Guice-Cassandra-Rabbitmq-S3 installation guide



  • Java 11 SDK
  • Docker ∕ OpenSearch 2.1.0, RabbitMQ Management 3.8.18, compatible S3 ObjectStorage and Cassandra 4.0
  • Maven 3

Building the artifacts

An usual compilation using maven will produce two artifacts into server/apps/distributed-app/target directory:

  • james-server-distributed-app.jar
  • james-server-distributed-app.lib

You can for example run in the base of this git repository:

mvn clean install



  • Cassandra 4.0
  • OpenSearch 2.1.0
  • RabbitMQ-Management 3.8.18
  • Zenko Cloudserver or AWS S3 compatible API

James Launch

To run james, you have to create a directory containing required configuration files.

James requires the configuration to be in a subfolder of working directory that is called conf. You can get a sample directory for configuration from server/apps/distributed-app/sample-configuration. You might need to adapt it to your needs.

You also need to generate a keystore in your conf folder with the following command:

$ keytool -genkey -alias james -keyalg RSA -keystore conf/keystore

You need to have a Cassandra, OpenSearch, S3 and RabbitMQ instance running. You can either install the servers or launch them via docker:

$ docker run -d -p 9042:9042 --name=cassandra cassandra:4.1.3
$ docker run -d --network james -p 9200:9200 --name=opensearch --env 'discovery.type=single-node' opensearchproject/opensearch:2.1.0
$ docker run -d -p 5672:5672 -p 15672:15672 --name=rabbitmq rabbitmq:3.12.1-management
$ docker run -d --env 'REMOTE_MANAGEMENT_DISABLE=1' --env 'SCALITY_ACCESS_KEY_ID=accessKey1' --env 'SCALITY_SECRET_ACCESS_KEY=secretKey1' --name=s3

Once everything is set up, you just have to run the jar with:

$ java -jar target/james-server-distributed-app.jar

Using AWS S3 of Zenko Cloudserver

By default, James is configured with Zenko Cloudserver which is compatible with AWS S3, in blobstore.propeties as such: