diff --git a/datamodels/2.x/itop-change-mgmt-itil/datamodel.itop-change-mgmt-itil.xml b/datamodels/2.x/itop-change-mgmt-itil/datamodel.itop-change-mgmt-itil.xml
index 559316f6e2..ecfb88db08 100755
--- a/datamodels/2.x/itop-change-mgmt-itil/datamodel.itop-change-mgmt-itil.xml
+++ b/datamodels/2.x/itop-change-mgmt-itil/datamodel.itop-change-mgmt-itil.xml
@@ -975,18 +975,6 @@
           </state>
         </states>
       </lifecycle>
-      <event_listeners>
-        <listener id="OnChangeInsertRequested">
-          <event>EVENT_SERVICE_DB_INSERT_REQUESTED</event>
-          <callback>OnChangeInsertRequested</callback>
-          <priority>0</priority>
-        </listener>
-        <listener id="OnChangeUpdateRequested">
-          <event>EVENT_SERVICE_DB_UPDATE_REQUESTED</event>
-          <callback>OnChangeUpdateRequested</callback>
-          <priority>0</priority>
-        </listener>
-      </event_listeners>
       <methods>
 				<method id="GetTicketRefFormat">
 					<static>true</static>
@@ -1027,26 +1015,28 @@
 		return true;
 	}]]></code>
         </method>
-        <method id="OnChangeInsertRequested">
+        <method id="OnInsert">
           <static>false</static>
-          <access>public</access>
-          <type>Overload-ExNihilo</type>
+          <access>protected</access>
+          <type>Overload-DBObject</type>
           <code><![CDATA[
-    public function OnChangeInsertRequested(Combodo\iTop\Service\EventData $oEventData)
+    protected function OnInsert()
 	{
+        parent::OnInsert();
         $this->UpdateImpactedItems();
 		$this->SetIfNull('creation_date', time());
 		$this->SetIfNull('last_update', time());
 	}]]>
           </code>
         </method>
-        <method id="OnChangeUpdateRequested">
+        <method id="OnUpdate">
           <static>false</static>
-          <access>public</access>
-          <type>Overload-ExNihilo</type>
+          <access>protected</access>
+          <type>Overload-DBObject</type>
           <code><![CDATA[
-    public function OnChangeUpdateRequested(Combodo\iTop\Service\EventData $oEventData)
+    protected function OnUpdate()
   	{
+        parent::OnUpdate();
         $aChanges = $this->ListChanges();
         if (array_key_exists('functionalcis_list', $aChanges))
         {
diff --git a/datamodels/2.x/itop-change-mgmt/datamodel.itop-change-mgmt.xml b/datamodels/2.x/itop-change-mgmt/datamodel.itop-change-mgmt.xml
index fd595937b9..29d80c634f 100755
--- a/datamodels/2.x/itop-change-mgmt/datamodel.itop-change-mgmt.xml
+++ b/datamodels/2.x/itop-change-mgmt/datamodel.itop-change-mgmt.xml
@@ -512,18 +512,6 @@
                     </state>
                 </states>
             </lifecycle>
-          <event_listeners>
-            <listener id="OnChangeInsertRequested">
-              <event>EVENT_SERVICE_DB_INSERT_REQUESTED</event>
-              <callback>OnChangeInsertRequested</callback>
-              <priority>0</priority>
-            </listener>
-            <listener id="OnChangeUpdateRequested">
-              <event>EVENT_SERVICE_DB_UPDATE_REQUESTED</event>
-              <callback>OnChangeUpdateRequested</callback>
-              <priority>0</priority>
-            </listener>
-          </event_listeners>
             <methods>
 				<method id="GetTicketRefFormat">
 					<static>true</static>
@@ -578,25 +566,27 @@
 		return true;
 	}]]></code>
                 </method>
-                <method id="OnChangeInsertRequested">
+                <method id="OnInsert">
                     <static>false</static>
-                    <access>public</access>
-                    <type>Overload-ExNihilo</type>
+                    <access>protected</access>
+                    <type>Overload-DBObject</type>
                     <code><![CDATA[
-    public function OnChangeInsertRequested(Combodo\iTop\Service\EventData $oEventData)
