topic Re: Reading context param in Talend Studio

Reading context param

Anonymous — Mon, 27 Apr 2020 19:12:48 GMT

Greetings:

I am trying to read file name as an input from context param and pass it to s3Get to read it from a bucket. I tried using s3List and s3Get to read files and it works fine. But my requirement is to read a file that is given through command line argument. I am getting NullPointer exception when the code is trying to look for the context param in the context. I ran the debugger and found the following code acting weird. I appreciate any help.

if (inContext == null) {
inContext = S3ReadFile.class.getClassLoader()
.getResourceAsStream("config/contexts/" + contextStr + ".properties");
}
if (inContext != null) {
// defaultProps is in order to keep the original context value
if (context != null && context.isEmpty()) {
defaultProps.load(inContext);
context = new ContextProperties(defaultProps);
}

inContext.close();
} else if (!isDefaultContext) {
// print info and job continue to run, for case: context_param is not empty.
System.err.println("Could not find the context " + contextStr);
}

I am using Studio for Data Integration v7.3. Here are my project details.

Re: Reading context param

TRF — Mon, 27 Apr 2020 20:15:23 GMT

How are you passing parameters from the command line? Did you try "–context_param yourParameter=whatYouWant"?

Re: Reading context param

Anonymous — Mon, 27 Apr 2020 20:31:26 GMT

Yes, that is what I tried. I also tried setting up prompt value to test run from the studio. Same error both times.

Re: Reading context param

TRF — Mon, 27 Apr 2020 21:21:17 GMT

You have to connect tS3Get to tS3Connection to ensure tS3Get starts after the connection has been established:
tS3Connection--(OnComponentOk)-->tS3Get

Re: Reading context param

Anonymous — Mon, 27 Apr 2020 21:24:45 GMT

S3Get is not using existing connection. I have connection details given
with in S3Get. I don't really need tS3Connection.

Re: Reading context param

TRF — Mon, 27 Apr 2020 21:38:46 GMT

So what if you really remove tS3Connection?

Re: Reading context param

Anonymous — Mon, 27 Apr 2020 21:46:45 GMT

I just tried that too. Same issue.

Exception in component tS3Get_1 (S3ReadFile)
java.lang.NullPointerException
at westat.s3readfile_0_1.S3ReadFile.tS3Get_1Process(S3ReadFile.java:587)
at westat.s3readfile_0_1.S3ReadFile.runJobInTOS(S3ReadFile.java:7331)
at westat.s3readfile_0_1.S3ReadFile.main(S3ReadFile.java:7175)