XLDeploy: Check running tasks running or have scheduled to prevent several deployment on the same environment

planning-check.py

def deployedApplication():
    return specification.deployedOrPreviousApplication


environment = deployedApplication().environment
candidates = filter(lambda task: task.metadata['environment_id'] == environment.id, taskService.allCurrentTasks)

if len(candidates) == 1:
    raise Exception("%d deployment task is running or has been scheduled on '%s'" % (len(candidates), environment.id))

if len(candidates) > 1:
    raise Exception("%d deployment tasks are running or have been scheduled on '%s'" % (len(candidates), environment.id))

context.addStep(steps.jython(
    description = "Check there is no running deployment tasks running on '%s' " % environment.id,
    order = 60,
    script_path = "task/step/check.py",
    jython_context = {"environment_id": environment.id,
        "application_name": deployedApplication().version.application.name,
        "version_name": deployedApplication().version.name}
))

step-check.py

print "Environment %s" % environment_id
print "Application %s" % application_name
print "Version     %s" % version_name

def task_predicate(task):
    metadata = task.metadata
    return metadata['environment_id'] == environment_id and not (metadata['application'] == application_name and metadata['version'] == version_name)

candidates = filter(task_predicate, taskService.allCurrentTasks)

if len(candidates) == 1:
    raise Exception("%d deployment task is running or has been scheduled on '%s'" % (len(candidates), environment_id))

if len(candidates) > 1:
    raise Exception("%d deployment tasks are running or have been scheduled on '%s'" % (len(candidates), environment_id))

print "no running tasks on %s, go on...." % environment_id

xl-rules.xml

<rule name="check.running.task.in.the.current.environment" scope="pre-plan">
    <planning-script-path>task/planning/check.py</planning-script-path>
</rule>