Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / Data / System / Data / ProviderBase / DbConnectionPoolCounters.cs / 1 / DbConnectionPoolCounters.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //----------------------------------------------------------------------------- namespace System.Data.ProviderBase { using System; using System.Collections; using System.Data.Common; using System.Diagnostics; using System.Globalization; using System.Reflection; using System.Runtime.ConstrainedExecution; using System.Security; using System.Security.Permissions; using System.Security.Principal; internal abstract class DbConnectionPoolCounters { private static class CreationData { #if CREATEONLY internal const int NumberOfCounters = 14; #endif static internal readonly CounterCreationData HardConnectsPerSecond = new CounterCreationData( "HardConnectsPerSecond", "The number of actual connections per second that are being made to servers", PerformanceCounterType.RateOfCountsPerSecond32); static internal readonly CounterCreationData HardDisconnectsPerSecond = new CounterCreationData( "HardDisconnectsPerSecond", "The number of actual disconnects per second that are being made to servers", PerformanceCounterType.RateOfCountsPerSecond32); static internal readonly CounterCreationData SoftConnectsPerSecond = new CounterCreationData( "SoftConnectsPerSecond", "The number of connections we get from the pool per second", PerformanceCounterType.RateOfCountsPerSecond32); static internal readonly CounterCreationData SoftDisconnectsPerSecond = new CounterCreationData( "SoftDisconnectsPerSecond", "The number of connections we return to the pool per second", PerformanceCounterType.RateOfCountsPerSecond32); static internal readonly CounterCreationData NumberOfNonPooledConnections = new CounterCreationData( "NumberOfNonPooledConnections", "The number of connections that are not using connection pooling", PerformanceCounterType.NumberOfItems32); static internal readonly CounterCreationData NumberOfPooledConnections = new CounterCreationData( "NumberOfPooledConnections", "The number of connections that are managed by the connection pooler", PerformanceCounterType.NumberOfItems32); static internal readonly CounterCreationData NumberOfActiveConnectionPoolGroups = new CounterCreationData( "NumberOfActiveConnectionPoolGroups", "The number of unique connection strings", PerformanceCounterType.NumberOfItems32); static internal readonly CounterCreationData NumberOfInactiveConnectionPoolGroups = new CounterCreationData( "NumberOfInactiveConnectionPoolGroups", "The number of unique connection strings waiting for pruning", PerformanceCounterType.NumberOfItems32); static internal readonly CounterCreationData NumberOfActiveConnectionPools = new CounterCreationData( "NumberOfActiveConnectionPools", "The number of connection pools", PerformanceCounterType.NumberOfItems32); static internal readonly CounterCreationData NumberOfInactiveConnectionPools = new CounterCreationData( "NumberOfInactiveConnectionPools", "The number of connection pools", PerformanceCounterType.NumberOfItems32); static internal readonly CounterCreationData NumberOfActiveConnections = new CounterCreationData( "NumberOfActiveConnections", "The number of connections currently in-use", PerformanceCounterType.NumberOfItems32); static internal readonly CounterCreationData NumberOfFreeConnections = new CounterCreationData( "NumberOfFreeConnections", "The number of connections currently available for use", PerformanceCounterType.NumberOfItems32); static internal readonly CounterCreationData NumberOfStasisConnections = new CounterCreationData( "NumberOfStasisConnections", "The number of connections currently waiting to be made ready for use", PerformanceCounterType.NumberOfItems32); static internal readonly CounterCreationData NumberOfReclaimedConnections = new CounterCreationData( "NumberOfReclaimedConnections", "The number of connections we reclaim from GC'd external connections", PerformanceCounterType.NumberOfItems32); }; sealed internal class Counter { private PerformanceCounter _instance; internal Counter (string categoryName, string instanceName, string counterName, PerformanceCounterType counterType) { if (ADP.IsPlatformNT5) { try { if (!ADP.IsEmpty(categoryName) && !ADP.IsEmpty(instanceName)) { PerformanceCounter instance = new PerformanceCounter(); instance.CategoryName = categoryName; instance.CounterName = counterName; instance.InstanceName = instanceName; instance.InstanceLifetime = PerformanceCounterInstanceLifetime.Process; instance.ReadOnly = false; instance.RawValue = 0; // make sure we start out at zero _instance = instance; } } catch (InvalidOperationException e) { ADP.TraceExceptionWithoutRethrow(e); // } } } internal void Decrement() { PerformanceCounter