ThreadSafeLogMessageLoggerScribe.cc

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// ----------------------------------------------------------------------
//
// ThreadSafeLogMessageLoggerScribe.cc
//
// NOTE: This was originally copied from MessageLoggerScribe but removed
//  the potential use of the ThreadQueue. MessageLoggerScribe was not
//  modified since it was decided we might have to keep the old behaviour
//  around for 'legacy' reasons.
//
// ----------------------------------------------------------------------
 
#include "FWCore/MessageService/interface/ThreadSafeLogMessageLoggerScribe.h"
#include "FWCore/MessageService/interface/ELadministrator.h"
#include "FWCore/MessageService/interface/ELoutput.h"
#include "FWCore/MessageService/interface/ELstatistics.h"
#include "FWCore/MessageService/interface/ThreadQueue.h"
 
#include "FWCore/MessageLogger/interface/ErrorObj.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "FWCore/MessageLogger/interface/ConfigurationHandshake.h"
#include "FWCore/MessageLogger/interface/MessageDrop.h"      // change log 37
#include "FWCore/MessageLogger/interface/ELseverityLevel.h"  // change log 37
 
#include "FWCore/Utilities/interface/EDMException.h"
#include "FWCore/Utilities/interface/Algorithms.h"
 
#include <algorithm>
#include <cassert>
#include <fstream>
#include <string>
#include <csignal>
 
using std::cerr;
 
namespace edm {
  namespace service {
 
    ThreadSafeLogMessageLoggerScribe::ThreadSafeLogMessageLoggerScribe()
        : admin_p(new ELadministrator()),
          early_dest(admin_p->attach(std::make_shared<ELoutput>(std::cerr, false))),
          file_ps(),
          job_pset_p(),
          clean_slate_configuration(true),
          active(true),
          purge_mode(false)  // changeLog 32
          ,
          count(false)  // changeLog 32
          ,
          m_messageBeingSent(false),
          m_waitingThreshold(100),
          m_tooManyWaitingMessagesCount(0) {}
 
    ThreadSafeLogMessageLoggerScribe::~ThreadSafeLogMessageLoggerScribe() {
      //if there are any waiting message, finish them off
      ErrorObj* errorobj_p = nullptr;
      std::vector<std::string> categories;
      while (m_waitingMessages.try_pop(errorobj_p)) {
        if (not purge_mode) {
          categories.clear();
          parseCategories(errorobj_p->xid().id, categories);
          for (unsigned int icat = 0; icat < categories.size(); ++icat) {
            errorobj_p->setID(categories[icat]);
            admin_p->log(*errorobj_p);  // route the message text
          }
        }
        delete errorobj_p;
      }
 
      admin_p->finish();
    }
 
    void ThreadSafeLogMessageLoggerScribe::runCommand(  // changeLog 32
        MessageLoggerQ::OpCode opcode,
        void* operand) {
      switch (opcode) {  // interpret the work item
        default: {
          assert(false);  // can't happen (we certainly hope!)
          break;
        }
        case MessageLoggerQ::END_THREAD: {
          break;
        }
        case MessageLoggerQ::LOG_A_MESSAGE: {
          ErrorObj* errorobj_p = static_cast<ErrorObj*>(operand);
          try {
            if (active && !purge_mode) {
              log(errorobj_p);
            }
          } catch (cms::Exception& e) {
            ++count;
            std::cerr << "ThreadSafeLogMessageLoggerScribe caught " << count << " cms::Exceptions, text = \n"
                      << e.what() << "\n";
 
