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73 lines
2.6 KiB
Markdown
73 lines
2.6 KiB
Markdown
## Querydsl
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Querydsl is a framework which enables the construction of type-safe SQL-like queries for multiple backends including JPA, MongoDB and SQL in Java.
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Instead of writing queries as inline strings or externalizing them into XML files they are constructed via a fluent API.
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**Getting started**
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Use these tutorials to get started
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* [Querying JPA](http://www.querydsl.com/static/querydsl/latest/reference/html/ch02.html#jpa_integration)
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* [Querying SQL](http://www.querydsl.com/static/querydsl/latest/reference/html/ch02s03.html)
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* [Querying JDO](http://www.querydsl.com/static/querydsl/latest/reference/html/ch02s02.html)
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* [Querying Mongodb](http://www.querydsl.com/static/querydsl/latest/reference/html/ch02s06.html)
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* [Querying Lucene](http://www.querydsl.com/static/querydsl/latest/reference/html/ch02s04.html)
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* [Querying Collections](http://www.querydsl.com/static/querydsl/latest/reference/html/ch02s07.html)
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**Examples**
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Querydsl example projects
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* [Querydsl JPA example](https://github.com/mysema/querydsl-jpa-example)
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* [Querydsl SQL example](https://github.com/mysema/querydsl-sql-example)
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**Support**
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Free support is provided in the Querydsl Google Group https://groups.google.com/forum/#!forum/querydsl
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**How to build**
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Querydsl provides releases via public Maven repositories, but you can build the sources also yourself like this
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cd querydsl-root
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mvn -DskipTests=true clean install
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For more information visit the project homepage at http://www.querydsl.com/.
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**Vagrant/Puppet setup**
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For running tests, a Vagrant/Puppet setup is provided. It is based on Ubuntu 12.04 and comes with the following databases:
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* Oracle Express Edition 11g
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* PostgreSQL 9.1.10
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* MySQL 5.5.34
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* Cubrid 9.2
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You will need to install [VirtualBox], [Puppet], [Vagrant], the [vagrant-vbguest] plugin and [librarian-puppet]. You will also need to
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download the Oracle XE 11g installer file (```oracle-xe-11.2.0-1.0.x86_64.rpm.zip```) manually and
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place it in the ```devops``` directory.
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To launch the virtual machine:
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```
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$> cd devops
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devops$> librarian-puppet install
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devops$> vagrant up
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```
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All of the databases' default ports are forwarded to the host machine. See the Vagrantfile for details.
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**How to contribute**
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GitHub pull requests are the way to contribute to Querydsl.
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If you are unsure about the details of a contribution, ask on the Querydsl Google Group or create a ticket on GitHub.
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[VirtualBox]: https://www.virtualbox.org/
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[Vagrant]: http://www.vagrantup.com/
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[Puppet]: http://puppetlabs.com/
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[vagrant-vbguest]: https://github.com/dotless-de/vagrant-vbguest
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[librarian-puppet]: http://librarian-puppet.com/
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