README-gradle.md

To use gradle to build/run the hello-samza project:

1. the project is configured to download and use gradle version 2.3 - on first task execution, it will download the required gradle jars.

2. download/install yarn/kafka/zookeeper:

   $ ./gradlew installGrid

3. build hello-samza job package:

   $ ./gradlew distTar

4. deploy hello-samza project to grid:

   $ ./gradlew deployHelloSamza

5. start the grid (starts up yarn/kafka/zookeeper):

   $ ./gradlew startGrid

6. run the various Samza tasks that are part of hello-samza project:

   $ ./gradlew runWikiFeed $ ./gradlew runWikiParser $ ./gradlew runWikiStats

7. view all the current Kafka topics:

   $ ./gradlew listKafkaTopics

8. view the Kafka topics output by the various Samza tasks:

   $ ./gradlew dumpWikiRaw ( output of Kafka topic scrolls by) CTRL-c

   $ ./gradlew dumpWikiEdits ( output of Kafka topic scrolls by) CTRL-c

   $ ./gradlew dumpWikiStats ( output of Kafka topic scrolls by) CTRL-c

9. stop all the components:

   $ ./gradlew stopGrid

Shortcut: using the 'runWiki*' tasks directly will do steps 3-6 automatically.