1. HOL (Hands-on Lab) | Session ID: HOL10286
Highly Loaded Server-Side Multitask Management Systems Based on Java and Redis
Ivan Dubynets
Softarex Technologies Inc,
Head of Department
Vladislav Medvedovsky
Softarex Technologies Inc,
Head of Department
Softarex

2. In presentation
Server-Side Multitask Management Systems Based on Java and Redis overview
Typical architecture of applications based on Redis and Jesque library
Practices
Preparing development environment
Developing first task and worker
Review general ways how to get results back from workers
Conclusion

3. What is Redis?
Redis is a data structure server. It is open-source, networked, in-memory, and stores keys with optional durability.
According to the monthly ranking by DB-Engines.com, Redis is the most popular key-value database.
Redis has also been ranked the #1 NoSQL (and #4 database) in User Satisfaction and Market Presence based on user reviews
The most popular NoSQL database in containers and the #2 NoSQL among Top 50 Developer Tools & Services
The name Redis means Remote Dictionary Server

4. When and where use Redis?
When use Redis:
Need scalable SaaS system
Need control many services
Need store and retrieve data pretty fast
Examples of tasks where can be used Redis:
System for data and devices management in IoT and Industry 4.0 systems
Data processing systems for intensive multitask data processing and storing, for example source code analysis system codeNforcer.com
Multimedia content storage and distribution for e-learning, healthcare, etc

5. Server-Side Multitask Management Systems Based on Java and Redis overview

6. Typical architecture of applications based on Redis and Jesque
Client
Tasks
Redis
Java Worker
Python Worker
C++ Worker

7. Practices

8. Preparing development environment
jdk 1.8
gradle
Netbeans IDE 8.2
Redis server 2.9 or later
git client

9. Getting started clone project template
git clone
build project
./build.sh
run client
./runClient.sh
run server
./runServer.sh

10. Developing first task and worker

11. General steps how to get results back from workers
Save result to the Redis
Push notification by using Redis Pub/Sub feature
Use worker->client callback call over your favorite protocol like TCP, HTTP etc

12. Conclusions
In our lab we have reviewed the typical architecture of applications based on Redis and Jesque library.
We figured out how to create simple workers and tasks.
We also developed several ways how to return results back from the workers.
Example of code can be downloaded here:

13. Thank You for Your Attention
Softarex Technologies, Inc.
Headquarters
901 N. Pitt Street, Suite 320
Alexandria, VA 22314, USA
Tel: +1 (703)