Hivemq-community-edition
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= HiveMQ Community Edition
image:https://maven-badges.herokuapp.com/maven-central/com.hivemq/hivemq-community-edition-embedded/badge.svg["Maven Central",link="https://maven-badges.herokuapp.com/maven-central/com.hivemq/hivemq-community-edition-embedded"] image:https://jitpack.io/v/hivemq/hivemq-community-edition.svg["JitPack",link="https://jitpack.io/#hivemq/hivemq-community-edition"] image:https://javadoc.io/badge2/com.hivemq/hivemq-community-edition-embedded/javadoc.svg["javadoc",link=https://javadoc.io/doc/com.hivemq/hivemq-community-edition-embedded] image:https://img.shields.io/github/actions/workflow/status/hivemq/hivemq-community-edition/check.yml?branch=master[GitHub Workflow Status (with branch),link=https://github.com/hivemq/hivemq-community-edition/actions/workflows/check.yml?query=branch%3Amaster]
HiveMQ CE is a Java-based open source MQTT broker that fully supports MQTT 3.x and MQTT 5.
HiveMQ CE is the foundation of the HiveMQ enterprise-connectivity and messaging platform and implements all MQTT features. This project is the technical core of many large MQTT deployments and is now available as open source software under the Apache 2 license.
- Website: https://www.hivemq.com/
- Documentation: https://github.com/hivemq/hivemq-community-edition/wiki
- Community Forum: https://community.hivemq.com/
- Contribution guidelines: link:CONTRIBUTING.adoc[Contributing.adoc]
- License: The source files in this repository are made available under the link:LICENSE[Apache License Version 2.0].
== Features
- All MQTT 3.1, 3.1.1 and MQTT 5.0 features
- MQTT over TCP, TLS, WebSocket and Secure WebSocket transport
- Java Extension SDK for: Authentication Authorization Client Initializers MQTT Packet Interceptors ** Interacting with Publishes, Retained Messages, Clients and Subscriptions
- Running on Windows, Linux and MacOS (Linux is recommended)
- Embedded Mode
HiveMQ CE is compatible with all MQTT 3 and MQTT 5 clients, including Eclipse Paho and https://github.com/hivemq/hivemq-mqtt-client[HiveMQ MQTT Client].
== Documentation
The documentation for the HiveMQ CE can be found https://github.com/hivemq/hivemq-community-edition/wiki[here].
MQTT Resources
- https://www.hivemq.com/mqtt-essentials/[MQTT Essentials]
- https://www.hivemq.com/mqtt-5/[MQTT 5 Essentials]
== HiveMQ Community Forum
The ideal place for questions or discussions about the HiveMQ Community Edition is our brand new https://community.hivemq.com/[HiveMQ Community Forum].
== How to Use
=== Quick Start
- Download the latest https://github.com/hivemq/hivemq-community-edition/releases/download/2024.8/hivemq-ce-2024.8.zip[HiveMQ CE binary package].
- Unzip the package.
- Run the run.sh (Linux/OSX) or run.bat (Windows) in the bin folder of the package.
[source,bash]
cd hivemq-ce-
bin/run.sh
[IMPORTANT]
At least Java version 11 is required to run HiveMQ CE.
If you are in doubt, you can check the installed Java version by entering java -version on your command line.
You can now connect MQTT clients to <ip address>:1883.
[CAUTION] If you want to connect devices on external networks to HiveMQ CE, please make sure your server is reachable from those networks and the required ports (default: 1883) are accessible through your firewall.
=== Just in Time Builds
Just in time builds for current branches on this repository and for specific commits are available https://hivemq.github.io/nightly-builds/[here].
=== Run with Docker
All releases as well as the current state of the master branch are available in the https://hub.docker.com/r/hivemq/hivemq-ce[hivemq/hivemq-ce] repository on DockerHub.
To execute this image, simply run the following command:
[source,bash]
docker run --name hivemq-ce -d -p 1883:1883 hivemq/hivemq-ce
To change the default log level you can set the environment variable HIVEMQ_LOG_LEVEL when running the container:
[source,bash]
docker run --name hivemq-ce -e HIVEMQ_LOG_LEVEL=INFO -d -p 1883:1883 hivemq/hivemq-ce
=== Building from Source
==== Building the Binary Package
Check out the git repository and build the binary package.
[source,bash]
git clone https://github.com/hivemq/hivemq-community-edition.git
cd hivemq-community-edition
./gradlew hivemqZip
The package hivemq-ce-<version>.zip is created in the sub-folder build/distributions/.
==== Building the Docker Image
Check out the git repository and build the Docker image.
[source,bash]
git clone https://github.com/hivemq/hivemq-community-edition.git
cd hivemq-community-edition
docker/build.sh
The Docker image hivemq/hivemq-ce:snapshot is created locally.
