Add change vnf flavour api

Change-Id: I2f8a3f8fdf9c22cb9407f1403c53bea6c75aae34
Issue-ID: VFC-1306
Signed-off-by: fujinhua <fu.jinhua@zte.com.cn>

2 files changed, 136 insertions, 0 deletions

diff --git a/lcm/lcm/nf/serializers/change_vnf_flavour_request.py b/lcm/lcm/nf/serializers/change_vnf_flavour_request.py
new file mode 100644
index 00000000..5d903a92
--- /dev/null
+++ b/lcm/lcm/nf/serializers/change_vnf_flavour_request.py
@@ -0,0 +1,63 @@
+# Copyright (C) 2019 ZTE. 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.
+
+from rest_framework import serializers
+from .ext_virtual_link_data import ExtVirtualLinkDataSerizlizer
+from .vim_connection_info import VimConnectionInfoSerializer
+from .ext_managed_virtual_link_data import ExtManagedVirtualLinkDataSerizlizer
+
+
+class ChangeVnfFlavourRequestSerializer(serializers.Serializer):
+    newFlavourId = serializers.CharField(
+        help_text="Identifier of the VNF deployment flavour to be instantiated.",
+        required=True,
+        allow_null=False,
+        allow_blank=False
+    )
+    instantiationLevelId = serializers.CharField(
+        help_text="Identifier of the instantiation level of the deployment flavour to be instantiated. " +
+        "If not present, the default instantiation level as declared in the VNFD is instantiated.",
+        required=False,
+        allow_blank=True,
+        allow_null=True
+    )
+    extVirtualLinks = ExtVirtualLinkDataSerizlizer(
+        help_text="Information about external VLs to connect the VNF to.",
+        many=True,
+        required=False,
+        allow_null=True
+    )
+    extManagedVirtualLinks = ExtManagedVirtualLinkDataSerizlizer(
+        help_text="Information about internal VLs that are managed by the NFVO.",
+        many=True,
+        required=False,
+        allow_null=True
+    )
+    vimConnectionInfo = VimConnectionInfoSerializer(
+        help_text="Information about VIM connections to be used for managing " +
+        "the resources for the VNF instance, " +
+        "or refer to external / externally-managed virtual links." +
+        "This attribute shall only be supported and may be present if VNF-related " +
+        "resource management in direct mode is applicable.",
+        many=True,
+        required=False,
+        allow_null=True
+    )
+    additionalParams = serializers.DictField(
+        help_text="Additional input parameters for the flavour change process, " +
+        "specific to the VNF being modified, " +
+        "as declared in the VNFD as part of 'ChangeVnfFlavourOpConfig'.",
+        required=False,
+        allow_null=True
+    )
diff --git a/lcm/lcm/nf/views/change_vnf_flavour_view.py b/lcm/lcm/nf/views/change_vnf_flavour_view.py
new file mode 100644
index 00000000..732a42ac
--- /dev/null
+++ b/lcm/lcm/nf/views/change_vnf_flavour_view.py
@@ -0,0 +1,73 @@
+# Copyright 2019 ZTE Corporation.
+#
+# 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.
+
+import logging
+
+from drf_yasg.utils import swagger_auto_schema
+from rest_framework import status
+from rest_framework.response import Response
+from rest_framework.views import APIView
+
+from lcm.nf.serializers.change_vnf_flavour_request import ChangeVnfFlavourRequestSerializer
+from lcm.nf.serializers.response import ProblemDetailsSerializer
+from lcm.pub.exceptions import NFLCMException
+from lcm.pub.exceptions import NFLCMExceptionNotFound
+from lcm.pub.exceptions import NFLCMExceptionConflict
+from lcm.pub.utils.jobutil import JobUtil
+from lcm.pub.database.models import NfInstModel
+from lcm.nf.const import VNF_STATUS
+from .common import view_safe_call_with_log
+
+logger = logging.getLogger(__name__)
+
+
+class ChangeVnfFlavourView(APIView):
+    @swagger_auto_schema(
+        request_body=ChangeVnfFlavourRequestSerializer(),
+        responses={
+            status.HTTP_202_ACCEPTED: "Empty",
+            status.HTTP_404_NOT_FOUND: ProblemDetailsSerializer(),
+            status.HTTP_409_CONFLICT: ProblemDetailsSerializer(),
+            status.HTTP_500_INTERNAL_SERVER_ERROR: ProblemDetailsSerializer()
+        }
+    )
+    @view_safe_call_with_log(logger=logger)
+    def post(self, request, instanceid):
+        logger.debug("ChangeVnfFlavour--post::> %s" % request.data)
+
+        chg_flavour_serializer = ChangeVnfFlavourRequestSerializer(data=request.data)
+        if not chg_flavour_serializer.is_valid():
+            raise NFLCMException(chg_flavour_serializer.errors)
+
+        job_id = JobUtil.create_job('NF', 'CHG_VNF_FLAVOUR', instanceid)
+        JobUtil.add_job_status(job_id, 0, "CHG_VNF_FLAVOUR_READY")
+        self.chg_flavour_pre_check(instanceid, job_id)
+
+        # TODO: call biz logic
+
+        response = Response(data={"jobId": job_id},
+                            status=status.HTTP_202_ACCEPTED)
+        return response
+
+    def chg_flavour_pre_check(self, nf_inst_id, job_id):
+        vnf_insts = NfInstModel.objects.filter(nfinstid=nf_inst_id)
+        if not vnf_insts.exists():
+            raise NFLCMExceptionNotFound("VNF nf_inst_id does not exist.")
+
+        if vnf_insts[0].status != 'INSTANTIATED':
+            raise NFLCMExceptionConflict("VNF instantiationState is not INSTANTIATED.")
+
+        vnf_insts.update(status=VNF_STATUS.UPDATING)
+        JobUtil.add_job_status(job_id, 15, 'Nf change vnf flavour pre-check finish')
+        logger.info("Nf change vnf flavour pre-check finish")