107 lines
3.1 KiB
Python
107 lines
3.1 KiB
Python
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# python3
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# Copyright 2019 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Producers based on yaml files."""
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import os
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import threading
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from typing import Dict
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from typing import List
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import yaml
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from benchmarks.harness import machine
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from benchmarks.harness.machine_producers import machine_producer
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class YamlMachineProducer(machine_producer.MachineProducer):
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"""Loads machines from a yaml file."""
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def __init__(self, path: str):
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self.machines = build_machines(path)
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self.max_machines = len(self.machines)
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self.machine_condition = threading.Condition()
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def get_machines(self, num_machines: int) -> List[machine.Machine]:
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if num_machines > self.max_machines:
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raise ValueError(
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"Insufficient Ammount of Machines. {ask} asked for and have {max_num} max."
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.format(ask=num_machines, max_num=self.max_machines))
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with self.machine_condition:
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while not self._enough_machines(num_machines):
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self.machine_condition.wait(timeout=1)
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return [self.machines.pop(0) for _ in range(num_machines)]
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def release_machines(self, machine_list: List[machine.Machine]):
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with self.machine_condition:
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while machine_list:
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next_machine = machine_list.pop()
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self.machines.append(next_machine)
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self.machine_condition.notify()
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def _enough_machines(self, ask: int):
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return ask <= len(self.machines)
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def build_machines(path: str, num_machines: str = -1) -> List[machine.Machine]:
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"""Builds machine objects defined by the yaml file "path".
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Args:
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path: The path to a yaml file which defines machines.
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num_machines: Optional limit on how many machine objects to build.
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Returns:
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Machine objects in a list.
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If num_machines is set, len(machines) <= num_machines.
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"""
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data = parse_yaml(path)
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machines = []
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for key, value in data.items():
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if len(machines) == num_machines:
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return machines
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if isinstance(value, dict):
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machines.append(machine.RemoteMachine(key, **value))
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else:
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machines.append(machine.LocalMachine(key))
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return machines
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def parse_yaml(path: str) -> Dict[str, Dict[str, str]]:
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"""Parse the yaml file pointed by path.
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Args:
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path: The path to yaml file.
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Returns:
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The contents of the yaml file as a dictionary.
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"""
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data = get_file_contents(path)
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return yaml.load(data, Loader=yaml.Loader)
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def get_file_contents(path: str) -> str:
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"""Dumps the file contents to a string and returns them.
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Args:
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path: The path to dump.
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Returns:
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The file contents as a string.
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"""
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if not os.path.isabs(path):
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path = os.path.abspath(path)
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with open(path) as input_file:
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return input_file.read()
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