+    protected function OnInsert()
 	{
+        parent::OnInsert();
         $this->UpdateImpactedItems();
 		$this->SetIfNull('creation_date', time());
 		$this->SetIfNull('last_update', time());
 	}]]></code>
                 </method>
-                <method id="OnChangeUpdateRequested">
+                <method id="OnUpdate">
                     <static>false</static>
-                    <access>public</access>
-                    <type>Overload-ExNihilo</type>
+                    <access>protected</access>
+                    <type>Overload-DBObject</type>
                     <code><![CDATA[
-    public function OnChangeUpdateRequested(Combodo\iTop\Service\EventData $oEventData)
+    protected function OnUpdate()
 	{
+        parent::OnUpdate();
         $aChanges = $this->ListChanges();
         if (array_key_exists('functionalcis_list', $aChanges))
         {
diff --git a/datamodels/2.x/itop-incident-mgmt-itil/datamodel.itop-incident-mgmt-itil.xml b/datamodels/2.x/itop-incident-mgmt-itil/datamodel.itop-incident-mgmt-itil.xml
index 0e79ccc0be..8382cc49fc 100755
--- a/datamodels/2.x/itop-incident-mgmt-itil/datamodel.itop-incident-mgmt-itil.xml
+++ b/datamodels/2.x/itop-incident-mgmt-itil/datamodel.itop-incident-mgmt-itil.xml
@@ -1052,28 +1052,6 @@
 					</state>
 				</states>
 			</lifecycle>
-      <event_listeners>
-        <listener id="OnIncidentInsertRequested">
-          <event>EVENT_SERVICE_DB_INSERT_REQUESTED</event>
-          <callback>OnIncidentInsertRequested</callback>
-          <priority>0</priority>
-        </listener>
-        <listener id="OnIncidentUpdateRequested">
-          <event>EVENT_SERVICE_DB_UPDATE_REQUESTED</event>
-          <callback>OnIncidentUpdateRequested</callback>
-          <priority>0</priority>
-        </listener>
-        <listener id="OnIncidentComputeValues">
-          <event>EVENT_SERVICE_DB_COMPUTE_VALUES</event>
-          <callback>OnIncidentComputeValues</callback>
-          <priority>0</priority>
-        </listener>
-        <listener id="OnIncidentCheckToWrite">
-          <event>EVENT_SERVICE_DB_CHECK_TO_WRITE</event>
-          <callback>OnIncidentCheckToWrite</callback>
-          <priority>0</priority>
-        </listener>
-      </event_listeners>
 			<methods>
 				<method id="GetTicketRefFormat">
 					<static>true</static>
@@ -1144,12 +1122,13 @@
 		return true;
 	}]]></code>
 				</method>
-				<method id="OnIncidentCheckToWrite">
+				<method id="DoCheckToWrite">
 					<static>false</static>
 					<access>public</access>
-					<type>Overload-ExNihilo</type>
-					<code><![CDATA[public function OnIncidentCheckToWrite(Combodo\iTop\Service\EventData $oEventData)
+					<type>Overload-DBObject</type>
+					<code><![CDATA[public function DoCheckToWrite()
   {
+    parent::DoCheckToWrite();
     if (!$this->IsNew() && ($this->Get('parent_incident_id') == $this->GetKey()))
     {
       $this->m_aCheckIssues[] = Dict::Format('Class:Incident/Error:CannotAssignParentIncidentIdToSelf');
@@ -1198,15 +1177,17 @@
 		return $iPriority;
 	}]]></code>
 				</method>
-				<method id="OnIncidentComputeValues">
+				<method id="ComputeValues">
 					<static>false</static>
 					<access>public</access>
-					<type>Overload-ExNihilo</type>
-					<code><![CDATA[	public function OnIncidentComputeValues(Combodo\iTop\Service\EventData $oEventData)
+					<type>Overload-DBObject</type>
+					<code><![CDATA[	public function ComputeValues()
 	{
 
 		// Compute the priority of the ticket
 		$this->Set('priority', $this->ComputePriority());
+
+		return parent::ComputeValues();
 	}]]></code>
 				</method>
 				<method id="DisplayBareRelations">
@@ -1484,24 +1465,26 @@
 		$this->UpdateImpactedItems();
 	}]]></code>
 				</method>
-				<method id="OnIncidentInsertRequested">
+				<method id="OnInsert">
 					<static>false</static>
-					<access>public</access>
-					<type>Overload-ExNihilo</type>
