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ashlam's avatar
ashlam
New Contributor
7 years ago

Custom Snap

I can’t able to get the values from previous snap.I used mapper to set a value and retrieve using expression from previous snap but getting error alike cannot set null value. @General(title = “Exam...
custom
Andrej_Bogdanov's avatar
Andrej_Bogdanov
New Contributor III
7 years ago

Hello,

We have posted a few blog posts regarding custom snap development on our website. I am sending you the URL for the 3 custom snaps developed by us that we have published so far, I believe you will find them useful. If you have any questions you can reach out to us.

Sleep snap: https://interworks.com.mk/development-of-custom-sleep-snap-for-snaplogic-platform/
Flow Reset snap: https://interworks.com.mk/development-of-a-custom-flow-reset-snap-for-the-snaplogic-platform/
Generic JDBC - Table Operation snap: https://interworks.com.mk/generic-jdbc-table-operation-custom-developed-snap/

Regards

  • ashlam's avatar
    ashlam
    New Contributor
    7 years ago

    Hi,
    Cant able to acces the URL’s above.

    Many thanks for taking time and replying for the post.

    Regards,
    Ashlam

    • rohithmadhavan's avatar
      rohithmadhavan
      Employee
      7 years ago

      You’ll need to evaluate the ExpressionProperty against the input document, not null. This cannot be done in the configure() method, use process() instead:

      ExpressionProperty valueCategoryExp;
String valueCategory;

@Override
public void configure(PropertyValues propertyValues) throws ConfigurationException {
	valueCategoryExp = propertyValues.getAsExpression(CACHE_DATA_ID);
}

@Override
protected void process(Document document, String s) {
        valueCategory = valueCategoryExp.eval(document);
}