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Adapters for TIBCO

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Active Database Adapter (ADB)

- A real time bi-directional gateway between databases and applications

- Supports both publish-subscribe and request-response interactions

- Proactively notifies applications of changes that occur inside the database

- Subscribe to messages from other applications and capture the messages into targettables in the database

- Requests from applications are processed by the adapter and replies containing theprocessed request are sent back by the adapter to the requesting application

- Works with ODBC and JDBC compliant databases (Oracle, Sybase, and MS SQL Server)

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ADB Architecture

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Publications - Method to monitor an individual table & publish any change as entirerecord over the TIB with flag (I, U, D)

Subscriptions Method to take incoming information in and store it on the database

Request/Reply - Allows adapter to query (request) the database and send backimmediate response (reply)Request - Multiple SQL and/or procedure statements to be processed

Reply - Answer for these messages processed by the agent

Listener-- To configure a publisher agent that sends messages on subjects using the RVCM- Adds a subscriber agent (called a listener) to the publisher agent's preregistered list- Subscriber agent is certified to receive all messages sent on the specified subject

Parent Child RelationshipPublications

Table Relationships - To send out extra information with a publicationSubscriptions

Child Table Mapping- Used by subscriber agent to process a message thatincludes data from the publishing (parent) table and related data from another(child) table

Services of the ADB

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Features

- Automatically publish data as TIBCO RV messages when rows in pre-specified DBtables are modified

Publish data by value creating a copyPublish data by reference w/o creating a copyPublish on parameterized subjects subject created from contents of PT columnsPublish data using TIBCO RV reliable delivery, certified delivery or bothPre-register certified subscribers with a certified publisherPublish both parent and all related child rows when user set up to publish childdata

- Automatically subscribe to data published as TIBCO RV messages and modify the datain pre-specified DB tables

- Use request-response semantics to publish SQL statements, stored procedures, or bothon a specified subject

Support both RV Message and AE Message wire formatsSupport RPC (Remote Procedure Calls)

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Publish by Value- Modified data in the source table is duplicated in the PT- ADB selects the data from the PT, compose a message and sends it to RV- Advantage - Publish by copy is fast- Disadvantage - Does not support some data types(Oracle LONG and LONG RAW)

Publish by Reference- Publish data directly from the source table without copying to a publishing table- Operate on the key value of source table copied into PT- Advantage :

Data to be published is stored just onceData types such as Oracle LONG and LONG RAW are supportedPublishing by value from a top-level table is unsupported due to database triggerlimitations

- Disadvantage : Small time gap between source table modification & picked up byadapter

Parameterized Subjects- Created from contents of one or more columns in a publishing table

eg - TIBCO.ORDER.$ORDER_ID.$ORDER_DESCRIPTION- Allows receiving applications to filter publications based on value of certain fields- Supported with certified & reliable delivery- Restrictions : Max 255 char in length, with each component max 127 char (Content

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Publication-Subscription Services Flow

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Typical Request-Response Service Flow

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ADB Architecture Components

Run-time Adapter -A bi-directional bridge between your database and the TIBCO environment

Design-time Adapter - Used at design-time to fetch the tables from your database that need to beconfigured for an adapter instance.

TIBCO Run-time Agent - Provides connectivity to other applications configured for the TIBCOenvironment.

Polling or Alerter -

Polling - Monitor frequent changes to PTAlerter - Asynchronously alert the adapter of infrequent changes in PT

Referencing External Schemas - External schema can be referenced when specifying a publishersource table or subscriber destination table

Exception Table - If a subscriber adapter fails to write data to its destination table, it will write thedata to the exception table.

Loop Detection - If a source table is used both as the source and destination table on the samesubject, the loop detection feature should be enabled, to prevent the same changes from beingpublished repeatedly

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Publish-Subscribe Exercise

ORDER_TABLE Pub_OrderXXX XXX XXX XXX XXX XXX

Sub_Order

Order_ID

Order_Description,

Order_Price

Order_ID

Order_Description

Order_Price

ADB related columns

Order_ID

Order_Description,

Order_Price

Agentone Agent two

ADB.agentone.ORDER

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Parent/Child Tables Exercise

CUSTOMER

Order_Details

XXX XXX

XXX XXX

XXX XXX

Internal_Order_ItemsXXX XXX

External_Order_Items