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File indexing completed on 2021-10-22 02:31:13

 // silence deprecation warnings for the DQMStore itself.
 #define DQM_DEPRECATED
 #include "DQMServices/Core/interface/DQMStore.h"
 #include "DQMServices/Core/interface/LegacyIOHelper.h"
 #include "FWCore/MessageLogger/interface/MessageLogger.h"
 #include "FWCore/ServiceRegistry/interface/GlobalContext.h"
 #include <string>
 #include <regex>
 #include <csignal>
 
 #include <execinfo.h>
 #include <cxxabi.h>
 
 namespace dqm::implementation {
 
   std::string NavigatorBase::pwd() {
     if (cwd_.empty()) {
       return "";
     } else {
       // strip trailing slash.
       // This is inefficient and error prone (callers need to do the same
       // branching to re-add the "/"!) but some legacy code expects it like
       // that and is to complicated to change.
       assert(cwd_[cwd_.size() - 1] == '/');
       auto pwd = cwd_.substr(0, cwd_.size() - 1);
       return pwd;
     }
   }
   void NavigatorBase::cd() { setCurrentFolder(""); }
   void NavigatorBase::cd(std::string const& dir) { setCurrentFolder(dir); }
   void NavigatorBase::goUp() { cd(cwd_ + ".."); }
   void NavigatorBase::setCurrentFolder(std::string const& fullpath) {
     MonitorElementData::Path path;
     path.set(fullpath, MonitorElementData::Path::Type::DIR);
     assert(this);
     cwd_ = path.getDirname();
   }
 
   IBooker::IBooker(DQMStore* store) {
     store_ = store;
     scope_ = MonitorElementData::Scope::JOB;
   }
 
   IBooker::~IBooker() {}
 
   MonitorElementData::Scope IBooker::setScope(MonitorElementData::Scope newscope) {
     auto oldscope = scope_;
     scope_ = newscope;
     return oldscope;
   }
   uint64_t IBooker::setModuleID(uint64_t moduleID) {
     auto oldid = moduleID_;
     moduleID_ = moduleID;
     return oldid;
   }
 
   edm::LuminosityBlockID IBooker::setRunLumi(edm::LuminosityBlockID runlumi) {
     auto oldrunlumi = runlumi_;
     runlumi_ = runlumi;
     return oldrunlumi;
   }
 
   MonitorElement* IBooker::bookME(TString const& name,
                                   MonitorElementData::Kind kind,
                                   std::function<TH1*()> makeobject,
                                   bool forceReplace /* = false */) {
     MonitorElementData::Path path;
     std::string fullpath = cwd_ + std::string(name.View());
     path.set(fullpath, MonitorElementData::Path::Type::DIR_AND_NAME);
 
     // We should check if there is a local ME for this module and name already.
     // However, it is easier to do that in putME().
 
     MonitorElement* me = store_->findME(path);
     store_->printTrace("Booking " + std::string(name) + (me ? " (existing)" : " (new)"));
 
     if (me == nullptr) {
       // no existing global ME found. We need to instantiate one, and put it
       // into the DQMStore. This will typically be a prototype, unless run and
       // lumi are set and we proces a legacy booking call.
       TH1* th1 = makeobject();
       MonitorElementData medata;
       medata.key_.path_ = path;
       medata.key_.kind_ = kind;
       medata.key_.scope_ = this->scope_;
 
       // will be (0,0) ( = prototype) in the common case.
       // This branching is for harvesting, where we have run/lumi in the booker.
       if (this->scope_ == MonitorElementData::Scope::JOB) {
         medata.key_.id_ = edm::LuminosityBlockID();
       } else if (this->scope_ == MonitorElementData::Scope::RUN) {
         medata.key_.id_ = edm::LuminosityBlockID(this->runlumi_.run(), 0);
       } else if (this->scope_ == MonitorElementData::Scope::LUMI) {
         // In the messy case of legacy-booking a LUMI ME in beginRun (or
         // similar), where we don't have a valid lumi number yet, make sure to
         // book a prototype instead.
         if (this->runlumi_.run() != 0 && this->runlumi_.luminosityBlock() != 0) {
           medata.key_.id_ = this->runlumi_;
         } else {
           medata.key_.id_ = edm::LuminosityBlockID();
         }
       } else {
         assert(!"Illegal scope");
       }
 