-					<code><![CDATA[	public function OnIncidentInsertRequested(Combodo\iTop\Service\EventData $oEventData)
+					<access>protected</access>
+					<type>Overload-DBObject</type>
+					<code><![CDATA[	protected function OnInsert()
 
 	{
+        parent::OnInsert();
 		$this->ComputeImpactedItems();
 		$this->SetIfNull('last_update', time());
 		$this->SetIfNull('start_date', time());
 	}]]></code>
 				</method>
-				<method id="OnIncidentUpdateRequested">
+				<method id="OnUpdate">
 					<static>false</static>
-					<access>public</access>
-					<type>Overload-ExNihilo</type>
-					<code><![CDATA[	public function OnIncidentUpdateRequested(Combodo\iTop\Service\EventData $oEventData)
+					<access>protected</access>
+					<type>Overload-DBObject</type>
+					<code><![CDATA[	protected function OnUpdate()
 	{
+        parent::OnUpdate();
         $aChanges = $this->ListChanges();
         if (array_key_exists('functionalcis_list', $aChanges))
         {
diff --git a/datamodels/2.x/itop-problem-mgmt/datamodel.itop-problem-mgmt.xml b/datamodels/2.x/itop-problem-mgmt/datamodel.itop-problem-mgmt.xml
index c97b9b6009..7ee74c6f88 100755
--- a/datamodels/2.x/itop-problem-mgmt/datamodel.itop-problem-mgmt.xml
+++ b/datamodels/2.x/itop-problem-mgmt/datamodel.itop-problem-mgmt.xml
@@ -423,23 +423,6 @@
                     </state>
                 </states>
             </lifecycle>
-          <event_listeners>
-            <listener id="OnProblemInsertRequested">
-              <event>EVENT_SERVICE_DB_INSERT_REQUESTED</event>
-              <callback>OnProblemInsertRequested</callback>
-              <priority>0</priority>
-            </listener>
-            <listener id="OnProblemUpdateRequested">
-              <event>EVENT_SERVICE_DB_UPDATE_REQUESTED</event>
-              <callback>OnProblemUpdateRequested</callback>
-              <priority>0</priority>
-            </listener>
-            <listener id="OnProblemComputeValues">
-              <event>EVENT_SERVICE_DB_COMPUTE_VALUES</event>
-              <callback>OnProblemComputeValues</callback>
-              <priority>0</priority>
-            </listener>
-          </event_listeners>
             <methods>
 				<method id="GetTicketRefFormat">
 					<static>true</static>
@@ -537,31 +520,31 @@
 		return $iPriority;
 	}]]></code>
                 </method>
-                <method id="OnProblemComputeValues">
+                <method id="ComputeValues">
                     <static>false</static>
                     <access>public</access>
-                    <type>Overload-ExNihilo</type>
-                    <code><![CDATA[	public function OnProblemComputeValues(Combodo\iTop\Service\EventData $oEventData)
+                    <type>Overload-DBObject</type>
+                    <code><![CDATA[	public function ComputeValues()
 	{
 		// Compute the priority of the ticket
 		$this->Set('priority', $this->ComputePriority());
 	}]]></code>
                 </method>
-                <method id="OnProblemInsertRequested">
+                <method id="OnInsert">
                     <static>false</static>
-                    <access>public</access>
-                    <type>Overload-ExNihilo</type>
-                    <code><![CDATA[	public function OnProblemInsertRequested(Combodo\iTop\Service\EventData $oEventData)
+                    <access>protected</access>
+                    <type>Overload-DBObject</type>
+                    <code><![CDATA[	protected function OnInsert()
 	{
 		$this->SetIfNull('start_date', time());
 		$this->SetIfNull('last_update', time());
 	}]]></code>
                 </method>
-                <method id="OnProblemUpdateRequested">
+                <method id="OnUpdate">
                     <static>false</static>
-                    <access>public</access>
-                    <type>Overload-ExNihilo</type>
