Undocumented behavior of Topic Subscription with ShoppingCart-Java about lagom-samples HOT 4 CLOSED

Hi @gabizou, this is the first time we hear of such an issue. Would you be able to provide a reproducer?

from lagom-samples.

Would you be able to provide a reproducer?

I simply cloned the lagom/shopping-cart-java sample:

• Importing the maven pom.xml to IntelliJ
• Running the necessary docker-compose file for the services (Kafka, zookeeper, Postgres)
• Running mvn lagom:runAll with the debugger and a breakpoint at the flow subscription as line linked
• Curl curl http://localhost:9000/inventory/456 and notice the result is still 0
• Curl curl -H "Content-Type: application/json" -d 4 -X POST http://localhost:9000/inventory/456 to add 4 inventory
• Run curl -H "Content-Type: application/json" -d '{"itemId": "456", "quantity": 2}' -X POST http://localhost:9000/shoppingcart/123 to add 2 of 456 to cart
• Verify curl http://localhost:9000/inventory/456 and the inventory is still 4.......
• Wait several minutes for the debugger to actually receive the first event from the shopping cart message to update the inventory side (varies, but occasionally can be 4 minutes, sometimes up to 10 minutes, and then after this initial delay, most updates are relatively within a second).

from lagom-samples.

I don't remember the details, but I think you need to checkout the shopping cart before the inventory is updated.

curl -X POST http://localhost:9000/shoppingcart/123/checkout

from lagom-samples.

So I did a re-test with the curl to checkout, turns out it works. My underlying problem turns out to be that akka/akka-persistence-cassandra#867 is giving my development environment the slow-start up that I'm observing.

from lagom-samples.