Register RabbitMQ storage

src/Core/Settings.h

@@ -71,6 +71,7 @@ struct Settings : public SettingsCollection<Settings>
     M(SettingMilliseconds, connection_pool_max_wait_ms, 0, "The wait time when the connection pool is full.", 0) \
     M(SettingMilliseconds, replace_running_query_max_wait_ms, 5000, "The wait time for running query with the same query_id to finish when setting 'replace_running_query' is active.", 0) \
     M(SettingMilliseconds, kafka_max_wait_ms, 5000, "The wait time for reading from Kafka before retry.", 0) \
+    M(SettingMilliseconds, rabbitmq_max_wait_ms, 5000, "The wait time for reading from RabbitMQ before retry.", 0) \
     M(SettingUInt64, poll_interval, DBMS_DEFAULT_POLL_INTERVAL, "Block at the query wait loop on the server for the specified number of seconds.", 0) \
     M(SettingUInt64, idle_connection_timeout, 3600, "Close idle TCP connections after specified number of seconds.", 0) \
     M(SettingUInt64, distributed_connections_pool_size, DBMS_DEFAULT_DISTRIBUTED_CONNECTIONS_POOL_SIZE, "Maximum number of connections with one remote server in the pool.", 0) \

src/Core/config_core.h.in

@@ -5,6 +5,7 @@
 #cmakedefine01 USE_ICU
 #cmakedefine01 USE_MYSQL
 #cmakedefine01 USE_RDKAFKA
+#cmakedefine01 USE_AMQPCPP
 #cmakedefine01 USE_EMBEDDED_COMPILER
 #cmakedefine01 USE_INTERNAL_LLVM_LIBRARY
 #cmakedefine01 USE_SSL

src/Storages/RabbitMQ/RabbitMQSettings.cpp

@@ -0,0 +1,44 @@
+#include <Storages/RabbitMQ/RabbitMQSettings.h>
+#include <Parsers/ASTCreateQuery.h>
+#include <Parsers/ASTSetQuery.h>
+#include <Parsers/ASTFunction.h>
+#include <Common/Exception.h>
+#include <Core/SettingsCollectionImpl.h>
+
+
+namespace DB
+{
+
+namespace ErrorCodes
+{
+    extern const int BAD_ARGUMENTS;
+    extern const int UNKNOWN_SETTING;
+}
+
+IMPLEMENT_SETTINGS_COLLECTION(RabbitMQSettings, LIST_OF_RABBITMQ_SETTINGS)
+
+void RabbitMQSettings::loadFromQuery(ASTStorage & storage_def)
+{
+    if (storage_def.settings)
+    {
+        try
+        {
+            applyChanges(storage_def.settings->changes);
+        }
+        catch (Exception & e)
+        {
+            if (e.code() == ErrorCodes::UNKNOWN_SETTING)
+                throw Exception(e.message() + " for storage " + storage_def.engine->name, ErrorCodes::BAD_ARGUMENTS);
+            else
+                e.rethrow();
+        }
+    }
+    else
+    {
+        auto settings_ast = std::make_shared<ASTSetQuery>();
+        settings_ast->is_standalone = false;
+        storage_def.set(storage_def.settings, settings_ast);
+    }
+}
+}
+

src/Storages/RabbitMQ/RabbitMQSettings.h

@@ -0,0 +1,26 @@
+#pragma once
+#include <Core/SettingsCollection.h>
+
+namespace DB
+{
+    class ASTStorage;
+
+    struct RabbitMQSettings : public SettingsCollection<RabbitMQSettings>
+    {
+
+#define LIST_OF_RABBITMQ_SETTINGS(M)                                      \
+    M(SettingString, rabbitmq_host_port, "", "A host-port to connect to RabbitMQ server.", 0) \
+    M(SettingString, rabbitmq_routing_key, "5672", "A routing key to connect producer->exchange->queue<->consumer.", 0) \
+    M(SettingString, rabbitmq_exchange_name, "clickhouse-exchange", "The exhange name, to which messages are sent. Needed to bind queues to it.", 0) \
+    M(SettingString, rabbitmq_format, "", "The message format.", 0) \
+    M(SettingChar, rabbitmq_row_delimiter, '\0', "The character to be considered as a delimiter.", 0) \
+    M(SettingUInt64, rabbitmq_bind_by_id, 0, "A flag which indicates that binding should be done in range [0, num_consumers).", 0) \
+    M(SettingUInt64, rabbitmq_num_consumers, 1, "The number of consumer channels per table.", 0) \
+    M(SettingUInt64, rabbitmq_num_queues, 1, "The number of queues per consumer.", 0) \
+    M(SettingUInt64, rabbitmq_hash_exchange, 0, "A flag which indicates whether consistent-hash-exchange should be used.", 0) \
+
+    DECLARE_SETTINGS_COLLECTION(LIST_OF_RABBITMQ_SETTINGS)
+
+    void loadFromQuery(ASTStorage & storage_def);
+    };
+}

