Question 18229 in Amazon Web Sevices Question posted in
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How do I run zipped file created for lambda function locally? – Amazon Web Sevices

How do I run a zipped java file, created for lambda, locally?

When a zip is created by following the link
https://docs.aws.amazon.com/lambda/latest/dg/java-package.html

We can upload the zip to lambda for running application on it.

How do I run the zip if I need to test the functions locally.
By unzipping the same zipped file, I can see java classes compiled into *.class files.

When I ran java MainClass it is throwing

Error: Unable to initialize main class MainClass
Caused by: java.lang.NoClassDefFoundError: org/redisson/client/codec/Codec

I am using redisson as a dependency here.

Note: I can create fatJar or other methods to test the function locally but I need to re use how lambda would run this zip.

I don’t want to run the lambda function locally.

I want to run the actual code, using the same zip created from gradle zip task.

Question can be worded as "How do I run java application from zip. The zip is created from a gradle task"

I am using gradle to build and make zip file

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2

Answers


  1. Chosen as BEST ANSWER
    0

    After zipping the java application with https://docs.gradle.org/current/dsl/org.gradle.api.tasks.bundling.Zip.html.

    All we need is to unzip the zipped file and pass in location of jars as class path.


  2. 0

    The only way to debug/test AWS lambdas locally is by using AWS SAM in debug mode

    sam local invode -d <debug port, normally 5858> <function logical id>

    You can’t just run the jar file. Have a look at the aws sam documentation. https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/serverless-sam-cli-using-debugging.html

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