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Classes | Public Member Functions | Private Types | Private Member Functions | Private Attributes | Static Private Attributes

edm::FileLocator Class Reference

#include <FileLocator.h>

List of all members.

Classes

struct  Rule

Public Member Functions

 FileLocator (std::string const &catUrl, bool fallback)
std::string lfn (std::string const &ipfn) const
std::string pfn (std::string const &ilfn) const
 ~FileLocator ()

Private Types

typedef std::map< std::string,
Rules
ProtocolRules
typedef std::vector< RuleRules

Private Member Functions

std::string applyRules (ProtocolRules const &protocolRules, std::string const &protocol, std::string const &destination, bool direct, std::string name) const
std::string convert (std::string const &input, ProtocolRules const &rules, bool direct) const
void init (std::string const &catUrl, bool fallback)
void parseRule (xercesc::DOMNode *ruleNode, ProtocolRules &rules)

Private Attributes

std::string m_destination
ProtocolRules m_directRules
std::string m_filename
std::string m_fileType
ProtocolRules m_inverseRules
std::vector< std::string > m_protocols

Static Private Attributes

static int s_numberOfInstances = 0

Detailed Description

Definition at line 13 of file FileLocator.h.


Member Typedef Documentation

typedef std::map<std::string, Rules> edm::FileLocator::ProtocolRules [private]

Definition at line 36 of file FileLocator.h.

typedef std::vector<Rule> edm::FileLocator::Rules [private]

Definition at line 35 of file FileLocator.h.


Constructor & Destructor Documentation

edm::FileLocator::FileLocator ( std::string const &  catUrl,
bool  fallback 
) [explicit]

Definition at line 55 of file FileLocator.cc.

References _toString(), Exception, init(), and s_numberOfInstances.

    : m_destination("any") {
    try {
      //  << "Xerces-c initialization Number "
      //   << s_numberOfInstances <<
      if (s_numberOfInstances == 0) {
        XMLPlatformUtils::Initialize();
      }
    }
    catch (XMLException const& e) {
      // << "Xerces-c error in initialization \n"
      //      << "Exception message is:  \n"
      //      << _toString(e.getMessage()) <<
      throw
        cms::Exception(std::string("Fatal Error on edm::FileLocator:")+ _toString(e.getMessage()));
    }
    ++s_numberOfInstances;

    init(catUrl, fallback);

    // std::cout << m_protocols.size() << " protocols" << std::endl;
    // std::cout << m_directRules[m_protocols[0]].size() << " rules" << std::endl;
  }
edm::FileLocator::~FileLocator ( )

Definition at line 79 of file FileLocator.cc.

  {}

Member Function Documentation

std::string edm::FileLocator::applyRules ( ProtocolRules const &  protocolRules,
std::string const &  protocol,
std::string const &  destination,
bool  direct,
std::string  name 
) const [private]

Definition at line 246 of file FileLocator.cc.

References i, mergeVDriftHistosByStation::name, and cmsCodeRulesChecker::rules.

Referenced by convert().

                                                {

    // std::cerr << "Calling apply rules with protocol: " << protocol << "\n destination: " << destination << "\n " << " on name " << name << std::endl;

    ProtocolRules::const_iterator const rulesIterator = protocolRules.find(protocol);
    if (rulesIterator == protocolRules.end()) {
      return "";
    }

    Rules const& rules = (*(rulesIterator)).second;

    boost::smatch destinationMatches;
    boost::smatch nameMatches;

    /* Look up for a matching rule*/
    for (Rules::const_iterator i = rules.begin(); i != rules.end(); ++i) {

      if (!boost::regex_match(destination, destinationMatches, i->destinationMatch)) {
        continue;
      }

      if (!boost::regex_match(name, i->pathMatch)) {
        continue;
      }

      // std::cerr << "Rule " << i->pathMatch << "matched! " << std::endl;

      std::string const chain = i->chain;
      if ((direct == true) && (chain != "")) {
        name = applyRules(protocolRules, chain, destination, direct, name);
        if (name.empty()) {
          return "";
        }
      }

      boost::regex_match(name, nameMatches, i->pathMatch);
      name = replaceWithRegexp(nameMatches, i->result);

      if ((direct == false) && (chain != "")) {
        name = applyRules(protocolRules, chain, destination, direct, name);
      }
      return name;
    }
    return "";
  }
std::string edm::FileLocator::convert ( std::string const &  input,
ProtocolRules const &  rules,
bool  direct 
) const [private]

Definition at line 94 of file FileLocator.cc.

