Monitoring provider will no longer throw on Ensure priority.

Fix: Issue where an uncritical subsystem could crash the app.

NzbDrone.App.Test/MonitoringProviderTest.cs

@@ -1,4 +1,5 @@
-using System.Diagnostics;
+using System;
+using System.Diagnostics;
 using System.Linq;
 
 using FizzWare.NBuilder;
@@ -8,7 +9,6 @@ using NzbDrone.Common;
 using NzbDrone.Common.Model;
 using NzbDrone.Providers;
 using NzbDrone.Test.Common;
-using NzbDrone.Test.Common.AutoMoq;
 
 namespace NzbDrone.App.Test
 {
@@ -19,17 +19,21 @@ namespace NzbDrone.App.Test
         [Test]
         public void Ensure_priority_doesnt_fail_on_invalid_iis_proccess_id()
         {
-            var processMock = Mocker.GetMock<ProcessProvider>();
-            processMock.Setup(c => c.GetCurrentProcess())
+            Mocker.GetMock<ProcessProvider>().Setup(c => c.GetCurrentProcess())
                 .Returns(Builder<ProcessInfo>.CreateNew().With(c => c.Priority == ProcessPriorityClass.Normal).Build());
 
-            processMock.Setup(c => c.GetProcessById(It.IsAny<int>())).Returns((ProcessInfo)null);
+            Mocker.GetMock<ProcessProvider>().Setup(c => c.GetProcessById(It.IsAny<int>())).Returns((ProcessInfo)null);
 
-            var subject = Mocker.Resolve<MonitoringProvider>();
+            Mocker.Resolve<MonitoringProvider>().EnsurePriority(null);
+        }
 
+        [Test]
+        public void Ensure_should_log_warn_exception_rather_than_throw()
+        {
+            Mocker.GetMock<ProcessProvider>().Setup(c => c.GetCurrentProcess()).Throws<InvalidOperationException>();
+            Mocker.Resolve<MonitoringProvider>().EnsurePriority(null);
 
-            //Act
-            subject.EnsurePriority(null);
+            ExceptionVerification.ExpectedWarns(1);
         }
 
 

NzbDrone.App.Test/NzbDrone.App.Test.csproj

@@ -46,6 +46,9 @@
     <Reference Include="Ninject">
       <HintPath>..\packages\Ninject.2.2.1.4\lib\net40-Full\Ninject.dll</HintPath>
     </Reference>
+    <Reference Include="NLog, Version=2.0.0.0, Culture=neutral, PublicKeyToken=5120e14c03d0593c, processorArchitecture=MSIL">
+      <HintPath>..\packages\NLog.2.0.0.2000\lib\net40\NLog.dll</HintPath>
+    </Reference>
     <Reference Include="nunit.framework, Version=2.6.0.12051, Culture=neutral, PublicKeyToken=96d09a1eb7f44a77, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
       <HintPath>..\packages\NUnit.2.6.0.12054\lib\nunit.framework.dll</HintPath>

NzbDrone.App.Test/packages.config

@@ -4,5 +4,6 @@
   <package id="Moq" version="4.0.10827" />
   <package id="NBuilder" version="3.0.1.1" />
   <package id="Ninject" version="2.2.1.4" />
+  <package id="NLog" version="2.0.0.2000" />
   <package id="NUnit" version="2.6.0.12054" />
 </packages>

NzbDrone/Providers/MonitoringProvider.cs

@@ -44,7 +44,7 @@ namespace NzbDrone.Providers
 
             AppDomain.CurrentDomain.ProcessExit += ProgramExited;
             AppDomain.CurrentDomain.DomainUnload += ProgramExited;
-            
+
             _processPriorityCheckTimer = new Timer(EnsurePriority);
             _processPriorityCheckTimer.Change(TimeSpan.FromSeconds(15), TimeSpan.FromMinutes(30));
 
@@ -55,17 +55,24 @@ namespace NzbDrone.Providers
 
         public virtual void EnsurePriority(object sender)
         {
-            var currentProcess = _processProvider.GetCurrentProcess();
-            if (currentProcess.Priority != ProcessPriorityClass.Normal)
+            try
             {
-                _processProvider.SetPriority(currentProcess.Id, ProcessPriorityClass.Normal);
-            }
+                var currentProcess = _processProvider.GetCurrentProcess();
+                if (currentProcess.Priority != ProcessPriorityClass.Normal)
+                {
+                    _processProvider.SetPriority(currentProcess.Id, ProcessPriorityClass.Normal);
+                }
 
-            var iisProcess = _processProvider.GetProcessById(_iisProvider.IISProcessId);
-            if (iisProcess != null && iisProcess.Priority != ProcessPriorityClass.Normal &&
-                iisProcess.Priority != ProcessPriorityClass.AboveNormal)
+                var iisProcess = _processProvider.GetProcessById(_iisProvider.IISProcessId);
+                if (iisProcess != null && iisProcess.Priority != ProcessPriorityClass.Normal &&
+                    iisProcess.Priority != ProcessPriorityClass.AboveNormal)
+                {
+                    _processProvider.SetPriority(iisProcess.Id, ProcessPriorityClass.Normal);
+                }
+            }
+            catch (Exception e)
             {
-                _processProvider.SetPriority(iisProcess.Id, ProcessPriorityClass.Normal);
+                logger.WarnException("Unable to verify priority", e);
             }
         }