For further development instructions see the link:CONTRIBUTING.adoc[contribution guidelines].
=== Embedded Mode
HiveMQ Community Edition offers an embedded mode and a programmatic API for integrating with Java/Java EE software.
==== Gradle
If you use Gradle, include the following code in your build.gradle(.kts) file.
[source,groovy]
dependencies { implementation("com.hivemq:hivemq-community-edition-embedded:2024.8") }
==== Maven
If you use Maven, include the following code in your pom.xml file.
[source,xml]
NOTE: You must set the compiler version to 11 or higher.
==== Usage
Entry into the embedded mode is done with the com.hivemq.embedded.EmbeddedHiveMQBuilder.
[source,java]
public class Main {
public static void main(String[] args) {
final EmbeddedHiveMQBuilder embeddedHiveMQBuilder = EmbeddedHiveMQ.builder()
.withConfigurationFolder(Path.of("/path/to/embedded-config-folder"))
.withDataFolder(Path.of("/path/to/embedded-data-folder"))
.withExtensionsFolder(Path.of("/path/to/embedded-extensions-folder"));
...
}}
Once built, an EmbeddedHiveMQ can be started with start().
[source,java]
public class Main {
public static void main(String[] args) {
final EmbeddedHiveMQBuilder embeddedHiveMQBuilder = EmbeddedHiveMQ.builder();
...
try (final EmbeddedHiveMQ hiveMQ = embeddedHiveMQBuilder.build()) {
hiveMQ.start().join();
...
} catch (final Exception ex) {
ex.printStackTrace();
}
}}
A running EmbeddedHiveMQ can be stopped with stop().
[source,java]
public class Main {
public static void main(String[] args) {
...
try (final EmbeddedHiveMQ hiveMQ = embeddedHiveMQBuilder.build()) {
...
hiveMQ.stop().join();
} catch (final Exception ex) {
ex.printStackTrace();
}
}}
Similar to the embedded HiveMQ an embedded extension can be built with the com.hivemq.embedded.EmbeddedExtensionBuilder.
Then add the embedded extension to the embedded HiveMQ builder.
[source,java]
public class Main {
public static void main(String[] args) {
final EmbeddedExtension embeddedExtension = EmbeddedExtension.builder()
.withId("embedded-ext-1")
.withName("Embedded Extension")
.withVersion("1.0.0")
.withPriority(0)
.withStartPriority(1000)
.withAuthor("Me")
.withExtensionMain(new MyEmbeddedExtensionMain())
.build();
final EmbeddedHiveMQBuilder builder = EmbeddedHiveMQ.builder()
.withConfigurationFolder(Path.of("/path/to/embedded-config-folder"))
.withDataFolder(Path.of("/path/to/embedded-data-folder"))
.withExtensionsFolder(Path.of("/path/to/embedded-extensions-folder"))
.withEmbeddedExtension(embeddedExtension);
try (final EmbeddedHiveMQ hiveMQ = builder.build()) {
hiveMQ.start().join();
//do something with hivemq
} catch (final Exception ex) {
ex.printStackTrace();
}
}
private static class MyEmbeddedExtensionMain implements ExtensionMain {
@Override
public void extensionStart(final @NotNull ExtensionStartInput extensionStartInput, final @NotNull ExtensionStartOutput extensionStartOutput) {
// my extension start code
}
@Override
public void extensionStop(final @NotNull ExtensionStopInput extensionStopInput, final @NotNull ExtensionStopOutput extensionStopOutput) {
// my extension stop code
}
}}
NOTE: An EmbeddedHiveMQ is a resource that is similar to a e.g. network connection and implements the java.lang.AutoCloseable interface.
Always use ARM (try with resources) or ensure a call to close().
==== Exclusions
When you deploy an application that includes EmbeddedHiveMQ, it can be useful to exclude some dependencies. One way to exclude dependencies is with the link:https://maven.apache.org/plugins/maven-shade-plugin/[maven shade plugin].
[source,xml]
===== RocksDB Exclusion
To exclude the org.rocksdb:rocksdbjni dependency, two internal configurations must be changed before you call start().
[source,java]
public class Main {
public static void main(String[] args) {
...
try (final EmbeddedHiveMQ hiveMQ = embeddedHiveMQBuilder.build()) {
InternalConfigurations.PAYLOAD_PERSISTENCE_TYPE.set(PersistenceType.FILE);
InternalConfigurations.RETAINED_MESSAGE_PERSISTENCE_TYPE.set(PersistenceType.FILE);
hiveMQ.start().join();
...
} catch (final Exception ex) {
ex.printStackTrace();
}
}}
== Contributing
If you want to contribute to HiveMQ CE, see the link:CONTRIBUTING.adoc[contribution guidelines].
== License
HiveMQ Community Edition is licensed under the APACHE LICENSE, VERSION 2.0.
A copy of the license can be found link:LICENSE[here].
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