            if (count > 25) {
              cerr << "MessageLogger will no longer be processing "
                   << "messages due to errors (entering purge mode).\n";
              purge_mode = true;
            }
          } catch (...) {
            std::cerr << "ThreadSafeLogMessageLoggerScribe caught an unknown exception and "
                      << "will no longer be processing "
                      << "messages. (entering purge mode)\n";
            purge_mode = true;
          }
          break;
        }
        case MessageLoggerQ::CONFIGURE: {  // changelog 17
          job_pset_p =
              std::shared_ptr<PSet>(static_cast<PSet*>(operand));  // propagate_const<T> has no reset() function
          configure_errorlog();
          break;
        }
        case MessageLoggerQ::SUMMARIZE: {
          assert(operand == nullptr);
          try {
            triggerStatisticsSummaries();
          } catch (cms::Exception& e) {
            std::cerr << "ThreadSafeLogMessageLoggerScribe caught exception "
                      << "during summarize:\n"
                      << e.what() << "\n";
          } catch (...) {
            std::cerr << "ThreadSafeLogMessageLoggerScribe caught unkonwn exception type "
                      << "during summarize. (Ignored)\n";
          }
          break;
        }
        case MessageLoggerQ::JOBMODE: {  // change log 24
          std::string* jobMode_p = static_cast<std::string*>(operand);
          JobMode jm = MessageLoggerDefaults::mode(*jobMode_p);
          messageLoggerDefaults = value_ptr<MessageLoggerDefaults>(new MessageLoggerDefaults(jm));
          // Note - since messageLoggerDefaults is a value_ptr,
          //        there is no concern about deleting here.
          delete jobMode_p;  // dispose of the message text
                             // which will have been new-ed
                             // in MessageLogger.cc (service version)
          break;
        }
        case MessageLoggerQ::SHUT_UP: {
          assert(operand == nullptr);
          active = false;
          break;
        }
        case MessageLoggerQ::FLUSH_LOG_Q: {  // changelog 26
          break;
        }
        case MessageLoggerQ::GROUP_STATS: {  // change log 27
          std::string* cat_p = static_cast<std::string*>(operand);
          ELstatistics::noteGroupedCategory(*cat_p);
          delete cat_p;  // dispose of the message text
          break;
        }
        case MessageLoggerQ::FJR_SUMMARY: {  // changelog 29
          std::map<std::string, double>* smp = static_cast<std::map<std::string, double>*>(operand);
          triggerFJRmessageSummary(*smp);
          break;
        }
      }  // switch
 
    }  // ThreadSafeLogMessageLoggerScribe::runCommand(opcode, operand)
 
    void ThreadSafeLogMessageLoggerScribe::log(ErrorObj* errorobj_p) {
      bool expected = false;
      std::unique_ptr<ErrorObj> obj(errorobj_p);
      if (m_messageBeingSent.compare_exchange_strong(expected, true)) {
        std::vector<std::string> categories;
        parseCategories(errorobj_p->xid().id, categories);
        for (unsigned int icat = 0; icat < categories.size(); ++icat) {
          errorobj_p->setID(categories[icat]);
          admin_p->log(*errorobj_p);  // route the message text
        }
        //process any waiting messages
        errorobj_p = nullptr;
        while (not purge_mode and m_waitingMessages.try_pop(errorobj_p)) {
          obj.reset(errorobj_p);
          categories.clear();
          parseCategories(errorobj_p->xid().id, categories);
          for (unsigned int icat = 0; icat < categories.size(); ++icat) {
            errorobj_p->setID(categories[icat]);
            admin_p->log(*errorobj_p);  // route the message text
          }
        }
        m_messageBeingSent.store(false);
      } else {
        if (m_waitingMessages.unsafe_size() < m_waitingThreshold) {
          obj.release();
          m_waitingMessages.push(errorobj_p);
        } else {
          ++m_tooManyWaitingMessagesCount;
        }
      }
    }
 
    void ThreadSafeLogMessageLoggerScribe::configure_errorlog() {
      vString empty_vString;
      String empty_String;
      PSet empty_PSet;
 
      // The following is present to test pre-configuration message handling:
      String preconfiguration_message =
          getAparameter<String>(*job_pset_p, "generate_preconfiguration_message", empty_String);
      if (preconfiguration_message != empty_String) {
        // To test a preconfiguration message without first going thru the
        // configuration we are about to do, we issue the message (so it sits
        // on the queue), then copy the processing that the LOG_A_MESSAGE case
        // does.  We suppress the timestamp to allow for automated unit testing.
        early_dest->suppressTime();
        LogError("preconfiguration") << preconfiguration_message;
      }
 
      if (!stream_ps.empty()) {
        LogWarning("multiLogConfig") << "The message logger has been configured multiple times";
        clean_slate_configuration = false;  // Change Log 22
      }
      m_waitingThreshold = getAparameter<unsigned int>(*job_pset_p, "waiting_threshold", 100);
      configure_ordinary_destinations();  // Change Log 16
      configure_statistics();             // Change Log 16
    }                                     // ThreadSafeLogMessageLoggerScribe::configure_errorlog()
 
    void ThreadSafeLogMessageLoggerScribe::configure_dest(std::shared_ptr<ELdestination> dest_ctrl,
                                                          String const& filename) {
      static const int NO_VALUE_SET = -45654;  // change log 2
      vString empty_vString;
      PSet empty_PSet;
      String empty_String;
 
