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49 lines
1.7 KiB
C++
49 lines
1.7 KiB
C++
#pragma once
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#include <Poco/AutoPtr.h>
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#include <Poco/Util/AbstractConfiguration.h>
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#include <Poco/Timestamp.h>
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#include <atomic>
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#include <memory>
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#include <string>
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#include <set>
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namespace DB
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{
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using LoadablesConfigurationPtr = Poco::AutoPtr<Poco::Util::AbstractConfiguration>;
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/// Base interface for configurations source for Loadble objects, which can be
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/// loaded with ExternalLoader. Configurations may came from filesystem (XML-files),
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/// server memory (from database), etc. It's important that main result of this class
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/// (LoadablesConfigurationPtr) may contain more than one loadable config,
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/// each one with own key, which can be obtained with keys method,
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/// for example multiple dictionaries can be defined in single .xml file.
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class IExternalLoaderConfigRepository
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{
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public:
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/// Returns the name of the repository.
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virtual std::string getName() const = 0;
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/// Whether this repository is temporary:
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/// it's created and destroyed while executing the same query.
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virtual bool isTemporary() const { return false; }
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/// Return all available sources of loadables structure
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/// (all .xml files from fs, all entities from database, etc)
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virtual std::set<std::string> getAllLoadablesDefinitionNames() = 0;
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/// Checks that source of loadables configuration exist.
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virtual bool exists(const std::string & path) = 0;
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/// Returns entity last update time
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virtual Poco::Timestamp getUpdateTime(const std::string & path) = 0;
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/// Load configuration from some concrete source to AbstractConfiguration
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virtual LoadablesConfigurationPtr load(const std::string & path) = 0;
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virtual ~IExternalLoaderConfigRepository() = default;
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};
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}
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