George McIntyre
119 lines
5.3 KiB
C++
119 lines
5.3 KiB
C++
/*
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* Copyright - See the COPYRIGHT that is included with this distribution.
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* pvxs is distributed subject to a Software License Agreement found
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* in file LICENSE that is included with this distribution.
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*
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* Author George S. McIntyre <george@level-n.com>, 2023
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*
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*/
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#ifndef PVXS_GROUPCONFIGPROCESSOR_H
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#define PVXS_GROUPCONFIGPROCESSOR_H
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#include <string>
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#include <yajl_parse.h>
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#include "dbentry.h"
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#include "groupconfig.h"
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#include "groupdefinition.h"
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#include "iocserver.h"
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namespace pvxs {
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namespace ioc {
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// Pre-declare context class
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class GroupProcessorContext;
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/**
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* Class to parse group configuration that has been defined in db configuration files.
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* This involves extracting info fields named "Q:Group" from the database configuration
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* and converting them to Groups.
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*/
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class GroupConfigProcessor {
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GroupDefinitionMap groupDefinitionMap;
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/**
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* These are the callbacks designated by yajl for its parser functions
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* They must be defined in this order.
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* Note that we don't use number, or arrays
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*/
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yajl_callbacks yajlParserCallbacks{
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&parserCallbackNull,
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&parserCallbackBoolean,
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&parserCallbackInteger,
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&parserCallbackDouble,
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nullptr, // number
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&parserCallbackString,
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&parserCallbackStartBlock,
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&parserCallbackKey,
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&parserCallbackEndBlock,
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nullptr, // start_array,
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nullptr, // end_array,
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};
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public:
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GroupConfigMap groupConfigMap;
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// Group processing warning messages if not empty
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std::string groupProcessingWarnings;
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GroupConfigProcessor() = default;
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static void checkForTrailingCommentsAtEnd(const std::string& line);
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void defineGroups();
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void createGroups();
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static const char* infoField(DBEntry& dbEntry, const char* key, const char* defaultValue = nullptr);
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static void initialiseGroupFields(Group& group, const GroupDefinition& groupDefinition);
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static void initialiseValueTemplate(Group& group, const GroupDefinition& groupDefinition);
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void loadConfigFiles();
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void loadConfigFromDb();
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void resolveTriggerReferences();
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static void setFieldTypeDefinition(std::vector<Member>& groupMembers, const FieldName& fieldName,
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const std::vector<Member>& leafMembers, bool isLeaf = true);
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static int yajlProcess(void* parserContext, const std::function<int(GroupProcessorContext*)>& pFunction);
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private:
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static void
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addTemplatesForDefinedFields(std::vector<Member>& groupMembers, Group& group,
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const GroupDefinition& groupDefinition);
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static void addMembersForAnyType(std::vector<Member>& groupMembers, const Field& groupField);
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static void addMembersForId(std::vector<Member>& groupMembers, const Field& groupField);
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static void addMembersForMetaData(std::vector<Member>& groupMembers, const Field& groupField);
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static void addMembersForPlainType(std::vector<Member>& groupMembers, const Field& groupField,
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const dbChannel* pDbChannel);
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static void addMembersForScalarType(std::vector<Member>& groupMembers, const Field& groupField,
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const dbChannel* pDbChannel);
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static void addMembersForStructureType(std::vector<Member>& groupMembers, const Field& groupField);
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static void defineGroupTriggers(FieldDefinition& fieldDefinition, const GroupDefinition& groupDefinition,
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const TriggerNames& triggerNames, const std::string& groupName);
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static void defineFields(GroupDefinition& groupDefinition, const GroupConfig& groupConfig,
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const std::string& groupName);
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static void resolveGroupTriggerReferences(GroupDefinition& groupDefinition, const std::string& groupName);
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static void defineAtomicity(GroupDefinition& groupDefinition, const GroupConfig& groupConfig,
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const std::string& groupName);
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void defineFieldSortOrder();
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static void resolveSelfTriggerReferences(GroupDefinition& groupDefinition);
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static int parserCallbackBoolean(void* parserContext, int booleanValue);
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static int parserCallbackDouble(void* parserContext, double doubleVal);
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static int parserCallbackEndBlock(void* parserContext);
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static int parserCallbackInteger(void* parserContext, long long int integerVal);
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static int parserCallbackKey(void* parserContext, const unsigned char* key, size_t keyLength);
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static int parserCallbackNull(void* parserContext);
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static int parserCallbackStartBlock(void* parserContext);
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static int parserCallbackString(void* parserContext, const unsigned char* stringVal, size_t stringLen);
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void parseConfigString(const char* jsonGroupDefinition, const char* dbRecordName = nullptr);
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static void defineTriggers(GroupDefinition& groupDefinition, const FieldConfig& fieldConfig,
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const std::string& fieldName);
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static bool yajlParseHelper(std::istream& jsonGroupDefinitionStream, yajl_handle handle);
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static void initialiseDbLocker(Group& group);
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static void initialiseTriggers(Group& group, const GroupDefinition& groupDefinition);
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static TypeDef getTypeDefForChannel(const dbChannel* pDbChannel);
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};
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} // ioc
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} // pvxs
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#endif //PVXS_GROUPCONFIGPROCESSOR_H
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