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// 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
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
#include <string>
#include <vector>
#include <mesos/mesos.hpp>
#include <process/http.hpp>
#include <process/owned.hpp>
#include <stout/error.hpp>
#include <stout/lambda.hpp>
#include <stout/option.hpp>
#include <stout/variant.hpp>
#include "checks/checks_runtime.hpp"
#include "checks/checks_types.hpp"
#include "messages/messages.hpp"
namespace mesos {
namespace internal {
namespace checks {
class CheckerProcess;
class HealthChecker
* Attempts to create a `HealthChecker` object. In case of success, health
* checking starts immediately after initialization.
* The check performed is based off the check type and the given runtime.
* @param healthCheck The protobuf message definition of health check.
* @param launcherDir A directory where Mesos helper binaries are located.
* @param callback A callback HealthChecker uses to send health status
* updates to its owner (usually an executor).
* @param taskId The TaskID of the target task.
* @param runtime The runtime that launched the task.
* @return A `HealthChecker` object or an error if `create` fails.
* @todo A better approach would be to return a stream of updates, e.g.,
* `process::Stream<TaskHealthStatus>` rather than invoking a callback.
* @todo Consider leveraging `checks::Checker` for checking functionality.
* This class will then focus on interpreting and acting on the result.
static Try<process::Owned<HealthChecker>> create(
const HealthCheck& healthCheck,
const std::string& launcherDir,
const lambda::function<void(const TaskHealthStatus&)>& callback,
const TaskID& taskId,
Variant<runtime::Plain, runtime::Docker, runtime::Nested> runtime);
// Idempotent helpers for pausing and resuming health checking.
void pause();
void resume();
const HealthCheck& _healthCheck,
const std::string& launcherDir,
const lambda::function<void(const TaskHealthStatus&)>& _callback,
const TaskID& _taskId,
Variant<runtime::Plain, runtime::Docker, runtime::Nested> runtime);
void processCheckResult(const Try<CheckStatusInfo>& result);
void failure();
void success();
const HealthCheck healthCheck;
const lambda::function<void(const TaskHealthStatus&)> callback;
const TaskID taskId;
const std::string name;
const process::Time startTime;
Duration checkGracePeriod;
uint32_t consecutiveFailures;
bool initializing;
process::Owned<CheckerProcess> process;
} // namespace checks {
} // namespace internal {
} // namespace mesos {
#endif // __HEALTH_CHECKER_HPP__