66 lines
2.0 KiB
C++
66 lines
2.0 KiB
C++
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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// Date: Sun Aug 9 12:26:03 CST 2015
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#ifndef BVAR_GFLAG_H
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#define BVAR_GFLAG_H
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#include <string> // std::string
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#include "bvar/variable.h"
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namespace bvar {
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// Expose important gflags as bvar so that they're monitored.
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class GFlag : public Variable {
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public:
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GFlag(const butil::StringPiece& gflag_name);
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GFlag(const butil::StringPiece& prefix,
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const butil::StringPiece& gflag_name);
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// Calling hide() in dtor manually is a MUST required by Variable.
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~GFlag() { hide(); }
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void describe(std::ostream& os, bool quote_string) const override;
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#ifdef BAIDU_INTERNAL
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void get_value(boost::any* value) const override;
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#endif
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// Get value of the gflag.
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// We don't bother making the return type generic. This function
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// is just for consistency with other classes.
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std::string get_value() const;
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// Set the gflag with a new value.
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// Returns true on success.
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bool set_value(const char* value);
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// name of the gflag.
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const std::string& gflag_name() const {
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return _gflag_name.empty() ? name() : _gflag_name;
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}
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private:
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std::string _gflag_name;
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};
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} // namespace bvar
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#endif //BVAR_GFLAG_H
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