Fixed a performance regression caused by the management code.

The current/last-change timestamp is now set on management objects
when they are published, not when they actually change.  Also, the
timestamp is updated only if modifications were made to the object
in the last publish interval.


git-svn-id: https://svn.apache.org/repos/asf/incubator/qpid/trunk/qpid@722120 13f79535-47bb-0310-9956-ffa450edef68

3 files changed, 28 insertions, 23 deletions

diff --git a/cpp/src/qpid/agent/ManagementAgentImpl.cpp b/cpp/src/qpid/agent/ManagementAgentImpl.cpp
index 050f29ac7b..4d5034f137 100644
--- a/cpp/src/qpid/agent/ManagementAgentImpl.cpp
+++ b/cpp/src/qpid/agent/ManagementAgentImpl.cpp
@@ -695,23 +695,20 @@ void ManagementAgentImpl::periodicProcessing()
         cout << "Objects managed: " << managementObjects.size() << endl;
     }
 
-    if (clientWasAdded) {
-        clientWasAdded = false;
-        for (ManagementObjectMap::iterator iter = managementObjects.begin();
-             iter != managementObjects.end();
-             iter++) {
-            ManagementObject* object = iter->second;
-            object->setAllChanged();
-        }
-    }
-
     //
     //  Clear the been-here flag on all objects in the map.
     //
     for (ManagementObjectMap::iterator iter = managementObjects.begin();
          iter != managementObjects.end();
-         iter++)
-        iter->second->setFlags(0);
+         iter++) {
+        ManagementObject* object = iter->second;
+        object->setFlags(0);
+        if (clientWasAdded) {
+            object->setForcePublish(true);
+        }
+    }
+
+    clientWasAdded = false;
 
     //
     //  Process the entire object map.
@@ -727,6 +724,7 @@ void ManagementAgentImpl::periodicProcessing()
         if (baseObject->getFlags() == 1 ||
             (!baseObject->getConfigChanged() &&
              !baseObject->getInstChanged() &&
+             !baseObject->getForcePublish() &&
              !baseObject->isDeleted()))
             continue;
 
@@ -737,19 +735,22 @@ void ManagementAgentImpl::periodicProcessing()
             ManagementObject* object = iter->second;
             if (baseObject->isSameClass(*object) && object->getFlags() == 0) {
                 object->setFlags(1);
+                if (object->getConfigChanged() || object->getInstChanged())
+                    object->setUpdateTime();
 
-                if (object->getConfigChanged() || object->isDeleted()) {
+                if (object->getConfigChanged() || object->getForcePublish() || object->isDeleted()) {
                     encodeHeader(msgBuffer, 'c');
                     object->writeProperties(msgBuffer);
                 }
         
-                if (object->getInstChanged()) {
+                if (object->getInstChanged() || object->getForcePublish()) {
                     encodeHeader(msgBuffer, 'i');
                     object->writeStatistics(msgBuffer);
                 }
 
                 if (object->isDeleted())
                     deleteList.push_back(pair<ObjectId, ManagementObject*>(iter->first, object));
+                object->setForcePublish(false);
 
                 if (msgBuffer.available() < (BUFSIZE / 2))
                     break;
diff --git a/cpp/src/qpid/management/ManagementBroker.cpp b/cpp/src/qpid/management/ManagementBroker.cpp
index e9610ca282..7a092bbb1b 100644
--- a/cpp/src/qpid/management/ManagementBroker.cpp
+++ b/cpp/src/qpid/management/ManagementBroker.cpp
@@ -354,7 +354,7 @@ void ManagementBroker::periodicProcessing (void)
              iter != managementObjects.end ();
              iter++) {
             ManagementObject* object = iter->second;
-            object->setAllChanged ();
+            object->setForcePublish(true);
         }
     }
 
@@ -364,7 +364,10 @@ void ManagementBroker::periodicProcessing (void)
     {
         ManagementObject* object = iter->second;
 
-        if (object->getConfigChanged () || object->isDeleted ())
+        if (object->getConfigChanged() || object->getInstChanged())
+            object->setUpdateTime();
+
+        if (object->getConfigChanged() || object->getForcePublish() || object->isDeleted())
         {
             Buffer msgBuffer (msgChars, BUFSIZE);
             encodeHeader (msgBuffer, 'c');
@@ -376,7 +379,7 @@ void ManagementBroker::periodicProcessing (void)
             sendBuffer (msgBuffer, contentSize, mExchange, routingKey);
         }
         
-        if (object->getInstChanged ())
+        if (object->getInstChanged() || object->getForcePublish())
         {
             Buffer msgBuffer (msgChars, BUFSIZE);
             encodeHeader (msgBuffer, 'i');
@@ -390,6 +393,7 @@ void ManagementBroker::periodicProcessing (void)
 
         if (object->isDeleted())
             deleteList.push_back(pair<ObjectId, ManagementObject*>(iter->first, object));
+        object->setForcePublish(false);
     }
 
     // Delete flagged objects
diff --git a/cpp/src/qpid/management/ManagementObject.h b/cpp/src/qpid/management/ManagementObject.h
index 6f229353e3..e5604eb2e4 100644
--- a/cpp/src/qpid/management/ManagementObject.h
+++ b/cpp/src/qpid/management/ManagementObject.h
@@ -126,6 +126,7 @@ class ManagementObject : public ManagementItem
     uint32_t         flags;
 
     static int nextThreadIndex;
+    bool             forcePublish;
         
     int  getThreadIndex();
     void writeTimestamps (qpid::framing::Buffer& buf);
@@ -136,7 +137,8 @@ class ManagementObject : public ManagementItem
     ManagementObject(ManagementAgent* _agent, Manageable* _core) :
         createTime(uint64_t(qpid::sys::Duration(qpid::sys::now()))),
         destroyTime(0), updateTime(createTime), configChanged(true),
-        instChanged(true), deleted(false), coreObject(_core), agent(_agent) {}
+        instChanged(true), deleted(false),
+        coreObject(_core), agent(_agent), forcePublish(false) {}
     virtual ~ManagementObject() {}
 
     virtual writeSchemaCall_t getWriteSchemaCall (void) = 0;
@@ -156,11 +158,9 @@ class ManagementObject : public ManagementItem
     ObjectId     getObjectId      (void) { return objectId; }
     inline  bool getConfigChanged (void) { return configChanged; }
     virtual bool getInstChanged   (void) { return instChanged; }
-    inline  void setAllChanged    (void) {
-        configChanged = true;
-        instChanged   = true;
-    }
-    inline void setUpdateTime() { updateTime = (uint64_t(sys::Duration(sys::now()))); }
+    inline  void setForcePublish(bool f) { forcePublish = f; }
+    inline  bool getForcePublish() { return forcePublish; }
+    inline  void setUpdateTime() { updateTime = (uint64_t(sys::Duration(sys::now()))); }
 
     inline void resourceDestroy  (void) {
         destroyTime = uint64_t (qpid::sys::Duration (qpid::sys::now ()));