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SHA-256 checksums for official version 0.8.2b:

ab92c3b6fc5a9b4230606625954bf6e0ae62d37ecc3477254dcce0a50a1334a6  BWAPI4J-0.8.2b.jar
e0a52dcae291151692cbbad51518b3d07fd5c3e9e94e2ffd20b093754b2e1799  BWAPI4J-0.8.2b-javadoc.jar
6192b65fafbf702ea380fbfad7c6a0a71d25e79de4af2cb0475378dc9bea2146  BWAPI4J-0.8.2b-sources.jar

BWAPI4J

This is a Java wrapper for BWAPI. It is intended to replace older projects such as BWMirror and JNIBWAPI.

BWAPI4J is compatible with the official BW 1.16.1 on Windows as well as OpenBW on Windows or Linux.

This project consists of two main parts:

1. The Java project BWAPI4J containing all Java classes used by your bot.
2. The C++ project BWAPI4JBridge containing C++ code required for BWAPI4J to interact with BW.

Notes:

• This is a development version and breaking changes can occur at any time.
• To develop a BWAPI4J bot, you will need a BWAPI4J.jar that also contains at least one bridge binary for the target platform.
• A pre-compiled release library JAR is available on our releases page and also via the AppVeyor link at the top of this README.

Why BWAPI4J?

BWAPI4J was inspired by both BWMirror and JNIBWAPI. It strives to combine the advantages of both while eliminating some weaknesses.

The main advantages of BWAPI4J are:

• Speed: BWAPI4J minimizes the amount of JNI calls and caches data likely to be queried every frame on the Java-side using a single large array copy.
• Ease of debugging: Automatically generated code is hard to debug, especially if c++ pointers are cached Java-side and there is no way to look up the values from a Java debugger. BWAPI4J is coded manually and caches relevant game data Java-side, rather than just pointers.
• Feature-completeness: Other bridges either do not contain the full set of features or are prone to nasty bugs that lead to JVM crashes, in particular in conjunction with libraries such as BWTA. BWAPI4J aims to provide at least a rudimentary exception handling even for the C++ routines, such that bugs can be investigated.

The fact that BWAPI4J is typed may or may not be seen as an advantage. Future versions will provide a typed and a non-typed interface.

Last but not least: BWAPI4J is fully compatible with OpenBW and therefore can be run on Linux (natively, no Wine required) at much greater speeds than the original BW.

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Getting Started

If you would like to build the Java and C++ binaries yourself, see the "BWAPI4J" and "BWAPI4JBridge" sections. Otherwise, obtain a pre-compiled copy of our latest official version from our releases page or from the AppVeyor link at the top of this README and import it into your bot project. Take a look at the very basic example bots TestListenerBwem.java or TestListener.java.

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BWAPI4J

Required JDK Version

JDK 1.8 or later is required. 32-bit is required when using original BW. 64-bit is required when using OpenBW.

Cloning the repository

git clone https://github.com/OpenBW/BWAPI4J.git
cd BWAPI4J
git submodule update --init --recursive

Compiling the BWAPI4J library JAR using Gradle

Note: These steps will not build the bridge. You will need to compile or obtain the bridge in order for the Gradle task shadowJar to be effective. See the BWAPI4JBridge section for more details.

Build Steps

Navigate to the BWAPI4J/BWAPI4J/ directory and run the following command:

./gradlew clean build sourcesJar javadocJar shadowJar

The resulting JARs will be found in the BWAPI4J/BWAPI4J/build/libs/ directory which can be imported into your IDE to develop a BWAPI4J bot.

Adding the JAR to an existing Maven project

This step is optional. You may manually import the JARs from the previous step into any IDE.

Note: If a version number is appended to the JAR filename, you must also add it to the JAR filenames in following example command.

mvn install:install-file \
    -Dfile=build/libs/BWAPI4J.jar \
    -Djavadoc=build/libs/BWAPI4J-javadoc.jar \
    -Dsources=build/libs/BWAPI4J-sources.jar \
    -DgroupId=org.openbw \
    -DartifactId=bwapi4j \
    -Dversion=0.1-SNAPSHOT  \
    -Dpackaging=jar

Testing your development environment

The Smoke Test

The smoke test will test your current setup and display errors or exceptions if something went wrong. If the smoke test fails, usually you will have a difficult time developing and deploying your bot.

