Add JSON config file

Add a sample JSON config file and a module to read it.

Change-Id: I1e29d7f878605a6bc934dd429a1ffca31475fd71

config.json.sample

@@ -0,0 +1,48 @@
+{
+    "app_address": "x.x.x.x:8000",
+
+    "test_mode": "DOCKER",
+
+    "tempest_url":
+    "https://github.com/openstack/tempest/archive/stable/havana.zip",
+
+    "tempest_config":
+    {
+        "identity":
+        {
+            "uri": "http://x.x.x.x:5000/v2.0/",
+            "uri_v3": "http://x.x.x.x:5000/v3/",
+            "region": "RegionOne",
+            "username": "demo",
+            "tenant_name": "demo",
+            "alt_username": "alt_demo",
+            "alt_tenant_name": "alt_demo",
+            "admin_username": "admin",
+            "admin_tenant_name": "admin"
+        },
+        "compute":
+        {
+            "image_ref": "a8d70acb-f1c4-4171-b0ce-d73e5de21a9d",
+            "image_ref_alt": "6182b1da-e64d-4440-b0ef-c0afa4d77abb",
+            "flavor_ref": "1",
+            "flavor_ref_alt": "1",
+            "image_ssh_user": "root",
+            "image_ssh_password": "password",
+            "image_alt_ssh_user": "root",
+            "image_alt_ssh_password": "password"
+        },
+        "cli":
+        {
+            "enable": "False"
+        }
+    },
+
+    "tempest_testcases":
+    {
+        "testcases":
+        [
+        "tempest.api.compute.admin.test_flavors",
+        "tempest.api.compute.admin.test_availability_zone"
+        ]
+    }
+}

refstack/refstack_config.py

@@ -0,0 +1,62 @@
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+# Copyright 2014 IBM Corp.
+#
+#    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 json
+import os.path
+from refstack.utils import INSTANCE_FOLDER_PATH
+
+
+class RefStackConfig(object):
+    '''Utility class to process config file.'''
+
+    refstack_config = {}
+
+    config_file_name = os.path.join(INSTANCE_FOLDER_PATH, 'config.json')
+
+    working_dir = os.path.join(INSTANCE_FOLDER_PATH, 'tmpfiles')
+    if not os.path.exists(working_dir):
+        os.makedirs(working_dir)
+
+    def __init__(self, file_name=None):
+        '''Load the JSON data from the config file.'''
+        if file_name:
+            self.config_file_name = file_name
+        if os.path.isfile(self.config_file_name):
+            self.refstack_config = json.load(open(self.config_file_name))
+
+    def get_working_dir(self):
+        '''Return working directory.'''
+        return self.working_dir
+
+    def get_app_address(self):
+        '''Return address of the Web App server.'''
+        return self.refstack_config["app_address"]
+
+    def get_tempest_url(self):
+        '''Return the URL for tempest test code download.'''
+        return self.refstack_config["tempest_url"]
+
+    def get_tempest_config(self):
+        '''Return customized tempest config parameters.'''
+        return self.refstack_config["tempest_config"]
+
+    def get_tempest_testcases(self):
+        '''Return a JSON of tempest testcase.'''
+        return self.refstack_config["tempest_testcases"]
+
+    def get_test_mode(self):
+        '''Return the tempest test mode.'''
+        return self.refstack_config["test_mode"]