Add modules for AODH

Change-Id: Ifa9fb205f3043ea99b8153fd67184d13da84ca0f
Related-Issue: PROD-25008 (PROD:25008)
diff --git a/_modules/aodhv2/__init__.py b/_modules/aodhv2/__init__.py
new file mode 100644
index 0000000..7eb1f85
--- /dev/null
+++ b/_modules/aodhv2/__init__.py
@@ -0,0 +1,32 @@
+try:
+    import os_client_config  # noqa
+    from keystoneauth1 import exceptions as ka_exceptions  # noqa
+    REQUIREMENTS_MET = True
+except ImportError:
+    REQUIREMENTS_MET = False
+
+from aodhv2 import lists
+from aodhv2 import alarms
+
+alarm_list = lists.alarm_list
+alarm_create = alarms.alarm_create
+alarm_get_details = alarms.alarm_get_details
+alarm_update = alarms.alarm_update
+alarm_delete = alarms.alarm_delete
+alarm_history_get = alarms.alarm_history_get
+alarm_state_set = alarms.alarm_state_set
+alarm_state_get = alarms.alarm_state_get
+
+
+__all__ = ('alarm_list', 'alarm_create', 'alarm_delete', 'alarm_get_details',
+           'alarm_history_get', 'alarm_state_get', 'alarm_state_set',
+           'alarm_update')
+
+
+def __virtual__():
+    """Only load aodhv2 if requirements are available."""
+    if REQUIREMENTS_MET:
+        return 'aodhv2'
+    else:
+        return False, ("The aodhv2 execution module cannot be loaded: "
+                       "os_client_config or keystoneauth are unavailable.")
diff --git a/_modules/aodhv2/alarms.py b/_modules/aodhv2/alarms.py
new file mode 100644
index 0000000..9d8a6dc
--- /dev/null
+++ b/_modules/aodhv2/alarms.py
@@ -0,0 +1,50 @@
+from aodhv2.common import send
+from aodhv2.arg_converter import get_by_name_or_uuid_multiple
+
+
+@send('post')
+def alarm_create(**kwargs):
+    url = '/alarms'
+    return url, kwargs
+
+
+@get_by_name_or_uuid_multiple([('alarm', 'alarm_id')])
+@send('get')
+def alarm_get_details(alarm_id, **kwargs):
+    url = '/alarms/{}'.format(alarm_id)
+    return url, None
+
+
+@get_by_name_or_uuid_multiple([('alarm', 'alarm_id')])
+@send('put')
+def alarm_update(alarm_id, **kwargs):
+    url = '/alarms/{}'.format(alarm_id)
+    return url, kwargs
+
+
+@get_by_name_or_uuid_multiple([('alarm', 'alarm_id')])
+@send('delete')
+def alarm_delete(alarm_id, **kwargs):
+    url = '/alarms/{}'.format(alarm_id)
+    return url, None
+
+
+@get_by_name_or_uuid_multiple([('alarm', 'alarm_id')])
+@send('get')
+def alarm_history_get(alarm_id, **kwargs):
+    url = '/alarms/{}/history'.format(alarm_id)
+    return url, None
+
+
+@get_by_name_or_uuid_multiple([('alarm', 'alarm_id')])
+@send('put')
+def alarm_state_set(alarm_id, state, **kwargs):
+    url = '/alarms/{}/state'.format(alarm_id)
+    return url, {'state': state}
+
+
+@get_by_name_or_uuid_multiple([('alarm', 'alarm_id')])
+@send('get')
+def alarm_state_get(alarm_id, **kwargs):
+    url = '/alarms/{}/state'.format(alarm_id)
+    return url, None
diff --git a/_modules/aodhv2/arg_converter.py b/_modules/aodhv2/arg_converter.py
new file mode 100644
index 0000000..ee6937b
--- /dev/null
+++ b/_modules/aodhv2/arg_converter.py
@@ -0,0 +1,47 @@
+import uuid
+from aodhv2 import common
+from aodhv2 import queries
+
+
+class CheckId(object):
+    def check_id(self, val):
+        try:
+            return str(uuid.UUID(val)).replace('-', '') == val
+        except (TypeError, ValueError, AttributeError):
+            return False
+
+
+resource_lists = {
+    'alarm': queries.query_post,
+}
+
+
+def get_by_name_or_uuid_multiple(resource_arg_name_pairs):
+    def wrap(func):
+        def wrapped_f(*args, **kwargs):
+            results = []
+            args_start = 0
+            for index, (resource, arg_name) in enumerate(
+                    resource_arg_name_pairs):
+                if arg_name in kwargs:
+                    ref = kwargs.pop(arg_name, None)
+                else:
+                    ref = args[index]
+                    args_start += 1
+                cloud_name = kwargs['cloud_name']
+                checker = CheckId()
+                if checker.check_id(ref):
+                    results.append(ref)
+                else:
+                    # Then we have name not uuid
+                    resp = resource_lists[resource](
+                        name=ref, cloud_name=cloud_name)
+                    if len(resp) == 0:
+                        raise common.ResourceNotFound(resource, ref)
+                    elif len(resp) > 1:
+                        raise common.MultipleResourcesFound(resource, ref)
+                    results.append(resp[0]['alarm_id'])
+                results.extend(args[args_start:])
+            return func(*results, **kwargs)
+        return wrapped_f
+    return wrap
diff --git a/_modules/aodhv2/common.py b/_modules/aodhv2/common.py
new file mode 100644
index 0000000..e507457
--- /dev/null
+++ b/_modules/aodhv2/common.py
@@ -0,0 +1,103 @@
+import logging
+import os_client_config
+
+log = logging.getLogger(__name__)
+
+
+class AodhException(Exception):
+
+    _msg = "Aodh module exception occured."
