Hi Tirthankar,
You probably need to set up the Object Gateway classpath correctly.

I've just got it working as follows:

1. Get the proper .jar files

I've copied them from the jgw container:

docker cp jgw:/jgw/FirstDemo.jar shared/ 
docker cp jgw:/jgw/gson-2.8.5.jar shared/     
docker cp jgw:/jgw/intersystems-gateway-3.1.0.jar shared/
docker cp jgw:/jgw/intersystems-jdbc-3.1.0.jar shared/    
docker cp jgw:/jgw/intersystems-utils-3.1.0.jar shared/

You can also generate your .jar files, just make sure it contains all the required dependencies.

2. Set up your local Object Gateway:

• IP address: 127.0.0.1
• Port: 4444
• ClassPath: /shared/FirstDemo.jar:/shared/gson-2.8.5.jar:/shared/intersystems-utils-3.1.0.jar

After that, start your Object Gateway, you should see something like:
Executing O.S. command: java -Xrs -classpath /shared/FirstDemo.jar:/shared/gson-2.8.5.jar:/shared/intersystems-utils-3.1.0.jar:/usr/irissys/dev/java/lib/JDK18/intersystems-gateway-3.1.0.jar:/usr/irissys/dev/java/lib/JDK18/intersystems-jdbc-3.1.0.jar com.intersystems.gateway.JavaGateway 4444 "" "" 127.0.0.1 ""

3. Modify some of the PEX components in the production, e.g. FirstOperation:

• Gateway Host: localhost
• Gateway Port: 4444

That should work.

Hi,

It seems the code was using a deprecated image name.
I've just updated it to use intersystemsdc/jgw.

Please, try again.