| /******************************************************************** |
| * 2014 - |
| * open source under Apache License Version 2.0 |
| ********************************************************************/ |
| /** |
| * 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. |
| */ |
| #ifndef _HDFS_LIBHDFS3_COMMON_XMLCONFIG_H_ |
| #define _HDFS_LIBHDFS3_COMMON_XMLCONFIG_H_ |
| |
| #include <stdint.h> |
| #include <string> |
| #include <sstream> |
| #include <map> |
| |
| namespace Hdfs { |
| |
| /** |
| * A configure file parser. |
| */ |
| class Config { |
| public: |
| /** |
| * Construct a empty Config instance. |
| */ |
| Config() { |
| } |
| |
| /** |
| * Construct a Config with given configure file. |
| * @param path The path of configure file. |
| * @throw HdfsBadConfigFoumat |
| */ |
| Config(const char * path); |
| |
| /** |
| * Parse the configure file. |
| * @throw HdfsBadConfigFoumat |
| */ |
| void update(const char * path); |
| |
| /** |
| * Get a string with given configure key. |
| * @param key The key of the configure item. |
| * @return The value of configure item. |
| * @throw HdfsConfigNotFound |
| */ |
| const char * getString(const char * key) const; |
| |
| /** |
| * Get a string with given configure key. |
| * Return the default value def if key is not found. |
| * @param key The key of the configure item. |
| * @param def The defalut value. |
| * @return The value of configure item. |
| */ |
| const char * getString(const char * key, const char * def) const; |
| |
| /** |
| * Get a string with given configure key. |
| * @param key The key of the configure item. |
| * @return The value of configure item. |
| * @throw HdfsConfigNotFound |
| */ |
| const char * getString(const std::string & key) const; |
| |
| /** |
| * Get a string with given configure key. |
| * Return the default value def if key is not found. |
| * @param key The key of the configure item. |
| * @param def The defalut value. |
| * @return The value of configure item. |
| */ |
| const char * getString(const std::string & key, |
| const std::string & def) const; |
| |
| /** |
| * Get a 64 bit integer with given configure key. |
| * @param key The key of the configure item. |
| * @return The value of configure item. |
| * @throw HdfsConfigNotFound |
| */ |
| int64_t getInt64(const char * key) const; |
| |
| /** |
| * Get a 64 bit integer with given configure key. |
| * Return the default value def if key is not found. |
| * @param key The key of the configure item. |
| * @param def The defalut value. |
| * @return The value of configure item. |
| */ |
| int64_t getInt64(const char * key, int64_t def) const; |
| |
| /** |
| * Get a 32 bit integer with given configure key. |
| * @param key The key of the configure item. |
| * @return The value of configure item. |
| * @throw HdfsConfigNotFound |
| */ |
| int32_t getInt32(const char * key) const; |
| |
| /** |
| * Get a 32 bit integer with given configure key. |
| * Return the default value def if key is not found. |
| * @param key The key of the configure item. |
| * @param def The defalut value. |
| * @return The value of configure item. |
| */ |
| int32_t getInt32(const char * key, int32_t def) const; |
| |
| /** |
| * Get a double with given configure key. |
| * @param key The key of the configure item. |
| * @return The value of configure item. |
| * @throw HdfsConfigNotFound |
| */ |
| double getDouble(const char * key) const; |
| |
| /** |
| * Get a double with given configure key. |
| * Return the default value def if key is not found. |
| * @param key The key of the configure item. |
| * @param def The defalut value. |
| * @return The value of configure item. |
| */ |
| double getDouble(const char * key, double def) const; |
| |
| /** |
| * Get a boolean with given configure key. |
| * @param key The key of the configure item. |
| * @return The value of configure item. |
| * @throw HdfsConfigNotFound |
| */ |
| bool getBool(const char * key) const; |
| |
| /** |
| * Get a boolean with given configure key. |
| * Return the default value def if key is not found. |
| * @param key The key of the configure item. |
| * @param def The default value. |
| * @return The value of configure item. |
| */ |
| bool getBool(const char * key, bool def) const; |
| |
| /** |
| * Set a configure item |
| * @param key The key will set. |
| * @param value The value will be set to. |
| */ |
| template<typename T> |
| void set(const char * key, T const & value) { |
| std::stringstream ss; |
| ss.imbue(std::locale::classic()); |
| ss << value; |
| kv[key] = ss.str(); |
| } |
| |
| /** |
| * Get the hash value of this object |
| * |
| * @return The hash value |
| */ |
| size_t hash_value() const; |
| |
| private: |
| std::string path; |
| std::map<std::string, std::string> kv; |
| }; |
| |
| } |
| |
| #endif /* _HDFS_LIBHDFS3_COMMON_XMLCONFIG_H_ */ |