveUpEvent, requiredDownServices, requiredUpServices, setDownProtocol, setObserver, setPropertiesInternal, setProtocolStack, setUpProtocol, startDownHandler, stopInternal, up |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
public TCP()
Method Detail |
public java.lang.String toString()
toString
in class java.lang.Object
public java.lang.String getName()
getName
in class Protocol
public void startUpHandler()
startUpHandler
in class Protocol
public void start() throws java.lang.Exception
Protocol
Channel.connect(String)
. Starts work.
Protocols are connected and queues are ready to receive events.
Will be called from bottom to top. This call will replace
the START and START_OK events.
start
in class Protocol
java.lang.Exception
- Thrown if protocol cannot be started successfully. This will cause the ProtocolStack
to fail, so Channel.connect(String)
will throw an exceptionpublic void stop()
Protocol
Channel.disconnect()
. Stops work (e.g. by closing multicast socket).
Will be called from top to bottom. This means that at the time of the method invocation the
neighbor protocol below is still working. This method will replace the
STOP, STOP_OK, CLEANUP and CLEANUP_OK events. The ProtocolStack guarantees that
when this method is called all messages in the down queue will have been flushed
stop
in class Protocol
public void down(Event evt)
down
in class Protocol
public void receive(Message msg)
receive
in interface ConnectionTable.Receiver
public void connectionOpened(Address peer_addr)
connectionOpened
in interface ConnectionTable.ConnectionListener
public void connectionClosed(Address peer_addr)
connectionClosed
in interface ConnectionTable.ConnectionListener
public boolean setProperties(java.util.Properties props)
setProperties
in class Protocol
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