hive metastore client has been added

ydb/core/external_sources/hive_metastore/events.cpp

@@ -0,0 +1 @@
+#include "events.h"

ydb/core/external_sources/hive_metastore/events.h

@@ -0,0 +1,86 @@
+#pragma once
+
+#include <ydb/core/external_sources/hive_metastore/hive_metastore_native/gen-cpp/ThriftHiveMetastore.h>
+#include <ydb/library/actors/core/event_local.h>
+#include <ydb/library/actors/core/events.h>
+#include <ydb/library/yql/providers/generic/connector/api/service/protos/connector.pb.h>
+#include <ydb/library/yql/public/issue/yql_issue.h>
+#include <ydb/public/api/protos/ydb_value.pb.h>
+
+#include <library/cpp/threading/future/core/future.h>
+
+namespace NKikimr::NExternalSource {
+
+struct TEvHiveMetastore {
+    // Event ids.
+    enum EEv : ui32 {
+        EvGetTable = EventSpaceBegin(NActors::TEvents::ES_PRIVATE),
+        EvGetStatistics,
+        EvGetPartitions,
+
+        EvHiveGetTableResult,
+        EvHiveGetTableStatisticsResult,
+        EvHiveGetPartitionsResult,
+        EvEnd
+    };
+
+    static_assert(EvEnd < EventSpaceEnd(NActors::TEvents::ES_PRIVATE), "expect EvEnd < EventSpaceEnd(NActors::TEvents:ES_PRIVATE)");
+
+    struct TTable {
+        std::vector<Ydb::Column> Columns;
+        TString Location;
+        TString Format;
+        TString Compression;
+        std::vector<TString> PartitionedBy;
+    };
+
+    struct TEvGetTable: NActors::TEventLocal<TEvGetTable, EvGetTable> {
+        TString DatbaseName;
+        TString TableName;
+        NThreading::TPromise<TTable> Promise;
+    };
+
+    struct TStatistics {
+        TMaybe<int64_t> Rows;
+        TMaybe<int64_t> Size;
+    };
+
+    struct TEvGetStatistics: NActors::TEventLocal<TEvGetStatistics, EvGetStatistics> {
+        TString DatbaseName;
+        TString TableName;
+        std::vector<std::string> Columns;
+        NThreading::TPromise<TStatistics> Promise;
+    };
+
+    struct TPartitions {
+        struct TPartition {
+            TString Location;
+            std::vector<TString> Values;
+        };
+        std::vector<TPartition> Partitions;
+    };
+
+    struct TEvGetPartitions: NActors::TEventLocal<TEvGetPartitions, EvGetPartitions> {
+        TString DatbaseName;
+        TString TableName;
+        NYql::NConnector::NApi::TPredicate Predicate;
+        NThreading::TPromise<TPartitions> Promise;
+    };
+
+    struct TEvHiveGetTableResult: NActors::TEventLocal<TEvHiveGetTableResult, EvHiveGetTableResult> {
+        Apache::Hadoop::Hive::Table Table;
+        NYql::TIssues Issues;
+    };
+
+    struct TEvHiveGetTableStatisticsResult: NActors::TEventLocal<TEvHiveGetTableStatisticsResult, EvHiveGetTableStatisticsResult> {
+        Apache::Hadoop::Hive::TableStatsResult Statistics;
+        NYql::TIssues Issues;
+    };
+
+    struct TEvHiveGetPartitionsResult: NActors::TEventLocal<TEvHiveGetPartitionsResult, EvHiveGetPartitionsResult> {
+        std::vector<Apache::Hadoop::Hive::Partition> Partitions;
+        NYql::TIssues Issues;
+    };
+};
+
+}

