Tech Note: Oracle BAM –Reading external Database Tables contents into BAM
Active Data Cache Data Objects
Supported Version: Oracle BAM 10.1.3
Objectives
• To read DB tables data into ADC objects.
• This is not recommended to get real time data into ADC.
• This can be used only for periodic controlled refresh of data.
Prerequisite:
• Installed version of Oracle BAM.
• Knowledge of Oracle BAM and Databases (schema, table, etc).
• Start all databases and TNSListener.
Verify DB Table definitions
Start a sql window (to verify your tables in your external database)
Example: sqlplus system/manager@iasdb
Oracle BAM Plans
Start DesignStudio (thick client to write plans).
Define a BaseView & MetaView.
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Tech Note: Oracle BAM –Reading external Database Tables contents into BAM
Active Data Cache Data Objects
Click on “create new baseview” icon.
Give the database connection parameters for this definition (as below). “Host String” is
the service name that is used to connect to Oracle database (in tnsnames.ora)
Click on SnapBaseView, give it a name in the text box.
Click on “autocreate metaview”, click on tables >>. This will read your database and
bring in all the table definitions. Select ONLY the tables that are of interest to you.
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Active Data Cache Data Objects
Click on OK. (this will bring in all the baseviews to your design studio)
Click on the tools icon = (at the bottom left of the application). Create a small plan as
shown below. (drag & drop a sql query & grid pallet on the plan window).
Next click on the parts icon under the application left bottom window.
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Tech Note: Oracle BAM –Reading external Database Tables contents into BAM
Active Data Cache Data Objects
This will show all the metaviews created. (you can right click on the column name and
rename these names). Drag and drop the required columns on the sql query box. This will
automatically create the SQL statement and also show the column names under the grid.
Click on update button to test. (This will read the database tables and display the required
values – as shown below).
Click on “toolbar” icon below, to change the definition of your plan.
Delete the grid icon, and drag and drop an insert box.
Set the properties to “autocreate” the object and give the dataobject the required name.
Click on update, let the BAM tool, read the database, and create a new dataobject and
populate it with the full data. (do not save the plan yet)
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Tech Note: Oracle BAM –Reading external Database Tables contents into BAM
Active Data Cache Data Objects
Verify in the Oracle BAM Architect console that the new dataobject is created with
correct fields, and populated with correct data.
Close the architect. In the DesignStudio thick client application, delete “insert” box from
the plan, and drag & drop an update icon. (replace insert with update). Double click on
the update icon, and set it properties as given below.
Set the “ADC information”, and choose the required object from the list.
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Active Data Cache Data Objects
Click on the “record selection” tab, and choose : OrdId (or the unique column selector
required by your update operation).
Click on the ‘update specification” tab, and choose “all” to populate the fields required.
(Check the “insert record if not found” box), Click ok and close this dialog box.
Note – you can choose the properties of this dialog box as per your requirement.
Click on “Tools= Plan Properties – give this plan a name (example: myplan). Save this
plan and close this window.
Plan execution steps:
Running the plan to continuously update the ADC dataobjects from the database tables.
Option #1.
Set the plan to run continuously. In this mode, the plan executes once, completes the
above steps end to end, and stops. The plan monitor is set to restart after completion and
to monitor the plan. Thus, rendering the plan to run- complete execution-stop, restartrerun- complete execution-stop, restart –rerun etc., and this cycles goes on endlessly
without any delay between the consecutive starts. This may be CPU intensive, DB
intensive (if intensive) and undesirable in some cases, not justifying the loads for the
required DB synchronization needs.
Open Oracle BAM administrator, select Plan Monitor from drop down list, and select –
plan settings. Check the plan settings as below for your plan, and save the changes.
Next, select “request plan settings check”, and complete the operation by clicking on
continue button. This will initiate the plan monitor to execute, and monitor the plan for
continuous run. Restart BAM Plan Monitoring Service in Windows Services.
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Tech Note: Oracle BAM –Reading external Database Tables contents into BAM
Active Data Cache Data Objects
Observe that the ADC object is updated with latest data from the external database tables
(if there are any changes).
Option #2
This is more a controlled execution of the plan at a given frequency rate, monitored by
the event engine, and administered as an alert action. The alert mechanism is tuned to
monitor for plan completion, and restart this plan for every required frequency period.
Hence this works like a scheduled task in the BAM server.
Open the ActiveStudio, and create a new alert, select “create a new rule”. In the rule
definition window, select “Every interval between two times’.
Give the rule a name, set the time interval as required (example 10 minutes).
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Active Data Cache Data Objects
Set the start and end time as required (example: 00:00:10 AM to 11:50:00 PM)
Click on next to get the next dialog box.
In the next dialog box, select particular day of week (and set the required day of week as
needed, see below for example), and set to run a plan (select your plan from the list).
Click on OK to save and close the alert rule definition box.
This completes the plan execution steps as monitored by event engine, and as scheduled
by the parameters given above.
Insert a new data row in the database table. Observe that the ADC object is updated with
latest data from the external database tables (if there are any changes, and after the plan is
run by the event engine at above given frequency constrains).
Summary:
• To read DB tables data into ADC objects.
• This is not recommended to get real time data into ADC.
• This can be used only for periodic controlled refresh of data.
• There are heavy performance penalties on this architecture depending on the
number of rows in the database tables.
• Performance, DB Connection Pooling, etc observations should be taken into
account.
• Contact Oracle BAM team for detailed analysis and steps and best practices.
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Tech Note: Oracle BAM –Reading external Database Tables contents into BAM
Active Data Cache Data Objects
Note:
The above plans and examples show only updating the ADC objects using the database
table contents. It will not check for duplicates or old-deletes etc. You have to include
logic in your plans to process all possible conditions. One example is given below using a
plan definition.
Questions & Clarifications:
If you have any comments or need additional information, please communicate through
the Oracle BAM forum at: http://forums.oracle.com/forums/forum.jspa?forumID=252
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