Transcript TIBCO Rendezvous

TIBCO Rendezvous
A Rendezvous message is a sequence of fields
containing self-describing data, it includes
data and descriptive information about the
data, including type,name, size.
Communication Models
Publish/Subscribe
• Event driven
• Broadcast or Multicast
• Unidirectional Communication
Communication Models
Request/Reply
• Demand driven
• Point-to-point unicast
• Communication is bi-directional.
Communication Models
Broadcast Request/Reply
• Event and Demand driven
• Broadcast or multicast and unicast
• Unidirectional and Bi-directional
Communication Models
Point-to-point
• Event driven
• Point-to-point
• Communication is uni-directional.
Transport Protocols
• TRDP-TIB Reliable Data Protocol
Reliable Transport protocol for ordered,
duplicate free data delivery with in a single
subnet.
• PGM-Pragmatic General Multicasting
Reliable multicast transport protocol for
ordered duplicate free data delivery over a
group of interconnected subnets.
RV Services
RV Provides four qualities of service that
extends standard RV functionality.
• Certified Messaging for guaranteed
message delivery.
• Fault Tolerance
• Distributed Queues.
• Virtual Circuits.
Certified Messaging(RVCM)
Fulfils the need  guaranteeing the delivery
of each message at its intended destination.
Handshake between publishers and
subscribers done by an unique name from
Subscribers.
Certified Messaging(RVCM)
Run-time procedure for RVCM. (Registering Certified Delivery
Agreement)
1.
CM Listener receives a CM Message which contains
• Name of the certified sender
• CM sequence number
2.
CM Listener records the sender name and subject name in its ledger
file.
3.
CM Listener sends a request for to the CM sender.
4.
CM Sender receives the request for registration and it will decide
accept or reject…..
Accept  it will record in its ledger file and messages coming from
that listener will be accepted and recorded.
Rejectit will inform the listener and no delivery agreement will be
done.
5. The certified sender explicitly informs the certified listener of the
acceptance, hence completes the Certified Delivery Agreement.
Certified Messaging(RVCM)
An RVCM message contains three additional fields
that are added to the message. These are:
•
•
•
CM Sequence # .
CM Time Limit .
CM Transport name of the publisher .
Fault Tolerance(RVFT)
RVFT is for fail-safe…
RVFT coordinates a set of concurrent processes with
in a group of FT members
A FT group is a set of application processes that
cooperate for FT services
Distributed Queue
DQ is a service that enables work to be spread
among more than one application, helping
optimize performance and support processing
stability.
As many applications can participate in this DQ
Adds Load Balancing for FT.
Virtual Circuit Transports
A virtual Circuit Transport is a light weight errorfree transport between two applications.
The Virtual Circuit Transport object appearing in
each application is called a Terminal.
Virtual Circuit Transports
Virtual Circuits guarantee these properties
All inbound messages come only from the opposite
terminal. Senders outside virtual circuit cannot
insert data into its message stream
All outbound messages go only to the opposite
terminal. Listeners outside of a VC cannot
receive its message stream.
Terminals receive explicit feedback if the connection
is interrupted, and they will take care of
recovery.