IOVDbNamespace::CrestFunctions Class Reference

#include <CrestFunctions.h>

Collaboration diagram for IOVDbNamespace::CrestFunctions:

Public Member Functions
	CrestFunctions (const std::string &crest_path)
const std::string &	getURLBase ()
void	setURLBase (const std::string &crest_path)
std::string	extractHashFromJson (const std::string &jsonReply)
std::vector< IovHashPair >	getIovsForTag (const std::string &tag, uint64_t since, uint64_t until)
std::string	getLastHashForTag (const std::string &tag)
std::string	getPayloadForHash (const std::string &hash)
std::string	folderDescriptionForTag (const std::string &tag)
std::string	extractDescriptionFromJson (const std::string &jsonReply)
nlohmann::json	getTagInfo (const std::string &tag)
nlohmann::json	getTagProperties (const std::string &tag)
std::string	getTagInfoElement (nlohmann::json tag_info, const std::string &key)
std::pair< std::vector< cool::ChannelId >, std::vector< std::string > >	extractChannelListFromString (const std::string &chanString)
std::vector< uint64_t >	getIovGroups (const std::string &tag)
std::pair< uint64_t, uint64_t >	getSinceUntilPair (const std::vector< uint64_t > &v, const uint64_t since, const uint64_t until)
int	getTagSize (const std::string &tagname)
std::pair< uint64_t, uint64_t >	getIovInterval (const std::string &tag, const uint64_t since, const uint64_t until)

Private Member Functions
nlohmann::json	getResources (nlohmann::json &js)

Private Attributes
std::unique_ptr< Crest::CrestApiBase >	m_crestCl
std::string	m_CREST_PATH = ""

Detailed Description

Definition at line 30 of file CrestFunctions.h.

Constructor & Destructor Documentation

CrestFunctions()

IOVDbNamespace::CrestFunctions::CrestFunctions

(

const std::string &

crest_path

)

Definition at line 24 of file CrestFunctions.cxx.

                                                            {
    setURLBase(crest_path);
 
    const std::string prefix1 = "http://";
    const std::string prefix2 = "https://";
    if (crest_path.starts_with(prefix1) || crest_path.starts_with(prefix2)){
      m_crestCl = std::unique_ptr<Crest::CrestApi>(new Crest::CrestApi(getURLBase()));
    }
    else{
      m_crestCl = std::unique_ptr<Crest::CrestApiFs>(new Crest::CrestApiFs(true,getURLBase()));
    }
  }

Member Function Documentation

extractChannelListFromString()

std::pair< std::vector< cool::ChannelId >, std::vector< std::string > > IOVDbNamespace::CrestFunctions::extractChannelListFromString

(

const std::string &

chanString

)

Definition at line 174 of file CrestFunctions.cxx.

                                                                          {
    std::vector<cool::ChannelId> list;
    std::vector<std::string> names;
    nlohmann::json js = nlohmann::json::parse(chanString);
    int n = js.size();
 
    for (int i = 0; i <= n; i++) {
      nlohmann::json j_object = js[i];
      for (auto& [key, val] : j_object.items()){
        list.push_back(std::stoll(key));
        names.push_back(val);
      }
    }
 
    // if all the names are empty, these are unnamed channels, and can just return an empty vector for the names
    auto isEmpty=[](const std::string & s){return s.empty();};
    if ( std::all_of(names.begin(), names.end(), isEmpty)) names.clear();
    return std::make_pair(std::move(list), std::move(names));
  }

extractDescriptionFromJson()

std::string IOVDbNamespace::CrestFunctions::extractDescriptionFromJson

(

const std::string &

jsonReply

)

Definition at line 103 of file CrestFunctions.cxx.

                                                                       {
    std::string description{};
    try{
      const std::string_view signature="node_description\\\":\\\"";
      const auto signaturePosition = jsonReply.find(signature);
      if (signaturePosition == std::string::npos) throw std::runtime_error("signature "+std::string(signature)+" not found");
      const auto startOfDescription= signaturePosition + signature.size();
      const std::string_view endSignature = "\\\",\\\"payload_spec";
      const auto endOfDescription=jsonReply.find(endSignature);
      if (endOfDescription == std::string::npos) throw std::runtime_error("end signature "+std::string(endSignature)+" not found");
      const auto len=endOfDescription-startOfDescription;
      description=jsonReply.substr(startOfDescription, len);
    } catch (std::exception & e){
      std::cerr<<__FILE__<<":"<<__LINE__<< ": "<<e.what()<<" while trying to find the description in "<<jsonReply<<std::endl;
    }
    
    return unescapeQuotes(unescapeBackslash(description));
  }  

extractHashFromJson()

std::string IOVDbNamespace::CrestFunctions::extractHashFromJson

(

const std::string &

jsonReply

)

Definition at line 49 of file CrestFunctions.cxx.