ydb/core/external_sources/hive_metastore/hive_metastore_client.cpp

@@ -0,0 +1,130 @@
+#include "hive_metastore_client.h"
+
+namespace NKikimr::NExternalSource {
+
+THiveMetastoreClient::THiveMetastoreClient(const TString& host, int32_t port) 
+    : Socket(new apache::thrift::transport::TSocket(host, port))
+    , Transport(new apache::thrift::transport::TBufferedTransport(Socket))
+    , Protocol(new apache::thrift::protocol::TBinaryProtocol(Transport))
+    , Client(new Apache::Hadoop::Hive::ThriftHiveMetastoreClient(Protocol)) {
+    Transport->open();
+    // It's very important to keep here the only 1 thread
+    ThreadPool.Start(1);
+}
+
+template<typename TResultValue>
+NThreading::TFuture<TResultValue> THiveMetastoreClient::RunOperation(const std::function<TResultValue()>& function) {
+    NThreading::TPromise<TResultValue> promise = NThreading::NewPromise<TResultValue>();
+    Y_ABORT_UNLESS(ThreadPool.Add(MakeThrFuncObj([promise, function, transport=Transport]() mutable {
+        try {
+            if constexpr (std::is_void_v<TResultValue>) {
+                function();
+                promise.SetValue();
+            } else {
+                promise.SetValue(function());  
+            }       
+        } catch (const apache::thrift::transport::TTransportException&) {
+            transport->close();
+            transport->open();
+            promise.SetException(std::current_exception());
+        } catch (...) {
+            promise.SetException(std::current_exception());
+        }
+    })));
+    return promise.GetFuture();
+}
+
+NThreading::TFuture<void> THiveMetastoreClient::CreateDatabase(const Apache::Hadoop::Hive::Database& database) {
+    return RunOperation<void>([client=Client, database]() {
+        client->create_database(database);
+    });
+}
+
+NThreading::TFuture<Apache::Hadoop::Hive::Database> THiveMetastoreClient::GetDatabase(const TString& name) {
+    return RunOperation<Apache::Hadoop::Hive::Database>([client=Client, name]()  {
+        Apache::Hadoop::Hive::Database database;
+        client->get_database(database, name);
+        return database;
+    });
+}
+
+NThreading::TFuture<void> THiveMetastoreClient::CreateTable(const Apache::Hadoop::Hive::Table& table) {
+    return RunOperation<void>([client=Client, table]() {
+        client->create_table(table);
+    });
+}
+
+NThreading::TFuture<std::vector<std::string>> THiveMetastoreClient::GetAllDatabases() {
+    return RunOperation<std::vector<std::string>>([client=Client]() {
+        std::vector<std::string> databases;
+        client->get_all_databases(databases);
+        return databases;
+    });
+}
+
+NThreading::TFuture<Apache::Hadoop::Hive::Table> THiveMetastoreClient::GetTable(const TString& databaseName, const TString& tableName) {
+    return RunOperation<Apache::Hadoop::Hive::Table>([client=Client, databaseName, tableName]()  {
+        Apache::Hadoop::Hive::Table table;
+        client->get_table(table, databaseName, tableName);
+        return table;
+    });
+}
+
+NThreading::TFuture<std::vector<std::string>> THiveMetastoreClient::GetAllTables(const TString& databaseName) {
+    return RunOperation<std::vector<std::string>>([client=Client, databaseName]()  {
+        std::vector<std::string> tables;
+        client->get_all_tables(tables, databaseName);
+        return tables;
+    });
+}
+
+NThreading::TFuture<void> THiveMetastoreClient::UpdateTableColumnStatistics(const Apache::Hadoop::Hive::ColumnStatistics& columnStatistics) {
+    return RunOperation<void>([client=Client, columnStatistics]() {
+        client->update_table_column_statistics(columnStatistics);
+    });
+}
+
+NThreading::TFuture<Apache::Hadoop::Hive::TableStatsResult> THiveMetastoreClient::GetTableStatistics(const Apache::Hadoop::Hive::TableStatsRequest& request) {
+    return RunOperation<Apache::Hadoop::Hive::TableStatsResult>([client=Client, request]()  {
+        Apache::Hadoop::Hive::TableStatsResult result;
+        client->get_table_statistics_req(result, request);
+        return result;
+    });
+}
+
+NThreading::TFuture<Apache::Hadoop::Hive::Partition> THiveMetastoreClient::AddPartition(const Apache::Hadoop::Hive::Partition& partition) {
+    return RunOperation<Apache::Hadoop::Hive::Partition>([client=Client, partition]()  {
+        Apache::Hadoop::Hive::Partition result;
+        client->add_partition(result, partition);
+        return result;
+    });
+}
+
+NThreading::TFuture<void> THiveMetastoreClient::DropPartition(const TString& databaseName, const TString& tableName, const std::vector<std::string>& partitionValues, bool deleteData) {
+    return RunOperation<void>([client=Client, databaseName, tableName, partitionValues, deleteData]() {
+        client->drop_partition(databaseName, tableName, partitionValues, deleteData);
+    });
+}
+
+NThreading::TFuture<std::vector<Apache::Hadoop::Hive::Partition>> THiveMetastoreClient::GetPartitionsByFilter(const TString& databaseName, const TString& tableName, const TString& filter, int16_t maxPartitions) {
+    return RunOperation<std::vector<Apache::Hadoop::Hive::Partition>>([client=Client, databaseName, tableName, filter, maxPartitions]()  {
+        std::vector<Apache::Hadoop::Hive::Partition> partitions;
+        client->get_partitions_by_filter(partitions, databaseName, tableName, filter, maxPartitions);
+        return partitions;
+    });
+}
+
+NThreading::TFuture<std::string> THiveMetastoreClient::GetConfigValue(const std::string& name, const std::string& defaultValue) {
+    return RunOperation<std::string>([client=Client, name, defaultValue]()  {
+        std::string result;
+        client->get_config_value(result, name, defaultValue);
+        return result;
+    });
+}
+
+THiveMetastoreClient::~THiveMetastoreClient() {
+    ThreadPool.Stop();
+    Transport->close();
+}
+
+}

