Updating ActivityProcessor

src/OpenTelemetry.Exporter.Jaeger/Implementation/JaegerUdpBatcher.cs

@@ -37,7 +37,7 @@ internal class JaegerUdpBatcher : IDisposable
         private readonly System.Timers.Timer maxFlushIntervalTimer;
         private Dictionary<string, Process> processCache;
         private int batchByteSize;
-        private bool isDisposed;
+        private bool disposed;
 
         public JaegerUdpBatcher(JaegerExporterOptions options, TTransport clientTransport = null)
         {
@@ -222,7 +222,7 @@ await this.thriftClient.WriteBatchAsync(
             }
         }
 
-        protected virtual void Dispose(bool isDisposing)
+        protected virtual void Dispose(bool disposing)
         {
             try
             {
@@ -232,15 +232,15 @@ protected virtual void Dispose(bool isDisposing)
             {
             }
 
-            if (isDisposing && !this.isDisposed)
+            if (disposing && !this.disposed)
             {
                 this.maxFlushIntervalTimer.Dispose();
                 this.thriftClient.Dispose();
                 this.clientTransport.Dispose();
                 this.memoryProtocol.Dispose();
                 this.flushLock.Dispose();
 
-                this.isDisposed = true;
+                this.disposed = true;
             }
         }
 

src/OpenTelemetry.Exporter.ZPages/ZPagesProcessor.cs

@@ -29,7 +29,7 @@ namespace OpenTelemetry.Exporter.ZPages
     /// <summary>
     /// Implements the zpages span processor that exports spans in OnEnd call without batching.
     /// </summary>
-    public class ZPagesProcessor : ActivityProcessor, IDisposable
+    public class ZPagesProcessor : ActivityProcessor
     {
         private readonly ZPagesExporter exporter;
 
@@ -133,8 +133,8 @@ public override Task ForceFlushAsync(CancellationToken cancellationToken)
             throw new NotImplementedException();
         }
 
-        /// <inheritdoc />
-        public void Dispose()
+        /// <inheritdoc/>
+        protected override void Dispose(bool disposing)
         {
             throw new NotImplementedException();
         }

src/OpenTelemetry/CHANGELOG.md

@@ -2,6 +2,14 @@
 
 ## Unreleased
 
+* `ActivityProcessor` implements `IDisposable`.
+  * When `Dispose` occurs, it calls `ShutdownAsync`.
+  * If you want a custom behavior for dispose, you will have to override the
+    `Dispose(bool disposing)`.
+* `BatchingActivityProcessor`/`SimpleActivityProcessor` is disposable and it
+  disposes the containing exporter.
+* `BroadcastActivityProcessor`is disposable and it disposes the processors.
+
 ## 0.3.0-beta
 
 Released 2020-07-23

src/OpenTelemetry/Trace/ActivityProcessor.cs

@@ -13,16 +13,19 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 // </copyright>
+
+using System;
 using System.Diagnostics;
 using System.Threading;
 using System.Threading.Tasks;
+using OpenTelemetry.Internal;
 
 namespace OpenTelemetry.Trace
 {
     /// <summary>
     /// Activity processor base class.
     /// </summary>
-    public abstract class ActivityProcessor
+    public abstract class ActivityProcessor : IDisposable
     {
         /// <summary>
         /// Activity start hook.
@@ -49,5 +52,24 @@ public abstract class ActivityProcessor
         /// <param name="cancellationToken">Cancellation token.</param>
         /// <returns>Returns <see cref="Task"/>.</returns>
         public abstract Task ForceFlushAsync(CancellationToken cancellationToken);
+
+        /// <inheritdoc/>
+        public void Dispose()
+        {
+            this.Dispose(true);
+            GC.SuppressFinalize(this);
+        }
+
+        protected virtual void Dispose(bool disposing)
+        {
+            try
+            {
+                this.ShutdownAsync(CancellationToken.None).GetAwaiter().GetResult();
+            }
+            catch (Exception ex)
+            {
+                OpenTelemetrySdkEventSource.Log.SpanProcessorException(nameof(this.Dispose), ex);
+            }
+        }
     }
 }