      // Defaults:                          // change log 3a
      const std::string COMMON_DEFAULT_THRESHOLD = "INFO";
      const int COMMON_DEFAULT_LIMIT = NO_VALUE_SET;
      const int COMMON_DEFAULT_INTERVAL = NO_VALUE_SET;  // change log 6
      const int COMMON_DEFAULT_TIMESPAN = NO_VALUE_SET;
 
      char const* severity_array[] = {"WARNING", "INFO", "ERROR", "DEBUG"};
      vString const severities(severity_array + 0, severity_array + 4);
 
      // grab list of categories
      vString categories = getAparameter<vString>(*job_pset_p, "categories", empty_vString);
 
      // grab list of messageIDs -- these are a synonym for categories
      // Note -- the use of messageIDs is deprecated in favor of categories
      {
        vString messageIDs = getAparameter<vString>(*job_pset_p, "messageIDs", empty_vString);
 
        // combine the lists, not caring about possible duplicates (for now)
        copy_all(messageIDs, std::back_inserter(categories));
      }  // no longer need messageIDs
 
      // grab list of hardwired categories (hardcats) -- these are to be added
      // to the list of categories -- change log 24
      {
        std::vector<std::string> hardcats = messageLoggerDefaults->categories;
        // combine the lists, not caring about possible duplicates (for now)
        copy_all(hardcats, std::back_inserter(categories));
      }  // no longer need hardcats
 
      // grab default threshold common to all destinations
      String default_threshold = getAparameter<String>(*job_pset_p, "threshold", empty_String);
      // change log 3a
      // change log 24
 
      // grab default limit/interval/timespan common to all destinations/categories:
      PSet default_pset = getAparameter<PSet>(*job_pset_p, "default", empty_PSet);
      int default_limit = getAparameter<int>(default_pset, "limit", COMMON_DEFAULT_LIMIT);
      int default_interval = getAparameter<int>(default_pset, "reportEvery", COMMON_DEFAULT_INTERVAL);
      // change log 6, 10
      int default_timespan = getAparameter<int>(default_pset, "timespan", COMMON_DEFAULT_TIMESPAN);
      // change log 2a
      // change log 3a
      String default_pset_threshold = getAparameter<String>(default_pset, "threshold", default_threshold);
      // change log 34
 
      // grab all of this destination's parameters:
      PSet dest_pset = getAparameter<PSet>(*job_pset_p, filename, empty_PSet);
 
      // See if this is just a placeholder          // change log 9
      bool is_placeholder = getAparameter<bool>(dest_pset, "placeholder", false);
      if (is_placeholder)
        return;
 
      // grab this destination's default limit/interval/timespan:
      PSet dest_default_pset = getAparameter<PSet>(dest_pset, "default", empty_PSet);
      int dest_default_limit = getAparameter<int>(dest_default_pset, "limit", default_limit);
      int dest_default_interval = getAparameter<int>(dest_default_pset, "reportEvery", default_interval);
      // change log 6
      int dest_default_timespan = getAparameter<int>(dest_default_pset, "timespan", default_timespan);
      // change log 1a
      if (dest_default_limit != NO_VALUE_SET) {
        if (dest_default_limit < 0)
          dest_default_limit = 2000000000;
        dest_ctrl->setLimit("*", dest_default_limit);
      }                                             // change log 1b, 2a, 2b
      if (dest_default_interval != NO_VALUE_SET) {  // change log 6
        dest_ctrl->setInterval("*", dest_default_interval);
      }
      if (dest_default_timespan != NO_VALUE_SET) {
        if (dest_default_timespan < 0)
          dest_default_timespan = 2000000000;
        dest_ctrl->setTimespan("*", dest_default_timespan);
      }  // change log 1b, 2a, 2b
 