References applyRules(), m_destination, m_protocols, dbtoconf::out, and pi.

Referenced by lfn(), and pfn().

                                                                                            {
    std::string out = "";

    for (size_t pi = 0, pe = m_protocols.size(); pi != pe; ++pi) {
      out = applyRules(rules, m_protocols[pi], m_destination, direct, input);
      if (!out.empty())
        return out;
    }
    return out;
  }
void edm::FileLocator::init ( std::string const &  catUrl,
bool  fallback 
) [private]

Definition at line 138 of file FileLocator.cc.

References _toDOMS(), findQualityFiles::comma, HDQMDatabaseProducer::configFile, asciidump::doc, Exception, i, edm::Service< T >::isAvailable(), m_destination, m_directRules, m_filename, m_inverseRules, m_protocols, loadConditions::options, geometryXMLtoCSV::parser, parseRule(), cmsCodeRulesChecker::rules, edm::split(), and EcalElecEmulTccFlatFileProducerFromTPG_cfg::tokens.

Referenced by FileLocator().

                                                          {
    std::string m_url = catUrl;

    if (m_url.empty()) {
      Service<SiteLocalConfig> localconfservice;
      if (!localconfservice.isAvailable())
              throw cms::Exception("edm::SiteLocalConfigService is not available");

      m_url = (fallback ? localconfservice->fallbackDataCatalog() : localconfservice->dataCatalog());
    }

    // std::cout << "Connecting to the catalog " << m_url << std::endl;

    if (m_url.find("file:") == std::string::npos) {
      throw cms::Exception("TrivialFileCatalog::connect: Malformed url for file catalog configuration");
    }

    m_url = m_url.erase(0, m_url.find(":") + 1);

    std::vector<std::string> tokens;
    boost::algorithm::split(tokens, m_url, boost::is_any_of(std::string("?")));
    m_filename = tokens[0];

    if (tokens.size() == 2) {
      std::string const options = tokens[1];
      std::vector<std::string> optionTokens;
      boost::algorithm::split(optionTokens, options, boost::is_any_of(std::string("&")));

      std::string const equalSign("=");
      std::string const comma(",");

      for (size_t oi = 0, oe = optionTokens.size(); oi != oe; ++oi) {
        std::string const option = optionTokens[oi];
        std::vector<std::string> argTokens;
        boost::algorithm::split(argTokens, option, boost::is_any_of(equalSign));

        if (argTokens.size() != 2) {
          throw  cms::Exception("TrivialFileCatalog::connect: Malformed url for file catalog configuration");
        }

        if (argTokens[0] == "protocol") {
          boost::algorithm::split(m_protocols, argTokens[1], boost::is_any_of(comma));
        } else if (argTokens[0] == "destination") {
          m_destination = argTokens[1];
        }
      }
    }

    if (m_protocols.empty()) {
      throw cms::Exception("TrivialFileCatalog::connect: protocol was not supplied in the contact string");
    }

    std::ifstream configFile;
    configFile.open(m_filename.c_str());

    //
    // std::cout << "Using catalog configuration " << m_filename << std::endl;

    if (!configFile.good() || !configFile.is_open()) {
      throw cms::Exception("TrivialFileCatalog::connect: Unable to open trivial file catalog " + m_filename);
    }

    configFile.close();

    XercesDOMParser* parser = new XercesDOMParser;
    parser->setValidationScheme(XercesDOMParser::Val_Auto);
    parser->setDoNamespaces(false);
    parser->parse(m_filename.c_str());
    DOMDocument* doc = parser->getDocument();
    assert(doc);

