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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include <vespa/searchcore/proton/attribute/attribute_usage_stats.h>
#include <vespa/searchcore/proton/server/i_disk_mem_usage_listener.h>
#include <vespa/persistence/spi/resource_usage.h>
#include <vespa/vespalib/stllike/hash_map.h>
#include <mutex>
#include <memory>
#include <vector>
namespace storage::spi { class IResourceUsageListener; }
namespace vespalib { class IDestructorCallback; }
namespace proton {
class DiskMemUsageState;
class IAttributeUsageListener;
class IDiskMemUsageNotifier;
/*
* Class tracking resource usage for persistence provider.
*/
class ResourceUsageTracker : public std::enable_shared_from_this<ResourceUsageTracker>, public IDiskMemUsageListener
{
class ListenerGuard;
class AttributeUsageListener;
mutable std::mutex _lock;
storage::spi::ResourceUsage _resource_usage;
storage::spi::IResourceUsageListener* _listener;
IDiskMemUsageNotifier& _disk_mem_usage_notifier;
vespalib::hash_map<vespalib::string, AttributeUsageStats> _attribute_usage;
vespalib::string _attribute_address_space_max_document_type;
void remove_listener();
void remove_document_type(const vespalib::string &document_type);
void notify_attribute_usage(const vespalib::string &document_type, const AttributeUsageStats &attribute_usage);
bool scan_attribute_usage(bool force_changed, std::lock_guard<std::mutex>&);
public:
ResourceUsageTracker(IDiskMemUsageNotifier& notifier);
~ResourceUsageTracker() override;
storage::spi::ResourceUsage get_resource_usage() const;
void notifyDiskMemUsage(DiskMemUsageState state) override;
std::unique_ptr<vespalib::IDestructorCallback> set_listener(storage::spi::IResourceUsageListener& listener);
std::unique_ptr<IAttributeUsageListener> make_attribute_usage_listener(const vespalib::string &document_type);
};
}
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