      // establish this destination's threshold:
      String dest_threshold = getAparameter<String>(dest_pset, "threshold", default_threshold);
      if (dest_threshold == empty_String) {
        dest_threshold = default_threshold;
      }
      if (dest_threshold == empty_String) {  // change log 34
        dest_threshold = default_pset_threshold;
      }
      if (dest_threshold == empty_String) {
        dest_threshold = messageLoggerDefaults->threshold(filename);
      }
      if (dest_threshold == empty_String)
        dest_threshold = COMMON_DEFAULT_THRESHOLD;
      ELseverityLevel threshold_sev(dest_threshold);
      dest_ctrl->setThreshold(threshold_sev);
      // change log 37
      if (threshold_sev <= ELseverityLevel::ELsev_success) {
        edm::MessageDrop::debugAlwaysSuppressed = false;
      }
      if (threshold_sev <= ELseverityLevel::ELsev_info) {
        edm::MessageDrop::infoAlwaysSuppressed = false;
      }
      if (threshold_sev <= ELseverityLevel::ELsev_warning) {
        edm::MessageDrop::warningAlwaysSuppressed = false;
      }
 
      // establish this destination's limit/interval/timespan for each category:
      for (vString::const_iterator id_it = categories.begin(); id_it != categories.end(); ++id_it) {
        String msgID = *id_it;
        PSet default_category_pset = getAparameter<PSet>(default_pset, msgID, empty_PSet);  // change log 5
        PSet category_pset = getAparameter<PSet>(dest_pset, msgID, default_category_pset);
 
        int category_default_limit = getAparameter<int>(default_category_pset, "limit", NO_VALUE_SET);
        int limit = getAparameter<int>(category_pset, "limit", category_default_limit);
        if (limit == NO_VALUE_SET)
          limit = dest_default_limit;
        // change log 7
        int category_default_interval = getAparameter<int>(default_category_pset, "reportEvery", NO_VALUE_SET);
        int interval = getAparameter<int>(category_pset, "reportEvery", category_default_interval);
        if (interval == NO_VALUE_SET)
          interval = dest_default_interval;
        // change log 6  and then 7
        int category_default_timespan = getAparameter<int>(default_category_pset, "timespan", NO_VALUE_SET);
        int timespan = getAparameter<int>(category_pset, "timespan", category_default_timespan);
        if (timespan == NO_VALUE_SET)
          timespan = dest_default_timespan;
        // change log 7
 
        const std::string& category = msgID;
        if (limit == NO_VALUE_SET) {  // change log 24
          limit = messageLoggerDefaults->limit(filename, category);
        }
        if (interval == NO_VALUE_SET) {  // change log 24
          interval = messageLoggerDefaults->reportEvery(filename, category);
        }
        if (timespan == NO_VALUE_SET) {  // change log 24
          timespan = messageLoggerDefaults->timespan(filename, category);
        }
 
        if (limit != NO_VALUE_SET) {
          if (limit < 0)
            limit = 2000000000;
          dest_ctrl->setLimit(msgID, limit);
        }  // change log 2a, 2b
        if (interval != NO_VALUE_SET) {
          dest_ctrl->setInterval(msgID, interval);
        }  // change log 6
        if (timespan != NO_VALUE_SET) {
          if (timespan < 0)
            timespan = 2000000000;
          dest_ctrl->setTimespan(msgID, timespan);
        }  // change log 2a, 2b
 
      }  // for
 
      // establish this destination's limit for each severity:
      for (vString::const_iterator sev_it = severities.begin(); sev_it != severities.end(); ++sev_it) {
        String sevID = *sev_it;
        ELseverityLevel severity(sevID);
        PSet default_sev_pset = getAparameter<PSet>(default_pset, sevID, empty_PSet);
        PSet sev_pset = getAparameter<PSet>(dest_pset, sevID, default_sev_pset);
        // change log 5
        int limit = getAparameter<int>(sev_pset, "limit", NO_VALUE_SET);
        if (limit == NO_VALUE_SET) {  // change log 24
          limit = messageLoggerDefaults->sev_limit(filename, sevID);
        }
        if (limit != NO_VALUE_SET) {
          if (limit < 0)
            limit = 2000000000;  // change log 38
          dest_ctrl->setLimit(severity, limit);
        }
        int interval = getAparameter<int>(sev_pset, "reportEvery", NO_VALUE_SET);
        if (interval == NO_VALUE_SET) {  // change log 24
          interval = messageLoggerDefaults->sev_reportEvery(filename, sevID);
        }
        if (interval != NO_VALUE_SET)
          dest_ctrl->setInterval(severity, interval);
        // change log 2
        int timespan = getAparameter<int>(sev_pset, "timespan", NO_VALUE_SET);
        if (timespan == NO_VALUE_SET) {  // change log 24
          timespan = messageLoggerDefaults->sev_timespan(filename, sevID);
        }
        if (timespan != NO_VALUE_SET) {
          if (timespan < 0)
            timespan = 2000000000;  // change log 38
          dest_ctrl->setTimespan(severity, timespan);
        }
      }  // for
 