       medata.value_.object_ = std::unique_ptr<TH1>(th1);
       MonitorElement* me_ptr = new MonitorElement(std::move(medata));
       me = store_->putME(me_ptr);
     } else {
       if (forceReplace) {
         TH1* th1 = makeobject();
         assert(th1);
         store_->debugTrackME("bookME (forceReplace)", nullptr, me);
         // surgically replace Histogram
         me->switchObject(std::unique_ptr<TH1>(th1));
       }
     }
 
     // me now points to a global ME owned by the DQMStore.
     assert(me);
 
     // each booking call returns a unique "local" ME, which the DQMStore keeps
     // in a container associated with the module (and potentially run, for
     // DQMGlobalEDAnalyzer). This will later be update to point to different
     // MEData (kept in a global ME) as needed.
     // putME creates the local ME object as needed.
     auto localme = store_->putME(me, this->moduleID_);
     // me now points to a local ME owned by the DQMStore.
     assert(localme);
 
     if (this->moduleID_ == 0) {
       // this is a legacy/global/harvesting booking. In this case, we return
       // the global directly. It is not advisable to hold this pointer, as we
       // may delete the global ME later, but we promise to keep it valid for
       // the entire job if there are no concurrent runs/lumis. (see
       // assertLegacySafe option).
       // We still created a local ME, so we can drive the lumi-changing for
       // legacy modules in watchPreGlobalBeginLumi.
       store_->debugTrackME("bookME (legacy)", localme, me);
       return me;
     } else {
       // the normal case.
       store_->debugTrackME("bookME (normal)", localme, me);
       return localme;
     }
   }
 
   MonitorElement* DQMStore::putME(MonitorElement* me) {
     auto lock = std::scoped_lock(this->booking_mutex_);
     assert(me);
     auto existing_new = globalMEs_[me->getRunLumi()].insert(me);
     if (existing_new.second == true) {
       // successfully inserted, return new object
       debugTrackME("putME (global)", nullptr, me);
       return me;
     } else {
       // already present, return old object
       delete me;
       assert(!"Currently, this should never happen.");
       return *(existing_new.first);
     }
   }
 
   MonitorElement* DQMStore::putME(MonitorElement* me, uint64_t moduleID) {
     auto lock = std::scoped_lock(this->booking_mutex_);
     assert(me);
     auto& localmes = localMEs_[moduleID];
     auto existing = localmes.find(me);
     if (existing == localmes.end()) {
       // insert new local ME
       MonitorElement* local_me = new MonitorElement(me);
       auto existing_new = localmes.insert(local_me);
       // successfully inserted, return new object
       assert(existing_new.second == true);  // insert successful
       debugTrackME("putME (local, new)", local_me, me);
       return local_me;
     } else {
       // already present, return old object
       auto local_me = *existing;
       edm::LogInfo("DQMStore") << "ME " << me->getFullname() << " booked twice in the same module.";
       // the existing local ME might not have data attached (e.g. in 2nd run)
       // in that case, we attach the global ME provided by booking above.
       // This may be a prototype or of a random run/lumi, but it ensures that
       // even LUMI histos are always valid after booking (as we promise for
       // legacy modules -- for sequential runs/lumis, there is only ever one
       // global ME, and the local one points to it).
       if (!local_me->isValid()) {
         local_me->switchData(me);
       }
       debugTrackME("putME (local, existing)", local_me, me);
       return local_me;
     }
   }
 
   template <typename MELIKE>
   MonitorElement* DQMStore::findME(MELIKE const& path) {
     auto lock = std::scoped_lock(this->booking_mutex_);
     for (auto& [runlumi, meset] : this->globalMEs_) {
       auto it = meset.find(path);
       if (it != meset.end()) {
         debugTrackME("findME (found)", nullptr, *it);
         // no guarantee on which ME we return here -- only that clone'ing this
         // would give a valid ME for that path.
         return *it;
       }
     }
     return nullptr;
   }
 
