apache-ignite

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# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements.  See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership.
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# The ASF licenses this file to You under the Apache License, Version 2.0
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# (the "License"); you may not use this file except in compliance with
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# the License.  You may obtain a copy of the License at
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#
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#    http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""
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This module contains ignite config classes and utilities.
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"""
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import os
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from jinja2 import FileSystemLoader, Environment
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IGNITE_TEMPLATE_PATH = os.path.join(os.path.dirname(os.path.abspath(__file__)), "templates")
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ZK_TEMPLATE_PATH = os.path.join(os.path.dirname(os.path.abspath(__file__)), "..", "zk", "templates")
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DEFAULT_IGNITE_CONF = "ignite.xml.j2"
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DEFAULT_THIN_CLIENT_CONF = "thin_client_config.xml.j2"
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DEFAULT_LOG4J2_CONF = "log4j2.xml.j2"
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TEMPLATE_PATHES = [IGNITE_TEMPLATE_PATH, ZK_TEMPLATE_PATH]
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class ConfigTemplate:
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    """
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    Basic configuration.
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    """
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    def __init__(self, path):
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        env = Environment(loader=FileSystemLoader(searchpath=TEMPLATE_PATHES))
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        env.filters["snake_to_camel"] = snake_to_camel
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        self.template = env.get_template(path)
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        self.default_params = {}
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    def render(self, **kwargs):
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        """
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        Render configuration.
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        """
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        kwargs.update(self.default_params)
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        unfiltered = self.template.render(**kwargs)
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        return '\n'.join(filter(lambda line: line.strip(), unfiltered.split('\n')))
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def snake_to_camel(snake_name):
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    """
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    Custom jinja2 filter to convert named from smake to camel format
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    :param snake_name: name in snake format
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    :return: name in camel format
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    """
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    components = snake_name.split('_')
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    return components[0] + ''.join(x.title() for x in components[1:])
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class IgniteServerConfigTemplate(ConfigTemplate):
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    """
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    Ignite server node configuration.
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    """
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    def __init__(self, path=DEFAULT_IGNITE_CONF):
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        super().__init__(path)
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class IgniteClientConfigTemplate(ConfigTemplate):
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    """
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    Ignite client node configuration.
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    """
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    def __init__(self, path=DEFAULT_IGNITE_CONF):
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        super().__init__(path)
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        self.default_params.update(client_mode=True)
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class IgniteThinClientConfigTemplate(ConfigTemplate):
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    """
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    Ignite client node configuration.
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    """
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    def __init__(self, path=DEFAULT_THIN_CLIENT_CONF):
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        super().__init__(path)
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class IgniteLoggerConfigTemplate(ConfigTemplate):
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    """
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    Ignite logger configuration.
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    """
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    def __init__(self):
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        super().__init__(DEFAULT_LOG4J2_CONF)
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