      // establish this destination's linebreak policy:
      bool noLineBreaks_default = getAparameter<bool>(default_pset, "noLineBreaks", false);
      // change log 5
      bool noLineBreaks = getAparameter<bool>(dest_pset, "noLineBreaks", noLineBreaks_default);
      if (noLineBreaks) {
        dest_ctrl->setLineLength(32000);
      } else {
        int lenDef = 80;
        int lineLen_default = getAparameter<int>(default_pset, "lineLength", lenDef);
        // change log 5
        int lineLen = getAparameter<int>(dest_pset, "lineLength", lineLen_default);
        if (lineLen != lenDef) {
          dest_ctrl->setLineLength(lineLen);
        }
      }
 
      // if indicated, suppress time stamps in this destination's output
      bool suppressTime_default = getAparameter<bool>(default_pset, "noTimeStamps", false);
      bool suppressTime = getAparameter<bool>(dest_pset, "noTimeStamps", suppressTime_default);
      if (suppressTime) {
        dest_ctrl->suppressTime();
      }
 
    }  // ThreadSafeLogMessageLoggerScribe::configure_dest()
 
    void ThreadSafeLogMessageLoggerScribe::configure_ordinary_destinations()  // Changelog 16
    {
      vString empty_vString;
      String empty_String;
      PSet empty_PSet;
 
      // Initialize unversal suppression variables
      MessageDrop::debugAlwaysSuppressed = true;    // change log 37
      MessageDrop::infoAlwaysSuppressed = true;     // change log 37
      MessageDrop::warningAlwaysSuppressed = true;  // change log 37
 
      // grab list of destinations:
      vString destinations = getAparameter<vString>(*job_pset_p, "destinations", empty_vString);
 
      // Use the default list of destinations if and only if the grabbed list is
      // empty                          // change log 24
      if (destinations.empty()) {
        destinations = messageLoggerDefaults->destinations;
      }
 
      // dial down the early destination if other dest's are supplied:
      if (!destinations.empty())
        early_dest->setThreshold(ELhighestSeverity);
 
      // establish each destination:
      for (vString::const_iterator it = destinations.begin(); it != destinations.end(); ++it) {
        String filename = *it;
        String psetname = filename;
 
        // check that this destination is not just a placeholder // change log 11
        PSet dest_pset = getAparameter<PSet>(*job_pset_p, psetname, empty_PSet);
        bool is_placeholder = getAparameter<bool>(dest_pset, "placeholder", false);
        if (is_placeholder)
          continue;
 
        // Modify the file name if extension or name is explicitly specified
        // change log 14
 
        // Although for an ordinary destination there is no output attribute
        // for the cfg (you can use filename instead) we provide output() for
        // uniformity with the statistics destinations.  The "right way" to
        // work this would have been to provide a filename() method, along with
        // an extension() method.  We recognize the potential name confusion here
        // (filename(filename))!
 
