409 lines
14 KiB
Python
409 lines
14 KiB
Python
# Copyright (c) 2014 Mirantis, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import os
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import shutil
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import sys
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import types
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import yaml
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from murano.dsl import yaql_expression
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import murano.packages.application_package
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from murano.packages import exceptions
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YAQL = yaql_expression.YaqlExpression
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class Dumper(yaml.Dumper):
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pass
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def yaql_representer(dumper, data):
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return dumper.represent_scalar(u'!yaql', str(data))
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Dumper.add_representer(YAQL, yaql_representer)
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class HotPackage(murano.packages.application_package.ApplicationPackage):
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def __init__(self, source_directory, manifest, loader):
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super(HotPackage, self).__init__(source_directory, manifest, loader)
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self._translated_class = None
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self._source_directory = source_directory
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self._translated_ui = None
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@property
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def classes(self):
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return self.full_name,
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@property
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def ui(self):
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if not self._translated_ui:
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self._translated_ui = self._translate_ui()
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return self._translated_ui
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@property
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def raw_ui(self):
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ui_obj = self.ui
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result = yaml.dump(ui_obj, Dumper=Dumper, default_style='"')
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return result
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def get_class(self, name):
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if name != self.full_name:
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raise exceptions.PackageClassLoadError(
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name, 'Class not defined in this package')
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if not self._translated_class:
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self._translate_class()
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return self._translated_class
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def validate(self):
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self.get_class(self.full_name)
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if not self._translated_ui:
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self._translated_ui = self._translate_ui()
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super(HotPackage, self).validate()
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def _translate_class(self):
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template_file = os.path.join(self._source_directory, 'template.yaml')
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shutil.copy(template_file, self.get_resource(self.full_name))
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if not os.path.isfile(template_file):
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raise exceptions.PackageClassLoadError(
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self.full_name, 'File with class definition not found')
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with open(template_file) as stream:
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hot = yaml.safe_load(stream)
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if 'resources' not in hot:
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raise exceptions.PackageFormatError('Not a HOT template')
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translated = {
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'Name': self.full_name,
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'Extends': 'io.murano.Application'
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}
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parameters = HotPackage._translate_parameters(hot)
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parameters.update(HotPackage._translate_outputs(hot))
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translated['Properties'] = parameters
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translated.update(HotPackage._generate_workflow(hot))
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self._translated_class = translated
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@staticmethod
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def _translate_parameters(hot):
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result = {
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'generatedHeatStackName': {
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'Contract': YAQL('$.string()'),
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'Usage': 'Out'
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}
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}
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for key, value in (hot.get('parameters') or {}).items():
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result[key] = HotPackage._translate_parameter(value)
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result['name'] = {'Usage': 'In',
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'Contract': YAQL('$.string().notNull()')}
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return result
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@staticmethod
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def _translate_parameter(value):
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contract = '$'
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parameter_type = value['type']
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if parameter_type == 'string':
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contract += '.string()'
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elif parameter_type == 'number':
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contract += '.int()'
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elif parameter_type == 'json':
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contract += '.object()'
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else:
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raise ValueError('Unsupported parameter type ' + parameter_type)
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constraints = value.get('constraints') or []
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for constraint in constraints:
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translated = HotPackage._translate_constraint(constraint)
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if translated:
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contract += translated
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result = {
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'Contract': YAQL(contract),
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"Usage": "In"
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}
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if 'default' in value:
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result['Default'] = value['default']
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return result
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@staticmethod
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def _translate_outputs(hot):
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result = {}
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for key, value in (hot.get('outputs') or {}).items():
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result[key] = {
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"Contract": YAQL("$.string()"),
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"Usage": "Out"
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}
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return result
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@staticmethod
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def _translate_constraint(constraint):
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if 'allowed_values' in constraint:
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return HotPackage._translate_allowed_values_constraint(
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constraint['allowed_values'])
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elif 'length' in constraint:
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return HotPackage._translate_length_constraint(
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constraint['length'])
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elif 'range' in constraint:
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return HotPackage._translate_range_constraint(
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constraint['range'])
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elif 'allowed_pattern' in constraint:
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return HotPackage._translate_allowed_pattern_constraint(
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constraint['allowed_pattern'])
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@staticmethod
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def _translate_allowed_pattern_constraint(value):
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return ".check(matches($, '{0}'))".format(value)
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@staticmethod
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def _translate_allowed_values_constraint(values):
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return '.check($ in list({0}))'.format(
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', '.join([HotPackage._format_value(v) for v in values]))
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@staticmethod
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def _translate_length_constraint(value):
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if 'min' in value and 'max' in value:
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return '.check(len($) >= {0} and len($) <= {1})'.format(
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int(value['min']), int(value['max']))
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elif 'min' in value:
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return '.check(len($) >= {0})'.format(int(value['min']))
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elif 'max' in value:
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return '.check(len($) <= {0})'.format(int(value['max']))
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@staticmethod
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def _translate_range_constraint(value):
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if 'min' in value and 'max' in value:
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return '.check($ >= {0} and $ <= {1})'.format(
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int(value['min']), int(value['max']))
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elif 'min' in value:
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return '.check($ >= {0})'.format(int(value['min']))
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elif 'max' in value:
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return '.check($ <= {0})'.format(int(value['max']))
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@staticmethod
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def _format_value(value):
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if isinstance(value, types.StringTypes):
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return str("'" + value + "'")
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return str(value)
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@staticmethod
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def _generate_workflow(hot):
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template_parameters = {}
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for key, value in (hot.get('parameters') or {}).items():
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template_parameters[key] = YAQL("$." + key)
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deploy = [
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{YAQL('$environment'): YAQL(
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"$.find('io.murano.Environment').require()"
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)},
