java - how to provide path of file from jar to other function

Question

I am creating an application (hive udf) and for that I am creating an fat jar with all the dependencies. As this is going to be distributed over multiple nodes I need to pack my property files in jar as well.

Problem One of the function I am calling from another jar needs a parameter, a property file path. I have packed this property file inside jar. and passing just the name. However, it's complaining that file not found.

Code:

  c = new ABC("classification.props");

Function inside ABC class that read the property file

public static Properties getProperties(String propFile) {
    Properties props = new Properties();

    try {
        props.load(new FileInputStream(propFile));
        return props;
    } catch (IOException var3) {
        var3.printStackTrace();

    }
}

This ABC is coming from another jar. however I am creating a fat jar so shouldn't matter. classification.props is in the root folder of application.

Is the complaining code trying to load the properties file from the filesystem, or from the class path? — dnault, Jun 04 '20 at 21:23

score 0 · Answer 1 · answered Jun 04 '20 at 21:48

The getProperties method is looking for a file on the filesystem. That's not where your file is -- your file is in the JAR.

If you can change the getProperties` method, you can tell it to read the file as a class path resource instead.

How do I load a file from resource folder?

If you can't modify the getProperties method, you can copy the properties to the filesystem (load it as a class path resource using the technique in the linked answer, and then write to to a temp directory).

java - how to provide path of file from jar to other function

1 Answers1