server: prevent vm schedule update failure for time when not changed (apache#11314)

Fixes apache#11175

Behaviour introduced in apache#7397 always validates start-end times during
update even when they are not changed which leads to failure to
enable/disable schedule if the start time has passed.

Signed-off-by: Abhishek Kumar <abhishek.mrt22@gmail.com>

Author: shwstppr

server/src/main/java/org/apache/cloudstack/vm/schedule/VMScheduleManagerImpl.java

@@ -18,20 +18,15 @@
  */
 package org.apache.cloudstack.vm.schedule;
 
-import com.cloud.api.query.MutualExclusiveIdsManagerBase;
-import com.cloud.event.ActionEvent;
-import com.cloud.event.EventTypes;
-import com.cloud.exception.InvalidParameterValueException;
-import com.cloud.user.AccountManager;
-import com.cloud.utils.DateUtil;
-import com.cloud.utils.Pair;
-import com.cloud.utils.component.PluggableService;
-import com.cloud.utils.db.SearchCriteria;
-import com.cloud.utils.db.Transaction;
-import com.cloud.utils.db.TransactionCallback;
-import com.cloud.utils.exception.CloudRuntimeException;
-import com.cloud.vm.UserVmManager;
-import com.cloud.vm.VirtualMachine;
+import java.time.ZonedDateTime;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+import java.util.Objects;
+import java.util.TimeZone;
+
+import javax.inject.Inject;
+
 import org.apache.cloudstack.api.ApiCommandResourceType;
 import org.apache.cloudstack.api.command.user.vm.CreateVMScheduleCmd;
 import org.apache.cloudstack.api.command.user.vm.DeleteVMScheduleCmd;
@@ -42,17 +37,25 @@
 import org.apache.cloudstack.context.CallContext;
 import org.apache.cloudstack.vm.schedule.dao.VMScheduleDao;
 import org.apache.commons.lang.time.DateUtils;
+import org.apache.commons.lang3.ObjectUtils;
 import org.apache.commons.lang3.StringUtils;
 import org.apache.log4j.Logger;
 import org.springframework.scheduling.support.CronExpression;
 
-import javax.inject.Inject;
-import java.time.ZonedDateTime;
-import java.util.ArrayList;
-import java.util.Date;
-import java.util.List;
-import java.util.Objects;
-import java.util.TimeZone;
+import com.cloud.api.query.MutualExclusiveIdsManagerBase;
+import com.cloud.event.ActionEvent;
+import com.cloud.event.EventTypes;
+import com.cloud.exception.InvalidParameterValueException;
+import com.cloud.user.AccountManager;
+import com.cloud.utils.DateUtil;
+import com.cloud.utils.Pair;
+import com.cloud.utils.component.PluggableService;
+import com.cloud.utils.db.SearchCriteria;
+import com.cloud.utils.db.Transaction;
+import com.cloud.utils.db.TransactionCallback;
+import com.cloud.utils.exception.CloudRuntimeException;
+import com.cloud.vm.UserVmManager;
+import com.cloud.vm.VirtualMachine;
 
 public class VMScheduleManagerImpl extends MutualExclusiveIdsManagerBase implements VMScheduleManager, PluggableService {
 
@@ -208,6 +211,9 @@ public VMScheduleResponse updateSchedule(UpdateVMScheduleCmd cmd) {
         Date cmdStartDate = cmd.getStartDate();
         Date cmdEndDate = cmd.getEndDate();
         Boolean enabled = cmd.getEnabled();
+        final String originalTimeZone = vmSchedule.getTimeZone();
+        final Date originalStartDate = vmSchedule.getStartDate();
+        final Date originalEndDate = vmSchedule.getEndDate();
 
         TimeZone timeZone;
         String timeZoneId;
@@ -234,7 +240,13 @@ public VMScheduleResponse updateSchedule(UpdateVMScheduleCmd cmd) {
             startDate = Date.from(DateUtil.getZoneDateTime(cmdStartDate, timeZone.toZoneId()).toInstant());
         }
 
-        validateStartDateEndDate(Objects.requireNonNullElse(startDate, DateUtils.addMinutes(new Date(), 1)), endDate, timeZone);
+        if (ObjectUtils.anyNotNull(cmdStartDate, cmdEndDate, cmdTimeZone) &&
+                (!Objects.equals(originalTimeZone, timeZoneId) ||
+                        !Objects.equals(originalStartDate, startDate) ||
+                        !Objects.equals(originalEndDate, endDate))) {
+            validateStartDateEndDate(Objects.requireNonNullElse(startDate, DateUtils.addMinutes(new Date(), 1)),
+                    endDate, timeZone);
+        }
 
         if (enabled != null) {
             vmSchedule.setEnabled(enabled);