src/Storages/RabbitMQ/StorageRabbitMQ.cpp

@@ -0,0 +1,249 @@
+#include <DataStreams/IBlockInputStream.h>
+#include <DataStreams/LimitBlockInputStream.h>
+#include <DataStreams/UnionBlockInputStream.h>
+#include <DataStreams/copyData.h>
+#include <DataTypes/DataTypeDateTime.h>
+#include <DataTypes/DataTypeNullable.h>
+#include <DataTypes/DataTypesNumber.h>
+#include <DataTypes/DataTypeString.h>
+#include <Interpreters/InterpreterInsertQuery.h>
+#include <Interpreters/evaluateConstantExpression.h>
+#include <Parsers/ASTCreateQuery.h>
+#include <Parsers/ASTExpressionList.h>
+#include <Parsers/ASTInsertQuery.h>
+#include <Parsers/ASTLiteral.h>
+#include <Storages/StorageFactory.h>
+#include <Storages/StorageMaterializedView.h>
+#include <boost/algorithm/string/replace.hpp>
+#include <boost/algorithm/string/split.hpp>
+#include <boost/algorithm/string/trim.hpp>
+#include <Common/Exception.h>
+#include <Common/Macros.h>
+#include <Common/config_version.h>
+#include <Common/setThreadName.h>
+#include <Common/typeid_cast.h>
+#include <common/logger_useful.h>
+#include <Common/quoteString.h>
+#include <Common/parseAddress.h>
+#include <Processors/Sources/SourceFromInputStream.h>
+
+#include <Storages/RabbitMQ/StorageRabbitMQ.h>
+#include <Storages/RabbitMQ/RabbitMQSettings.h>
+#include <amqpcpp.h>
+
+namespace DB
+{
+
+namespace ErrorCodes
+{
+    extern const int NOT_IMPLEMENTED;
+    extern const int LOGICAL_ERROR;
+    extern const int BAD_ARGUMENTS;
+    extern const int NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
+}
+
+StorageRabbitMQ::StorageRabbitMQ(
+        const StorageID & table_id_,
+        Context & context_,
+        const ColumnsDescription & columns_,
+        const String & host_port_,
+        const String & routing_key_,
+        const String & exchange_name_,
+        const String & format_name_,
+        char row_delimiter_,
+        size_t num_consumers_,
+        bool bind_by_id_,
+        size_t num_queues_,
+        bool hash_exchange_)
+        : IStorage(table_id_)
+        , global_context(context_.getGlobalContext())
+        , rabbitmq_context(Context(global_context))
+        , routing_key(global_context.getMacros()->expand(routing_key_))
+        , exchange_name(exchange_name_)
+        , format_name(global_context.getMacros()->expand(format_name_))
+        , row_delimiter(row_delimiter_)
+        , num_consumers(num_consumers_)
+        , bind_by_id(bind_by_id_)
+        , num_queues(num_queues_)
+        , hash_exchange(hash_exchange_)
+        , log(&Logger::get("StorageRabbitMQ (" + table_id_.table_name + ")"))
+        , semaphore(0, num_consumers_)
+        , parsed_address(parseAddress(global_context.getMacros()->expand(host_port_), 5672))
+{
+}
+
+
+void registerStorageRabbitMQ(StorageFactory & factory)
+{
+    auto creator_fn = [](const StorageFactory::Arguments & args)
+    {
+        ASTs & engine_args = args.engine_args;
+        size_t args_count = engine_args.size();
+        bool has_settings = args.storage_def->settings;
+
+        RabbitMQSettings rabbitmq_settings;
+        if (has_settings)
+        {
+            rabbitmq_settings.loadFromQuery(*args.storage_def);
+        }
+
+        String host_port = rabbitmq_settings.rabbitmq_host_port;
+        if (args_count >= 1)
+        {
+            const auto * ast = engine_args[0]->as<ASTLiteral>();
+            if (ast && ast->value.getType() == Field::Types::String)
+            {
+                host_port = safeGet<String>(ast->value);
+            }
+            else
+            {
+                throw Exception(String("RabbitMQ host:port must be a string"), ErrorCodes::BAD_ARGUMENTS);
+            }
+        }
+
+        String routing_key = rabbitmq_settings.rabbitmq_routing_key.value;
+        if (args_count >= 2)
+        {
+            const auto * ast = engine_args[1]->as<ASTLiteral>();
+            if (ast && ast->value.getType() == Field::Types::String)
+            {
+                routing_key = safeGet<String>(ast->value);
+            }
+            else
+            {
+                throw Exception(String("RabbitMQ routing key must be a string"), ErrorCodes::BAD_ARGUMENTS);
+            }
+        }
+
+        String exchange = rabbitmq_settings.rabbitmq_exchange_name.value;
+        if (args_count >= 3)
+        {
+            engine_args[2] = evaluateConstantExpressionOrIdentifierAsLiteral(engine_args[2], args.local_context);
+
