How pass named arguments with parameters to aws batch?

Question

Consider piece of AWS batch job definition:

    MyJobDefinition:
        Type: "AWS::Batch::JobDefinition"
        Properties:
            Type: container
            Parameters: {}
            JobDefinitionName: "my-job-name"
            ContainerProperties:
                Command:
                    - "java"
                    - "-jar"
                    - "my-application-SNAPSHOT.jar"
                    - "--param1"
                    - "Ref::param1"
                    - "--param2"
                    - "Ref::param2"

Which result to call:

java -jar my-application-SNAPSHOT.jar --param1 someValue1 --param2 someValue2

How do I change job definition to make it like this? (notice the = sign):

java -jar my-application-SNAPSHOT.jar --param1=someValue1 --param2=someValue2

Please note that Ref::param1 is not cloudformation template params, but aws batch job params.

It is worth mentioning param1 and param2 in the Paremeters json field, so that it is clear, that those do not come from template params. — pubsy, Feb 19 '19 at 22:15
Why don't you pass values as "java -jar my-application-SNAPSHOT.jar someValue1 someValue2"? — Fabio Manzano, Feb 22 '19 at 18:44
Did you end up refactoring the code and passing in the arguments directly instead of using application.properties? — Urmzd, Oct 11 '22 at 20:05

score 0 · Answer 1 · answered Jun 23 '23 at 00:41

In Java, you can pass environment variables using the -D option when running your application from the command line.Replace param1 with the name of your environment variable, and param1_value with the actual value you want to assign to it.

  MyJobDefinition:
            Type: "AWS::Batch::JobDefinition"
            Properties:
                Type: container
                Parameters: {}
       
    
         JobDefinitionName: "my-job-name"
            ContainerProperties:
                Command:
                    - "java"
                    - "-Dparam1=${param1_value}"
                    - "-Dparam2={param2_value}"
                    - "-Dparam3={param2_value}"
                    - "-jar"
                    - "my-application-SNAPSHOT.jar"

For example, if you have an environment variable named DATABASE_URL and you want to pass its value to your Java application, you can use:

java -DDATABASE_URL=jdbc:mysql://localhost:3306/dbname -jar YourApplication.jar

In your Java application, you can access the environment variable value using the System.getProperty() method:

String databaseUrl = System.getProperty("DATABASE_URL");

The databaseUrl variable will contain the value passed from the command line. Hope this helps.

Manish Dash · Answer 2 · 2019-02-26T21:37:57.290

-2

As I understand, AWS batch parameters are substituted by looking for the Ref:: prefix. I could find only one thread where they tried to use a parameter in a larger string and it works.

Given that, the following should work

MyJobDefinition:
    Type: "AWS::Batch::JobDefinition"
    Properties:
        Type: container
        Parameters: {}
        JobDefinitionName: "my-job-name"
        ContainerProperties:
            Command:
                - "java"
                - "-jar"
                - "my-application-SNAPSHOT.jar"
                - "--param1=Ref::param1"
                - "--param2=Ref::param2"

edited Feb 26 '19 at 21:37

answered Feb 25 '19 at 10:20

Manish Dash

2,004
10
20

4

This is wrong. Batch does not support substitution inside strings. Only for complete arguments. – Gil May 28 '19 at 11:26

How pass named arguments with parameters to aws batch?

2 Answers2