                                                                {
    std::string hash{};
    try{
      std::string_view signature="payloadHash\":\"";
      auto signaturePosition=jsonReply.rfind(signature);
      if (signaturePosition == std::string::npos) throw std::runtime_error("signature "+std::string(signature)+" not found");
      auto startOfHash=signaturePosition + signature.size();
      auto endOfHash=jsonReply.find('\"',startOfHash);
      auto len=endOfHash-startOfHash;
      if (startOfHash > jsonReply.size()) throw std::runtime_error("Hash start is beyond end of string");
      hash=jsonReply.substr(startOfHash, len);
    } catch (std::exception & e){
      std::cerr<<__FILE__<<":"<<__LINE__<< ": "<<e.what()<<" while trying to find the hash in "<<jsonReply<<std::endl;
    }
    return hash;
  }

folderDescriptionForTag()

std::string IOVDbNamespace::CrestFunctions::folderDescriptionForTag

(

const std::string &

tag

)

Definition at line 124 of file CrestFunctions.cxx.

                                                              {
 
    std::string jsonReply = "";
 
    TagMetaDto dto = m_crestCl->findTagMeta(tag);
    TagInfoDto tag_info_dto = dto.getTagInfoDto();
    jsonReply = tag_info_dto.getFolderDescription();
    return jsonReply;
  }

getIovGroups()

std::vector< uint64_t > IOVDbNamespace::CrestFunctions::getIovGroups

(

const std::string &

tag

)

Definition at line 202 of file CrestFunctions.cxx.

                                                   {
    std::vector<uint64_t> v;
    try{
      IovSetDto dto = m_crestCl->selectGroups(tag, 0, 10000, 0, "id.since:ASC");
      const std::vector<IovDto> & res = dto.getResources();
      for (const IovDto & item_iov: res){
        v.emplace_back(item_iov.getSince());
      }
    } catch (std::exception & e){
      std::cerr<<__FILE__<<":"<<__LINE__<< ": "<<e.what()<<" while trying to find the IOVs"<<std::endl;
      return {};
    }
    return v;
  }

getIovInterval()

std::pair< uint64_t, uint64_t > IOVDbNamespace::CrestFunctions::getIovInterval	(	const std::string &	tag,
		const uint64_t	since,
		const uint64_t	until
	)

Definition at line 260 of file CrestFunctions.cxx.

                                                                                                 {
    std::vector<uint64_t> v = getIovGroups(tag);
    v.push_back(std::numeric_limits<uint64_t>::max()); // added "infinity" as the last item
    return getSinceUntilPair(std::move(v), since, until);
  }

getIovsForTag()

std::vector< IovHashPair > IOVDbNamespace::CrestFunctions::getIovsForTag	(	const std::string &	tag,
		uint64_t	since,
		uint64_t	until
	)

Definition at line 268 of file CrestFunctions.cxx.

                                                                                    {
    std::vector<IovHashPair> iovHashPairs;
    int iovNumber = getTagSize(tag);
    try{
      IovSetDto dto;
      if (iovNumber <=1000) {
        dto = m_crestCl->selectIovs(tag, 0, -1, 0, 10000, 0, "id.since:ASC");
      } else {
        const auto &[s_time, u_time] = getIovInterval(tag, since, until);
        if (s_time == 0 && u_time == 0){ // data out of range
            return iovHashPairs;
          } else {
          dto = m_crestCl->selectIovs(tag, s_time, u_time, 0, 10000, 0, "id.since:ASC");
          }
      }
      std::vector<IovDto> res = dto.getResources();
      std::map<uint64_t, std::string> hashmap;
      for (const IovDto & item: res) {
    hashmap[item.getSince()] = item.getPayloadHash();
      } 
      for (auto& t : hashmap){
        iovHashPairs.emplace_back(std::to_string(t.first),t.second);
      }
    } catch (std::exception & e){
      std::cerr<<__FILE__<<":"<<__LINE__<< ": "<<e.what()<<" while trying to find the IOVs"<<std::endl;
      return {};
    }
    return iovHashPairs;
  }

getLastHashForTag()

std::string IOVDbNamespace::CrestFunctions::getLastHashForTag

(

const std::string &

tag

)

Definition at line 68 of file CrestFunctions.cxx.

                                                        {
    char tu[] = "";
    strfry(tu);
    std::string reply = "";
 
    try{
      IovSetDto dto = m_crestCl->selectIovs(tag, 0, -1, 0, 10000, 0, "id.since:ASC");
 
      nlohmann::json iov_data = dto.toJson();
      nlohmann::json iov_list = getResources(iov_data);
      reply = iov_list.dump();
    } catch (std::exception & e){
      std::cerr<<__FILE__<<":"<<__LINE__<< ": "<<e.what()<<" while trying to find the IOVs"<<std::endl;
      return "";
    }
 
    return extractHashFromJson(reply);
  }

getPayloadForHash()

std::string IOVDbNamespace::CrestFunctions::getPayloadForHash

(

const std::string &

hash

)

Definition at line 88 of file CrestFunctions.cxx.