+            const auto * ast = engine_args[2]->as<ASTLiteral>();
+            if (ast && ast->value.getType() == Field::Types::String)
+            {
+                exchange = safeGet<String>(ast->value);
+            }
+        }
+
+        String format = rabbitmq_settings.rabbitmq_format.value;
+        if (args_count >= 4)
+        {
+            engine_args[3] = evaluateConstantExpressionOrIdentifierAsLiteral(engine_args[3], args.local_context);
+
+            const auto * ast = engine_args[3]->as<ASTLiteral>();
+            if (ast && ast->value.getType() == Field::Types::String)
+            {
+                format = safeGet<String>(ast->value);
+            }
+            else
+            {
+                throw Exception("Format must be a string", ErrorCodes::BAD_ARGUMENTS);
+            }
+        }
+
+        char row_delimiter = rabbitmq_settings.rabbitmq_row_delimiter;
+        if (args_count >= 5)
+        {
+            engine_args[4] = evaluateConstantExpressionOrIdentifierAsLiteral(engine_args[4], args.local_context);
+
+            const auto * ast = engine_args[4]->as<ASTLiteral>();
+            String arg;
+            if (ast && ast->value.getType() == Field::Types::String)
+            {
+                arg = safeGet<String>(ast->value);
+            }
+            else
+            {
+                throw Exception("Row delimiter must be a char", ErrorCodes::BAD_ARGUMENTS);
+            }
+            if (arg.size() > 1)
+            {
+                throw Exception("Row delimiter must be a char", ErrorCodes::BAD_ARGUMENTS);
+            }
+            else if (arg.empty())
+            {
+                row_delimiter = '\0';
+            }
+            else
+            {
+                row_delimiter = arg[0];
+            }
+        }
+
+        size_t bind_by_id = static_cast<bool>(rabbitmq_settings.rabbitmq_bind_by_id);
+        if (args_count >= 6)
+        {
+            const auto * ast = engine_args[5]->as<ASTLiteral>();
+            if (ast && ast->value.getType() == Field::Types::UInt64)
+            {
+                bind_by_id = static_cast<bool>(safeGet<UInt64>(ast->value));
+            }
+            else
+            {
+                throw Exception("Hash exchange flag must be a boolean", ErrorCodes::BAD_ARGUMENTS);
+            }
+        }
+
+        UInt64 num_consumers = rabbitmq_settings.rabbitmq_num_consumers;
+        if (args_count >= 7)
+        {
+            const auto * ast = engine_args[6]->as<ASTLiteral>();
+            if (ast && ast->value.getType() == Field::Types::UInt64)
+            {
+                num_consumers = safeGet<UInt64>(ast->value);
+            }
+            else
+            {
+                throw Exception("Number of consumers must be a positive integer", ErrorCodes::BAD_ARGUMENTS);
+            }
+        }
+
+        UInt64 num_queues = rabbitmq_settings.rabbitmq_num_queues;
+        if (args_count >= 8)
+        {
+            const auto * ast = engine_args[7]->as<ASTLiteral>();
+            if (ast && ast->value.getType() == Field::Types::UInt64)
+            {
+                num_consumers = safeGet<UInt64>(ast->value);
+            }
+            else
+            {
+                throw Exception("Number of queues must be a positive integer", ErrorCodes::BAD_ARGUMENTS);
+            }
+        }
+
+        size_t hash_exchange = static_cast<bool>(rabbitmq_settings.rabbitmq_hash_exchange);
+        if (args_count >= 9)
+        {
+            const auto * ast = engine_args[8]->as<ASTLiteral>();
+            if (ast && ast->value.getType() == Field::Types::UInt64)
+            {
+                hash_exchange = static_cast<bool>(safeGet<UInt64>(ast->value));
+            }
+            else
+            {
+                throw Exception("Hash exchange flag must be a boolean", ErrorCodes::BAD_ARGUMENTS);
+            }
+        }
+
+        return StorageRabbitMQ::create(args.table_id, args.context, args.columns, host_port, routing_key, exchange, 
+                format, row_delimiter, num_consumers, bind_by_id, num_queues, hash_exchange);
+    };
+
+    factory.registerStorage("RabbitMQ", creator_fn, StorageFactory::StorageFeatures{ .supports_settings = true, });
+
+}
+
+
+NamesAndTypesList StorageRabbitMQ::getVirtuals() const
+{
+    return NamesAndTypesList{
+            {"_exchange", std::make_shared<DataTypeString>()},
+            {"_routingKey", std::make_shared<DataTypeString>()}
+    };
+}
+
+}
+

