aria/orchestrator/context/toolbelt.py

# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# 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
# the License.  You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
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# distributed under the License is distributed on an "AS IS" BASIS,
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"""
Tools for operations.
"""

from . import operation


class NodeToolBelt(object):
    """
    Node operation tool belt.
    """
    def __init__(self, operation_context):
        self._op_context = operation_context

    @property
    def host_ip(self):
        """
        The host ip of the current node
        :return:
        """
        assert isinstance(self._op_context, operation.NodeOperationContext)
        return self._op_context.node.host.attributes.get('ip')


class RelationshipToolBelt(object):
    """
    Relationship operation tool belt.
    """
    def __init__(self, operation_context):
        self._op_context = operation_context


def toolbelt(operation_context):
    """
    Get a toolbelt from to the current operation executor.

    :param operation_context:
    """
    if isinstance(operation_context, operation.NodeOperationContext):
        return NodeToolBelt(operation_context)
    elif isinstance(operation_context, operation.RelationshipOperationContext):
        return RelationshipToolBelt(operation_context)
    else:
        raise RuntimeError("Operation context not supported")