JobStreamer control bus

The JobStreamer control bus is a message passing system to agents.


Features

• Deploy a batch application. (And parse JavaBatch components from application classpath)

• Register a job.

• Delete a job.

• Update a job.

• Schedule a job.

• Stop a schedule of job.

• Delete a schedule of job.

For Developers

Duct framework is used in the JobStreamer control bus.

Run a REPL and start a control bus as follows:

% lein repl
Clojure 1.8.0
Java HotSpot(TM) 64-Bit Server VM 1.8.0_92-b14
    Docs: (doc function-name-here)
          (find-doc "part-of-name-here")
  Source: (source function-name-here)
 Javadoc: (javadoc java-object-or-class-here)
    Exit: Control+D or (exit) or (quit)
 Results: Stored in vars *1, *2, *3, an exception in *e

user=> (dev)
:loaded
user=> (go)

API

Create a appliccation

POST /apps

Example

{
  :name "batch-example"
  :description "Batch example"
  :classpath [
    "file:///home/app/target/classes"
    "file:///var/m2/repository/xxx/xxx.jar"
    "file:///var/m2/repository/yyy/yyy.jar"
    "file:///var/m2/repository/zzz/zzz.jar"
  ]
}

NOTICE

Currently, JobStreamer supports only single application.

List jobs

GET /:app-name/jobs

Response

[
  {
    :job/id           "JOB-1"
    :job/restartable? true
  }
]

Create a job

POST /:app-name/jobs

Parameters

Name	Type	Description
id	String	Required. The identity of the job.

Example

{
  :id "JOB-1"
  :steps [
    {
      :id "STEP-1"
      :batchlet {
        :ref "example.Batchlet"
      }
    }
  ]
}

Get a single job

GET /:app-name/job/:job-name

Response

{
  :db/id 17592186045451
  :job/stats {
    :total 49
    :success 39
    :failure 3
    :average 2660/39
  }
  :job/schedule {
    :schedule/active? true
    :schedule/cron-notation "0 0 * * * ?"
  }
  :job/restartable? true
  :job/name "MyShell"
  :job/next-execution {
    :job-execution/start-time #inst "2015-04-13T09:00:00.000-00:00"
  }
  :job/latest-execution {
    :job-execution/batch-status {:db/ident :batch-status/queued}
    :job-execution/create-time #inst "2015-04-13T07:00:00.006-00:00"
  }
}

Update a job

PUT /:app-name/job/:job-name

Inputs

Name	Type	Description
id	String	Required. The identity of the job.

Delete a job

DELETE /:app-name/job/:job-name

Schedule a job

POST /:app-name/job/:job-name/schedule

Input

Name	Type	Description
job/name	String	Required. A job name
schedule/cron-notation	String	Required. A schedule by the cron notation.

{
 :job/name "MyShell"
 :schedule/cron-notation "0 0 * * * ?"
}

Execute a job

POST /:app-name/job/:job-name/executions

List executions

GET /:app-name/job/:job-name/executions

Response

[
  {
    :db/id 17592186045455
    :job-execution/execution-id 119
    :job-execution/create-time #inst "2015-04-08T04:54:15.703-00:00"
    :job-execution/start-time #inst "2015-04-08T04:55:01.694-00:00"
    :job-execution/end-time #inst "2015-04-08T04:55:01.796-00:00"
    :job-execution/agent {
      :agent/name "agent-1"
      :agent/instance-id #uuid "5424c784-a145-4d3e-96f3-b9d99858611a"
    }
    :job-execution/batch-status {:db/ident :batch-status/completed}
    :job-execution/job-parameters "{}"
  }
]

Get a single execution

GET /:app-name/job/:job-name/execution/:execution-id

List agents

GET /agents

Response

Get a single agent

GET /agent/:instance-id

Response

{
  :agent/name "agent-1"
  :agent/port 4510
  :agent/jobs {:running 0}
  :command :ready
  :agent/instance-id #uuid "d7dd0172-d272-41a4-aad2-56318b2234ee"
  :agent/cpu-arch "amd64"
  :agent/cpu-core 4
  :agent/os-name "Linux"
  :agent/stats {
    :memory {
      :physical {
        :free 1070014464
        :total 8281976832
      }
      :swap {
        :free 34325999616
        :total 34359734272
      }
    }
    :cpu {
      :process {
        :load 0.024032586558044806
        :time 13050000000
      }
      :system {
        :load 0.07780040733197556
        :load-average 2.43
      }
    }
  }
  :agent/os-version "3.19.3-3-ARCH"
  :agent/host "127.0.0.1"
  :agent/executions []
}

Get statistics of control bus

GET /:app-name/stats

Response

{:agents 0, :jobs 3}