   void DQMStore::printTrace(std::string const& message) {
     if (verbose_ < 3)
       return;
     edm::LogWarning("DQMStoreBooking").log([&](auto& logger) {
       std::regex s_rxtrace{"(.*)\\((.*)\\+0x.*\\).*(\\[.*\\])"};
       std::regex s_rxself{"^[^()]*dqm::implementation::.*|^[^()]*edm::.*|.*edm::convertException::wrap.*"};
 
       void* array[10];
       size_t size;
       char** strings;
       int demangle_status = 0;
       std::vector<std::string> clean_trace;
 
       // glibc/libgcc backtrace functionality, declared in execinfo.h.
       size = backtrace(array, 10);
       strings = backtrace_symbols(array, size);
 
       size_t level = 1;
       char* demangled = nullptr;
       for (; level < size; ++level) {
         std::cmatch match;
         bool ok = std::regex_match(strings[level], match, s_rxtrace);
 
         if (!ok) {
           edm::LogWarning("DQMStoreBacktrace") << "failed match" << level << strings[level];
           continue;
         }
 
         if (match[2].length() == 0) {
           // no symbol, ignore.
           continue;
         }
 
         // demangle name to human readable form
         demangled = abi::__cxa_demangle(std::string(match[2]).c_str(), nullptr, nullptr, &demangle_status);
         if (!demangled || demangle_status != 0) {
           edm::LogWarning("DQMStoreBacktrace") << "failed demangle! status " << demangle_status << " on " << match[2];
           continue;
         }
 
         if (std::regex_match(demangled, s_rxself)) {
           // ignore framework/internal methods
           free(demangled);
           demangled = nullptr;
           continue;
         } else {
           // keep the demangled name and the address.
           // The address can be resolved to a line number in gdb attached to
           // the process, using `list *0x<addr>`, but it can only be done in
           // the running process and we can"t easily do it in this code.
           clean_trace.push_back(std::string(demangled) + std::string(match[3]));
           free(demangled);
           demangled = nullptr;
         }
       }
 
       if (!clean_trace.empty()) {
         logger << message << " at ";
         for (auto const& s : clean_trace) {
           logger << s << "; ";
         }
       } else {
         logger << message << " : failed to collect stack trace.";
       }
 
       free(strings);
     });
   }
 
   void DQMStore::debugTrackME(const char* message, MonitorElement* me_local, MonitorElement* me_global) const {
     const char* scopename[] = {"INVALID", "JOB", "RUN", "LUMI"};
     if (!this->trackME_.empty() && (me_local || me_global)) {
       std::string name = me_global ? me_global->getFullname() : me_local->getFullname();
       if (name.find(this->trackME_) != std::string::npos) {
         edm::LogWarning("DQMStoreTrackME").log([&](auto& logger) {
           logger << message << " for " << name << "(" << me_local << "," << me_global << ")";
           auto writeme = [&](MonitorElement* me) {
             if (me->isValid()) {
               logger << " " << me->getRunLumi() << " scope " << scopename[me->getScope()];
               if (me->kind() >= MonitorElement::Kind::TH1F) {
                 logger << " entries " << me->getEntries();
               } else if (me->kind() == MonitorElement::Kind::STRING) {
                 logger << " value " << me->getStringValue();
               } else if (me->kind() == MonitorElement::Kind::REAL) {
                 logger << " value " << me->getFloatValue();
               } else if (me->kind() == MonitorElement::Kind::INT) {
                 logger << " value " << me->getIntValue();
               }
             } else {
               logger << " (invalid)";
             }
           };
           if (me_local) {
             logger << "  local:";
             writeme(me_local);
           }
           if (me_global) {
             logger << "  global:";
             writeme(me_global);
           }
         });
         // A breakpoint can be useful here.
         //std::raise(SIGINT);
       }
     }
   }
 