                                                         {
    std::string reply = "";  
    
    try{
    reply = m_crestCl->getPayload(hash);
    } catch (std::exception & e){
        std::cerr<<__FILE__<<":"<<__LINE__<< ": "<<e.what()<<" while trying to find the payload"<<std::endl;
        return "";
    }
    
    return reply;
  }

getResources()

nlohmann::json IOVDbNamespace::CrestFunctions::getResources ( nlohmann::json &  js )

private

Definition at line 195 of file CrestFunctions.cxx.

                                               {
    nlohmann::json js2 = json::array();
    nlohmann::json result = js.value("resources", js2);
    return result;
  }

getSinceUntilPair()

std::pair< uint64_t, uint64_t > IOVDbNamespace::CrestFunctions::getSinceUntilPair	(	const std::vector< uint64_t > &	v,
		const uint64_t	since,
		const uint64_t	until
	)

Definition at line 219 of file CrestFunctions.cxx.

                                                                                                           {
    uint64_t new_since = 0;
    uint64_t new_until = 0;
    std::pair<uint64_t,uint64_t> answer = std::make_pair(0,0);
 
    if (until < since){
    std::cerr << "Wrong since/until." << std::endl;
    return answer;
    }
 
    int N = v.size();
    for (int i = 0; i < N; i++) {
      if(v[i] <= since && since < v[i+1]){
    new_since = v[i];
    break;
      }
    }
 
    for (int i = 0; i < N; i++) {
      if(v[i] < until && until <= v[i+1]){
    new_until = v[i+1];
    break;
      }
    }    
 
    answer = std::make_pair(new_since,new_until);
    return answer; 
  }

getTagInfo()

nlohmann::json IOVDbNamespace::CrestFunctions::getTagInfo

(

const std::string &

tag

)

Definition at line 134 of file CrestFunctions.cxx.

                                                              {
    try{
      TagMetaDto dto = m_crestCl->findTagMeta(tag);
      TagInfoDto tag_info_dto = dto.getTagInfoDto();
      nlohmann::json tag_info = tag_info_dto.toJson();
      return tag_info;
    } catch (std::exception & e){
      std::cerr<<__FILE__<<":"<<__LINE__<< ": " << e.what() << " Cannot get a tag meta info " << tag << std::endl;
    }
    return nullptr;
  }

getTagInfoElement()

std::string IOVDbNamespace::CrestFunctions::getTagInfoElement	(	nlohmann::json	tag_info,
		const std::string &	key
	)

Definition at line 158 of file CrestFunctions.cxx.

                                                                               {
    if (tag_info.contains(key)){
      if (key == "channel_list"){ 
        return  tag_info[key].dump();
      } else if (key== "node_description"){
        std::string v;
        tag_info[key].get_to(v);
        return v;
      } else{
        return nlohmann::to_string(tag_info[key]);
      }
    }
    return "";
  }

getTagProperties()

nlohmann::json IOVDbNamespace::CrestFunctions::getTagProperties

(

const std::string &

tag

)

Definition at line 147 of file CrestFunctions.cxx.

                                                       {
    try{
      TagDto dto = m_crestCl->findTag(tag);
      return dto.toJson();
    } catch (std::exception & e){
      std::cerr<<__FILE__<<":"<<__LINE__<< ": " << e.what() << " Cannot get a tag Properties of " << tag << std::endl;
    }
    return nullptr;
  }

getTagSize()

int IOVDbNamespace::CrestFunctions::getTagSize

(

const std::string &

tagname

)

Definition at line 249 of file CrestFunctions.cxx.

                                                        {
    int res = 0; 
    try{
      res = m_crestCl->getSize(tagname);
    } catch (std::exception & e){
      std::cerr<<__FILE__<<":"<<__LINE__<< ": " << e.what() << " Cannot get the tag size for " << tagname << std::endl;
    }
    return res;
  }

getURLBase()

const std::string & IOVDbNamespace::CrestFunctions::getURLBase

(

)

Definition at line 38 of file CrestFunctions.cxx.

                            {
    return m_CREST_PATH;
  }

setURLBase()

void IOVDbNamespace::CrestFunctions::setURLBase

(

const std::string &

crest_path

)

Definition at line 43 of file CrestFunctions.cxx.

                                                        {
    m_CREST_PATH = crest_path;
  }

Member Data Documentation

m_CREST_PATH

std::string IOVDbNamespace::CrestFunctions::m_CREST_PATH = ""

private

Definition at line 85 of file CrestFunctions.h.

m_crestCl

std::unique_ptr<Crest::CrestApiBase> IOVDbNamespace::CrestFunctions::m_crestCl

private

Definition at line 83 of file CrestFunctions.h.

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The documentation for this class was generated from the following files:

• CrestFunctions.h
• CrestFunctions.cxx