Added new function Scheduler::getQueuesAndMountSummaries() in order to implement showqueues.

Fixed a typo in a variable name.

common/CMakeLists.txt

@@ -48,6 +48,7 @@ set (COMMON_LIB_SRC_FILES
   dataStructures/LogicalLibrary.cpp
   dataStructures/MountType.cpp
   dataStructures/MountPolicy.cpp
+  dataStructures/QueueAndMountSummary.cpp
   dataStructures/ReadTestResult.cpp
   dataStructures/RepackInfo.cpp
   dataStructures/RepackType.cpp

common/dataStructures/DriveState.cpp

@@ -29,8 +29,8 @@ namespace dataStructures {
 //------------------------------------------------------------------------------
 DriveState::DriveState():
   sessionId(0),
-  bytesTransferedInSession(0),
-  filesTransferedInSession(0),
+  bytesTransferredInSession(0),
+  filesTransferredInSession(0),
   latestBandwidth(0),
   sessionStartTime(0),
   mountStartTime(0),
@@ -55,8 +55,8 @@ bool DriveState::operator==(const DriveState &rhs) const {
       && host==rhs.host
       && logicalLibrary==rhs.logicalLibrary
       && sessionId==rhs.sessionId
-      && bytesTransferedInSession==rhs.bytesTransferedInSession
-      && filesTransferedInSession==rhs.filesTransferedInSession
+      && bytesTransferredInSession==rhs.bytesTransferredInSession
+      && filesTransferredInSession==rhs.filesTransferredInSession
       && latestBandwidth==rhs.latestBandwidth
       && sessionStartTime==rhs.sessionStartTime
       && mountStartTime==rhs.mountStartTime
@@ -94,8 +94,8 @@ std::ostream &operator<<(std::ostream &os, const DriveState &obj) {
      << " host=" << obj.host
      << " logicalLibrary=" << obj.logicalLibrary
      << " sessionId=" << obj.sessionId
-     << " bytesTransferedInSession=" << obj.bytesTransferedInSession
-     << " filesTransferedInSession=" << obj.filesTransferedInSession
+     << " bytesTransferedInSession=" << obj.bytesTransferredInSession
+     << " filesTransferedInSession=" << obj.filesTransferredInSession
      << " latestBandwidth=" << obj.latestBandwidth
      << " sessionStartTime=" << obj.sessionStartTime
      << " mountStartTime="  << obj.mountStartTime

common/dataStructures/DriveState.hpp

@@ -45,8 +45,8 @@ struct DriveState {
   std::string host;
   std::string logicalLibrary;
   uint64_t sessionId;
-  uint64_t bytesTransferedInSession;
-  uint64_t filesTransferedInSession;
+  uint64_t bytesTransferredInSession;
+  uint64_t filesTransferredInSession;
   double latestBandwidth; /** < Byte per seconds */
   time_t sessionStartTime;
   time_t mountStartTime;

common/dataStructures/QueueAndMountSummary.cpp

+/*
+ * The CERN Tape Archive(CTA) project
+ * Copyright(C) 2015  CERN
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ *(at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "QueueAndMountSummary.hpp"
+#include "common/exception/Exception.hpp"
+
+#include <set>
+
+namespace cta {
+namespace common {
+namespace dataStructures {
+
+QueueAndMountSummary& QueueAndMountSummary::getOrCreateEntry(std::list<QueueAndMountSummary> summaryList, MountType mountType, const std::string& tapePool, const std::string vid) {
+  for (auto & summary: summaryList) {
+    if ((mountType==MountType::Archive && summary.tapePool==tapePool) ||
+        (mountType==MountType::Retrieve && summary.vid==vid))
+      return summary;
+  }
+  if (std::set<MountType>({MountType::Archive, MountType::Retrieve}).count(mountType)) {
+    summaryList.push_back(QueueAndMountSummary());
+    summaryList.back().mountType=mountType;
+    summaryList.back().tapePool=tapePool;
+    if (MountType::Archive==mountType) {
+      summaryList.back().vid="-";
+    } else {
+      summaryList.back().vid=vid;
+    }
+    return summaryList.back();
+  }
+  throw cta::exception::Exception ("In QueueAndMountSummary::getOrCreateEntry(): Unexpected mount type.");
+}
+
+
+}}} //namespace cta::common::dataStructures
\ No newline at end of file