    /* trivialFileCatalog matches the following xml schema
       FIXME: write a proper DTD
       <storage-mapping>
       <lfn-to-pfn protocol="direct" destination-match=".*"
       path-match="lfn/guid match regular expression"
       result="/castor/cern.ch/cms/$1"/>
       <pfn-to-lfn protocol="srm"
       path-match="lfn/guid match regular expression"
       result="$1"/>
       </storage-mapping>
    */

    /*first of all do the lfn-to-pfn bit*/
    {
      DOMNodeList* rules = doc->getElementsByTagName(_toDOMS("lfn-to-pfn"));
      unsigned int const ruleTagsNum = rules->getLength();

      // FIXME: we should probably use a DTD for checking validity

      for (unsigned int i = 0; i < ruleTagsNum; ++i) {
        DOMNode* ruleNode = rules->item(i);
        parseRule(ruleNode, m_directRules);
      }
    }
    /*Then we handle the pfn-to-lfn bit*/
    {
      DOMNodeList* rules = doc->getElementsByTagName(_toDOMS("pfn-to-lfn"));
      unsigned int ruleTagsNum = rules->getLength();

      for (unsigned int i = 0; i < ruleTagsNum; ++i) {
        DOMNode* ruleNode = rules->item(i);
        parseRule(ruleNode, m_inverseRules);
      }
    }
  }
std::string edm::FileLocator::lfn ( std::string const &  ipfn) const

Definition at line 89 of file FileLocator.cc.

References convert(), and m_inverseRules.

                                              {
    return convert(ipfn, m_inverseRules, false);
  }
void edm::FileLocator::parseRule ( xercesc::DOMNode *  ruleNode,
ProtocolRules rules 
) [private]

Definition at line 106 of file FileLocator.cc.

References _toDOMS(), _toString(), Exception, edm::FileLocator::Rule::pathMatch, and query::result.

Referenced by init().

                                                                {
    if (!ruleNode) {
      throw cms::Exception(std::string("TrivialFileCatalog::connect: Malformed trivial catalog"));
    }

    // ruleNode is actually always a DOMElement because it's the result of
    // a `getElementsByTagName()` in the calling method.
    DOMElement* ruleElement = static_cast<DOMElement *>(ruleNode);

    std::string const protocol = _toString(ruleElement->getAttribute(_toDOMS("protocol")));
    std::string destinationMatchRegexp = _toString(ruleElement->getAttribute(_toDOMS("destination-match")));

    if (destinationMatchRegexp.empty()) {
      destinationMatchRegexp = ".*";
    }

    std::string const pathMatchRegexp
      = _toString(ruleElement->getAttribute(_toDOMS("path-match")));
    std::string const result
      = _toString(ruleElement->getAttribute(_toDOMS("result")));
    std::string const chain
      = _toString(ruleElement->getAttribute(_toDOMS("chain")));

    Rule rule;
    rule.pathMatch.assign(pathMatchRegexp);
    rule.destinationMatch.assign(destinationMatchRegexp);
    rule.result = result;
    rule.chain = chain;
    rules[protocol].push_back(rule);
  }
std::string edm::FileLocator::pfn ( std::string const &  ilfn) const

Definition at line 84 of file FileLocator.cc.

References convert(), and m_directRules.

                                              {
    return convert(ilfn, m_directRules, true);
  }

Member Data Documentation

std::string edm::FileLocator::m_destination [private]

Definition at line 59 of file FileLocator.h.

Referenced by convert(), and init().

Direct rules are used to do the mapping from LFN to PFN.

Definition at line 52 of file FileLocator.h.

Referenced by init(), and pfn().

std::string edm::FileLocator::m_filename [private]

Definition at line 57 of file FileLocator.h.

Referenced by init().

std::string edm::FileLocator::m_fileType [private]

Definition at line 56 of file FileLocator.h.

Inverse rules are used to do the mapping from PFN to LFN

Definition at line 54 of file FileLocator.h.

Referenced by init(), and lfn().

std::vector<std::string> edm::FileLocator::m_protocols [private]

Definition at line 58 of file FileLocator.h.

Referenced by convert(), and init().

int edm::FileLocator::s_numberOfInstances = 0 [static, private]

For the time being the only allowed configuration item is a prefix to be added to the GUID/LFN.

Definition at line 26 of file FileLocator.h.

Referenced by FileLocator().