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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 <vespa/document/bucket/bucketid.h>
#include <vespa/document/bucket/bucketspace.h>
#include <vespa/persistence/spi/bucketinfo.h>
#include <vespa/vespalib/stllike/hash_map.h>
#include <vespa/vespalib/stllike/hash_set.h>
namespace storage::spi { struct PersistenceProvider; }
namespace search::bmcluster {
/*
* Class representing a snapshot of bucket db below SPI for a single node and a single bucket space
*/
class BucketDbSnapshot
{
using BucketInfoMap = vespalib::hash_map<document::BucketId, storage::spi::BucketInfo, document::BucketId::hash>;
BucketInfoMap _buckets;
public:
using BucketIdSet = vespalib::hash_set<document::BucketId, document::BucketId::hash>;
BucketDbSnapshot();
BucketDbSnapshot(const BucketDbSnapshot &) = delete;
BucketDbSnapshot & operator=(const BucketDbSnapshot &) = delete;
BucketDbSnapshot(BucketDbSnapshot &&) noexcept = default;
BucketDbSnapshot & operator=(BucketDbSnapshot &&) noexcept = default;
~BucketDbSnapshot();
void populate(document::BucketSpace bucket_space, storage::spi::PersistenceProvider& provider);
uint32_t count_new_documents(const BucketDbSnapshot &old) const;
void populate_bucket_id_set(BucketIdSet& buckets) const;
const storage::spi::BucketInfo* try_get_bucket_info(document::BucketId bucket_id) const;
};
}
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