   MonitorElement* DQMStore::findOrRecycle(MonitorElementData::Key const& key) {
     // This is specifically for DQMRootSource, or other input modules. These
     // are special in that they use the legacy interface (no moduleID, no local
     // MEs) but need to be able to handle concurrent lumisections correctly.
     // The logic is very similar to that in enterLumi; this is enterLumi for
     // Input Modules.
     auto lock = std::scoped_lock(this->booking_mutex_);
     auto existing = this->get(key);
     if (existing) {
       // exactly matching ME found, needs merging with the new data.
       debugTrackME("findOrRecycle (found)", nullptr, existing);
       return existing;
     }  // else
 
     // this is where we'd expect the ME.
     auto& targetset = this->globalMEs_[key.id_];
     // this is where we can get MEs to reuse.
     auto& prototypes = this->globalMEs_[edm::LuminosityBlockID()];
 
     auto proto = prototypes.find(key.path_);
     if (proto != prototypes.end()) {
       MonitorElement* oldme = *proto;
       assert(oldme->getScope() == key.scope_);
       prototypes.erase(proto);
       auto medata = oldme->release();  // destroy the ME, get its data.
       // in this situation, nobody should be filling the ME concurrently.
       medata->data_.key_.id_ = key.id_;
       // We reuse the ME object here, even if we don't have to. This ensures
       // that when running single-threaded without concurrent lumis/runs,
       // the global MEs will also live forever and allow legacy usages.
       oldme->switchData(medata);
       auto result = targetset.insert(oldme);
       assert(result.second);       // was new insertion
       auto newme = *result.first;  // iterator to new ME
       assert(oldme == newme);      // recycling!
       // newme is reset and ready to accept data.
       debugTrackME("findOrRecycle (recycled)", nullptr, newme);
       return newme;
     }  // else
 
     return nullptr;
   }
 
   void DQMStore::initLumi(edm::RunNumber_t run, edm::LuminosityBlockNumber_t lumi) {
     // Call initLumi for all modules, as a global operation.
     auto lock = std::scoped_lock(this->booking_mutex_);
     for (auto& kv : this->localMEs_) {
       initLumi(run, lumi, kv.first);
     }
   }
 
   void DQMStore::initLumi(edm::RunNumber_t run, edm::LuminosityBlockNumber_t lumi, uint64_t moduleID) {
     // Make sure global MEs for the run/lumi exist (depending on scope)
 
     auto lock = std::scoped_lock(this->booking_mutex_);
 
     // these are the MEs we need to update.
     auto& localset = this->localMEs_[moduleID];
     // this is where they need to point to.
     // This could be a per-run or per-lumi set (depending on lumi == 0)
     auto& targetset = this->globalMEs_[edm::LuminosityBlockID(run, lumi)];
     // this is where we can get MEs to reuse.
     auto& prototypes = this->globalMEs_[edm::LuminosityBlockID()];
 
     auto checkScope = [run, lumi](MonitorElementData::Scope scope) {
       if (scope == MonitorElementData::Scope::JOB) {
         return (run == 0 && lumi == 0);
       } else if (scope == MonitorElementData::Scope::RUN) {
         return (run != 0 && lumi == 0);
       } else if (scope == MonitorElementData::Scope::LUMI) {
         return (lumi != 0);
       }
       assert(!"Impossible Scope.");
       return false;
     };
 
     for (MonitorElement* me : localset) {
       auto target = targetset.find(me);  // lookup by path, thanks to MEComparison
       if (target != targetset.end()) {
         // we already have a ME, just use it!
         debugTrackME("initLumi (existing)", nullptr, *target);
       } else {
         // look for a prototype to reuse.
         auto proto = prototypes.find(me);
         if (proto != prototypes.end()) {
           // first, check if this ME needs updating at all. We can only check
           // the scope once we have an actual global ME instance, the local ME
           // might not have any data attached!
           if (checkScope((*proto)->getScope()) == false) {
             continue;
           }  // else
           // reuse that.
           MonitorElement* oldme = *proto;
           prototypes.erase(proto);
           auto medata = oldme->release();  // destroy the ME, get its data.
           // in this situation, nobody should be filling the ME concurrently.
           medata->data_.key_.id_ = edm::LuminosityBlockID(run, lumi);
           // We reuse the ME object here, even if we don't have to. This ensures
           // that when running single-threaded without concurrent lumis/runs,
           // the global MEs will also live forever and allow legacy usages.
           oldme->switchData(medata);
           auto result = targetset.insert(oldme);
           assert(result.second);  // was new insertion
           target = result.first;  // iterator to new ME
           debugTrackME("initLumi (reused)", nullptr, *target);
         } else {
           // no prototype available. That means we have concurrent Lumis/Runs,
           // and need to make a clone now.
           auto anyme = this->findME(me);
           assert(anyme || !"local ME without any global ME!");
           if (checkScope(anyme->getScope()) == false) {
             continue;
           }  // else
 