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{YAQL('$reporter'): YAQL(
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"new('io.murano.system.StatusReporter', "
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"environment => $environment)")},
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{
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'If': YAQL('$.getAttr(generatedHeatStackName) = null'),
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'Then': [
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YAQL('$.setAttr(generatedHeatStackName, randomName())')
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]
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},
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{YAQL('$stack'): YAQL(
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"new('io.murano.system.HeatStack', "
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"name => $.getAttr(generatedHeatStackName))")},
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YAQL("$reporter.report($this, "
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"'Application deployment has started')"),
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{YAQL('$resources'): YAQL("new('io.murano.system.Resources')")},
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{YAQL('$template'): YAQL("$resources.yaml(type($this))")},
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{YAQL('$parameters'): template_parameters},
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YAQL('$stack.setTemplate($template)'),
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YAQL('$stack.setParameters($parameters)'),
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YAQL("$reporter.report($this, "
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"'Stack creation has started')"),
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YAQL('$stack.push()'),
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{YAQL('$outputs'): YAQL('$stack.output()')},
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YAQL("$reporter.report($this, "
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"'Stack was successfully created')"),
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YAQL("$reporter.report($this, "
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"'Application deployment has finished')"),
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]
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for key, value in (hot.get('outputs') or {}).items():
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deploy.append({YAQL('$.' + key): YAQL(
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'$outputs.' + key)})
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destroy = [
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{YAQL('$stack'): YAQL(
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"new('io.murano.system.HeatStack', "
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"name => $.getAttr(generatedHeatStackName))")},
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YAQL('$stack.delete()')
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]
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return {
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'Workflow': {
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'deploy': {
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'Body': deploy
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},
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'destroy': {
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'Body': destroy
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}
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}
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}
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@staticmethod
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def _translate_ui_parameters(hot, title):
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result = [
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{
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'name': 'title',
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'type': 'string',
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'required': False,
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'hidden': True,
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'description': title
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},
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{
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'name': 'name',
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'type': 'string',
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'label': 'Application Name',
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'required': True,
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'description':
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'Enter a desired name for the application.'
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' Just A-Z, a-z, 0-9, and dash are allowed'
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}
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]
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for key, value in (hot.get('parameters') or {}).items():
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result.append(HotPackage._translate_ui_parameter(key, value))
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return result
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@staticmethod
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def _translate_ui_parameter(name, parameter_spec):
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translated = {
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'name': name,
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'label': name.title().replace('_', ' ')
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}
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parameter_type = parameter_spec['type']
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if parameter_type == 'string':
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translated['type'] = 'string'
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elif parameter_type == 'number':
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translated['type'] = 'integer'
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if 'description' in parameter_spec:
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translated['description'] = parameter_spec['description']
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if 'default' in parameter_spec:
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translated['initial'] = parameter_spec['default']
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translated['required'] = False
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else:
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translated['required'] = True
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constraints = parameter_spec.get('constraints') or []
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translated_constraints = []
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for constraint in constraints:
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if 'length' in constraint:
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spec = constraint['length']
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if 'min' in spec:
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translated['minLength'] = max(
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translated.get('minLength', -sys.maxint - 1),
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int(spec['min']))
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if 'max' in spec:
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translated['maxLength'] = min(
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translated.get('maxLength', sys.maxint),
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int(spec['max']))
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elif 'range' in constraint:
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spec = constraint['range']
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if 'min' in spec and 'max' in spec:
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ui_constraint = {
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'expr': YAQL('$ >= {0} and $ <= {1}'.format(
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spec['min'], spec['max']))
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}
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elif 'min' in spec:
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ui_constraint = {
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'expr': YAQL('$ >= {0}'.format(spec['min']))
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}
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else:
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ui_constraint = {
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'expr': YAQL('$ <= {0}'.format(spec['max']))
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}
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if 'description' in constraint:
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ui_constraint['message'] = constraint['description']
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translated_constraints.append(ui_constraint)
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elif 'allowed_values' in constraint:
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values = constraint['allowed_values']
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ui_constraint = {
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'expr': YAQL('$ in list({0})'.format(', '.join(
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[HotPackage._format_value(v) for v in values])))
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}
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if 'description' in constraint:
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ui_constraint['message'] = constraint['description']
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translated_constraints.append(ui_constraint)
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elif 'allowed_pattern' in constraint:
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pattern = constraint['allowed_pattern']
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ui_constraint = {
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'expr': {
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'regexpValidator': pattern
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}
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}
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if 'description' in constraint:
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ui_constraint['message'] = constraint['description']
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translated_constraints.append(ui_constraint)
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if translated_constraints:
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translated['validators'] = translated_constraints
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return translated
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@staticmethod
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def _generate_application_ui(hot, type_name):
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app = {
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'?': {
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'type': type_name
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}
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}
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for key in (hot.get('parameters') or {}).keys():
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app[key] = YAQL('$.appConfiguration.' + key)
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app['name'] = YAQL('$.appConfiguration.name')
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return app
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def _translate_ui(self):
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template_file = os.path.join(self._source_directory, 'template.yaml')
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if not os.path.isfile(template_file):
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raise exceptions.PackageClassLoadError(
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self.full_name, 'File with class definition not found')
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with open(template_file) as stream:
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hot = yaml.safe_load(stream)
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translated = {
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'Version': 2,
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'Application': HotPackage._generate_application_ui(
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hot, self.full_name),
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'Forms': [
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{
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'appConfiguration': {
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'fields': HotPackage._translate_ui_parameters(
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hot, self.description)
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}
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}
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]
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}
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return translated
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