        // Determine the destination file name to use if no explicit filename is
        // supplied in the cfg.
        String filename_default = getAparameter<String>(dest_pset, "output", empty_String);
        if (filename_default == empty_String) {
          filename_default = messageLoggerDefaults->output(psetname);  // change log 31
          if (filename_default == empty_String) {
            filename_default = filename;
          }
        }
 
        String explicit_filename = getAparameter<String>(dest_pset, "filename", filename_default);
        if (explicit_filename != empty_String)
          filename = explicit_filename;
        String explicit_extension = getAparameter<String>(dest_pset, "extension", empty_String);
        if (explicit_extension != empty_String) {
          if (explicit_extension[0] == '.') {
            filename += explicit_extension;
          } else {
            filename = filename + "." + explicit_extension;
          }
        }
 
        // Attach a default extension of .log if there is no extension on a file
        // change log 18 - this had been done in concert with attaching destination
 
        std::string actual_filename = filename;  // change log 4
        if ((filename != "cout") && (filename != "cerr")) {
          const std::string::size_type npos = std::string::npos;
          if (filename.find('.') == npos) {
            actual_filename += ".log";
          }
        }
 
        // Check that this is not a duplicate name          // change log 18
        if (stream_ps.find(actual_filename) != stream_ps.end()) {
          if (clean_slate_configuration) {    // change log 22
                                              //        throw edm::Exception ( edm::errors::Configuration )
            LogError("duplicateDestination")  // change log 35
                << "Duplicate name for a MessageLogger Destination: " << actual_filename << "\n"
                << "Only the first configuration instructions are used";
            continue;
          } else {
            LogWarning("duplicateDestination")
                << "Duplicate name for a MessageLogger Destination: " << actual_filename << "\n"
                << "Only original configuration instructions are used";
            continue;
          }
        }
 
        ordinary_destination_filenames.push_back(actual_filename);
 
        // attach the current destination, keeping a control handle to it:
        std::shared_ptr<ELdestination> dest_ctrl;
        if (actual_filename == "cout") {
          dest_ctrl = admin_p->attach(std::make_shared<ELoutput>(std::cout));
          stream_ps["cout"] = &std::cout;
        } else if (actual_filename == "cerr") {
          early_dest->setThreshold(ELzeroSeverity);
          dest_ctrl = early_dest;
          stream_ps["cerr"] = &std::cerr;
        } else {
          auto os_sp = std::make_shared<std::ofstream>(actual_filename.c_str());
          file_ps.push_back(os_sp);
          dest_ctrl = admin_p->attach(std::make_shared<ELoutput>(*os_sp));
          stream_ps[actual_filename] = os_sp.get();
        }
 
        // now configure this destination:
        configure_dest(dest_ctrl, psetname);
 
      }  // for [it = destinations.begin() to end()]
 
    }  // configure_ordinary_destinations
 
    void ThreadSafeLogMessageLoggerScribe::configure_statistics() {
      vString empty_vString;
      String empty_String;
      PSet empty_PSet;
 
      // grab list of statistics destinations:
      vString statistics = getAparameter<vString>(*job_pset_p, "statistics", empty_vString);
 
      bool no_statistics_configured = statistics.empty();  // change log 24
 
      if (no_statistics_configured) {
        // Read the list of staistics destinations from hardwired defaults,
        // but only if there is also no list of ordinary destinations.
        // (If a cfg specifies destinations, and no statistics, assume that
        // is what the user wants.)
        vString destinations = getAparameter<vString>(*job_pset_p, "destinations", empty_vString);
        if (destinations.empty()) {
          statistics = messageLoggerDefaults->statistics;
          no_statistics_configured = statistics.empty();
        }
      }
 
      // establish each statistics destination:
      for (vString::const_iterator it = statistics.begin(); it != statistics.end(); ++it) {
        String statname = *it;
        const String& psetname = statname;
 
        // check that this destination is not just a placeholder // change log 20
        PSet stat_pset = getAparameter<PSet>(*job_pset_p, psetname, empty_PSet);
        bool is_placeholder = getAparameter<bool>(stat_pset, "placeholder", false);
        if (is_placeholder)
          continue;
 
        // Determine the destination file name
        String filename = getAparameter<String>(stat_pset, "output", empty_String);
        if (filename == empty_String) {
          filename = messageLoggerDefaults->output(psetname);  // change log 31
          if (filename == empty_String) {
            filename = statname;
          }
        }
 
        // Modify the file name if extension or name is explicitly specified
        // change log 14 -- probably suspenders and a belt, because ouput option
        // is present, but uniformity is nice.
 