           // whenever we clone global MEs, it is no longer safe to hold
           // pointers to them.
           assert(!assertLegacySafe_);
 
           MonitorElementData newdata = anyme->cloneMEData();
           newdata.key_.id_ = edm::LuminosityBlockID(run, lumi);
           auto newme = new MonitorElement(std::move(newdata));
           newme->Reset();  // we cloned a ME in use, not an empty prototype
           auto result = targetset.insert(newme);
           assert(result.second);  // was new insertion
           target = result.first;  // iterator to new ME
           debugTrackME("initLumi (allocated)", nullptr, *target);
         }
       }
     }
   }
 
   void DQMStore::enterLumi(edm::RunNumber_t run, edm::LuminosityBlockNumber_t lumi, uint64_t moduleID) {
     // point the local MEs for this module to these global MEs.
 
     // This needs to happen before we can use the global MEs for this run/lumi here.
     // We could do it lazyly here, or eagerly globally in global begin lumi.
     //initLumi(run, lumi, moduleID);
 
     auto lock = std::scoped_lock(this->booking_mutex_);
 
     // these are the MEs we need to update.
     auto& localset = this->localMEs_[moduleID];
     // this is where they need to point to.
     auto& targetset = this->globalMEs_[edm::LuminosityBlockID(run, lumi)];
 
     // only for a sanity check
     auto checkScope = [run, lumi](MonitorElementData::Scope scope) {
       if (scope == MonitorElementData::Scope::JOB) {
         return (run == 0 && lumi == 0);
       } else if (scope == MonitorElementData::Scope::RUN) {
         return (run != 0 && lumi == 0);
       } else if (scope == MonitorElementData::Scope::LUMI) {
         return (lumi != 0);
       }
       assert(!"Impossible Scope.");
       return false;
     };
 
     for (MonitorElement* me : localset) {
       auto target = targetset.find(me);  // lookup by path, thanks to MEComparison
       if (target == targetset.end()) {
         auto anyme = this->findME(me);
         debugTrackME("enterLumi (nothingtodo)", me, nullptr);
         assert(anyme && checkScope(anyme->getScope()) == false);
         continue;
       }
       assert(target != targetset.end());  // initLumi should have taken care of this.
       // now we have the proper global ME in the right place, point the local there.
       // This is only safe if the name is exactly the same -- else it might corrupt
       // the tree structure of the set!
       me->switchData(*target);
       debugTrackME("enterLumi (switchdata)", me, *target);
     }
   }
 
   void DQMStore::leaveLumi(edm::RunNumber_t run, edm::LuminosityBlockNumber_t lumi, uint64_t moduleID) {
     // here, we remove the pointers in the local MEs. No deletion or recycling
     // yet -- this has to happen after the output module had a chance to do its
     // work. We just leave the global MEs where they are. This is purely an
     // accounting step, the cleanup code has to check that nobody is using the
     // ME any more, and here we make sure that is the case.
 
     auto lock = std::scoped_lock(this->booking_mutex_);
 
