131 lines
5.9 KiB
Markdown
131 lines
5.9 KiB
Markdown
<img src="http://static.jboss.org/hibernate/images/hibernate_logo_whitebkg_200px.png" />
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Hibernate ORM is a library providing Object/Relational Mapping (ORM) support
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to applications, libraries and frameworks.
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It also provides an implementation of the JPA specification, which is the standard Java specification for ORM.
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This is the repository of its source code: see [Hibernate.org](http://hibernate.org/orm/) for additional information.
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[](http://ci.hibernate.org/job/hibernate-orm-master-h2-main/)
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Building from sources
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=========
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The build requires a Java 8 JDK as JAVA_HOME.
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You will need [Git](https://git-scm.com/) to obtain the [source](https://github.com/hibernate/hibernate-orm/).
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Hibernate uses [Gradle](https://gradle.org) as its build tool. See the _Gradle Primer_ section below if you are new to
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Gradle.
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Contributors should read the [Contributing Guide](CONTRIBUTING.md).
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See the guides for setting up [IntelliJ](https://developer.jboss.org/wiki/ContributingToHibernateUsingIntelliJ) or
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[Eclipse](https://developer.jboss.org/wiki/ContributingToHibernateUsingEclipse) as your development environment.
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Check out the _Getting Started_ section in CONTRIBUTING.md for getting started working on Hibernate source.
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Continuous Integration
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=========
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Hibernate makes use of [Jenkins](http://jenkins-ci.org) for its CI needs. The project is built continuous on each
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push to the upstream repository. Overall there are a few different jobs, all of which can be seen at
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[http://ci.hibernate.org/view/ORM/](http://ci.hibernate.org/view/ORM/)
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Gradle primer
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=========
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This section describes some of the basics developers and contributors new to Gradle might
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need to know to get productive quickly. The Gradle documentation is very well done; 2 in
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particular that are indispensable:
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* [Gradle User Guide](https://docs.gradle.org/current/userguide/userguide_single.html) is a typical user guide in that
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it follows a topical approach to describing all of the capabilities of Gradle.
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* [Gradle DSL Guide](https://docs.gradle.org/current/dsl/index.html) is quite unique and excellent in quickly
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getting up to speed on certain aspects of Gradle.
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Using the Gradle Wrapper
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------------------------
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For contributors who do not otherwise use Gradle and do not want to install it, Gradle offers a very cool
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features called the wrapper. It lets you run Gradle builds without a previously installed Gradle distro in
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a zero-conf manner. Hibernate configures the Gradle wrapper for you. If you would rather use the wrapper and
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not install Gradle (or to make sure you use the version of Gradle intended for older builds) you would just use
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the command `gradlew` (or `gradlew.bat`) rather than `gradle` (or `gradle.bat`) in the following discussions.
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Note that `gradlew` is only available in the project's root dir, so depending on your working directory you may
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need to adjust the path to `gradlew` as well.
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Examples use the `gradle` syntax, but just swap `gradlew` (properly relative) for `gradle` if you wish to use
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the wrapper.
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Another reason to use `gradlew` is that it uses the exact version of Gradle that the build is defined to work with.
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Executing Tasks
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------------------------
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Gradle uses the concept of build tasks (equivalent to Ant targets or Maven phases/goals). You can get a list of
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available tasks via
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gradle tasks
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To execute a task across all modules, simply perform that task from the root directory. Gradle will visit each
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sub-project and execute that task if the sub-project defines it. To execute a task in a specific module you can
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either:
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1. `cd` into that module directory and execute the task
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2. name the "task path". For example, in order to run the tests for the _hibernate-core_ module from the root directory you could say `gradle hibernate-core:test`
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Common Java related tasks
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------------------------
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* _build_ - Assembles (jars) and tests this project
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* _buildDependents_ - Assembles and tests this project and all projects that depend on it. So think of running this in hibernate-core, Gradle would assemble and test hibernate-core as well as hibernate-envers (because envers depends on core)
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* _classes_ - Compiles the main classes
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* _testClasses_ - Compiles the test classes
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* _compile_ (Hibernate addition) - Performs all compilation tasks including staging resources from both main and test
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* _jar_ - Generates a jar archive with all the compiled classes
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* _test_ - Runs the tests
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* _publish_ - Think Maven deploy
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* _publishToMavenLocal_ - Installs the project jar to your local maven cache (aka ~/.m2/repository). Note that Gradle
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never uses this, but it can be useful for testing your build with other local Maven-based builds.
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* _eclipse_ - Generates an Eclipse project
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* _idea_ - Generates an IntelliJ/IDEA project (although the preferred approach is to use IntelliJ's Gradle import).
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* _clean_ - Cleans the build directory
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Testing and databases
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=====================
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Testing against a specific database can be achieved in 2 different ways:
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Using the "Matrix Testing Plugin" for Gradle.
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---------------------------------------------
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Coming soon...
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Using "profiles"
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------------------------
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The Hibernate build defines a number of database testing "profiles" in `databases.gradle`. These
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profiles can be activated by name using the `db` build property which can be passed either as
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a JVM system prop (`-D`) or as a Gradle project property (`-P`). Examples below use the Gradle
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project property approach.
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gradle clean build -Pdb=pgsql
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To run a test from your IDE, you need to ensure the property expansions happen.
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Use the following command:
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gradle clean compile -Pdb=pgsql
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_*NOTE : If you are running tests against a JDBC driver that is not available via Maven central (generally due to license nonsense - Oracle, DB2, etc) be sure to add these drivers to your local Maven repo cache (~/.m2/repository) or (better) add it to a personal Maven repo server*_
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