dcaepolicy plugin and dcae.node.type

* new plugin and node type file to be used by blueprints that use policy

Change-Id: I79dc24f3bf6f8471457544f6bb8562cbcd448d00
Issue-Id: DCAEGEN2-62
Signed-off-by: Alex Shatov <alexs@att.com>

1 files changed, 86 insertions, 0 deletions

diff --git a/dcae-policy/dcaepolicyplugin/tasks.py b/dcae-policy/dcaepolicyplugin/tasks.py
new file mode 100644
index 0000000..7b5ea1f
--- /dev/null
+++ b/dcae-policy/dcaepolicyplugin/tasks.py
@@ -0,0 +1,86 @@
+# ============LICENSE_START=======================================================
+# org.onap.dcae
+# ================================================================================
+# Copyright (c) 2017 AT&T Intellectual Property. All rights reserved.
+# ================================================================================
+# Licensed 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
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ============LICENSE_END=========================================================
+#
+# ECOMP is a trademark and service mark of AT&T Intellectual Property.
+
+# Lifecycle interface calls for DockerContainer
+
+import json
+import uuid
+
+import requests
+
+from cloudify import ctx
+from cloudify.decorators import operation
+from cloudify.context import NODE_INSTANCE
+from cloudify.exceptions import NonRecoverableError
+
+from .discovery import discover_service_url
+
+SERVICE_NAME_POLICY_HANDLER = "policy_handler"
+X_ECOMP_REQUESTID = 'X-ECOMP-RequestID'
+POLICY_ID = 'policy_id'
+POLICY_REQUIRED = 'policy_required'
+POLICY_BODY = 'policy_body'
+DCAE_POLICY_TYPE = 'dcae.nodes.policy'
+
+POLICY_HANDLER_URL = discover_service_url(SERVICE_NAME_POLICY_HANDLER)
+
+def _get_latest_policy(policy_id):
+    """retrieve the latest policy for policy_id from policy-handler"""
+    ph_path = "{0}/policy_latest/{1}".format(POLICY_HANDLER_URL, policy_id)
+    headers = {X_ECOMP_REQUESTID: str(uuid.uuid4())}
+
+    ctx.logger.info("getting latest policy from {0} headers={1}".format( \
+        ph_path, json.dumps(headers)))
+    res = requests.get(ph_path, headers=headers)
+    res.raise_for_status()
+
+    if res.status_code == requests.codes.ok:
+        return res.json()
+    return {}
+
+#########################################################
+@operation
+def policy_get(**kwargs):
+    """retrieve the latest policy_body for policy_id property and save it in runtime_properties"""
+    if ctx.type != NODE_INSTANCE or DCAE_POLICY_TYPE not in ctx.node.type_hierarchy:
+        error = "can only invoke policy_get on node of type {0}".format(DCAE_POLICY_TYPE)
+        ctx.logger.error(error)
+        raise NonRecoverableError(error)
+
+    if POLICY_ID not in ctx.node.properties:
+        error = "no {0} found in ctx.node.properties".format(POLICY_ID)
+        ctx.logger.error(error)
+        raise NonRecoverableError(error)
+
+    try:
+        policy_id = ctx.node.properties[POLICY_ID]
+        policy = _get_latest_policy(policy_id)
+        if not policy:
+            raise NonRecoverableError("policy not found for policy_id {0}".format(policy_id))
+
+        ctx.logger.info("found policy {0}".format(json.dumps(policy)))
+        if POLICY_BODY in policy:
+            ctx.instance.runtime_properties[POLICY_BODY] = policy[POLICY_BODY]
+
+    except Exception as ex:
+        error = "failed to get policy: {0}".format(str(ex))
+        ctx.logger.error(error)
+        if ctx.node.properties.get(POLICY_REQUIRED, True):
+            raise NonRecoverableError(error)