common/dataStructures/QueueAndMountSummary.hpp

+/*
+ * The CERN Tape Archive(CTA) project
+ * Copyright(C) 2015  CERN
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ *(at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "MountType.hpp"
+#include "MountPolicy.hpp"
+
+#include <string>
+#include <list>
+
+namespace cta {
+namespace common {
+namespace dataStructures {
+
+/** This structure holds all the information regarding a VID (retrieves) */
+struct QueueAndMountSummary {
+  MountType mountType=MountType::NoMount;
+  std::string tapePool;
+  std::string vid;
+  uint64_t filesQueued=0;
+  uint64_t bytesQueued=0;
+  MountPolicy mountPolicy;
+  uint64_t currentMounts=0;
+  uint64_t currentFiles=0;
+  uint64_t currentBytes=0;
+  double latestBandwidth=0;
+  uint64_t nextMounts=0;
+  uint64_t tapesCapacity=0;
+  uint64_t dataOnTapes=0;
+  uint64_t fullTapes=0;
+  uint64_t emptyTapes=0;
+  uint64_t disabledTapes=0;
+  uint64_t writableTapes=0;
+  
+  static QueueAndMountSummary & getOrCreateEntry(std::list<QueueAndMountSummary> summaryList, MountType mountType, const std::string & tapePool, const std::string vid);
+};
+
+}}} //namespace cta::common::dataStructures
\ No newline at end of file

objectstore/DriveRegister.cpp

@@ -113,8 +113,8 @@ std::list<cta::common::dataStructures::DriveState> DriveRegister::getAllDrivesSt
     ret.back().host                        = d.host();
     ret.back().logicalLibrary              = d.logicallibrary();
     ret.back().sessionId                   = d.sessionid();
-    ret.back().bytesTransferedInSession    = d.bytestransferedinsession();
-    ret.back().filesTransferedInSession    = d.filestransferedinsession();
+    ret.back().bytesTransferredInSession    = d.bytestransferedinsession();
+    ret.back().filesTransferredInSession    = d.filestransferedinsession();
     ret.back().latestBandwidth             = d.latestbandwidth();
     ret.back().sessionStartTime            = d.sessionstarttime();
     ret.back().mountStartTime              = d.mountstarttime();
@@ -153,8 +153,8 @@ cta::common::dataStructures::DriveState DriveRegister::getDriveState(const std::
       ret.host                        = d.host();
       ret.logicalLibrary              = d.logicallibrary();
       ret.sessionId                   = d.sessionid();
-      ret.bytesTransferedInSession    = d.bytestransferedinsession();
-      ret.filesTransferedInSession    = d.filestransferedinsession();
+      ret.bytesTransferredInSession    = d.bytestransferedinsession();
+      ret.filesTransferredInSession    = d.filestransferedinsession();
       ret.latestBandwidth             = d.latestbandwidth();
       ret.sessionStartTime            = d.sessionstarttime();
       ret.mountStartTime              = d.mountstarttime();
@@ -199,8 +199,8 @@ update:
   ds->set_host(driveState.host);
   ds->set_logicallibrary(driveState.logicalLibrary);
   ds->set_sessionid(driveState.sessionId);
-  ds->set_bytestransferedinsession(driveState.bytesTransferedInSession);
-  ds->set_filestransferedinsession(driveState.filesTransferedInSession);
+  ds->set_bytestransferedinsession(driveState.bytesTransferredInSession);
+  ds->set_filestransferedinsession(driveState.filesTransferredInSession);
   ds->set_latestbandwidth(driveState.latestBandwidth);
   ds->set_sessionstarttime(driveState.sessionStartTime);
   ds->set_mountstarttime(driveState.mountStartTime);