-                    <code><![CDATA[	public function OnProblemUpdateRequested(Combodo\iTop\Service\EventData $oEventData)
+                    <access>protected</access>
+                    <type>Overload-DBObject</type>
+                    <code><![CDATA[	protected function OnUpdate()
 	{
 		$this->Set('last_update', time());
 	}]]></code>
diff --git a/datamodels/2.x/itop-request-mgmt-itil/datamodel.itop-request-mgmt-itil.xml b/datamodels/2.x/itop-request-mgmt-itil/datamodel.itop-request-mgmt-itil.xml
index 79138568e6..efd89f7958 100755
--- a/datamodels/2.x/itop-request-mgmt-itil/datamodel.itop-request-mgmt-itil.xml
+++ b/datamodels/2.x/itop-request-mgmt-itil/datamodel.itop-request-mgmt-itil.xml
@@ -1198,28 +1198,6 @@
 					</state>
 				</states>
 			</lifecycle>
-      <event_listeners>
-        <listener id="OnUserRequestInsertRequested">
-          <event>EVENT_SERVICE_DB_INSERT_REQUESTED</event>
-          <callback>OnUserRequestInsertRequested</callback>
-          <priority>0</priority>
-        </listener>
-        <listener id="OnUserRequestUpdateRequested">
-          <event>EVENT_SERVICE_DB_UPDATE_REQUESTED</event>
-          <callback>OnUserRequestUpdateRequested</callback>
-          <priority>0</priority>
-        </listener>
-        <listener id="OnUserRequestComputeValues">
-          <event>EVENT_SERVICE_DB_COMPUTE_VALUES</event>
-          <callback>OnUserRequestComputeValues</callback>
-          <priority>0</priority>
-        </listener>
-        <listener id="OnUserRequestCheckToWrite">
-          <event>EVENT_SERVICE_DB_CHECK_TO_WRITE</event>
-          <callback>OnUserRequestCheckToWrite</callback>
-          <priority>0</priority>
-        </listener>
-      </event_listeners>
       <methods>
 				<method id="GetTicketRefFormat">
 					<static>true</static>
@@ -1304,12 +1282,13 @@
 		return true;
 	}]]></code>
 				</method>
-				<method id="OnUserRequestCheckToWrite">
+				<method id="DoCheckToWrite">
 					<static>false</static>
 					<access>public</access>
-					<type>Overload-ExNihilo</type>
-					<code><![CDATA[public function OnUserRequestCheckToWrite(Combodo\iTop\Service\EventData $oEventData)
+					<type>Overload-DBObject</type>
+					<code><![CDATA[public function DoCheckToWrite()
   {
+    parent::DoCheckToWrite();
     if (!$this->IsNew() && ($this->Get('parent_request_id') == $this->GetKey()))
     {
       $this->m_aCheckIssues[] = Dict::Format('Class:UserRequest/Error:CannotAssignParentRequestIdToSelf');
@@ -1358,14 +1337,16 @@
 		return $iPriority;
 	}]]></code>
 				</method>
-				<method id="OnUserRequestComputeValues">
+				<method id="ComputeValues">
 					<static>false</static>
 					<access>public</access>
-					<type>Overload-ExNihilo</type>
-					<code><![CDATA[	public function OnUserRequestComputeValues(Combodo\iTop\Service\EventData $oEventData)
+					<type>Overload-DBObject</type>
+					<code><![CDATA[	public function ComputeValues()
 	{
 		// Compute the priority of the ticket
 		$this->Set('priority', $this->ComputePriority());
+
+		return parent::ComputeValues();
 	}]]></code>
 				</method>
 				<method id="DisplayBareRelations">
@@ -1555,25 +1536,27 @@
 		$this->UpdateImpactedItems();
 	}]]></code>
 				</method>
-				<method id="OnUserRequestInsertRequested">
+				<method id="OnInsert">
 					<static>false</static>
-					<access>public</access>
-					<type>Overload-ExNihilo</type>
+					<access>protected</access>
+					<type>Overload-DBObject</type>
 					<code><![CDATA[
-    public function OnUserRequestInsertRequested(Combodo\iTop\Service\EventData $oEventData)
+    protected function OnInsert()
 	{
+	  parent::OnInsert();
 		$this->ComputeImpactedItems();
 		$this->SetIfNull('last_update', time());
 		$this->SetIfNull('start_date', time());
 	}]]></code>
 				</method>
-				<method id="OnUserRequestUpdateRequested">
+				<method id="OnUpdate">
 					<static>false</static>