     // these are the MEs we need to update.
     auto& localset = this->localMEs_[moduleID];
 
     auto checkScope = [run, lumi](MonitorElementData::Scope scope) {
       if (scope == MonitorElementData::Scope::JOB) {
         return (run == 0 && lumi == 0);
       } else if (scope == MonitorElementData::Scope::RUN) {
         return (run != 0 && lumi == 0);
       } else if (scope == MonitorElementData::Scope::LUMI) {
         return (lumi != 0);
       }
       assert(!"Impossible Scope.");
       return false;
     };
 
     for (MonitorElement* me : localset) {
       // we have to be very careful with the ME here, it might not be backed by data at all.
       if (me->isValid() && checkScope(me->getScope()) == true) {
         // if we left the scope, simply release the data.
         debugTrackME("leaveLumi (release)", me, nullptr);
         me->release();
       }
     }
   }
 
   void DQMStore::cleanupLumi(edm::RunNumber_t run, edm::LuminosityBlockNumber_t lumi) {
     // now, we are done with the lumi, no modules have any work to do on these
     // MEs, and the output modules have saved this lumi/run. Remove/recycle
     // the MEs here.
 
     auto lock = std::scoped_lock(this->booking_mutex_);
 
     // in case of end-job cleanup we need different logic because of the
     // prototype set.
     assert(run != 0 || lumi != 0);
     auto& prototypes = this->globalMEs_[edm::LuminosityBlockID()];
 
     // these are the MEs we need to get rid of...
     auto meset = std::set<MonitorElement*, MonitorElement::MEComparison>();
     // ... we take them out first.
     meset.swap(this->globalMEs_[edm::LuminosityBlockID(run, lumi)]);
 
     // temporary buffer for the MEs to recycle, we must not change the key
     // while they are in a set.
     auto torecycle = std::vector<MonitorElement*>();
 
     // here, this is only a sanity check and not functionally needed.
     auto checkScope = [run, lumi](MonitorElementData::Scope scope) {
       if (scope == MonitorElementData::Scope::JOB) {
         assert(run == 0 && lumi == 0);
       } else if (scope == MonitorElementData::Scope::RUN) {
         assert(run != 0 && lumi == 0);
       } else if (scope == MonitorElementData::Scope::LUMI) {
         assert(lumi != 0);
       } else {
         assert(!"Impossible Scope.");
       }
     };
 
     for (MonitorElement* me : meset) {
       assert(me->isValid());       // global MEs should always be valid.
       checkScope(me->getScope());  // we should only see MEs of one scope here.
       auto other = this->findME(me);
       if (other) {
         // we still have a global one, so we can just remove this.
         debugTrackME("cleanupLumi (delete)", nullptr, me);
         delete me;
       } else {
         // we will modify the ME, so it needs to be out of the set.
         // use a temporary vector to be save.
         debugTrackME("cleanupLumi (recycle)", nullptr, me);
         torecycle.push_back(me);
       }
     }
 
     meset.clear();
 
     for (MonitorElement* me : torecycle) {
       auto medata = me->release();                        // destroy the ME, get its data.
       medata->data_.key_.id_ = edm::LuminosityBlockID();  // prototype
       // We reuse the ME object here, even if we don't have to. This ensures
       // that when running single-threaded without concurrent lumis/runs,
       // the global MEs will also live forever and allow legacy usages.
       me->switchData(medata);
       // reset here (not later) to still catch random legacy fill calls.
       me->Reset();
       auto result = prototypes.insert(me);
       assert(result.second);  // was new insertion, else findME should succeed
       debugTrackME("cleanupLumi (reset)", nullptr, me);
     }
   }
 
   std::vector<dqm::harvesting::MonitorElement*> IGetter::getContents(std::string const& pathname) const {
     auto lock = std::scoped_lock(store_->booking_mutex_);
     std::vector<MonitorElement*> out;
     MonitorElementData::Path path;
     path.set(pathname, MonitorElementData::Path::Type::DIR);
     for (auto& [runlumi, meset] : store_->globalMEs_) {
       auto it = meset.lower_bound(path);
       while (it != meset.end() && (*it)->getPathname() == path.getDirname()) {
         store_->debugTrackME("getContents (match)", nullptr, *it);
         out.push_back(*it);
         ++it;
       }
     }
     return out;
   }
 