scheduler/OStoreDB/OStoreDB.cpp

@@ -81,25 +81,9 @@ void OStoreDB::ping() {
 }
 
 //------------------------------------------------------------------------------
-// OStoreDB::getMountInfo()
+// OStoreDB::fetchMountInfo()
 //------------------------------------------------------------------------------
-std::unique_ptr<SchedulerDatabase::TapeMountDecisionInfo> 
-  OStoreDB::getMountInfo() {
-  //Allocate the getMountInfostructure to return.
-  assertAgentAddressSet();
-  std::unique_ptr<OStoreDB::TapeMountDecisionInfo> privateRet (new OStoreDB::TapeMountDecisionInfo(
-    m_objectStore, *m_agentReference));
-  TapeMountDecisionInfo & tmdi=*privateRet;
-  // Get all the tape pools and tapes with queues (potential mounts)
-  objectstore::RootEntry re(m_objectStore);
-  objectstore::ScopedSharedLock rel(re);
-  re.fetch();
-  // Take an exclusive lock on the scheduling and fetch it.
-  tmdi.m_schedulerGlobalLock.reset(
-    new SchedulerGlobalLock(re.getSchedulerGlobalLock(), m_objectStore));
-  tmdi.m_lockOnSchedulerGlobalLock.lock(*tmdi.m_schedulerGlobalLock);
-  tmdi.m_lockTaken = true;
-  tmdi.m_schedulerGlobalLock->fetch();
+void OStoreDB::fetchMountInfo(SchedulerDatabase::TapeMountDecisionInfo& tmdi, RootEntry& re) {
   // Walk the archive queues for statistics
   for (auto & aqp: re.dumpArchiveQueues()) {
     objectstore::ArchiveQueue aqueue(aqp.address, m_objectStore);
@@ -147,7 +131,7 @@ std::unique_ptr<SchedulerDatabase::TapeMountDecisionInfo>
     }
   }
   // Collect information about the existing and next mounts
-  // If a next mount exists it "counts double", but the corresponding drive
+  // If a next mount exists the drive "counts double", but the corresponding drive
   // is either about to mount, or about to replace its current mount.
   objectstore::DriveRegister dr(re.getDriveRegisterAddress(), m_objectStore);
   objectstore::ScopedSharedLock drl(dr);
@@ -172,6 +156,10 @@ std::unique_ptr<SchedulerDatabase::TapeMountDecisionInfo>
       tmdi.existingOrNextMounts.back().tapePool = d->currentTapePool;
       tmdi.existingOrNextMounts.back().driveName = d->driveName;
       tmdi.existingOrNextMounts.back().vid = d->currentVid;
+      tmdi.existingOrNextMounts.back().currentMount = true;
+      tmdi.existingOrNextMounts.back().bytesTransferred = d->bytesTransferredInSession;
+      tmdi.existingOrNextMounts.back().filesTransferred = d->filesTransferredInSession;
+      tmdi.existingOrNextMounts.back().latestBandwidth = d->latestBandwidth;
     }
     if (activeMountTypes.count((int)d->nextMountType)) {
       tmdi.existingOrNextMounts.push_back(ExistingMount());
@@ -179,11 +167,76 @@ std::unique_ptr<SchedulerDatabase::TapeMountDecisionInfo>
       tmdi.existingOrNextMounts.back().tapePool = d->nextTapepool;
       tmdi.existingOrNextMounts.back().driveName = d->driveName;
       tmdi.existingOrNextMounts.back().vid = d->nextVid;
+      tmdi.existingOrNextMounts.back().currentMount = false;
+      tmdi.existingOrNextMounts.back().bytesTransferred = 0;
+      tmdi.existingOrNextMounts.back().filesTransferred = 0;
+      tmdi.existingOrNextMounts.back().latestBandwidth = 0;
     }
   }
+}
+
+//------------------------------------------------------------------------------
+// OStoreDB::getMountInfo()
+//------------------------------------------------------------------------------
+std::unique_ptr<SchedulerDatabase::TapeMountDecisionInfo> 
+  OStoreDB::getMountInfo() {
+  //Allocate the getMountInfostructure to return.
+  assertAgentAddressSet();
+  std::unique_ptr<OStoreDB::TapeMountDecisionInfo> privateRet (new OStoreDB::TapeMountDecisionInfo(
+    m_objectStore, *m_agentReference));
+  TapeMountDecisionInfo & tmdi=*privateRet;
+  // Get all the tape pools and tapes with queues (potential mounts)
+  objectstore::RootEntry re(m_objectStore);
+  objectstore::ScopedSharedLock rel(re);
+  re.fetch();
+  // Take an exclusive lock on the scheduling and fetch it.
+  tmdi.m_schedulerGlobalLock.reset(
+    new SchedulerGlobalLock(re.getSchedulerGlobalLock(), m_objectStore));
+  tmdi.m_lockOnSchedulerGlobalLock.lock(*tmdi.m_schedulerGlobalLock);
+  tmdi.m_lockTaken = true;
+  tmdi.m_schedulerGlobalLock->fetch();
+  fetchMountInfo(tmdi, re);
