Rex (rex meaning "king" in Latin, the one that imposes order) is a microservice which serves as HTTP scheduler.

Rex requires a graph of dependent tasks that need to be scheduled and ran in particular order.

Each task has a HTTP request definition to start and cancel. These definitions are later used by Rex to start and cancel tasks remotely. Rex augments these requests with a callback for the remote service to report successful/unsuccessful completion of remote tasks. Additionally, there is an option to define a notification request for a task which will make Rex publish notifications as the task transitions between states.

• Apache Maven 3.8.1+
• OpenJDK 11
• Infinispan Server 11.0.3.Final+ (tested)

1. With script

• Run a bash script in scripts/run-ispn.sh
• The script
  • will download correct version of ISPN
  • add a simple user "user" with password 1234
  • run the ISPN server
• On repeated use, the server is started always fresh (no cache configurations)

2. Manually (out-of-date)

• wget https://downloads.jboss.org/infinispan/9.4.16.Final/infinispan-server-11.0.3.Final.zip
• unzip infinispan-server-11.0.3.Final.zip
• infinispan-server-11.0.3.Final/bin/standalone.sh -c clustered.xml (to make it available on LAN/WAN, supply the host/ip-address within additional option -b="ip-address", otherwise it defaults to "localhost")
• wait until started
• open new terminal
• infinispan-server-11.0.3.Final/bin/ispn-cli.sh --file="path/to/scheduler/server-config.cli"
• wait for the server to reload

• To run integration-tests (currently the only tests) you have to have Infinispan server running locally (scripts/run-ispn.sh is all that is needed)
  • (for the future testcontainers are considered)
• mvn clean test to run tests

• mvn clean install -DskipTests
• java [-options] -jar core/target/quarkus-app/quarkus-run.jar
  • additional options
    • -Dquarkus.infinispan-client.server-list=:11222 (REQUIRED)
      • Host/ip-address of InfinispanHot-Rod server.
      • ALTERNATIVE: export ISPN_NODE=<ispn-ip-address>:11222
    • -Dscheduler.baseUrl=: (REQUIRED)
      • URL address of thescheduler which is used for callbacks sent to remote entities.
      • ALTERNATIVE: export BASE_URL=<scheduler-url>
    • -Dquarkus.http.port=:
      • Port where the application is deployed on. Default value is 80.
    • -Dquarkus.infinispan-client.auth-username=
      • username for authentication to ISPN server
      • ALTERNATIVE: export ISPN_USER=<USER>
    • -Dquarkus.infinispan-client.auth-password=
      • password for authentication to ISPN server
      • ALTERNATIVE: export ISPN_PASSWORD=<USER>
• /q/swagger-ui is an OpenAPI endpoint

• WARNING: scheduler will compile, but it was not tested properly
• mvn clean install -Pnative
  • the compilation will take couple of minutes
• To run the native app run core/target/core-<version>-runner <options>