Nussknacker Ignite Quickstart

This is slightly modified version of Nussknacker's quickstart.

It shows how to use Apache Ignite in several cases of Nussknacker deployment:

• aggregation - persist large aggregates collected while processing input records
• enrichment - enrich input records with detailed data using Ignite as super-fast cache

Running

Prerequisites

• docker-compose
• jq

To run end-to-end scenarios, just run:

./testAggregates.sh

for aggregation scenario, or

./testEnrichment.sh

for enrichment.

To cleanup Docker stuff after running end-to-end tests run ./cleanup.sh.

Detailed setup

You can just run ./start.sh to pull and start required docker images.

After doing it, you can access following components:

• Nussknacker - user/password: admin/admin
• Apache Flink UI
• Apache NiFi
• Grafana
• AKHQ

Ignite

Ignite doesn't expose any UI to access, you can connect to it using JDBC or built-in sqlline tool:

#> docker exec -it nussknacker_ignite bash
bash-4.4# /opt/ignite/apache-ignite/bin/sqlline.sh -u 'jdbc:ignite:thin://ignite' -n ignite -p ignite
sqlline version 1.9.0
0: jdbc:ignite:thin://ignite> select * from customer;
+----------+---------------+----------+
| clientId |     name      | category |
+----------+---------------+----------+
| client1  | John Doe      | STANDARD |
| client2  | Robert Wright | GOLD     |
| client3  | Юрий Шевчук   | PLATINUM |
| client4  | Иосиф Кобзон  | STANDARD |
+----------+---------------+----------+
4 rows selected (0.036 seconds)
0: jdbc:ignite:thin://ignite> 

There is also helper script to query aggregates table:

#> ./testData/aggregates/queryIgniteAggregates.sh
1/1          SELECT * FROM AGGREGATES ORDER BY "eventDate" DESC;
+----------+-----------------------+--------+
| clientId |       eventDate       | amount |
+----------+-----------------------+--------+
| client1  | 2022-01-10 00:00:00.0 | 158    |
| client2  | 2022-01-10 00:00:00.0 | 175    |
| client3  | 2022-01-10 00:00:00.0 | 190    |
| client4  | 2022-01-10 00:00:00.0 | 192    |
| client5  | 2022-01-10 00:00:00.0 | 188    |
+----------+-----------------------+--------+
5 rows selected (0.061 seconds)
sqlline version 1.9.0

NiFi

In aggregates scenario, updated aggregate records are published to dailyAggregates topic. In order to populate this data to Ignite, a simple NiFi flow is provided:

This PutIgniteRecord processor is a part of our nifi-extensions project.

Scripts

Here's a brief summary of scripts located in testData directory, which are used in end-to-end scenarios:

• createIgniteTables.sh - creates Ignite tables and populates with basic data
• importAndDeploy.sh <scenario_file> - imports Nussknacker's scenario from scenario_file and deploys it to Flink
• sendTestTransactions.sh <count> - sends random count transactions to input topic

What's next?

More advanced usages of Nussknacker image (available properties and so on) you can find out on our Installation guide

Contributing

Please send your feedback on our mailing list. Issues and pull request can be reported on our project page