https://github.com/blosc/jblosc2

Java interface for Blosc2 library
https://github.com/blosc/jblosc2

compression java performance

Last synced: about 1 month ago
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Java interface for Blosc2 library

• Host: GitHub
• URL: https://github.com/blosc/jblosc2
• Owner: Blosc
• Created: 2017-06-06T11:50:23.000Z (almost 8 years ago)
• Default Branch: master
• Last Pushed: 2017-06-13T08:28:08.000Z (almost 8 years ago)
• Last Synced: 2024-10-29T14:48:54.886Z (7 months ago)
• Topics: compression, java, performance
• Language: Java
• Size: 96.7 KB
• Stars: 6
• Watchers: 7
• Forks: 3
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# JBlosc2

| **Travis CI** | **Appveyor** |

|---------------|--------------|

|[![Build Status](https://travis-ci.org/Blosc/JBlosc2.svg?branch=master)](https://travis-ci.org/Blosc/JBlosc2) |[![Build status](https://ci.appveyor.com/api/projects/status/k7ler2n0ytmbjrw6?svg=true)](https://ci.appveyor.com/project/FrancescAlted/jblosc2)|

Java interface for Blosc2

The purpose of this project is to create a Java interface for the compressor Blosc. JNA has been chosen as the mechanism to communicate with the Blosc2 shared library.

A simple example extracted from the unit tests:

```java

    int SIZE = 100 * 100 * 100;

    ByteBuffer ibb = ByteBuffer.allocateDirect(SIZE * PrimitiveSizes.DOUBLE_FIELD_SIZE);

    for (int i = 0; i < SIZE; i++) {

        ibb.putDouble(i);

    }

    JBlosc2 jb2 = new JBlosc2();

    ByteBuffer obb = ByteBuffer.allocateDirect(ibb.limit() + JBlosc2.OVERHEAD);

    jb2.compress(5, Shuffle.BYTE_SHUFFLE, PrimitiveSizes.DOUBLE_FIELD_SIZE, ibb, ibb.limit(), obb, obb.limit());

    ByteBuffer abb = ByteBuffer.allocateDirect(ibb.limit());

    jb2.decompress(obb, abb, abb.limit());

    jb2.destroy();

    assertEquals(ibb, abb);

```

## Installation

First of all, you need to install the Blosc2 library (visit https://github.com/Blosc/c-blosc2 for more details), in short, if you already have CMake, executing the following commands should do the work:

```bash

git clone https://github.com/Blosc/c-blosc2.git

cd c-blosc2

mkdir build

cd build

cmake -DCMAKE_GENERATOR_PLATFORM=x64 ..

cmake --build . --target install

```

Tipically in Linux/Unix the Blosc2 library is installed in your system search path, however, in Windows you will need to add blosc.dll to your PATH (```copy "c:\Program Files (x86)\blosc\lib\blosc.dll" c:\Windows\System32```).

Also check that your OS, Java Virtual Machine and Blosc library are using the same architecture (either 32 or 64 bit).

Build: ```mvn clean install```

If you want to use it in another maven project, after installing it you can use it as a dependency like this:

```xml

		

			

				org.blosc

				jblosc2

				0.0.1-SNAPSHOT

			

		

```