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Cadence is a distributed, scalable, durable, and highly available orchestration engine to execute asynchronous long-running business logic in a scalable and resilient way.
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.buildkite Remove Deprecated code of Events V1 (#2634) Oct 11, 2019
.gen/go Handle sync activity in NDC (#2673) Oct 17, 2019
canary Update canary error handling (#2683) Oct 17, 2019
client Implement Admin Get Raw History API For NDC (#2625) Oct 10, 2019
cmd Add nosec comments for scanner (#2568) Sep 24, 2019
common Rewrite passive task processing life cycle (#2680) Oct 17, 2019
config Fix clusterInfo in development_mysql.yaml (#2608) Sep 26, 2019
docker Adds prometheus config to config_template.yml (#2669) Oct 16, 2019
docs fixed small errors in docs (#1) (#2548) Sep 18, 2019
environment Add ES integration test (#1703) Apr 16, 2019
host Handle sync activity in NDC (#2673) Oct 17, 2019
idl/ Handle sync activity in NDC (#2673) Oct 17, 2019
schema Delete CompleteFork API from History Persistence (#2675) Oct 16, 2019
scripts Remove Deprecated code of Events V1 (#2634) Oct 11, 2019
service Fix sync activity linting (#2686) Oct 18, 2019
tools sql-tool: fix error message (#2667) Oct 15, 2019
.dockerignore New Dockerfiles (#2325) Aug 1, 2019
.gitignore Wire NDC implementation end to end (#2521) Sep 9, 2019
.gitmodules Remove internal git submodules (#9) Feb 24, 2017 Remove unused file and docker release instruction(moved to internal) (#… May 11, 2019
Dockerfile Upgrade to go 1.13 (#2592) Sep 24, 2019
LICENSE Implement NDC events reapplication (#2577) Sep 24, 2019
Makefile Remove Deprecated code of Events V1 (#2634) Oct 11, 2019 Add proposal process documentation (#2127) Jul 2, 2019 Delete unused folder/files (#2676) Oct 16, 2019
go.mod Update CLI to support Visibility Archival (#2615) Oct 1, 2019
go.sum Update admin CLI handle NDC version history (#2662) Oct 14, 2019


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Visit to learn about Cadence.

This repo contains the source code of the Cadence server. To implement workflows, activities and worker use Go client or Java client.

See Maxim's talk at Data@Scale Conference for an architectural overview of Cadence.

Getting Started

Start the cadence-server locally

We highly recommend that you use Cadence service docker to run the service.

Run the Samples

Try out the sample recipes for Go or Java to get started.


Try out Cadence command-line tool to perform various tasks on Cadence

Use Cadence Web

Try out Cadence Web UI to view your workflows on Cadence.
(This is already available at localhost:8088 if you run Cadence with docker compose)


We'd love your help in making Cadence great. Please review our contribution guide.

If you'd like to propose a new feature, first join the Cadence discussion group and Slack channel to start a discussion and check if there are existing design discussions. Also peruse our design docs in case a feature has been designed but not yet implemented. Once you're sure the proposal is not covered elsewhere, please follow our proposal instructions.


MIT License, please see LICENSE for details.

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