-					<access>public</access>
-					<type>Overload-ExNihilo</type>
+					<access>protected</access>
+					<type>Overload-DBObject</type>
 					<code><![CDATA[
-    public function OnUserRequestUpdateRequested(Combodo\iTop\Service\EventData $oEventData)
+    protected function OnUpdate()
 	{
+        parent::OnUpdate();
         $aChanges = $this->ListChanges();
         if (array_key_exists('functionalcis_list', $aChanges))
         {
diff --git a/datamodels/2.x/itop-request-mgmt/datamodel.itop-request-mgmt.xml b/datamodels/2.x/itop-request-mgmt/datamodel.itop-request-mgmt.xml
index b99a9930d2..fef4e827b1 100755
--- a/datamodels/2.x/itop-request-mgmt/datamodel.itop-request-mgmt.xml
+++ b/datamodels/2.x/itop-request-mgmt/datamodel.itop-request-mgmt.xml
@@ -1231,28 +1231,6 @@
                     </state>
                 </states>
             </lifecycle>
-            <event_listeners>
-              <listener id="OnUserRequestInsertRequested">
-                <event>EVENT_SERVICE_DB_INSERT_REQUESTED</event>
-                <callback>OnUserRequestInsertRequested</callback>
-                <priority>0</priority>
-              </listener>
-              <listener id="OnUserRequestUpdateRequested">
-                <event>EVENT_SERVICE_DB_UPDATE_REQUESTED</event>
-                <callback>OnUserRequestUpdateRequested</callback>
-                <priority>0</priority>
-              </listener>
-              <listener id="OnUserRequestComputeValues">
-                <event>EVENT_SERVICE_DB_COMPUTE_VALUES</event>
-                <callback>OnUserRequestComputeValues</callback>
-                <priority>0</priority>
-              </listener>
-              <listener id="OnUserRequestCheckToWrite">
-                <event>EVENT_SERVICE_DB_CHECK_TO_WRITE</event>
-                <callback>OnUserRequestCheckToWrite</callback>
-                <priority>0</priority>
-              </listener>
-            </event_listeners>
             <methods>
 				<method id="GetTicketRefFormat">
 					<static>true</static>
@@ -1337,12 +1315,13 @@
 		return true;
 	}]]></code>
                 </method>
-                <method id="OnUserRequestCheckToWrite">
+                <method id="DoCheckToWrite">
                     <static>false</static>
                     <access>public</access>
-                    <type>Overload-ExNihilo</type>
-                    <code><![CDATA[public function OnUserRequestCheckToWrite(Combodo\iTop\Service\EventData $oEventData)
+                    <type>Overload-DBObject</type>
+                    <code><![CDATA[public function DoCheckToWrite()
   {
+    parent::DoCheckToWrite();
     if (!$this->IsNew() && ($this->Get('parent_request_id') == $this->GetKey()))
     {
       $this->m_aCheckIssues[] = Dict::Format('Class:UserRequest/Error:CannotAssignParentRequestIdToSelf');
@@ -1392,11 +1371,11 @@
 		return $iPriority;
 	}]]></code>
                 </method>
-                <method id="OnUserRequestComputeValues">
+                <method id="ComputeValues">
                     <static>false</static>
                     <access>public</access>
-                    <type>Overload-ExNihilo</type>
-                    <code><![CDATA[	public function OnUserRequestComputeValues(Combodo\iTop\Service\EventData $oEventData)
+                    <type>Overload-DBObject</type>
+                    <code><![CDATA[	public function ComputeValues()
 	{
 		// Compute the priority of the ticket
 		$this->Set('priority', $this->ComputePriority());
@@ -1412,6 +1391,8 @@
 				$this->Set('request_type', $sType);
 			}
 		}
+
+		return parent::ComputeValues();
 	}]]></code>
                 </method>
                 <method id="DisplayBareRelations">
@@ -1601,26 +1582,28 @@
 		$this->UpdateImpactedItems();
 	}]]></code>
                 </method>
-                <method id="OnUserRequestInsertRequested">
