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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 "stripe_access_guard.h"
namespace storage::lib {
class ClusterState;
class ClusterStateBundle;
class Distribution;
}
namespace storage { class DistributorConfiguration; }
namespace vespalib::xml { class XmlOutputStream; }
namespace storage::distributor {
class NodeSupportedFeaturesRepo;
/**
* A tickable stripe is the minimal binding glue between the stripe's worker thread and
* the actual implementation. Primarily allows for easier testing without having to
* fake an entire actual DistributorStripe.
*/
class TickableStripe {
public:
using OutdatedNodes = dbtransition::OutdatedNodes;
virtual ~TickableStripe() = default;
// Perform a single operation tick of the stripe logic.
// If function returns true, the caller should not perform any waiting before calling
// tick() again. This generally means that the stripe is processing client operations
// and wants to continue doing so as quickly as possible.
// Only used for multi-threaded striped setups.
// TODO return an enum indicating type of last processed event? E.g. external, maintenance, none, ...
virtual bool tick() = 0;
virtual void flush_and_close() = 0;
virtual void update_total_distributor_config(std::shared_ptr<const DistributorConfiguration> config) = 0;
virtual void update_distribution_config(const BucketSpaceDistributionConfigs& new_configs) = 0;
virtual void set_pending_cluster_state_bundle(const lib::ClusterStateBundle& pending_state) = 0;
virtual void clear_pending_cluster_state_bundle() = 0;
virtual void enable_cluster_state_bundle(const lib::ClusterStateBundle& new_state,
bool has_bucket_ownership_change) = 0;
virtual void notify_distribution_change_enabled() = 0;
virtual PotentialDataLossReport remove_superfluous_buckets(document::BucketSpace bucket_space,
const lib::ClusterState& new_state,
bool is_distribution_change) = 0;
virtual void merge_entries_into_db(document::BucketSpace bucket_space,
api::Timestamp gathered_at_timestamp,
const lib::Distribution& distribution,
const lib::ClusterState& new_state,
const char* storage_up_states,
const OutdatedNodes & outdated_nodes,
const std::vector<dbtransition::Entry>& entries) = 0;
virtual void update_read_snapshot_before_db_pruning() = 0;
virtual void update_read_snapshot_after_db_pruning(const lib::ClusterStateBundle& new_state) = 0;
virtual void update_read_snapshot_after_activation(const lib::ClusterStateBundle& activated_state) = 0;
virtual void clear_read_only_bucket_repo_databases() = 0;
virtual void update_node_supported_features_repo(std::shared_ptr<const NodeSupportedFeaturesRepo> features_repo) = 0;
// Functions used for state reporting
virtual void report_bucket_db_status(document::BucketSpace bucket_space, std::ostream& out) const = 0;
virtual StripeAccessGuard::PendingOperationStats pending_operation_stats() const = 0;
virtual void report_single_bucket_requests(vespalib::xml::XmlOutputStream& xos) const = 0;
virtual void report_delayed_single_bucket_requests(vespalib::xml::XmlOutputStream& xos) const = 0;
};
}
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