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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "simpleconfigretriever.h"
#include "configsnapshot.h"
#include <vespa/vespalib/util/thread.h>
#include <vespa/vespalib/util/runnable.h>
#include <atomic>
namespace config {
class SimpleConfigurable
{
public:
virtual ~SimpleConfigurable() { }
virtual void configure(const ConfigSnapshot & snapshot) = 0;
};
/**
* A SimpleConfigurer runs in its own thread, uses a SimpleConfigRetriever to retrieve configs, and
* performs a callback whenever a newsnapshot is ready.
*/
class SimpleConfigurer : public vespalib::Runnable
{
public:
SimpleConfigurer(SimpleConfigRetriever::UP retriever, SimpleConfigurable * const configurable);
~SimpleConfigurer();
/**
* Start the configurer thread. configure() is guaranteed to be called
* before this method returns.
*/
void start();
/**
* Close the configurer. This will close the retriever as well!
*/
void close();
void run() override;
private:
void runConfigure();
SimpleConfigRetriever::UP _retriever;
SimpleConfigurable * const _configurable;
std::thread _thread;
std::atomic<bool> _started;
};
} // namespace config
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