instance = _instance; if (null != instance) { instance.Decrement(); } } [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)] internal void Dispose () { // PerformanceCounter instance = _instance; _instance = null; if (null != instance) { instance.RemoveInstance(); // should we be calling instance.Close? // if we do will it exacerbate the Dispose vs. Decrement race condition //instance.Close(); } } internal void Increment() { PerformanceCounter instance = _instance; if (null != instance) { instance.Increment(); } } }; internal readonly Counter HardConnectsPerSecond; internal readonly Counter HardDisconnectsPerSecond; internal readonly Counter SoftConnectsPerSecond; internal readonly Counter SoftDisconnectsPerSecond; internal readonly Counter NumberOfNonPooledConnections; internal readonly Counter NumberOfPooledConnections; internal readonly Counter NumberOfActiveConnectionPoolGroups; internal readonly Counter NumberOfInactiveConnectionPoolGroups; internal readonly Counter NumberOfActiveConnectionPools; internal readonly Counter NumberOfInactiveConnectionPools; internal readonly Counter NumberOfActiveConnections; internal readonly Counter NumberOfFreeConnections; internal readonly Counter NumberOfStasisConnections; internal readonly Counter NumberOfReclaimedConnections; protected DbConnectionPoolCounters() : this(null, null) { } protected DbConnectionPoolCounters(string categoryName, string categoryHelp) { AppDomain.CurrentDomain.DomainUnload += new EventHandler(this.UnloadEventHandler); AppDomain.CurrentDomain.ProcessExit += new EventHandler(this.ExitEventHandler); AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(this.ExceptionEventHandler); string instanceName = null; if (!ADP.IsEmpty(categoryName)) { if (ADP.IsPlatformNT5) { #if CREATEONLY if (!PerformanceCounterCategory.Exists(categoryName)) { CreateCounters(categoryName, categoryHelp); } #endif //CREATEONLY instanceName = GetInstanceName(); } } // level 0-3: hard connects/disconnects, plus basic pool/pool entry statistics string basicCategoryName = categoryName; HardConnectsPerSecond = new Counter(basicCategoryName, instanceName, CreationData.HardConnectsPerSecond.CounterName, CreationData.HardConnectsPerSecond.CounterType); HardDisconnectsPerSecond = new Counter(basicCategoryName, instanceName, CreationData.HardDisconnectsPerSecond.CounterName, CreationData.HardDisconnectsPerSecond.CounterType); NumberOfNonPooledConnections = new Counter(basicCategoryName, instanceName, CreationData.NumberOfNonPooledConnections.CounterName, CreationData.NumberOfNonPooledConnections.CounterType); NumberOfPooledConnections = new Counter(basicCategoryName, instanceName, CreationData.NumberOfPooledConnections.CounterName, CreationData.NumberOfPooledConnections.CounterType); NumberOfActiveConnectionPoolGroups = new Counter(basicCategoryName, instanceName, CreationData.NumberOfActiveConnectionPoolGroups.CounterName, CreationData.NumberOfActiveConnectionPoolGroups.CounterType); NumberOfInactiveConnectionPoolGroups = new Counter(basicCategoryName, instanceName, CreationData.NumberOfInactiveConnectionPoolGroups.CounterName, CreationData.NumberOfInactiveConnectionPoolGroups.CounterType); NumberOfActiveConnectionPools = new Counter(basicCategoryName, instanceName, CreationData.NumberOfActiveConnectionPools.CounterName, CreationData.NumberOfActiveConnectionPools.CounterType); NumberOfInactiveConnectionPools = new Counter(basicCategoryName, instanceName, CreationData.NumberOfInactiveConnectionPools.CounterName, CreationData.NumberOfInactiveConnectionPools.CounterType); NumberOfStasisConnections = new Counter(basicCategoryName, instanceName, CreationData.NumberOfStasisConnections.CounterName, CreationData.NumberOfStasisConnections.CounterType); NumberOfReclaimedConnections = new Counter(basicCategoryName, instanceName, CreationData.NumberOfReclaimedConnections.CounterName, CreationData.NumberOfReclaimedConnections.CounterType); // level 4: expensive stuff string verboseCategoryName = null; if (!ADP.IsEmpty(categoryName)) { // don't load TraceSwitch if no categoryName so that Odbc/OleDb have a chance of not loading TraceSwitch // which are also used by System.Diagnostics.PerformanceCounter.ctor & System.Transactions.get_Current TraceSwitch perfCtrSwitch = new TraceSwitch("ConnectionPoolPerformanceCounterDetail", "level of detail to track with connection pool performance counters"); if (TraceLevel.Verbose == perfCtrSwitch.Level) { verboseCategoryName = categoryName; } } SoftConnectsPerSecond = new Counter(verboseCategoryName, instanceName, CreationData.SoftConnectsPerSecond.CounterName, CreationData.SoftConnectsPerSecond.CounterType); SoftDisconnectsPerSecond = new Counter(verboseCategoryName, instanceName, CreationData.SoftDisconnectsPerSecond.CounterName, CreationData.SoftDisconnectsPerSecond.CounterType); NumberOfActiveConnections = new Counter(verboseCategoryName, instanceName, CreationData.NumberOfActiveConnections.CounterName, CreationData.NumberOfActiveConnections.CounterType); NumberOfFreeConnections = new Counter(verboseCategoryName, instanceName, CreationData.NumberOfFreeConnections.CounterName, CreationData.NumberOfFreeConnections.CounterType); } [FileIOPermission(SecurityAction.Assert, Unrestricted=true)] private string GetAssemblyName() { string result = null; // First try GetEntryAssembly name, then AppDomain.FriendlyName. Assembly assembly = Assembly.GetEntryAssembly(); if (null != assembly) { AssemblyName name = assembly.GetName(); if (name != null) { result = name.Name; // MDAC 73469 } } return result; } private string GetInstanceName() { string result = null; string instanceName = GetAssemblyName(); // instance perfcounter name if (ADP.IsEmpty(instanceName)) { AppDomain appDomain = AppDomain.CurrentDomain; if (null != appDomain) { instanceName = appDomain.FriendlyName; } } int pid = SafeNativeMethods.GetCurrentProcessId(); // result = String.Format((IFormatProvider)null, "{0}[{1}]", instanceName, pid); result = result.Replace('(','[').Replace(')',']').Replace('#','_').Replace('/','_').Replace('\\','_'); return result; } [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)] public void Dispose() { // ExceptionEventHandler with IsTerminiating may be called before // the Connection Close is called or the variables are initialized SafeDispose(HardConnectsPerSecond); SafeDispose(HardDisconnectsPerSecond); SafeDispose(SoftConnectsPerSecond); SafeDispose(SoftDisconnectsPerSecond); SafeDispose(NumberOfNonPooledConnections); SafeDispose(NumberOfPooledConnections); SafeDispose(NumberOfActiveConnectionPoolGroups); SafeDispose(NumberOfInactiveConnectionPoolGroups); SafeDispose(NumberOfActiveConnectionPools); SafeDispose(NumberOfActiveConnections); SafeDispose(NumberOfFreeConnections); SafeDispose(NumberOfStasisConnections); SafeDispose(NumberOfReclaimedConnections); } [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)] private void SafeDispose(Counter counter) { // WebData 103603 if (null != counter) { counter.Dispose(); } } [PrePrepareMethod] void ExceptionEventHandler (object sender, UnhandledExceptionEventArgs e) { if ((null != e) && e.IsTerminating) { Dispose(); } } [PrePrepareMethod] void ExitEventHandler (object sender, EventArgs e) { Dispose(); } [PrePrepareMethod] void UnloadEventHandler (object sender, EventArgs e) { Dispose(); } #if CREATEONLY private void CreateCounters(string categoryName, string categoryHelp) { int i = 0; CounterCreationData[] myCounterCreationData = new CounterCreationData[CreationData.NumberOfCounters]; myCounterCreationData[i++] = CreationData.HardConnectsPerSecond; myCounterCreationData[i++] = CreationData.HardDisconnectsPerSecond; myCounterCreationData[i++] = CreationData.SoftConnectsPerSecond; myCounterCreationData[i++] = CreationData.SoftDisconnectsPerSecond; myCounterCreationData[i++] = CreationData.NumberOfNonPooledConnections; myCounterCreationData[i++] = CreationData.NumberOfPooledConnections; myCounterCreationData[i++] = CreationData.NumberOfActiveConnectionPoolGroups; myCounterCreationData[i++] = CreationData.NumberOfInactiveConnectionPoolGroups; myCounterCreationData[i++] = CreationData.NumberOfActiveConnectionPools; myCounterCreationData[i++] = CreationData.NumberOfInactiveConnectionPools; myCounterCreationData[i++] = CreationData.NumberOfActiveConnections; myCounterCreationData[i++] = CreationData.NumberOfFreeConnections; myCounterCreationData[i++] = CreationData.NumberOfStasisConnections; myCounterCreationData[i++] = CreationData.NumberOfReclaimedConnections; CounterCreationDataCollection myCounterCollection = new CounterCreationDataCollection(myCounterCreationData); CreateCountersSafe(categoryName, categoryHelp, myCounterCollection); for(i = 0; i < myCounterCollection.Count; i++) { myCounterCollection.Remove(myCounterCreationData[i]); } } private void CreateCountersSafe(string categoryName, string categoryHelp, CounterCreationDataCollection myCounterCollection) { (new PerformanceCounterPermission(PerformanceCounterPermissionAccess.Instrument, ".", categoryName)).Assert(); try { PerformanceCounterCategory.Create(categoryName, categoryHelp, myCounterCollection); } finally { PerformanceCounterPermission.RevertAssert(); } } #endif //CREATEONLY } sealed internal class DbConnectionPoolCountersNoCounters : DbConnectionPoolCounters { public static readonly DbConnectionPoolCountersNoCounters SingletonInstance = new DbConnectionPoolCountersNoCounters(); private DbConnectionPoolCountersNoCounters() : base () { } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. 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