   std::vector<dqm::harvesting::MonitorElement*> IGetter::getAllContents(std::string const& pathname) const {
     auto lock = std::scoped_lock(store_->booking_mutex_);
     std::vector<MonitorElement*> out;
     MonitorElementData::Path path;
     path.set(pathname, MonitorElementData::Path::Type::DIR);
     // make sure this is normalized by getting it from Path object.
     auto path_str = path.getFullname();
     for (auto& [runlumi, meset] : store_->globalMEs_) {
       auto it = meset.lower_bound(path);
       // rfind can be used as a prefix match.
       while (it != meset.end() && (*it)->getPathname().rfind(path_str, 0) == 0) {
         if (runlumi == edm::LuminosityBlockID() && (*it)->getScope() != MonitorElementData::Scope::JOB) {
           // skip prototypes
         } else {
           store_->debugTrackME("getAllContents (match)", nullptr, *it);
           out.push_back(*it);
         }
         ++it;
       }
     }
     return out;
   }
   std::vector<dqm::harvesting::MonitorElement*> IGetter::getAllContents(std::string const& pathname,
                                                                         uint32_t runNumber,
                                                                         uint32_t lumi) const {
     auto lock = std::scoped_lock(store_->booking_mutex_);
     std::vector<MonitorElement*> out;
     MonitorElementData::Path path;
     path.set(pathname, MonitorElementData::Path::Type::DIR);
     // make sure this is normalized by getting it from Path object.
     auto path_str = path.getFullname();
     auto const& meset = store_->globalMEs_[edm::LuminosityBlockID(runNumber, lumi)];
     auto it = meset.lower_bound(path);
 
     // decide if the ME should be save din DQMIO based on the list provided
     bool saveIt = true;
 
     // rfind can be used as a prefix match.
     while (it != meset.end() && (*it)->getFullname().rfind(path_str, 0) == 0) {
       if (store_->doSaveByLumi_ && not store_->MEsToSave_.empty()) {
         for (std::vector<std::string>::const_iterator ipath = store_->MEsToSave_.begin();
              ipath != store_->MEsToSave_.end();
              ++ipath) {
           std::string name = (*it)->getFullname();
           if (name.find(*ipath) != std::string::npos) {
             saveIt = true;
             //std::cout<<name<<" compared to"<<ipath->data()<<std::endl;
             break;
           }
           saveIt = false;
         }
       }
 
       store_->debugTrackME("getAllContents (run/lumi match)", nullptr, *it);
       if (saveIt) {
         out.push_back(*it);
         if (store_->doSaveByLumi_)
           store_->debugTrackME("getAllContents (run/lumi saved)", nullptr, *it);
       }
       ++it;
     }
     return out;
   }
 
   MonitorElement* IGetter::get(std::string const& fullpath) const {
     MonitorElementData::Path path;
     path.set(fullpath, MonitorElementData::Path::Type::DIR_AND_NAME);
     // this only really makes sense if there is only one instance of this ME,
     // but the signature of this method also only makes sense in that case.
     return store_->findME(path);
   }
 
   MonitorElement* IGetter::get(MonitorElementData::Key const& key) const {
     auto const& meset = store_->globalMEs_[key.id_];
     auto it = meset.find(key.path_);
     if (it != meset.end()) {
       assert((*it)->getScope() == key.scope_);
       store_->debugTrackME("get (key found)", nullptr, *it);
       return *it;
     }
     return nullptr;
   }
 
   MonitorElement* IGetter::getElement(std::string const& path) const {
     auto result = this->get(path);
     if (result == nullptr) {
       throw cms::Exception("iGetter Error") << "ME " << path << " was requested but not found.";
     }
     return result;
   }
 
   std::vector<std::string> IGetter::getSubdirs() const {
     // This is terribly inefficient, esp. if this method is then used to
     // recursively enumerate whatever getAllContents would return anyways.
     // But that is fine, any such code should just use getAllContents instead.
     std::set<std::string> subdirs;
     for (auto me : this->getAllContents(this->cwd_)) {
       const auto& name = me->getPathname();
       auto subdirname = name.substr(this->cwd_.length(), std::string::npos);
       auto dirname = subdirname.substr(0, subdirname.find('/'));
       subdirs.insert(dirname);
     }
     std::vector<std::string> out;
     for (const auto& dir : subdirs) {
       if (dir.length() == 0)
         continue;
       out.push_back(this->cwd_ + dir);
     }
     return out;
   }
 
   std::vector<std::string> IGetter::getMEs() const {
     auto mes = this->getContents(this->cwd_);
     std::vector<std::string> out;
     out.reserve(mes.size());
     for (auto me : mes) {
       out.push_back(me->getName());
     }
     return out;
   }
 
   bool IGetter::dirExists(std::string const& path) const {
     // we don't claim this is fast.
     return !this->getAllContents(path).empty();
   }
 