+  std::unique_ptr<SchedulerDatabase::TapeMountDecisionInfo> ret(std::move(privateRet));
+  return ret;
+}
+
+//------------------------------------------------------------------------------
+// OStoreDB::getMountInfoNoLock()
+//------------------------------------------------------------------------------
+std::unique_ptr<SchedulerDatabase::TapeMountDecisionInfo> OStoreDB::getMountInfoNoLock() {
+  //Allocate the getMountInfostructure to return.
+  assertAgentAddressSet();
+  std::unique_ptr<OStoreDB::TapeMountDecisionInfoNoLock> privateRet (new OStoreDB::TapeMountDecisionInfoNoLock);
+  // Get all the tape pools and tapes with queues (potential mounts)
+  objectstore::RootEntry re(m_objectStore);
+  objectstore::ScopedSharedLock rel(re);
+  re.fetch();
+  TapeMountDecisionInfoNoLock & tmdi=*privateRet;
+  fetchMountInfo(tmdi, re);
   std::unique_ptr<SchedulerDatabase::TapeMountDecisionInfo> ret(std::move(privateRet));
   return ret;
 }
+
+//------------------------------------------------------------------------------
+// OStoreDB::TapeMountDecisionInfoNoLock::createArchiveMount()
+//------------------------------------------------------------------------------
+std::unique_ptr<SchedulerDatabase::ArchiveMount> OStoreDB::TapeMountDecisionInfoNoLock::createArchiveMount(const catalogue::TapeForWriting& tape, const std::string driveName, const std::string& logicalLibrary, const std::string& hostName, time_t startTime) {
+  throw cta::exception::Exception("In OStoreDB::TapeMountDecisionInfoNoLock::createArchiveMount(): This function should not be called");
+}
+
+//------------------------------------------------------------------------------
+// OStoreDB::TapeMountDecisionInfoNoLock::createRetrieveMount()
+//------------------------------------------------------------------------------
+std::unique_ptr<SchedulerDatabase::RetrieveMount> OStoreDB::TapeMountDecisionInfoNoLock::createRetrieveMount(const std::string& vid, const std::string& tapePool, const std::string driveName, const std::string& logicalLibrary, const std::string& hostName, time_t startTime) {
+  throw cta::exception::Exception("In OStoreDB::TapeMountDecisionInfoNoLock::createRetrieveMount(): This function should not be called");
+}
+
+//------------------------------------------------------------------------------
+// OStoreDB::TapeMountDecisionInfoNoLock::~TapeMountDecisionInfoNoLock()
+//------------------------------------------------------------------------------
+OStoreDB::TapeMountDecisionInfoNoLock::~TapeMountDecisionInfoNoLock() {}
+
+
 /* Old getMountInfo
 //------------------------------------------------------------------------------
 // OStoreDB::getMountInfo()
@@ -960,8 +1013,8 @@ void OStoreDB::updateDriveStatusInRegitry(objectstore::DriveRegister& dr,
     driveState.mountType = common::dataStructures::MountType::NoMount;
     driveState.driveStatus = common::dataStructures::DriveStatus::Unknown;
     driveState.sessionId = 0;
-    driveState.bytesTransferedInSession = 0;
-    driveState.filesTransferedInSession = 0;
+    driveState.bytesTransferredInSession = 0;
+    driveState.filesTransferredInSession = 0;
     driveState.latestBandwidth = 0;
     driveState.sessionStartTime = 0;
     driveState.mountStartTime = 0;
@@ -1030,8 +1083,8 @@ void OStoreDB::setDriveDown(common::dataStructures::DriveState & driveState,
   }
   // If we are changing state, then all should be reset.
   driveState.sessionId=0;
-  driveState.bytesTransferedInSession=0;
-  driveState.filesTransferedInSession=0;
+  driveState.bytesTransferredInSession=0;
+  driveState.filesTransferredInSession=0;
   driveState.latestBandwidth=0;
   driveState.sessionStartTime=0;
   driveState.mountStartTime=0;
@@ -1068,8 +1121,8 @@ void OStoreDB::setDriveUpOrMaybeDown(common::dataStructures::DriveState & driveS
   }
   // If we are changing state, then all should be reset.
   driveState.sessionId=0;
-  driveState.bytesTransferedInSession=0;
-  driveState.filesTransferedInSession=0;
+  driveState.bytesTransferredInSession=0;
+  driveState.filesTransferredInSession=0;
   driveState.latestBandwidth=0;
   driveState.sessionStartTime=0;
   driveState.mountStartTime=0;
@@ -1099,8 +1152,8 @@ void OStoreDB::setDriveStarting(common::dataStructures::DriveState & driveState,
