| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you 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. |
| |
| #include "master/contender/standalone.hpp" |
| |
| #include <mesos/master/contender.hpp> |
| |
| #include <process/future.hpp> |
| |
| using namespace process; |
| |
| namespace mesos { |
| namespace master { |
| namespace contender { |
| |
| StandaloneMasterContender::~StandaloneMasterContender() |
| { |
| if (promise != nullptr) { |
| promise->set(Nothing()); // Leadership lost. |
| delete promise; |
| } |
| } |
| |
| |
| void StandaloneMasterContender::initialize(const MasterInfo& masterInfo) |
| { |
| // We don't really need to store the master in this basic |
| // implementation so we just restore an 'initialized' flag to make |
| // sure it is called. |
| initialized = true; |
| } |
| |
| |
| Future<Future<Nothing>> StandaloneMasterContender::contend() |
| { |
| if (!initialized) { |
| return Failure("Initialize the contender first"); |
| } |
| |
| if (promise != nullptr) { |
| LOG(INFO) << "Withdrawing the previous membership before recontending"; |
| promise->set(Nothing()); |
| delete promise; |
| } |
| |
| // Directly return a future that is always pending because it |
| // represents a membership/leadership that is not going to be lost |
| // until we 'withdraw'. |
| promise = new Promise<Nothing>(); |
| return promise->future(); |
| } |
| |
| } // namespace contender { |
| } // namespace master { |
| } // namespace mesos { |