// Licensed to the Apache Software Foundation (ASF) under one

// or more contributor license agreements.  See the NOTICE file

// distributed with this work for additional information

// regarding copyright ownership.  The ASF licenses this file

// to you under the Apache License, Version 2.0 (the

// "License"); you may not use this file except in compliance

// with the License.  You may obtain a copy of the License at

//

//   http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing,

// software distributed under the License is distributed on an

// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

// KIND, either express or implied.  See the License for the

// specific language governing permissions and limitations

// under the License.

#pragma once

#include <vector>

#include "common/status.h"

#include "information_schema/schema_scanner.h"

namespace doris {

class RuntimeState;

class Block;

// information_schema.extensions: kernel extension inventory of the currently

// connected FE (extensions are per-FE local state, so the RPC targets the

// connected FE instead of the master).

class SchemaExtensionsScanner : public SchemaScanner {

    ENABLE_FACTORY_CREATOR(SchemaExtensionsScanner);

public:

    SchemaExtensionsScanner();

    ~SchemaExtensionsScanner() override = default;

    Status start(RuntimeState* state) override;

    Status get_next_block_internal(Block* block, bool* eos) override;

    static std::vector<SchemaScanner::ColumnDesc> _s_tbls_columns;

private:

    Status _get_extensions_block_from_fe();

    TNetworkAddress _fe_addr;

    int _block_rows_limit = 4096;

    int _row_idx = 0;

    int _total_rows = 0;

    int _rpc_timeout_ms = 3000;

    std::unique_ptr<Block> _extensions_block = nullptr;

};

} // namespace doris