   IGetter::IGetter(DQMStore* store) { store_ = store; }
 
   IGetter::~IGetter() {}
 
   DQMStore::DQMStore(edm::ParameterSet const& pset, edm::ActivityRegistry& ar) : IGetter(this), IBooker(this) {
     verbose_ = pset.getUntrackedParameter<int>("verbose", 0);
     assertLegacySafe_ = pset.getUntrackedParameter<bool>("assertLegacySafe", true);
     doSaveByLumi_ = pset.getUntrackedParameter<bool>("saveByLumi", false);
     MEsToSave_ = pset.getUntrackedParameter<std::vector<std::string>>("MEsToSave", std::vector<std::string>());
     trackME_ = pset.getUntrackedParameter<std::string>("trackME", "");
 
     // Set lumi and run for legacy booking.
     // This is no more than a guess with concurrent runs/lumis, but should be
     // correct for purely sequential legacy stuff.
     // Also reset Scope, such that legacy modules can expect it to be JOB.
     // initLumi and leaveLumi are needed for all module types: these handle
     // creating and deleting global MEs as needed, which has to happen even if
     // a module does not see lumi transitions.
     ar.watchPreGlobalBeginRun([this](edm::GlobalContext const& gc) {
       this->setRunLumi(gc.luminosityBlockID());
       this->initLumi(gc.luminosityBlockID().run(), /* lumi */ 0);
       this->enterLumi(gc.luminosityBlockID().run(), /* lumi */ 0, /* moduleID */ 0);
       this->setScope(MonitorElementData::Scope::JOB);
     });
     ar.watchPreGlobalBeginLumi([this](edm::GlobalContext const& gc) {
       this->setRunLumi(gc.luminosityBlockID());
       this->initLumi(gc.luminosityBlockID().run(), gc.luminosityBlockID().luminosityBlock());
       this->enterLumi(gc.luminosityBlockID().run(), gc.luminosityBlockID().luminosityBlock(), /* moduleID */ 0);
     });
     ar.watchPostGlobalEndRun([this](edm::GlobalContext const& gc) {
       this->leaveLumi(gc.luminosityBlockID().run(), /* lumi */ 0, /* moduleID */ 0);
     });
     ar.watchPostGlobalEndLumi([this](edm::GlobalContext const& gc) {
       this->leaveLumi(gc.luminosityBlockID().run(), gc.luminosityBlockID().luminosityBlock(), /* moduleID */ 0);
     });
 
     // Trigger cleanup after writing. This is needed for all modules; we can
     // only run the cleanup after all output modules have run.
     ar.watchPostGlobalWriteLumi([this](edm::GlobalContext const& gc) {
       this->cleanupLumi(gc.luminosityBlockID().run(), gc.luminosityBlockID().luminosityBlock());
     });
     ar.watchPostGlobalWriteRun(
         [this](edm::GlobalContext const& gc) { this->cleanupLumi(gc.luminosityBlockID().run(), 0); });
 
     // no cleanup at end of job, we don't really need it.
   }
 
   DQMStore::~DQMStore() {}
 
   void DQMStore::save(std::string const& filename, std::string const& path) {
     LegacyIOHelper h(this);
     // no run number passed, will save a flat ROOT file (rather than 'Run xxxxxx/.../Run Summary/...')
     h.save(filename, path);
   }
 
   bool DQMStore::open(std::string const& filename,
                       bool overwrite,
                       std::string const& path,
                       std::string const& prepend,
                       OpenRunDirs stripdirs,
                       bool fileMustExist) {
     assert(!"NIY");
   }
 
 }  // namespace dqm::implementation

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