rwlaunchpad/plugins/rwpkgmgr/rift/tasklets/rwpkgmgr/rpc.py

   1 #
   2 #   Copyright 2016 RIFT.IO Inc
   3 #
   4 #   Licensed under the Apache License, Version 2.0 (the "License");
   5 #   you may not use this file except in compliance with the License.
   6 #   You may obtain a copy of the License at
   7 #
   8 #       http://www.apache.org/licenses/LICENSE-2.0
   9 #
  10 #   Unless required by applicable law or agreed to in writing, software
  11 #   distributed under the License is distributed on an "AS IS" BASIS,
  12 #   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13 #   See the License for the specific language governing permissions and
  14 #   limitations under the License.
  15 #
  16 # Author(s): Varun Prasad
  17 # Creation Date: 09/25/2016
  18 #
  19
  20 import abc
  21 import asyncio
  22 import tempfile
  23
  24 from gi.repository import (
  25    RwDts as rwdts,
  26    RwPkgMgmtYang)
  27 import rift.tasklets
  28 import rift.mano.dts as mano_dts
  29
  30 from . import downloader as pkg_downloader
  31
  32 # Shortcuts
  33 RPC_PKG_ENDPOINT = RwPkgMgmtYang.YangOutput_RwPkgMgmt_GetPackageEndpoint
  34 RPC_SCHEMA_ENDPOINT = RwPkgMgmtYang.YangOutput_RwPkgMgmt_GetPackageSchema
  35 RPC_PACKAGE_ADD_ENDPOINT = RwPkgMgmtYang.YangOutput_RwPkgMgmt_PackageFileAdd
  36 RPC_PACKAGE_DELETE_ENDPOINT = RwPkgMgmtYang.YangOutput_RwPkgMgmt_PackageFileDelete
  37 RPC_PACKAGE_COPY_ENDPOINT = RwPkgMgmtYang.YangOutput_RwPkgMgmt_PackageCopy
  38
  39
  40 class EndpointDiscoveryRpcHandler(mano_dts.AbstractRpcHandler):
  41     """RPC handler to generate the endpoint for the Package manager."""
  42
  43     def __init__(self, log, dts, loop, proxy):
  44         """
  45         Args:
  46             proxy: Any impl of .proxy.AbstractPackageManagerProxy
  47         """
  48         super().__init__(log, dts, loop)
  49         self.proxy = proxy
  50
  51     @property
  52     def xpath(self):
  53         return "/rw-pkg-mgmt:get-package-endpoint"
  54
  55     @asyncio.coroutine
  56     def callback(self, ks_path, msg):
  57         """Forwards the request to proxy.
  58         """
  59         url = yield from self.proxy.endpoint(
  60                 msg.package_type,
  61                 msg.package_id)
  62
  63         rpc_op = RPC_PKG_ENDPOINT.from_dict({"endpoint": url})
  64
  65         return rpc_op
  66
  67
  68 class SchemaRpcHandler(mano_dts.AbstractRpcHandler):
  69     """RPC handler to generate the schema for the packages.
  70     """
  71     def __init__(self, log, dts, loop, proxy):
  72         """
  73         Args:
  74             proxy: Any impl of .proxy.AbstractPackageManagerProxy
  75         """
  76         super().__init__(log, dts, loop)
  77         self.proxy = proxy
  78
  79     @property
  80     def xpath(self):
  81         return "/rw-pkg-mgmt:get-package-schema"
  82
  83     @asyncio.coroutine
  84     def callback(self, ks_path, msg):
  85
  86         package_type = msg.package_type.lower()
  87         schema = yield from self.proxy.schema(msg.package_type)
  88
  89         rpc_op = RPC_SCHEMA_ENDPOINT()
  90         for dirname in schema:
  91             rpc_op.schema.append(dirname)
  92
  93         return rpc_op
  94
  95
  96 class PackageOperationsRpcHandler(mano_dts.AbstractRpcHandler):
  97     """File add RPC
  98
  99     Steps:
 100     1. For a request, we schedule a download in the background
 101     2. We register the downloader to a publisher to push out the download status
