mahout.py

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# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
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#
#     http://www.apache.org/licenses/LICENSE-2.0
#
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from jujubigdata import utils
from charms.reactive import when, when_not, set_state
from charms.layer.apache_bigtop_base import Bigtop, get_package_version
from charmhelpers.core import hookenv


@when('bigtop.available')
@when_not('mahout.installed')
def install_mahout():
    hookenv.status_set('maintenance', 'installing mahout')
    bigtop = Bigtop()
    bigtop.render_site_yaml(
        roles=[
            'mahout-client',
        ],
    )
    bigtop.trigger_puppet()
    with utils.environment_edit_in_place('/etc/environment') as env:
        env['MAHOUT_HOME'] = '/usr/lib/mahout'

    set_state('mahout.installed')
    hookenv.status_set('active', 'ready')
    # set app version string for juju status output
    mahout_version = get_package_version('mahout') or 'unknown'
    hookenv.application_version_set(mahout_version)