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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 "i_disk_mem_usage_notifier.h"
#include "i_disk_mem_usage_listener.h"
#include <vespa/searchcorespi/index/i_thread_service.h>
#include <vector>
#include <mutex>
namespace proton {
/**
* Forwarder for disk/memory usage state changes. Notification is forwarded
* as a task run by the supplied executor.
*/
class DiskMemUsageForwarder : public IDiskMemUsageNotifier,
public IDiskMemUsageListener
{
searchcorespi::index::IThreadService &_executor;
std::vector<IDiskMemUsageListener *> _listeners;
std::mutex _lock;
DiskMemUsageState _state;
void forward(DiskMemUsageState state);
public:
DiskMemUsageForwarder(searchcorespi::index::IThreadService &executor);
~DiskMemUsageForwarder() override;
void addDiskMemUsageListener(IDiskMemUsageListener *listener) override;
void removeDiskMemUsageListener(IDiskMemUsageListener *listener) override;
void notifyDiskMemUsage(DiskMemUsageState state) override;
};
} // namespace proton
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