 102         Note: The publisher starts the download automatically.
 103     3. Return a tracking ID for the client to monitor the entire status
 104
 105     """
 106     def __init__(self, log, dts, loop, proxy, publisher):
 107         """
 108         Args:
 109             proxy: Any impl of .proxy.AbstractPackageManagerProxy
 110             publisher: Instance of DownloadStatusPublisher
 111         """
 112         super().__init__(log, dts, loop)
 113         self.proxy = proxy
 114         self.publisher = publisher
 115
 116     @property
 117     def xpath(self):
 118         return "/rw-pkg-mgmt:package-file-add"
 119
 120     @asyncio.coroutine
 121     def callback(self, ks_path, msg):
 122         if not msg.external_url:
 123             # For now we will only support External URL download
 124             raise Exception ("No download URL provided")
 125
 126         # Create a tmp file to download the url
 127         # We first store the data in temp and post download finish
 128         # we move the file to actual location.
 129         _, filename = tempfile.mkstemp()
 130
 131         auth = None
 132         if msg.username is not None:
 133             auth = (msg.username, msg.password)
 134
 135         url_downloader = pkg_downloader.PackageFileDownloader.from_rpc_input(
 136                 msg,
 137                 auth=auth,
 138                 file_obj=filename,
 139                 proxy=self.proxy,
 140                 log=self.log)
 141
 142         download_id = yield from self.publisher.register_downloader(url_downloader)
 143
 144         rpc_op = RPC_PACKAGE_ADD_ENDPOINT.from_dict({"task_id": download_id})
 145
 146         return rpc_op
 147
 148 class PackageCopyOperationsRpcHandler(mano_dts.AbstractRpcHandler):
 149     def __init__(self, log, dts, loop, proxy, publisher):
 150         """
 151         Args:
 152             proxy: Any impl of .proxy.AbstractPackageManagerProxy
 153             publisher: CopyStatusPublisher object
 154         """
 155         super().__init__(log, dts, loop)
 156         self.proxy = proxy
 157         self.publisher = publisher
 158
 159     @property
 160     def xpath(self):
 161         return "/rw-pkg-mgmt:package-copy"
 162
 163     @asyncio.coroutine
 164     def callback(self, ks_path, msg):
 165         import uuid
 166         copier = pkg_downloader.PackageFileCopier.from_rpc_input(msg, proxy=self.proxy, log=self.log)
 167
 168         transaction_id, dest_package_id = yield from self.publisher.register_copier(copier)
 169         rpc_op = RPC_PACKAGE_COPY_ENDPOINT.from_dict({
 170             "transaction_id":transaction_id,
 171             "package_id":dest_package_id,
 172             "package_type":msg.package_type})
 173
 174         return rpc_op
 175
 176 class PackageDeleteOperationsRpcHandler(mano_dts.AbstractRpcHandler):
 177     def __init__(self, log, dts, loop, proxy):
 178         """
 179         Args:
 180             proxy: Any impl of .proxy.AbstractPackageManagerProxy
 181         """
 182         super().__init__(log, dts, loop)
 183         self.proxy = proxy
 184
 185     @property
 186     def xpath(self):
 187         return "/rw-pkg-mgmt:package-file-delete"
 188
 189     @asyncio.coroutine
 190     def callback(self, ks_path, msg):
 191
 192         rpc_op = RPC_PACKAGE_DELETE_ENDPOINT.from_dict({"status": str(True)})
 193
 194         try:
 195             package_file_type = msg.vnfd_file_type.lower() \
 196                     if msg.package_type == 'VNFD' else msg.nsd_file_type.lower()
 197             self.proxy.package_file_delete(
 198                 msg.package_type,
 199                 msg.package_id,
 200                 msg.package_path,
 201                 package_file_type)
 202         except Exception as e:
 203             self.log.exception(e)
 204             rpc_op.status = str(False)
 205             rpc_op.error_trace = str(e)
 206
 207         return rpc_op