ydb/core/external_sources/hive_metastore/hive_metastore_client.h

@@ -0,0 +1,49 @@
+#include <ydb/core/external_sources/hive_metastore/hive_metastore_native/gen-cpp/ThriftHiveMetastore.h>
+
+#include <contrib/restricted/thrift/thrift/protocol/TBinaryProtocol.h>
+#include <contrib/restricted/thrift/thrift/transport/TSocket.h>
+#include <contrib/restricted/thrift/thrift/transport/TTransportUtils.h>
+
+#include <library/cpp/threading/future/core/future.h>
+
+#include <util/generic/string.h>
+#include <util/thread/pool.h>
+
+namespace NKikimr::NExternalSource {
+
+struct THiveMetastoreClient : public TThrRefBase {
+public:
+    THiveMetastoreClient(const TString& host, int32_t port);
+
+    NThreading::TFuture<void> CreateDatabase(const Apache::Hadoop::Hive::Database& database);
+    NThreading::TFuture<Apache::Hadoop::Hive::Database> GetDatabase(const TString& name);
+    NThreading::TFuture<std::vector<std::string>> GetAllDatabases();
+
+    NThreading::TFuture<void> CreateTable(const Apache::Hadoop::Hive::Table& table);
+    NThreading::TFuture<Apache::Hadoop::Hive::Table> GetTable(const TString& databaseName, const TString& tableName);
+    NThreading::TFuture<std::vector<std::string>> GetAllTables(const TString& databaseName);
+
+    NThreading::TFuture<void> UpdateTableColumnStatistics(const Apache::Hadoop::Hive::ColumnStatistics& columnStatistics);
+    NThreading::TFuture<Apache::Hadoop::Hive::TableStatsResult> GetTableStatistics(const Apache::Hadoop::Hive::TableStatsRequest& request);
+
+    NThreading::TFuture<Apache::Hadoop::Hive::Partition> AddPartition(const Apache::Hadoop::Hive::Partition& partition);
+    NThreading::TFuture<void> DropPartition(const TString& databaseName, const TString& tableName, const std::vector<std::string>& partitionValues, bool deleteData = false);
+    NThreading::TFuture<std::vector<Apache::Hadoop::Hive::Partition>> GetPartitionsByFilter(const TString& databaseName, const TString& tableName, const TString& filter, int16_t maxPartitions = -1);
+
+    NThreading::TFuture<std::string> GetConfigValue(const std::string& name, const std::string& defaultValue = {});
+
+    ~THiveMetastoreClient();
+
+private:
+    template<typename TResultValue>
+    NThreading::TFuture<TResultValue> RunOperation(const std::function<TResultValue()>& function);
+
+private:
+    std::shared_ptr<apache::thrift::protocol::TTransport> Socket;
+    std::shared_ptr<apache::thrift::protocol::TTransport> Transport;
+    std::shared_ptr<apache::thrift::protocol::TProtocol> Protocol;
+    std::shared_ptr<Apache::Hadoop::Hive::ThriftHiveMetastoreClient> Client;
+    TThreadPool ThreadPool;
+};
+
+}