Running the Smoke Test with Eclipse

Right-click the project and choose Run as... -> JUnit Test.

Running the Smoke Test with another IDE

Navigate to BWAPI4J/BWAPI4J/src/test/java/org/openbw/bwapi4j/MainTest.java and run the smokeTest manually.

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JVM options

bwapi4j.extractDependencies

By default, BWAPI4J will extract missing bridge dependencies to the current working directory. This can be overridden by specifying the value false to the JVM. E.g.:

java -Dbwapi4j.extractDependencies=false -jar MyBot.jar

bwapi4j.bridgeType

By default, BWAPI4J will use the Vanilla BW bridge on Windows and the OpenBWAPI4JBridge on Linux. This can be overridden by specifying vanilla or openbw to the JVM. E.g.:

java -Dbwapi4j.bridgeType=vanilla -jar MyBot.jar

or

java -Dbwapi4j.bridgeType=openbw -jar MyBot.jar

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Dependencies for running a BWAPI4J bot

• The bridge should be accessible via a library path known by the system.
  • On Windows, the path to the bridge can be added to the PATH environment variable.
  • On Linux, the path to the bridge can added to the LD_LIBRARY_PATH environment variable.
• If the bridge is not found in a known library path, the bot will search the current working directory.

Original BW on Windows

Prerequisites:

• BW 1.16.1
• BWAPI 4.4.0
• VC++ Redist 2017
• Windows 7 or higher

OpenBW

Prerequisites:

• A compiled and working version of OpenBW.
• The original BW does not need to be installed. Only the following three BW files are required (available for free). Copy them to your root project directory (case-sensitive): BrooDat.mpq, StarDat.mpq, Patch_rt.mpq
• At least one Melee map. For example, Fighting Spirit from the SSCAIT map pack.
• Copy bwapi-data/bwapi.ini.sample to bwapi-data/bwapi.ini and configure as usual. See https://github.com/bwapi/bwapi/wiki/Configuration
• Set the ai = variable in bwapi.ini to point to the BWAPI4J bridge module. E.g.

ai = ..\BWAPI4JBridge\Release\OpenBWAPI4JBridge.dll

or

ai = ../BWAPI4JBridge/Release/libOpenBWAPI4JBridge.so

OpenBW for Linux

• In addition to libOpenBWAPI4JBridge.so, add the paths of the following files to the LD_LIBRARY_PATH environment variable or copy them to a system library directory such as /usr/lib/ or /usr/local/lib/

libOpenBWData.so
libBWAPILIB.so
libBWAPI.so

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BWAPI4JBridge (C++)

The bridge is compounded into three types that share most of the same code:

Type	BW Version	Platform	Binary Name
vanilla	BW 1.16.1	Windows	BWAPI4JBridge.dll
openbw	OpenBW	Windows	OpenBWAPI4JBridge.dll
openbw	OpenBW	Linux	libOpenBWAPI4JBridge.so

Note: Binaries have been removed from this repository and will be shipped with official releases. If one of the bridges is not working for you, please try compiling it yourself with the steps below or submit a GitHub Issue. We also have an AppVeyor download link at the top of this readme for the Vanilla BW Windows bridge + BWAPI4J library.

Prerequisites

• CMake 3.1 or higher

Windows-specific

• Visual Studio 2017

Linux-specific

• g++ 7.x or higher (needs to support most C++17 features)
• A working version of OpenBW (will be compiled automatically with an OpenBW bridge)

Gradle Tasks for building the bridges

The following table outlines the Gradle tasks used for building a specific bridge.

Type	Platform	Gradle Task
vanilla	Windows	buildVanillaBridgeForWindows
openbw	Windows	buildOpenBWBridgeForWindows
openbw	Linux	buildOpenBWBridgeForLinux

Examples:

gradlew.bat buildVanillaBridgeForWindows

gradlew.bat buildOpenBWBridgeForWindows

./gradlew buildOpenBWBridgeForLinux

Note: When building the bridge in Windows, it is recommended to use gradlew.bat in a native Windows terminal. The terminal must have access to Windows environment variables and the ability to load a Visual Studio environment.

Packaging the bridge with the BWAPI4J library JAR

The bridge needs to be built before it is packaged via shadowJar. Use one of the appropriate Gradle tasks listed above to build the bridge, then use the following command:

./gradlew shadowJar