src/Storages/RabbitMQ/StorageRabbitMQ.h

@@ -0,0 +1,62 @@
+#pragma once
+#include <Core/BackgroundSchedulePool.h>
+#include <Storages/IStorage.h>
+#include <Interpreters/Context.h>
+#include <Poco/Semaphore.h>
+#include <ext/shared_ptr_helper.h>
+#include <mutex>
+#include <atomic>
+#include <event2/event.h>
+
+namespace DB
+{
+
+using ChannelPtr = std::shared_ptr<AMQP::TcpChannel>;
+
+class StorageRabbitMQ final: public ext::shared_ptr_helper<StorageRabbitMQ>, public IStorage
+{
+    friend struct ext::shared_ptr_helper<StorageRabbitMQ>;
+
+public:
+    std::string getName() const override { return "RabbitMQ"; }
+    bool supportsSettings() const override { return true; }
+
+protected:
+    StorageRabbitMQ(
+            const StorageID & table_id_,
+            Context & context_,
+            const ColumnsDescription & columns_,
+            const String & host_port_,
+            const String & routing_key_, const String & exchange_name_, 
+            const String & format_name_, char row_delimiter_,
+            size_t num_consumers_, bool bind_by_id_, size_t num_queues_, bool hash_exchange);
+
+private:
+    Context global_context;
+    Context rabbitmq_context;
+
+    String routing_key;
+    const String exchange_name;
+
+    const String format_name;
+    char row_delimiter;
+    size_t num_consumers;
+    size_t num_created_consumers = 0;
+
+    bool bind_by_id;
+    size_t num_queues;
+    const bool hash_exchange;
+
+    Poco::Logger * log;
+    std::pair<std::string, UInt16> parsed_address;
+
+    Poco::Semaphore semaphore;
+    std::mutex mutex;
+
+    size_t consumer_id = 0;
+
+    BackgroundSchedulePool::TaskHolder task;
+    std::atomic<bool> stream_cancelled{false};
+};
+
+}

src/Storages/registerStorages.cpp

@@ -46,6 +46,10 @@ void registerStorages()
     #if USE_RDKAFKA
     registerStorageKafka(factory);
     #endif
+
+    #if USE_AMQPCPP
+    registerStorageRabbitMQ(factory);
+    #endif
 }
 
 }

src/Storages/registerStorages.h

@@ -47,6 +47,10 @@ void registerStorageMySQL(StorageFactory & factory);
 void registerStorageKafka(StorageFactory & factory);
 #endif
 
+#if USE_AMQPCPP
+void registerStorageRabbitMQ(StorageFactory & factory);
+#endif
+
 void registerStorages();
 
 }