   // If we are changing state, then all should be reset. We are not supposed to
   // know the direction yet.
   driveState.sessionId=inputs.mountSessionId;
-  driveState.bytesTransferedInSession=0;
-  driveState.filesTransferedInSession=0;
+  driveState.bytesTransferredInSession=0;
+  driveState.filesTransferredInSession=0;
   driveState.latestBandwidth=0;
   driveState.sessionStartTime=inputs.reportTime;
   driveState.mountStartTime=0;
@@ -1130,8 +1183,8 @@ void OStoreDB::setDriveMounting(common::dataStructures::DriveState & driveState,
   // If we are changing state, then all should be reset. We are not supposed to
   // know the direction yet.
   driveState.sessionId=inputs.mountSessionId;
-  driveState.bytesTransferedInSession=0;
-  driveState.filesTransferedInSession=0;
+  driveState.bytesTransferredInSession=0;
+  driveState.filesTransferredInSession=0;
   driveState.latestBandwidth=0;
   //driveState.sessionstarttime=inputs.reportTime;
   driveState.mountStartTime=inputs.reportTime;
@@ -1156,14 +1209,14 @@ void OStoreDB::setDriveTransfering(common::dataStructures::DriveState & driveSta
   // If we were already transferring, we update the full statistics
   if (driveState.driveStatus == common::dataStructures::DriveStatus::Transfering) {
     driveState.lastUpdateTime=inputs.reportTime;
-    driveState.bytesTransferedInSession=inputs.byteTransfered;
-    driveState.filesTransferedInSession=inputs.filesTransfered;
+    driveState.bytesTransferredInSession=inputs.byteTransfered;
+    driveState.filesTransferredInSession=inputs.filesTransfered;
     driveState.latestBandwidth=inputs.latestBandwidth;
     return;
   }
   driveState.sessionId=inputs.mountSessionId;
-  driveState.bytesTransferedInSession=inputs.byteTransfered;
-  driveState.filesTransferedInSession=inputs.filesTransfered;
+  driveState.bytesTransferredInSession=inputs.byteTransfered;
+  driveState.filesTransferredInSession=inputs.filesTransfered;
   driveState.latestBandwidth=inputs.latestBandwidth;
   //driveState.sessionstarttime=inputs.reportTime;
   //driveState.mountstarttime=inputs.reportTime;
@@ -1192,8 +1245,8 @@ void OStoreDB::setDriveUnloading(common::dataStructures::DriveState & driveState
   // If we are changing state, then all should be reset. We are not supposed to
   // know the direction yet.
   driveState.sessionId=inputs.mountSessionId;
-  driveState.bytesTransferedInSession=0;
-  driveState.filesTransferedInSession=0;
+  driveState.bytesTransferredInSession=0;
+  driveState.filesTransferredInSession=0;
   driveState.latestBandwidth=0;
   driveState.sessionStartTime=0;
   driveState.mountStartTime=0;
@@ -1222,8 +1275,8 @@ void OStoreDB::setDriveUnmounting(common::dataStructures::DriveState & driveStat
   // If we are changing state, then all should be reset. We are not supposed to
   // know the direction yet.
   driveState.sessionId=inputs.mountSessionId;
-  driveState.bytesTransferedInSession=0;
-  driveState.filesTransferedInSession=0;
+  driveState.bytesTransferredInSession=0;
+  driveState.filesTransferredInSession=0;
   driveState.latestBandwidth=0;
   driveState.sessionStartTime=0;
   driveState.mountStartTime=0;
@@ -1252,8 +1305,8 @@ void OStoreDB::setDriveDrainingToDisk(common::dataStructures::DriveState & drive
   // If we are changing state, then all should be reset. We are not supposed to
   // know the direction yet.
   driveState.sessionId=inputs.mountSessionId;
-  driveState.bytesTransferedInSession=0;
-  driveState.filesTransferedInSession=0;
+  driveState.bytesTransferredInSession=0;
+  driveState.filesTransferredInSession=0;
   driveState.latestBandwidth=0;
   driveState.sessionStartTime=0;
   driveState.mountStartTime=0;
@@ -1282,8 +1335,8 @@ void OStoreDB::setDriveCleaningUp(common::dataStructures::DriveState & driveStat
   // If we are changing state, then all should be reset. We are not supposed to
   // know the direction yet.
   driveState.sessionId=inputs.mountSessionId;
-  driveState.bytesTransferedInSession=0;
-  driveState.filesTransferedInSession=0;
+  driveState.bytesTransferredInSession=0;
+  driveState.filesTransferredInSession=0;
   driveState.latestBandwidth=0;
   driveState.sessionStartTime=0;
   driveState.mountStartTime=0;

