Matteo Scandolo | 9ce1825 | 2017-06-22 10:48:25 -0700 | [diff] [blame^] | 1 | from toscaparser.tosca_template import ToscaTemplate |
| 2 | from default import TOSCA_RECIPES_DIR |
| 3 | from resources import RESOURCES |
| 4 | from grpc._channel import _Rendezvous |
| 5 | |
| 6 | class TOSCA_Parser: |
| 7 | |
| 8 | def compute_dependencies(self): |
| 9 | nodetemplates_by_name = {} |
| 10 | for nodetemplate in self.template.nodetemplates: |
| 11 | nodetemplates_by_name[nodetemplate.name] = nodetemplate |
| 12 | |
| 13 | self.nodetemplates_by_name = nodetemplates_by_name |
| 14 | |
| 15 | for nodetemplate in self.template.nodetemplates: |
| 16 | nodetemplate.dependencies = [] |
| 17 | nodetemplate.dependencies_names = [] |
| 18 | for reqs in nodetemplate.requirements: |
| 19 | for (k,v) in reqs.items(): |
| 20 | name = v["node"] |
| 21 | if (name in nodetemplates_by_name): |
| 22 | nodetemplate.dependencies.append(nodetemplates_by_name[name]) |
| 23 | nodetemplate.dependencies_names.append(name) |
| 24 | |
| 25 | # go another level deep, as our requirements can have requirements... |
| 26 | for sd_req in v.get("requirements",[]): |
| 27 | for (sd_req_k, sd_req_v) in sd_req.items(): |
| 28 | name = sd_req_v["node"] |
| 29 | if (name in nodetemplates_by_name): |
| 30 | nodetemplate.dependencies.append(nodetemplates_by_name[name]) |
| 31 | nodetemplate.dependencies_names.append(name) |
| 32 | |
| 33 | def topsort_dependencies(self): |
| 34 | # stolen from observer |
| 35 | g = self.nodetemplates_by_name |
| 36 | |
| 37 | # Get set of all nodes, including those without outgoing edges |
| 38 | keys = set(g.keys()) |
| 39 | values = set({}) |
| 40 | for v in g.values(): |
| 41 | values = values | set(v.dependencies_names) |
| 42 | |
| 43 | all_nodes = list(keys | values) |
| 44 | steps = all_nodes |
| 45 | |
| 46 | |
| 47 | # Final order |
| 48 | order = [] |
| 49 | |
| 50 | # DFS stack, not using recursion |
| 51 | stack = [] |
| 52 | |
| 53 | # Unmarked set |
| 54 | unmarked = all_nodes |
| 55 | |
| 56 | # visiting = [] - skip, don't expect 1000s of nodes, |E|/|V| is small |
| 57 | |
| 58 | while unmarked: |
| 59 | stack.insert(0, unmarked[0]) # push first unmarked |
| 60 | |
| 61 | while (stack): |
| 62 | n = stack[0] |
| 63 | add = True |
| 64 | try: |
| 65 | for m in g[n].dependencies_names: |
| 66 | if (m in unmarked): |
| 67 | add = False |
| 68 | stack.insert(0, m) |
| 69 | except KeyError: |
| 70 | pass |
| 71 | if (add): |
| 72 | if (n in steps and n not in order): |
| 73 | order.append(n) |
| 74 | item = stack.pop(0) |
| 75 | try: |
| 76 | unmarked.remove(item) |
| 77 | except ValueError: |
| 78 | pass |
| 79 | |
| 80 | noorder = list(set(steps) - set(order)) |
| 81 | return order + noorder |
| 82 | |
| 83 | def execute(self): |
| 84 | for nodetemplate in self.ordered_nodetemplates: |
| 85 | self.execute_nodetemplate(nodetemplate) |
| 86 | |
| 87 | def execute_nodetemplate(self, nodetemplate): |
| 88 | node_class = nodetemplate.type.replace("tosca.nodes.", "") |
| 89 | if node_class not in RESOURCES: |
| 90 | raise Exception("Nodetemplate %s's type %s is not a known resource" % (nodetemplate.name, node_class)) |
| 91 | |
| 92 | # find the class corresponding to a node |
| 93 | cls = RESOURCES[node_class] |
| 94 | |
| 95 | |
| 96 | # read properties from TOSCA |
| 97 | data = nodetemplate.templates[nodetemplate.name]['properties'] |
| 98 | |
| 99 | TOSCA_Parser.creat_or_update(cls, data) |
| 100 | |
| 101 | @staticmethod |
| 102 | def populate_model(model, data): |
| 103 | for k,v in data.iteritems(): |
| 104 | setattr(model, k, v) |
| 105 | return model |
| 106 | |
| 107 | @staticmethod |
| 108 | def creat_or_update(cls, data): |
| 109 | |
| 110 | # default case |
| 111 | if data.get('name'): |
| 112 | used_key = 'name' |
| 113 | else: |
| 114 | used_key = data.keys()[0] |
| 115 | |
| 116 | models = cls.objects.filter(**{used_key: data[used_key]}) |
| 117 | |
| 118 | if len(models) == 1: |
| 119 | print "[XOS-Tosca] Model %s already exist, updating..." % data[used_key] |
| 120 | model = models[0] |
| 121 | elif len(models) == 0: |
| 122 | model = cls.objects.new() |
| 123 | print "[XOS-Tosca] Model %s is new, creating..." % data[used_key] |
| 124 | else: |
| 125 | raise Exception("[XOS-Tosca] Model %s has multiple instances, I can't handle it" % data[used_key]) |
| 126 | |
| 127 | model = TOSCA_Parser.populate_model(model, data) |
| 128 | model.save() |
| 129 | |
| 130 | |
| 131 | @staticmethod |
| 132 | def _translate_exception(msg): |
| 133 | readable = [] |
| 134 | for line in msg.splitlines(): |
| 135 | print line |
| 136 | if line.strip().startswith('MissingRequiredFieldError'): |
| 137 | readable.append(line) |
| 138 | |
| 139 | if len(readable) > 0: |
| 140 | return '/n'.join(readable) |
| 141 | else: |
| 142 | return msg |
| 143 | |
| 144 | def __init__(self, recipe): |
| 145 | |
| 146 | self.template = None |
| 147 | self.nodetemplates_by_name = None |
| 148 | self.ordered_nodetemplates = [] |
| 149 | self.ordered_names = None |
| 150 | |
| 151 | tmp_file_path = TOSCA_RECIPES_DIR + '/tmp.yaml' |
| 152 | |
| 153 | # write the receive recipe in a tmp file |
| 154 | tmp_file = open(tmp_file_path, 'w') |
| 155 | tmp_file.write(recipe) |
| 156 | tmp_file.close() |
| 157 | |
| 158 | try: |
| 159 | self.template = ToscaTemplate(tmp_file_path) |
| 160 | self.compute_dependencies() |
| 161 | self.ordered_names = self.topsort_dependencies() |
| 162 | for name in self.ordered_names: |
| 163 | if name in self.nodetemplates_by_name: |
| 164 | self.ordered_nodetemplates.append(self.nodetemplates_by_name[name]) |
| 165 | |
| 166 | self.execute() |
| 167 | |
| 168 | except Exception as e: |
| 169 | print e |
| 170 | import sys, os |
| 171 | exc_type, exc_obj, exc_tb = sys.exc_info() |
| 172 | fname = os.path.split(exc_tb.tb_frame.f_code.co_filename)[1] |
| 173 | print(exc_type, fname, exc_tb.tb_lineno) |
| 174 | raise Exception(self._translate_exception(e.message)) |
| 175 | |
| 176 | |