+                <method id="OnInsert">
                     <static>false</static>
-                    <access>public</access>
-                    <type>Overload-ExNihilo</type>
+                    <access>protected</access>
+                    <type>Overload-DBObject</type>
                     <code><![CDATA[
-    public function OnUserRequestInsertRequested(Combodo\iTop\Service\EventData $oEventData)
+    protected function OnInsert()
 	{
+        parent::OnInsert();
 		$this->ComputeImpactedItems();
 
 		$this->SetIfNull('last_update', time());
 		$this->SetIfNull('start_date', time());
 	}]]></code>
                 </method>
-                <method id="OnUserRequestUpdateRequested">
+                <method id="OnUpdate">
                     <static>false</static>
-                    <access>public</access>
-                    <type>Overload-ExNihilo</type>
+                    <access>protected</access>
+                    <type>Overload-DBObject</type>
                     <code><![CDATA[
-   	public function OnUserRequestUpdateRequested(Combodo\iTop\Service\EventData $oEventData)
+   	protected function OnUpdate()
 	{
+        parent::OnUpdate();
         $aChanges = $this->ListChanges();
         if (array_key_exists('functionalcis_list', $aChanges))
         {
diff --git a/datamodels/2.x/itop-service-mgmt-provider/datamodel.itop-service-mgmt-provider.xml b/datamodels/2.x/itop-service-mgmt-provider/datamodel.itop-service-mgmt-provider.xml
index b6e5ae7286..5db8cfe350 100755
--- a/datamodels/2.x/itop-service-mgmt-provider/datamodel.itop-service-mgmt-provider.xml
+++ b/datamodels/2.x/itop-service-mgmt-provider/datamodel.itop-service-mgmt-provider.xml
@@ -1597,20 +1597,15 @@ public function PrefillSearchForm(&$aContextParam)
           <duplicates>true</duplicates>
         </field>
       </fields>
-      <event_listeners>
-        <listener id="OnSLACheckToWrite">
-          <event>EVENT_SERVICE_DB_CHECK_TO_WRITE</event>
-          <callback>OnSLACheckToWrite</callback>
-          <priority>0</priority>
-        </listener>
-      </event_listeners>
       <methods>
-	      <method id="OnSLACheckToWrite">
+	      <method id="DoCheckToWrite">
 		      <static>false</static>
 		      <access>public</access>
 		      <code><![CDATA[
-					public function OnSLACheckToWrite(Combodo\iTop\Service\EventData $oEventData)
+					public function DoCheckToWrite()
 	{
+		parent::DoCheckToWrite();
+
 		$aCustomerContracts = $this->Get("customercontracts_list");
 		foreach ($aCustomerContracts as $sAttCode => $oCustomerContracts)
 		{
diff --git a/datamodels/2.x/itop-tickets/datamodel.itop-tickets.xml b/datamodels/2.x/itop-tickets/datamodel.itop-tickets.xml
index 49d89724d9..fad83db620 100755
--- a/datamodels/2.x/itop-tickets/datamodel.itop-tickets.xml
+++ b/datamodels/2.x/itop-tickets/datamodel.itop-tickets.xml
@@ -216,24 +216,19 @@
 					<count_max>0</count_max>
 				</field>
 			</fields>
-      <event_listeners>
-        <listener id="OnTicketInsertRequested">
-          <event>EVENT_SERVICE_DB_INSERT_REQUESTED</event>
-          <callback>OnTicketInsertRequested</callback>
-          <priority>-10</priority>
-        </listener>
-      </event_listeners>
       <methods>
-				<method id="OnTicketInsertRequested">
+				<method id="DBInsertNoReload">
 					<static>false</static>
 					<access>public</access>
-					<type>Overload-ExNihilo</type>
+					<type>Overload-DBObject</type>
 					<code><![CDATA[
-    public function OnTicketInsertRequested(Combodo\iTop\Service\EventData $oEventData)
+    public function DBInsertNoReload()
     {
           $iNextId = ItopCounter::IncClass(get_class($this));
           $sRef = $this->MakeTicketRef($iNextId);
           $this->SetIfNull('ref', $sRef);
+          $iKey = parent::DBInsertNoReload();
+          return $iKey;
     }
         ]]></code>
 				</method>