MessagePack serializer implementation for Java / msgpack.org[Java]

Overview

MessagePack for Java

MessagePack is a binary serialization format. If you need a fast and compact alternative of JSON, MessagePack is your friend. For example, a small integer can be encoded in a single byte, and short strings only need a single byte prefix + the original byte array. MessagePack implementation is already available in various languages (See also the list in http://msgpack.org) and works as a universal data format.

MessagePack v7 (or later) is a faster implementation of the previous version v06, and supports all of the message pack types, including extension format.

JavaDoc is available at javadoc.io.

Quick Start

Maven Central Javadoc

For Maven users:

<dependency>
   <groupId>org.msgpack</groupId>
   <artifactId>msgpack-core</artifactId>
   <version>(version)</version>
</dependency>

For sbt users:

libraryDependencies += "org.msgpack" % "msgpack-core" % "(version)"

For gradle users:

repositories {
    mavenCentral()
}

dependencies {
    compile 'org.msgpack:msgpack-core:(version)'
}

Integration with Jackson ObjectMapper (jackson-databind)

msgpack-java supports serialization and deserialization of Java objects through jackson-databind. For details, see msgpack-jackson/README.md. The template-based serialization mechanism used in v06 is deprecated.

For MessagePack Developers Travis CI

msgpack-java uses sbt for building the projects. For the basic usage of sbt, see:

Coding style

Basic sbt commands

Enter the sbt console:

$ ./sbt

Here is a list of sbt commands for daily development:

> ~compile                                 # Compile source codes
> ~test:compile                            # Compile both source and test codes
> ~test                                    # Run tests upon source code change
> ~testOnly *MessagePackTest               # Run tests in the specified class
> ~testOnly *MessagePackTest -- -n prim    # Run the test tagged as "prim"
> project msgpack-core                     # Focus on a specific project
> package                                  # Create a jar file in the target folder of each project
> findbugs                                 # Produce findbugs report in target/findbugs
> jacoco:cover                             # Report the code coverage of tests to target/jacoco folder
> jcheckStyle                              # Run check style
> ;scalafmt;test:scalafmt;scalafmtSbt      # Reformat Scala codes

Publishing

> publishLocal            # Install to local .ivy2 repository
> publishM2               # Install to local .m2 Maven repository
> publish                 # Publishing a snapshot version to the Sonatype repository

> release                 # Run the release procedure (set a new version, run tests, upload artifacts, then deploy to Sonatype)

# If you need to perform the individual release steps manually, use the following commands:
> publishSigned           # Publish GPG signed artifacts to the Sonatype repository
> sonatypeRelease         # Publish to the Maven Central (It will be synched within less than 4 hours)

For publishing to Maven central, msgpack-java uses sbt-sonatype plugin. Set Sonatype account information (user name and password) in the global sbt settings. To protect your password, never include this file in your project.

$HOME/.sbt/(sbt-version)/sonatype.sbt

credentials += Credentials("Sonatype Nexus Repository Manager",
        "oss.sonatype.org",
        "(Sonatype user name)",
        "(Sonatype password)")

Project Structure

msgpack-core                 # Contains packer/unpacker implementation that never uses third-party libraries
msgpack-jackson              # Contains jackson-dataformat-java implementation
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