mirror of
https://github.com/ClickHouse/ClickHouse.git
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495c6e03aa
* Replace all Context references with std::weak_ptr * Fix shared context captured by value * Fix build * Fix Context with named sessions * Fix copy context * Fix gcc build * Merge with master and fix build * Fix gcc-9 build
102 lines
4.2 KiB
C++
102 lines
4.2 KiB
C++
#pragma once
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#include <Databases/DatabaseAtomic.h>
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#include <Databases/DatabaseReplicatedSettings.h>
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#include <Common/ZooKeeper/ZooKeeper.h>
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#include <Core/BackgroundSchedulePool.h>
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#include <DataStreams/BlockIO.h>
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#include <DataStreams/OneBlockInputStream.h>
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#include <Interpreters/Context.h>
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namespace DB
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{
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class DatabaseReplicatedDDLWorker;
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using ZooKeeperPtr = std::shared_ptr<zkutil::ZooKeeper>;
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class Cluster;
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using ClusterPtr = std::shared_ptr<Cluster>;
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class DatabaseReplicated : public DatabaseAtomic
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{
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public:
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DatabaseReplicated(const String & name_, const String & metadata_path_, UUID uuid,
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const String & zookeeper_path_, const String & shard_name_, const String & replica_name_,
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DatabaseReplicatedSettings db_settings_,
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ContextPtr context);
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~DatabaseReplicated() override;
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String getEngineName() const override { return "Replicated"; }
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/// If current query is initial, then the following methods add metadata updating ZooKeeper operations to current ZooKeeperMetadataTransaction.
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void dropTable(ContextPtr, const String & table_name, bool no_delay) override;
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void renameTable(ContextPtr context, const String & table_name, IDatabase & to_database,
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const String & to_table_name, bool exchange, bool dictionary) override;
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void commitCreateTable(const ASTCreateQuery & query, const StoragePtr & table,
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const String & table_metadata_tmp_path, const String & table_metadata_path,
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ContextPtr query_context) override;
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void commitAlterTable(const StorageID & table_id,
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const String & table_metadata_tmp_path, const String & table_metadata_path,
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const String & statement, ContextPtr query_context) override;
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void createDictionary(ContextPtr context,
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const String & dictionary_name,
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const ASTPtr & query) override;
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void removeDictionary(ContextPtr context, const String & dictionary_name) override;
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void detachTablePermanently(ContextPtr context, const String & table_name) override;
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void removeDetachedPermanentlyFlag(ContextPtr context, const String & table_name, const String & table_metadata_path, bool attach) const override;
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/// Try to execute DLL query on current host as initial query. If query is succeed,
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/// then it will be executed on all replicas.
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BlockIO tryEnqueueReplicatedDDL(const ASTPtr & query, ContextPtr query_context);
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void stopReplication();
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String getFullReplicaName() const;
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static std::pair<String, String> parseFullReplicaName(const String & name);
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/// Returns cluster consisting of database replicas
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ClusterPtr getCluster() const;
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void drop(ContextPtr /*context*/) override;
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void loadStoredObjects(ContextPtr context, bool has_force_restore_data_flag, bool force_attach) override;
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void shutdown() override;
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friend struct DatabaseReplicatedTask;
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friend class DatabaseReplicatedDDLWorker;
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private:
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void tryConnectToZooKeeperAndInitDatabase(bool force_attach);
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bool createDatabaseNodesInZooKeeper(const ZooKeeperPtr & current_zookeeper);
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void createReplicaNodesInZooKeeper(const ZooKeeperPtr & current_zookeeper);
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void checkQueryValid(const ASTPtr & query, ContextPtr query_context) const;
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void recoverLostReplica(const ZooKeeperPtr & current_zookeeper, UInt32 our_log_ptr, UInt32 max_log_ptr);
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std::map<String, String> tryGetConsistentMetadataSnapshot(const ZooKeeperPtr & zookeeper, UInt32 & max_log_ptr);
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ASTPtr parseQueryFromMetadataInZooKeeper(const String & node_name, const String & query);
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String readMetadataFile(const String & table_name) const;
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ClusterPtr getClusterImpl() const;
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void setCluster(ClusterPtr && new_cluster);
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void createEmptyLogEntry(Coordination::Requests & ops, const ZooKeeperPtr & current_zookeeper);
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String zookeeper_path;
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String shard_name;
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String replica_name;
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String replica_path;
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DatabaseReplicatedSettings db_settings;
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zkutil::ZooKeeperPtr getZooKeeper() const;
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std::atomic_bool is_readonly = true;
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std::unique_ptr<DatabaseReplicatedDDLWorker> ddl_worker;
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mutable ClusterPtr cluster;
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};
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}
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