1 # ============LICENSE_START=======================================================
3 # ================================================================================
4 # Copyright (c) 2017 AT&T Intellectual Property. All rights reserved.
5 # ================================================================================
6 # Licensed under the Apache License, Version 2.0 (the "License");
7 # you may not use this file except in compliance with the License.
8 # You may obtain a copy of the License at
10 # http://www.apache.org/licenses/LICENSE-2.0
12 # Unless required by applicable law or agreed to in writing, software
13 # distributed under the License is distributed on an "AS IS" BASIS,
14 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 # See the License for the specific language governing permissions and
16 # limitations under the License.
17 # ============LICENSE_END=========================================================
19 # ECOMP is a trademark and service mark of AT&T Intellectual Property.
21 # -*- coding: utf-8 -*-
26 from functools import partial, reduce
29 from jsonschema import validate, ValidationError
32 from dcae_cli.util import reraise_with_msg, fetch_file_from_web
33 from dcae_cli.util import config as cli_config
34 from dcae_cli.util.exc import DcaeException
35 from dcae_cli.util.logger import get_logger
38 log = get_logger('Schema')
40 # UPDATE: This message applies to the component spec which has been moved on a
43 # WARNING: The below has a "oneOf" for service provides, that will validate as long as any of them are chosen.
44 # However, this is wrong because what we really want is something like:
45 # if component_type == docker
47 # elif component_type == cdap
49 # The unlikely but problematic case is the cdap developer gets a hold of the docker documentation, uses that, it validates, and blows up at cdap runtime
52 # TODO: The next step here is to decide how to manage the links to the schemas. Either:
54 # a) Manage the links in the dcae-cli tool here and thus need to ask if this
55 # belongs in the config to point to some remote server or even point to local
57 # UPDATE: This item has been mostly completed where at least the path is configurable now.
59 # b) Read the links to the schemas from the spec - self-describing jsons. Is
65 class FetchSchemaError(RuntimeError):
68 def _fetch_schema(schema_path):
70 server_url = cli_config.get_server_url()
71 return fetch_file_from_web(server_url, schema_path)
72 except requests.HTTPError as e:
73 raise FetchSchemaError("HTTP error from fetching schema", e)
74 except Exception as e:
75 raise FetchSchemaError("Unexpected error from fetching schema", e)
79 '''Returns a dict from a dict or json string'''
80 if isinstance(obj, str):
81 return json.loads(obj)
85 def _validate(fetch_schema_func, schema_path, spec):
86 '''Validate the given spec
88 Fetch the schema and then validate. Upon a error from fetching or validation,
89 a DcaeException is raised.
93 fetch_schema_func: function that takes schema_path -> dict representation of schema
94 throws a FetchSchemaError upon any failure
95 schema_path: string - path to schema
96 spec: dict or string representation of JSON of schema instance
100 Nothing, silence is golden
103 schema = fetch_schema_func(schema_path)
104 validate(_safe_dict(spec), schema)
105 except ValidationError as e:
106 reraise_with_msg(e, as_dcae=True)
107 except FetchSchemaError as e:
108 reraise_with_msg(e, as_dcae=True)
110 _validate_using_nexus = partial(_validate, _fetch_schema)
113 _path_component_spec = cli_config.get_path_component_spec()
115 def apply_defaults(properties_definition, properties):
116 """Utility method to enforce expected defaults
118 This method is used to enforce properties that are *expected* to have at least
119 the default if not set by a user. Expected properties are not required but
120 have a default set. jsonschema does not provide this.
124 properties_definition: dict of the schema definition of the properties to use
125 for verifying and applying defaults
126 properties: dict of the target properties to verify and apply defaults to
130 dict - a new version of properties that has the expected default values
132 # Recursively process all inner objects. Look for more properties and not match
134 for k,v in six.iteritems(properties_definition):
135 if "properties" in v:
136 properties[k] = apply_defaults(v["properties"], properties.get(k, {}))
139 defaults = [ (k, v["default"]) for k, v in properties_definition.items() if "default" in v ]
141 def apply_default(accumulator, default):
143 if k not in accumulator:
144 # Not doing data type checking and any casting. Assuming that this
145 # should have been taken care of in validation
149 return reduce(apply_default, defaults, properties)
151 def apply_defaults_docker_config(config):
152 """Apply expected defaults to Docker config
155 config: Docker config dict
158 Updated Docker config dict
160 # Apply health check defaults
161 healthcheck_type = config["healthcheck"]["type"]
162 component_spec = _fetch_schema(_path_component_spec)
164 if healthcheck_type in ["http", "https"]:
165 apply_defaults_func = partial(apply_defaults,
166 component_spec["definitions"]["docker_healthcheck_http"]["properties"])
167 elif healthcheck_type in ["script"]:
168 apply_defaults_func = partial(apply_defaults,
169 component_spec["definitions"]["docker_healthcheck_script"]["properties"])
171 # You should never get here
172 apply_defaults_func = lambda x: x
174 config["healthcheck"] = apply_defaults_func(config["healthcheck"])
178 def validate_component(spec):
179 _validate_using_nexus(_path_component_spec, spec)
181 # REVIEW: Could not determine how to do this nicely in json schema. This is
182 # not ideal. We want json schema to be the "it" for validation.
183 ctype = component_type = spec["self"]["component_type"]
186 invalid = [s for s in spec["streams"].get("subscribes", []) \
187 if s["type"] in ["data_router", "data router"]]
189 raise DcaeException("Cdap component as data router subscriber is not supported.")
191 def validate_format(spec):
192 path = cli_config.get_path_data_format()
193 _validate_using_nexus(path, spec)