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README.md

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Pulsar is a distributed pub-sub messaging platform with a very flexible messaging model and an intuitive client API.

Learn more about Pulsar at https://pulsar.apache.org

Main features

  • Horizontally scalable (Millions of independent topics and millions of messages published per second)
  • Strong ordering and consistency guarantees
  • Low latency durable storage
  • Topic and queue semantics
  • Load balancer
  • Designed for being deployed as a hosted service:
    • Multi-tenant
    • Authentication
    • Authorization
    • Quotas
    • Support mixing very different workloads
    • Optional hardware isolation
  • Keeps track of consumer cursor position
  • REST API for provisioning, admin and stats
  • Geo replication
  • Transparent handling of partitioned topics
  • Transparent batching of messages

Repositories

This repository is the main repository of Apache Pulsar. Pulsar PMC also maintains other repositories for components in the Pulsar ecosystem, including connectors, adapters, and other language clients.

Helm Chart

Ecosystem

Clients

Dashboard & Management Tools

Website

CI/CD

Archived/Halted

Pulsar Runtime Java Version Recommendation

  • pulsar ver > 2.10 and master branch
Components Java Version
Broker 17
Functions / IO 17
CLI 17
Java Client 8 or 11 or 17
  • 2.8 <= pulsar ver <= 2.10
Components Java Version
Broker 11
Functions / IO 11
CLI 8 or 11
Java Client 8 or 11
  • pulsar ver < 2.8
Components Java Version
All 8 or 11

Build Pulsar

Requirements

  • JDK

    Pulsar Version JDK Version
    master and 2.11 + JDK 17
    2.8 / 2.9 / 2.10 JDK 11
    2.7 - JDK 8
  • Maven 3.6.1+

  • zip

Note:

This project includes a Maven Wrapper that can be used instead of a system-installed Maven. Use it by replacing mvn by ./mvnw on Linux and mvnw.cmd on Windows in the commands below.

It's better to use CMD rather than Powershell on Windows. Because maven will activate the windows profile which runs rename-netty-native-libs.cmd.

Build

Compile and install:

$ mvn install -DskipTests

Compile and install individual module

$ mvn -pl module-name (e.g: pulsar-broker) install -DskipTests

Minimal build (This skips most of external connectors and tiered storage handlers)

mvn install -Pcore-modules,-main -DskipTests

Run Unit Tests:

$ mvn test

Run Individual Unit Test:

$ mvn -pl module-name (e.g: pulsar-client) test -Dtest=unit-test-name (e.g: ConsumerBuilderImplTest)

Run Selected Test packages:

$ mvn test -pl module-name (for example, pulsar-broker) -Dinclude=org/apache/pulsar/**/*.java

Start standalone Pulsar service:

$ bin/pulsar standalone

Check https://pulsar.apache.org for documentation and examples.

Build custom docker images

  • Docker images must be built with Java 8 for branch-2.7 or previous branches because of ISSUE-8445.
  • Java 11 is the recommended JDK version in branch-2.8, branch-2.9 and branch-2.10.
  • Java 17 is the recommended JDK version in master.

The following command builds the docker images apachepulsar/pulsar-all:latest and apachepulsar/pulsar:latest:

mvn clean install -DskipTests
mvn package -Pdocker,-main -am -pl docker/pulsar-all -DskipTests

After the images are built, they can be tagged and pushed to your custom repository. Here's an example of a bash script that tags the docker images with the current version and git revision and pushes them to localhost:32000/apachepulsar.

image_repo_and_project=localhost:32000/apachepulsar
pulsar_version=$(mvn initialize help:evaluate -Dexpression=project.version -pl . -q -DforceStdout)
gitrev=$(git rev-parse HEAD | colrm 10)
tag="${pulsar_version}-${gitrev}"
echo "Using tag $tag"
docker tag apachepulsar/pulsar-all:latest ${image_repo_and_project}/pulsar-all:$tag
docker push ${image_repo_and_project}/pulsar-all:$tag
docker tag apachepulsar/pulsar:latest ${image_repo_and_project}/pulsar:$tag
docker push ${image_repo_and_project}/pulsar:$tag

Setting up your IDE

Read https://pulsar.apache.org/contribute/setup-ide for setting up IntelliJ IDEA or Eclipse for developing Pulsar.

Documentation

Note:

For how to make contributions to Pulsar documentation, see Pulsar Documentation Contribution Guide.

Contact

Mailing lists
Name Scope Subscribe Unsubscribe Archives
users@pulsar.apache.org User-related discussions Subscribe Unsubscribe Archives
dev@pulsar.apache.org Development-related discussions Subscribe Unsubscribe Archives
Slack

Pulsar slack channel at https://apache-pulsar.slack.com/

You can self-register at https://apache-pulsar.herokuapp.com/

Report a security vulnerability

To report a vulnerability for Pulsar, contact the Apache Security Team. When reporting a vulnerability to security@apache.org, you can copy your email to private@pulsar.apache.org to send your report to the Apache Pulsar Project Management Committee. This is a private mailing list.

https://github.com/apache/pulsar/security/policy contains more details.

License

Licensed under the Apache License, Version 2.0: http://www.apache.org/licenses/LICENSE-2.0

Crypto Notice

This distribution includes cryptographic software. The country in which you currently reside may have restrictions on the import, possession, use, and/or re-export to another country, of encryption software. BEFORE using any encryption software, please check your country's laws, regulations and policies concerning the import, possession, or use, and re-export of encryption software, to see if this is permitted. See http://www.wassenaar.org/ for more information.

The U.S. Government Department of Commerce, Bureau of Industry and Security (BIS), has classified this software as Export Commodity Control Number (ECCN) 5D002.C.1, which includes information security software using or performing cryptographic functions with asymmetric algorithms. The form and manner of this Apache Software Foundation distribution makes it eligible for export under the License Exception ENC Technology Software Unrestricted (TSU) exception (see the BIS Export Administration Regulations, Section 740.13) for both object code and source code.

The following provides more details on the included cryptographic software: Pulsar uses the SSL library from Bouncy Castle written by http://www.bouncycastle.org.

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