+
+    def __init__(self, message=None, **kwargs):
+        super(AodhException, self).__init__(message or self._msg)
+
+
+class NoAodhEndpoint(AodhException):
+    _msg = "Aodh endpoint not found in keystone catalog."
+
+
+class NoAuthPluginConfigured(AodhException):
+    _msg = ("You are using keystoneauth auth plugin that does not support "
+            "fetching endpoint list from token (noauth or admin_token).")
+
+
+class NoCredentials(AodhException):
+    _msg = "Please provide cloud name present in clouds.yaml."
+
+
+class ResourceNotFound(AodhException):
+    _msg = "Uniq resource: {resource} with name: {name} not found."
+
+    def __init__(self, resource, name, **kwargs):
+        super(AodhException, self).__init__(
+            self._msg.format(resource=resource, name=name))
+
+
+class MultipleResourcesFound(AodhException):
+    _msg = "Multiple resource: {resource} with name: {name} found."
+
+    def __init__(self, resource, name, **kwargs):
+        super(AodhException, self).__init__(
+            self._msg.format(resource=resource, name=name))
+
+
+def _get_raw_client(cloud_name):
+    service_type = 'alarming'
+    config = os_client_config.OpenStackConfig()
+    cloud = config.get_one_cloud(cloud_name)
+    api_version = 'v2'
+    try:
+        # NOTE(pas-ha) for Queens and later,
+        # 'version' kwarg in absent for Pike and older
+        adapter = cloud.get_session_client(service_type, version=api_version)
+    except TypeError:
+        adapter = cloud.get_session_client(service_type)
+        adapter.version = api_version
+    try:
+        access_info = adapter.session.auth.get_access(adapter.session)
+        endpoints = access_info.service_catalog.get_endpoints()
+    except (AttributeError, ValueError):
+        e = NoAuthPluginConfigured()
+        log.exception('%s' % e)
+        raise e
+    if service_type not in endpoints:
+        if not service_type:
+            e = NoAodhEndpoint()
+            log.error('%s' % e)
+            raise e
+    return adapter
+
+
+def send(method, microversion_header=None):
+    def wrap(func):
+        def wrapped_f(*args, **kwargs):
+            headers = kwargs.pop('headers', {})
+            if kwargs.get('microversion'):
+                headers.setdefault(microversion_header,
+                                   kwargs.get('microversion'))
+            cloud_name = kwargs.pop('cloud_name')
+            if not cloud_name:
+                e = NoCredentials()
+                log.error('%s' % e)
+                raise e
+            adapter = _get_raw_client(cloud_name)
+            # Remove salt internal kwargs
+            kwarg_keys = list(kwargs.keys())
+            for k in kwarg_keys:
+                if k.startswith('__'):
+                    kwargs.pop(k)
+            url, json = func(*args, **kwargs)
+            if json:
+                response = getattr(adapter, method)(url, headers=headers,
+                                                    json=json)
+            else:
+                response = getattr(adapter, method)(url, headers=headers)
+            if not response.content:
+                return {}
+            try:
+                resp = response.json()
+            except:
+                resp = response.content
+            return resp
+        return wrapped_f
+    return wrap
\ No newline at end of file
diff --git a/_modules/aodhv2/lists.py b/_modules/aodhv2/lists.py
new file mode 100644
index 0000000..708d4c1
--- /dev/null
+++ b/_modules/aodhv2/lists.py
@@ -0,0 +1,12 @@
+from aodhv2.common import send
+
+try:
+    from urllib.parse import urlencode
+except ImportError:
+    from urllib import urlencode
+
+
+@send('get')
+def alarm_list(**kwargs):
+    url = '/alarms'
+    return url, None
\ No newline at end of file
diff --git a/_modules/aodhv2/queries.py b/_modules/aodhv2/queries.py
new file mode 100644
index 0000000..df7b5b6
--- /dev/null
+++ b/_modules/aodhv2/queries.py
@@ -0,0 +1,11 @@
+from aodhv2.common import send
+
+
+# NOTE(opetrenko): currently we support only by name filtration
+@send('post')
+def query_post(name, **kwargs):
+    url = '/query/alarms'
+    json = {
+        'filter': "{\"=\":{\"name\": \"%s\"}}" % name
+    }
+    return url, json