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sg_sripathi's avatar
sg_sripathi
New Contributor III
6 years ago
Solved

SnapLogic SDK - Accessing pipeline properties and parameters

Hi, I am writing a custom snap in which I would like to get the pipeline name, runtime id and few predefined path parameter. I do not want to capture these as snap level properties for user to conf...
expression_language
  • robin's avatar
    robin
    6 years ago

    Hello @sg_sripathi, good question and yes this can be done.

    Inject the expression utility class:

    @Inject
private ExpressionUtils expressionUtils;

String pipeLabel;

    then in the configure() method:

    @Override
public void configure(PropertyValues propertyValues)
            throws ConfigurationException {
  Document emptyDoc = documentUtility.newDocument();
  pipeLabel = expressionUtils.createExpressionProperty(
  propertyValues, true, "pipe.label").eval(emptyDoc);
}

    And then you can just use the variable when writing an output document e.g.:

    Map<String, String> data = new LinkedHashMap<String, String>() {{
  put("pipeLabel", pipeLabel);
}};
outputViews.write(documentUtility.newDocument(data));

    The Mapper Snap can be used to validate whatever expression value you are trying to use in the custom Snap:

robin's avatar
robin
Former Employee
6 years ago

Hello @sg_sripathi, good question and yes this can be done.

Inject the expression utility class:

@Inject
private ExpressionUtils expressionUtils;

String pipeLabel;

then in the configure() method:

@Override
public void configure(PropertyValues propertyValues)
            throws ConfigurationException {
  Document emptyDoc = documentUtility.newDocument();
  pipeLabel = expressionUtils.createExpressionProperty(
  propertyValues, true, "pipe.label").eval(emptyDoc);
}

And then you can just use the variable when writing an output document e.g.:

Map<String, String> data = new LinkedHashMap<String, String>() {{
  put("pipeLabel", pipeLabel);
}};
outputViews.write(documentUtility.newDocument(data));

The Mapper Snap can be used to validate whatever expression value you are trying to use in the custom Snap: