topic Re: Modify the JAVA Code and regenerate the .jar in Talend Studio

Modify the JAVA Code and regenerate the .jar

Dobby1 — Sat, 16 Nov 2024 03:03:17 GMT

Hi I need to make a few minor modifications to the JAVA code generated by Talend and then regenerate the JAR file to test a performance issue that I am experiencing. When I build the Job, I see the source JAVA file and I am able to make the modification that I need and so my question is how would I go about rebuilding the .jar file from that modified .java source code?

When I try to run: javac <jobname>.java I get a bunch of errors "error: package routines does not exist ...import routines.DataOperation;...."

The modifications I want to make are:

Print the actual SQL prepared statement that is being sent to the database to do the insert
Print the time it takes to create the batch of records to be inserted
Print the time it takes to commit the records to the database
Change pstmt_tDBOutput_1.setNull(1, java.sql.Types.DATE); to pstmt_tDBOutput_1.setNull(1, java.sql.Types.TIMESTAMP);

I am on Windows and using Talend Studio Version: 7.2.1.

Re: Modify the JAVA Code and regenerate the .jar

Anonymous — Mon, 09 Mar 2020 01:47:18 GMT

Hi
You can not modify the generated Java code of job, the change will be not be saved.
you can modify the source files of component, the source files of official components are located in <studio installation>\plugins\org.talend.designer.components.localprovider_7.1.1.20181026_1147\components.
About component development, please refer to this documentation.
https://help.talend.com/reader/2zoPbB~8uGpH2pU_w0z6Bg/d006zJ6FDVR1cGuZlwiwHQ

Note that don't forget to backup the component folder before you modify the component.

Regards
Shong

Re: Modify the JAVA Code and regenerate the .jar

Dobby1 — Tue, 10 Mar 2020 12:36:46 GMT

Thank you. I have looked in the directory and have seen the files. I'm trying to see exactly which file I need to modify and how I need to modify it.

Re: Modify the JAVA Code and regenerate the .jar

Dobby1 — Wed, 11 Mar 2020 12:07:59 GMT

Thank you very much. I was able to modify the appropriate javajet file and got the results I wanted.

Re: Modify the JAVA Code and regenerate the .jar

Dobby1 — Tue, 07 Apr 2020 03:01:45 GMT

Hi,

After modifying the .javajet file do I need to perform any other step for Talend to pickup the change to the component? I changed the following lings in the below files but I don't think it is reflected in the generated code.

---------- TMSSQLOUTPUT_END.JAVAJET

[168] <%=prefix+cid%>.setNull(count<%=cid%>,java.sql.Types.DATE);

---------- TMSSQLOUTPUT_MAIN.JAVAJET

[170] <%=prefix+cid%>.setNull(counter<%=cid%>,java.sql.Types.DATE);

The java.sql.Types.DATE was changed to java.sql.Types.TIMESTAMP.