tAS400CDC Standard properties

Select a type of database from the list and click Apply.

Use an existing connection

Select this check box and in the Component List drop-down list, select the desired connection component to reuse the connection details you already defined.

Property type

DB Version

Select the AS/400 database version you are using.

Host name

Database server IP address.

Database

Name of the CDC database.

Username and Password

DB user authentication data.

To enter the password, click the [...] button next to the password field, and then in the pop-up dialog box enter the password between double quotes and click OK to save the settings.

Schema and Edit Schema

A schema is a row description. It defines the number of fields (columns) to be processed and passed on to the next component. When you create a Spark Job, avoid the reserved word line when naming the fields.

Built-In: You create and store the schema locally for this component only.

Repository: You have already created the schema and stored it in the Repository. You can reuse it in various projects and Job designs.

Table Name

Short name of the source table where changes made to data should be captured. The target CDC table uses automatically this short name to name itself.

Source Library

The AS/400 database's source library.

Subscriber

Enter the name of the application that will use the change table.

Events to catch

Insert: Select this check box to catch the data inserted in the change table since the last extraction.

Update: Select this check box to catch the data updated in the change table since the last extraction.

Delete: Select this check box catch the data deleted in the change table since the last extraction.

Member

Enter the name of the member that holds the desired records. A member is part of a physical file in the library and contains a group of entries. For details, search format of an AS/400 file at http://www.ibm.com.

Additional JDBC parameters

Specify additional connection properties for the DB connection you are creating. This option is not available if you have selected the Use an existing connection check box in the Basic settings.

Process all input data and empty CDC table

Select this option to process all the input data and empty CDC tables.

Keep data in CDC Table

Select this check box to keep the changes made available to one or more target systems, even after they have been consulted.

Trim all the String/Char columns

Select this check box to remove leading and trailing whitespace from all the String/Char columns.

Trim column

Remove leading and trailing whitespace from defined columns.

Disable command

Select this check box to be able to manually call the RUNCDC program by yourself to write changes to the CDC table.

Customize command

Select this check box to specify the parameters of the commands to be executed by tAS400CDC.

The following gives the syntax of the command executed by tAS400CDC.

library/RUNCDC OPTION(*RUN)
               FILE(DATA_LIB/FILE)
               JOURNAL(*FILE) LIBOUT(*DEFAULT) MBROPT(*ADD) MODE(*CURRENT) DTCHJRN(*YES)

where,

• OPTION, specifies the operation to perform. You can specify *RUN (the default), *ENDRUN, *HELP, *LOG, *PARM, and *TAB.
• FILE, lists the files to be extracted with the library where the files reside. The RUNCDC command can extract data from multiple files given that the files are in the same library. To do so, provide this parameter in this form: FILE(DATA_LIB/FILE1 DATA_LIB/FILE2 DATA_LIB/FILE3...). You can specify up to 300 files.
• JOURNAL, specifies the name and the library of the journal to be processed. By default, the journal that is attached to the files is specified.
• LIBOUT, specifies the output library for the generated files.
• MBROPT, specifies the output option for the generated files, which can be *ADD (the default) and *REPLACE.
• MODE, specifies the log reading mode, which can be *DETACHED (the default), *CURRENT, and *REEL.
• DTCHJRN, specifies whether the journal receiver should be detached at the start of processing. This parameter can be *YES (the default) and *NO. This parameter is used only when the value of the MODE parameter is DETACHED.

By default, the component execute the following command.

<CDC_library_name>/RUNCDC FILE(<Source_library_name>/<Source_table_name>) 
                          LIBOUT(<CDC_library_name>) MODE(*DETACHED) MBROPT(*ADD) DTCHJRN(*YES)

For more information about the RUNCDC command, refer to CDC_Documentation_1.09_EN.pdf. You can find this document at <Studio_install>\plugins\org.talend.designer.cdc_<version>\resource\.

tStatCatcher Statistics

Select this check box to collect log data at the component level.

Usage rule

This component is used as a start component. It requires an output component and row Main link.

Note that the journal and the receiver required by CDC are typically controlled by the administrator of the AS/400 system. For this reason, since version 5.4.2 (included) of the Studio, tAS400CDC runs the RUNCDC program only and does not automatically create, activate, deactivate, modify or delete any journal or receiver of that AS/400 system any more. You need to contact the AS/400 administrator before performing any of these operations. Depending on the policy in your company, the administrator will either perform the operation or provide you with the authorization to do it yourself.

Because of this behavior updates, since 5.4.2, the tAS400CDC component does not execute the following command as it did in the 5.4.1 or earlier versions:

CHGJRN JRN(<Source_library_name>/<Source_table_name>) JRNRCV(*GEN)

This command is used to ensure that an older receiver is detached from a journal and a newer one is attached to the journal to retrieve the last change. You are then recommended to execute this command in your AS/400 system before running this component. Alternatively, enter the example command given above for the Customize command check box is selected, in order to automate the detachment and attachment process.

For further information about how the CDC for AS/400 is handled by the Studio since version 5.4.2, see the sections describing the CDC architecture and how to set up CDC in Redo/Archive log mode (journal) for AS/400 in Talend Studio User Guide.