        String explicit_filename = getAparameter<String>(stat_pset, "filename", filename);
        if (explicit_filename != empty_String)
          filename = explicit_filename;
        String explicit_extension = getAparameter<String>(stat_pset, "extension", empty_String);
        if (explicit_extension != empty_String) {
          if (explicit_extension[0] == '.') {
            filename += explicit_extension;
          } else {
            filename = filename + "." + explicit_extension;
          }
        }
 
        // Attach a default extension of .log if there is no extension on a file
        // change log 18 - this had been done in concert with attaching destination
 
        std::string actual_filename = filename;              // change log 4
        if ((filename != "cout") && (filename != "cerr")) {  // change log 23
          const std::string::size_type npos = std::string::npos;
          if (filename.find('.') == npos) {
            actual_filename += ".log";
          }
        }
 
        // Check that this is not a duplicate name -
        // unless it is an ordinary destination (which stats can share)
        if (!search_all(ordinary_destination_filenames, actual_filename)) {
          if (stream_ps.find(actual_filename) != stream_ps.end()) {
            if (clean_slate_configuration) {  // change log 22
              throw edm::Exception(edm::errors::Configuration)
                  << "Duplicate name for a MessageLogger Statistics Destination: " << actual_filename << "\n";
            } else {
              LogWarning("duplicateDestination")
                  << "Duplicate name for a MessageLogger Statistics Destination: " << actual_filename << "\n"
                  << "Only original configuration instructions are used";
              continue;
            }
          }
        }
 
        // create (if statistics file does not match any destination file name)
        // or note (if statistics file matches a destination file name) the ostream.
        // But if no statistics destinations were provided in the config, do not
        // create a new destination for this hardwired statistics - only act if
        // it is matches a destination.  (shange log 24)
        bool statistics_destination_is_real = !no_statistics_configured;
        std::ostream* os_p;
        if (stream_ps.find(actual_filename) == stream_ps.end()) {
          if (actual_filename == "cout") {
            os_p = &std::cout;
          } else if (actual_filename == "cerr") {
            os_p = &std::cerr;
          } else {
            auto os_sp = std::make_shared<std::ofstream>(actual_filename.c_str());
            file_ps.push_back(os_sp);
            os_p = os_sp.get();
          }
          stream_ps[actual_filename] = os_p;
        } else {
          statistics_destination_is_real = true;  // change log 24
          os_p = stream_ps[actual_filename];
        }
 
        if (statistics_destination_is_real) {  // change log 24
                                               // attach the statistics destination, keeping a control handle to it:
          auto stat = std::make_shared<ELstatistics>(*os_p);
          admin_p->attach(stat);
          statisticsDestControls.push_back(stat);
          bool reset = getAparameter<bool>(stat_pset, "reset", false);
          statisticsResets.push_back(reset);
 
          // now configure this destination:
          configure_dest(stat, psetname);
 
          // and suppress the desire to do an extra termination summary just because
          // of end-of-job info messages
          stat->noTerminationSummary();
        }
 
      }  // for [it = statistics.begin() to end()]
 
    }  // configure_statistics
 
    void ThreadSafeLogMessageLoggerScribe::parseCategories(std::string const& s, std::vector<std::string>& cats) {
      const std::string::size_type npos = std::string::npos;
      std::string::size_type i = 0;
      while (i != npos) {
        std::string::size_type j = s.find('|', i);
        cats.push_back(s.substr(i, j - i));
        i = j;
        while ((i != npos) && (s[i] == '|'))
          ++i;
        // the above handles cases of || and also | at end of string
      }
      // Note:  This algorithm assigns, as desired, one null category if it
      //        encounters an empty categories string
    }
 
    void ThreadSafeLogMessageLoggerScribe::triggerStatisticsSummaries() {
      assert(statisticsDestControls.size() == statisticsResets.size());
      for (unsigned int i = 0; i != statisticsDestControls.size(); ++i) {
        statisticsDestControls[i]->summary(m_tooManyWaitingMessagesCount.load());
        if (statisticsResets[i])
          statisticsDestControls[i]->wipe();
      }
    }
 
    void ThreadSafeLogMessageLoggerScribe::triggerFJRmessageSummary(std::map<std::string, double>& sm)  // ChangeLog 29
    {
      if (statisticsDestControls.empty()) {
        sm["NoStatisticsDestinationsConfigured"] = 0.0;
      } else {
        statisticsDestControls[0]->summaryForJobReport(sm);
      }
    }
 
  }  // end of namespace service
}  // end of namespace edm