scheduler/OStoreDB/OStoreDB.hpp

@@ -33,6 +33,7 @@ namespace cta {
 namespace objectstore {
   class Backend;
   class Agent;
+  class RootEntry;
 }
 
 namespace ostoredb {
@@ -81,9 +82,32 @@ public:
     objectstore::Backend & m_objectStore;
     objectstore::AgentReference & m_agentReference;
   };
+  
+  class TapeMountDecisionInfoNoLock: public SchedulerDatabase::TapeMountDecisionInfo {
+  public:
+    std::unique_ptr<SchedulerDatabase::ArchiveMount> createArchiveMount(
+      const catalogue::TapeForWriting & tape,
+      const std::string driveName, const std::string& logicalLibrary, 
+      const std::string & hostName, time_t startTime) override;
+    std::unique_ptr<SchedulerDatabase::RetrieveMount> createRetrieveMount(
+      const std::string & vid, const std::string & tapePool,
+      const std::string driveName,
+      const std::string& logicalLibrary, const std::string& hostName, 
+      time_t startTime) override;
+    virtual ~TapeMountDecisionInfoNoLock();
+  };
 
+private:
+  /**
+   * An internal helper function with commonalities of both following functions
+   * @param tmdi The TapeMountDecisionInfo where to store the data.
+   * @param re A RootEntry object that should be locked and fetched.
+   */
+  void fetchMountInfo(SchedulerDatabase::TapeMountDecisionInfo &tmdi, objectstore::RootEntry &re);
+public:
   std::unique_ptr<SchedulerDatabase::TapeMountDecisionInfo> getMountInfo() override;
-  
+  std::unique_ptr<SchedulerDatabase::TapeMountDecisionInfo> getMountInfoNoLock() override;
+
   /* === Archive Mount handling ============================================= */
   class ArchiveMount: public SchedulerDatabase::ArchiveMount {
     friend class TapeMountDecisionInfo;

scheduler/OStoreDB/OStoreDBFactory.hpp

@@ -127,7 +127,11 @@ public:
   std::unique_ptr<TapeMountDecisionInfo> getMountInfo() override {
     return m_OStoreDB.getMountInfo();
   }
-  
+
+  std::unique_ptr<TapeMountDecisionInfo> getMountInfoNoLock() override {
+    return m_OStoreDB.getMountInfoNoLock();
+  }
+
   std::list<RetrieveQueueStatistics> getRetrieveQueueStatistics(const cta::common::dataStructures::RetrieveFileQueueCriteria& criteria,
           const std::set<std::string> & vidsToConsider) override {
     return m_OStoreDB.getRetrieveQueueStatistics(criteria, vidsToConsider);

scheduler/Scheduler.cpp

@@ -658,4 +658,69 @@ std::unique_ptr<TapeMount> Scheduler::getNextMount(const std::string &logicalLib
   return std::unique_ptr<TapeMount>();
 }
 
