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https://github.com/exasol/exasol-java-tutorial

Learn how to extend Exasol with Java
https://github.com/exasol/exasol-java-tutorial

exasol exasol-integration java tutorial

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Learn how to extend Exasol with Java

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README 

          
# Exasol Java tutorial



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If you are a Java developer and you are thinking about extending Exasol with new functionality, this tutorial takes you on a tour around Exasol's interfaces and the libraries we provide.



Not only do you learn how to implement [User Defined Functions (UDF)](https://docs.exasol.com/database_concepts/udf_scripts.htm) in Java, but you also will see how to run automated integration tests.



Topics we are touching in the tutorials:



* Scalar Script UDF (a script with a single input)

* Java code inlined into SQL code

* Java UDFs provided as JAR archives

* Exasol Scripting API for Java

* How to get an Exasol instance you can test against in automated tests

* How to set up tests and prepare test data

* How to check the results from SQL queries in a compact and readable way



## Tutorials



### Hello World!



Start your journey with the obligatory [hello world](hello-world-tutorial/doc/hello_world.md) tutorial to learn the basics of defining an inline Java extension that can be called from SQL.



## Markdown Statistics as User Defined Function



Up your game with a full-blown automated integration test that exercises a more complex Java extension that gets [statistics from Markdown](markdown-statistics-tutorial/doc/mdstats.md) text stored in an Exasol table. Learn to package the installation in a JAR archive in the course of this tutorial.



## TLS Tutorial



Setting up TLS is all but trivial in some scenarios, so a series of articles and some software examples guide you through the process.



1. [Introduction to TLS](tls-tutorial/doc/tls_introduction.md)

2. [TLS with Exasol (theoretical part)](tls-tutorial/doc/tls_with_exasol.md)

3. [Using Your Own Certificates](tls-tutorial/doc/use_your_own_certificate.md) to run `IMPORT` from MySQL into Exasol

4. [TLS in User Defined Functions (UDFs)](tls-tutorial/doc/tls_in_udfs.md)



## Java Testing Tutorial



* [Introduction](testing-tutorial/doc/introduction.md)

* [Tests are an Executable Specification](testing-tutorial/doc/test_are_an_executable_specification.md)

* [Automatic Testing](testing-tutorial/doc/automatic_testing.md)

* [Test Driven Design and Behavior Driven Design](testing-tutorial/doc/tdd/tdd_and_bdd.md)

* [Multiple Asserts in one Test Case](testing-tutorial/doc/multiple_asserts_in_one_test_case.md)

* [Dealing with Randomness](testing-tutorial/doc/dealing_with_randomness.md)



## Additional Information



* [Changelog](doc/changes/changelog.md)

* [Dependencies](dependencies.md)