# Build Portability Environment Building the Software Build Targets Using Maven 2 Translating Providing Patches ## Portability This database is written in Java and therefore works on many platforms. It can also be compiled to a native executable using GCJ. ## Environment A Java Runtime Environment (JRE) version 1.4 or higher is required to run this database. To build the database executables, the following software stack was used. Newer version or compatible software works too. Mac OS X and Windows XP Sun JDK Version 1.4, 1.5, and 1.6 Eclipse Version 3.4 Eclipse Plugins: Subclipse 1.4.6, EclEmma Java Code Coverage 1.3.0, Eclipse Checkstyle Plug-in 4.4.2 Mozilla Firefox 3.0 OpenOffice 3.0 NSIS 2.38 (Nullsoft Scriptable Install System) Maven 2.0.9 YourKit Java Profiler ## Building the Software You need to install a JDK, for example the Sun JDK version 1.4, 1.5 or 1.6. On the command line, go to the directory h2 and execute the following command:
    build -?
For Linux and OS X, use `./build.sh` instead of `build`. You will get a list of targets. If you want to build the jar file, execute (Windows):
    build jar
### Switching the Source Code By default the source code uses Java 1.6 features, however Java 1.4 and 1.5 are supported as well. To disable Java 1.6 specific features, run:
    build switchSource
## Build Targets The build system can generate smaller jar files as well. The following targets are currently supported: jarClient: Create the h2client.jar. This only contains the remote JDBC implementation. jarSmall: Create the file h2small.jar. This only contains the embedded database. Debug information is disabled. jarJaqu: Create the file h2jaqu.jar. This only contains the JaQu (Java Query) implementation. All other jar files do not include JaQu. javadocImpl: Create the Javadocs of the implementation. To create the h2client.jar file, go to the directory h2 and execute the following command:
    build jarClient
## Using Maven 2 ### Using a Central Repository You can include the database in your Maven 2 project as a dependency. Example:
    <dependency>
        <groupId>com.h2database</groupId>
        <artifactId>h2</artifactId>
        <version>${version}</version>
    </dependency>
New versions of this database are first uploaded to http://hsql.sourceforge.net/m2-repo/ and then automatically synchronized with the main maven repository; however after a new release it may take a few hours before they are available there. ### Using Snapshot Version To build a 'snapshot' H2 .jar file and upload it the to the local Maven 2 repository, execute the following command:
    build mavenInstallLocal
Afterwards, you can include the database in your Maven 2 project as a dependency:
    <dependency>
        <groupId>com.h2database</groupId>
        <artifactId>h2</artifactId>
        <version>1.0-SNAPSHOT</version>
    </dependency>
## Translating The translation of this software is split into the following parts: H2 Console: src/main/org/h2/server/web/res/_text_*.properties Error messages: src/main/org/h2/res/_messages_*.properties Web site: src/docsrc/text/_docs_*.utf8.txt To translate the H2 Console, start it and select Options / Translate. The conversion between UTF-8 and Java encoding (using the \u syntax), as well as the HTML entities (&#..;) is automated by running the tool PropertiesToUTF8. The web site translation is automated as well, using `build docs`. ## Providing Patches If you like to provide patches, please consider the following guidelines to simplify merging them: Only use Java 1.4 features (do not use Java 1.5 or 1.6) (see Environment). Follow the coding style used in the project, use Checkstyle (see above) to check the coding style. The checkstyle configuration is in `src/installer/checkstyle.xml`. Please provide test cases and integrate them into the test suite. For Java level tests, see `src/test/org/h2/test/TestAll.java`. For SQL level tests, see `src/test/org/h2/test/test.in.txt` or `testSimple.in.txt`. The test cases should cover at least 90% of the changed and new code; use a code coverage tool to verify that (see above). Verify that you did not break other features: Run the test cases by executing `build test`. Provide end user documentation if required (`src/docsrc/html/*`). Document grammar changes in `src/main/org/h2/res/help.csv` Provide a change log entry (`src/docsrc/html/changelog.html`). Verify the spelling using `build spellcheck`. If required add the new words to `src/tools/org/h2/build/doc/dictionary.txt`. Verify the formatting using `build docs` and `build javadoc`. Submit patches as .patch files (compressed if big). To create a patch, use for example Eclipse Team/Create Patch.