+std::list<common::dataStructures::QueueAndMountSummary> Scheduler::getQueuesAndMountSummaries(log::LogContext& lc) {
+  std::list<common::dataStructures::QueueAndMountSummary> ret;
+  // Extract relevant information from the object store.
+  auto mountDecisionInfo=m_db.getMountInfoNoLock();
+  for (auto & pm: mountDecisionInfo->potentialMounts) {
+    // Find or create the relevant entry.
+    auto & summary  = common::dataStructures::QueueAndMountSummary::getOrCreateEntry(ret, pm.type, pm.tapePool, pm.vid);
+    switch (pm.type) {
+    case common::dataStructures::MountType::Archive:
+      summary.mountPolicy.archivePriority = pm.priority;
+      summary.mountPolicy.archiveMinRequestAge = pm.minArchiveRequestAge;
+      summary.mountPolicy.maxDrivesAllowed = pm.maxDrivesAllowed;
+      summary.bytesQueued = pm.bytesQueued;
+      summary.filesQueued = pm.filesQueued;
+      break;
+    case common::dataStructures::MountType::Retrieve:
+      // TODO: we should remove the retrieveMinRequestAge if it's redundant, or rename pm.minArchiveRequestAge.
+      summary.mountPolicy.retrieveMinRequestAge = pm.minArchiveRequestAge;
+      summary.mountPolicy.retrievePriority = pm.priority;
+      summary.mountPolicy.maxDrivesAllowed = pm.maxDrivesAllowed;
+      summary.bytesQueued = pm.bytesQueued;
+      summary.filesQueued = pm.filesQueued;
+      break;
+    default:
+      break;
+    }
+  }
+  for (auto & em: mountDecisionInfo->existingOrNextMounts) {
+    auto & summary = common::dataStructures::QueueAndMountSummary::getOrCreateEntry(ret, em.type, em.tapePool, em.vid);
+    switch (em.type) {
+    case common::dataStructures::MountType::Archive:
+    case common::dataStructures::MountType::Retrieve:
+      if (em.currentMount) 
+        summary.currentMounts++;
+      else
+        summary.nextMounts++;
+      summary.currentBytes += em.bytesTransferred;
+      summary.currentFiles += em.filesTransferred;
+      summary.latestBandwidth += em.latestBandwidth;
+      break;
+    default:
+      break;
+    }
+  }
+  mountDecisionInfo.reset();
+  // Add the tape information where useful (archive queues).
+  for (auto & tp: ret) {
+    if (common::dataStructures::MountType::Archive==tp.mountType) {
+      // Get all the tape for this pool
+      cta::catalogue::TapeSearchCriteria tsc;
+      tsc.tapePool = tp.tapePool;
+      auto tapes=m_catalogue.getTapes(tsc);
+      for (auto & t:tapes) {
+        tp.tapesCapacity += t.capacityInBytes;
+        tp.dataOnTapes += t.dataOnTapeInBytes;
+        if (t.disabled) tp.disabledTapes++;
+        if (t.full) tp.fullTapes++;
+        if (!t.full && t.disabled) tp.writableTapes++;
+      }
+    }
+  }
+  return ret;
+}
+
+
 } // namespace cta

scheduler/Scheduler.hpp

@@ -40,6 +40,7 @@
 #include "common/dataStructures/UpdateFileStorageClassRequest.hpp"
 #include "common/dataStructures/VerifyInfo.hpp"
 #include "common/dataStructures/WriteTestResult.hpp"
+#include "common/dataStructures/QueueAndMountSummary.hpp"
 
 #include "common/exception/Exception.hpp"
 #include "common/log/LogContext.hpp"
@@ -237,8 +238,21 @@ public:
   std::list<cta::common::dataStructures::DriveState> getDriveStates(
     const cta::common::dataStructures::SecurityIdentity &cliIdentity) const;
 
-  /*============== Actual mount scheduling ===================================*/
+  /*============== Actual mount scheduling and queue status reporting ========*/
+  /**
+   * Actually decide which mount to do next for a given drive.
+   * @param logicalLibraryName library for the drive we are scheduling
+   * @param driveName name of the drive we are scheduling
+   * @param lc log context
+   * @return unique pointer to the tape mount structure. Next step for the user will be find which type of mount this is.
+   */
   std::unique_ptr<TapeMount> getNextMount(const std::string &logicalLibraryName, const std::string &driveName, log::LogContext & lc);
+  /**
+   * A function returning 
+   * @param lc
+   * @return 
+   */
+  std::list<common::dataStructures::QueueAndMountSummary> getQueuesAndMountSummaries(log::LogContext & lc);
   
   /*============== Administrator management ==================================*/
   void authorizeAdmin(const cta::common::dataStructures::SecurityIdentity &cliIdentity);

scheduler/SchedulerDatabase.hpp

@@ -401,6 +401,10 @@ public:
     cta::common::dataStructures::MountType type;
     std::string tapePool;
     std::string vid;
+    bool currentMount; ///< True if the mount is current (othermise, it's a next mount).
+    uint64_t bytesTransferred;
+    uint64_t filesTransferred;
+    double latestBandwidth;
   };