nashtech-labs / lagom-scala-sbt-standalone

A basic example of building a Lagom Scala project to run outside of the Lightbend Production Suite (aka ConductR).

lagom-scala-sbt-standalone

A basic example of building a Lagom project (in Scala) to run outside of the Lightbend Production Suite (aka ConductR). This was initially created from the lagom-scala template (sbt new lagom/lagom-scala.g8), with the following changes:

• Set lagomKafkaEnabled & lagomCassandraEnabled to false.
• Added a static service location to hello-impl for cas_native (the Cassandra server).
• Added a static service location to hello-stream-impl for Kafka service (unnamed).

To test this:

1. Open a terminal and clone the repository to your workstation (git clone https://github.com/knoldus/lagom-scala-sbt-standalone.git)
2. cd lagom-scala-sbt-standalone
3. sbt to enter the sbt console
4. project knol-impl to select knol-impl module.
5. dist (from the sbt prompt) to create distribution package.
6. Press control-C to exit sbt console.
7. Start Cassandra Server - https://www.datastax.com/2012/01/getting-started-with-cassandra
8. Start Kafka Server - https://kafka.apache.org/quickstart#quickstart_download
9. cd lagom-scala-sbt-standalone/knol-impl/target/universal
10. unzip knol-impl-0.1.0-SNAPSHOT.zip
11. Set the following environment varaibles:
    1. export APP_LIB=knol-impl-0.1.0-SNAPSHOT/lib
    2. export APP_CLASSPATH=$APP_LIB/*
    3. export JAVA_OPTS=""
    4. export JMX_CONFIG=""
    5. export PLAY_SECRET=none
    6. export CONFIG_FILE=/path/to/lagom-scala-sbt-standalone/knol-impl/src/main/resources/application.conf
    7. export CONFIG="-Dplay.crypto.secret=$PLAY_SECRET -Dlagom.cluster.join-self=off -Dorg.xerial.snappy.use.systemlib=true -Dconfig.file=$CONFIG_FILE"
    8. export PLAY_SERVER_START="play.core.server.ProdServerStart"
12. At last run the Lagom service - java -cp "$APP_CLASSPATH" $JAVA_OPTS $JMX_CONFIG $CONFIG $PLAY_SERVER_START

This runs each of the services as single-node clusters.

You can press control-C to exit the services.