add a default value for [-AutoPauseDelayInMinute] parameter of command [New-AzSynapseSparkpool] and [Update-AzSynapseSparkpool] (#16650)

* add a default value [15] for [-AutoPauseDelayInMinute] parameter of command [New-AzSynapseSparkpool] and [Update-AzSynapseSparkpool]

* use a formatted string for help message

* Update ChangeLog.md

Polish changelog.md

Co-authored-by: Jin Lei <54836179+msJinLei@users.noreply.github.com>

Author: yanjungao718

src/Synapse/Synapse/ChangeLog.md

@@ -19,6 +19,7 @@
 -->
 
 ## Upcoming Release
+* Added a default value for [-AutoPauseDelayInMinute] parameter of command `New-AzSynapseSparkpool` and `Update-AzSynapseSparkpool`
 
 ## Version 0.19.0
 * Added support for Synapse KQL script

src/Synapse/Synapse/Commands/ManagementCommands/SparkPool/NewAzureSynapseSparkPool.cs

@@ -21,6 +21,7 @@
 using Microsoft.Azure.Management.Internal.Resources.Utilities.Models;
 using Microsoft.Azure.Management.Synapse.Models;
 using Microsoft.WindowsAzure.Commands.Utilities.Common;
+using System;
 using System.Collections;
 using System.IO;
 using System.Management.Automation;
@@ -107,7 +108,7 @@ public class NewAzureSynapseSparkPool : SynapseManagementCmdletBase
             HelpMessage = HelpMessages.AutoPauseDelayInMinute)]
         [ValidateNotNullOrEmpty]
         [ValidateRange(5, 10080)]
-        public int AutoPauseDelayInMinute { get; set; }
+        public int AutoPauseDelayInMinute { get; set; } = int.Parse(SynapseConstants.DefaultAutoPauseDelayInMinute);
 
         [Parameter(ValueFromPipelineByPropertyName = false, Mandatory = true,
             HelpMessage = HelpMessages.SparkVersion)]

src/Synapse/Synapse/Commands/ManagementCommands/SparkPool/UpdateAzureSynapseSparkPool.cs

@@ -213,7 +213,7 @@ public override void ExecuteCmdlet()
                     Enabled = this.EnableAutoPause != null ? this.EnableAutoPause : existingSparkPool.AutoPause?.Enabled ?? false,
                     DelayInMinutes = this.IsParameterBound(c => c.AutoPauseDelayInMinute)
                         ? this.AutoPauseDelayInMinute
-                        : existingSparkPool.AutoPause?.DelayInMinutes ?? 0
+                        : existingSparkPool.AutoPause?.DelayInMinutes ?? int.Parse(SynapseConstants.DefaultAutoPauseDelayInMinute)
                 };
             }
 

src/Synapse/Synapse/Common/HelpMessages.cs

@@ -88,7 +88,7 @@ public static class HelpMessages
 
         public const string DisableAutoPause = "Indicates whether Auto-pause should be disabled.";
 
-        public const string AutoPauseDelayInMinute = "Number of minutes idle. This parameter must be specified when Auto-pause is enabled.";
+        public const string AutoPauseDelayInMinute = "Number of minutes idle. This parameter can be specified when Auto-pause is enabled. If it is not specified manually, the default value will be " + SynapseConstants.DefaultAutoPauseDelayInMinute + ".";
 
         public const string SparkVersion = "Apache Spark version. Allowed values: 2.4";
 

src/Synapse/Synapse/Models/SynapseConstants.cs

@@ -203,6 +203,8 @@ public static class SynapseConstants
 
         public const string KqlScript = nameof(KqlScript);
 
+        public const string DefaultAutoPauseDelayInMinute = "15";
+
         public static Dictionary<string, ComputeNodeSize> ComputeNodeSizes = new Dictionary<string, ComputeNodeSize>
         {
             {

src/Synapse/Synapse/help/New-AzSynapseSparkPool.md

@@ -104,7 +104,7 @@ Accept wildcard characters: False
 ```
 
 ### -AutoPauseDelayInMinute
-Number of minutes idle. This parameter must be specified when Auto-pause is enabled.
+Number of minutes idle. This parameter can be specified when Auto-pause is enabled. The default value will be [15] if it is not specified manually.
 
 ```yaml
 Type: System.Int32

src/Synapse/Synapse/help/Update-AzSynapseSparkPool.md

@@ -166,7 +166,7 @@ Accept wildcard characters: False
 ```
 
 ### -AutoPauseDelayInMinute
-Number of minutes idle. This parameter must be specified when Auto-pause is enabled.
+Number of minutes idle. This parameter can be specified when Auto-pause is enabled. The default value will be [15] if it is not specified manually.
 
 ```yaml
 Type: System.Int32