src/OpenTelemetry/Trace/BatchingActivityProcessor.cs

@@ -27,7 +27,7 @@ namespace OpenTelemetry.Trace
     /// <summary>
     /// Implements processor that batches activities before calling exporter.
     /// </summary>
-    public class BatchingActivityProcessor : ActivityProcessor, IDisposable
+    public class BatchingActivityProcessor : ActivityProcessor
     {
         private const int DefaultMaxQueueSize = 2048;
         private const int DefaultMaxExportBatchSize = 512;
@@ -44,7 +44,7 @@ public class BatchingActivityProcessor : ActivityProcessor, IDisposable
         private readonly SemaphoreSlim flushLock = new SemaphoreSlim(1);
         private readonly System.Timers.Timer flushTimer;
         private volatile int currentQueueSize;
-        private bool isDisposed;
+        private bool disposed;
 
         /// <summary>
         /// Initializes a new instance of the <see cref="BatchingActivityProcessor"/> class with default parameters:
@@ -202,28 +202,15 @@ public override async Task ForceFlushAsync(CancellationToken cancellationToken)
             OpenTelemetrySdkEventSource.Log.ForceFlushCompleted(this.currentQueueSize);
         }
 
-        /// <inheritdoc/>
-        public void Dispose()
-        {
-            this.Dispose(true);
-        }
-
         /// <summary>
         /// Releases the unmanaged resources used by this class and optionally releases the managed resources.
         /// </summary>
         /// <param name="disposing"><see langword="true"/> to release both managed and unmanaged resources; <see langword="false"/> to release only unmanaged resources.</param>
-        protected virtual void Dispose(bool disposing)
+        protected override void Dispose(bool disposing)
         {
-            try
-            {
-                this.ShutdownAsync(CancellationToken.None).GetAwaiter().GetResult();
-            }
-            catch (Exception ex)
-            {
-                OpenTelemetrySdkEventSource.Log.SpanProcessorException(nameof(this.Dispose), ex);
-            }
+            base.Dispose(disposing);
 
-            if (disposing && !this.isDisposed)
+            if (disposing && !this.disposed)
             {
                 if (this.exporter is IDisposable disposableExporter)
                 {
@@ -239,7 +226,7 @@ protected virtual void Dispose(bool disposing)
 
                 this.flushTimer.Dispose();
                 this.flushLock.Dispose();
-                this.isDisposed = true;
+                this.disposed = true;
             }
         }
 

src/OpenTelemetry/Trace/Internal/BroadcastActivityProcessor.cs

@@ -24,10 +24,10 @@
 
 namespace OpenTelemetry.Trace.Internal
 {
-    internal class BroadcastActivityProcessor : ActivityProcessor, IDisposable
+    internal class BroadcastActivityProcessor : ActivityProcessor
     {
         private readonly IEnumerable<ActivityProcessor> processors;
-        private bool isDisposed;
+        private bool disposed;
 
         public BroadcastActivityProcessor(IEnumerable<ActivityProcessor> processors)
         {
@@ -96,23 +96,11 @@ public override Task ForceFlushAsync(CancellationToken cancellationToken)
             return Task.WhenAll(tasks);
         }
 
-        public void Dispose()
+        protected override void Dispose(bool disposing)
         {
-            this.Dispose(true);
-        }
-
-        protected virtual void Dispose(bool disposing)
-        {
-            try
-            {
-                this.ShutdownAsync(CancellationToken.None).GetAwaiter().GetResult();
-            }
-            catch (Exception ex)
-            {
-                OpenTelemetrySdkEventSource.Log.SpanProcessorException(nameof(this.Dispose), ex);
-            }
+            base.Dispose(disposing);
 
-            if (disposing && !this.isDisposed)
+            if (disposing && !this.disposed)
             {
                 foreach (var processor in this.processors)
                 {
@@ -129,7 +117,7 @@ protected virtual void Dispose(bool disposing)
                     }
                 }
 
-                this.isDisposed = true;
+                this.disposed = true;
             }
         }
     }

src/OpenTelemetry/Trace/SimpleActivityProcessor.cs

@@ -24,7 +24,7 @@ namespace OpenTelemetry.Trace
     /// <summary>
     /// Implements simple activity processor that exports activities in OnEnd call without batching.
     /// </summary>
-    public class SimpleActivityProcessor : ActivityProcessor, IDisposable
+    public class SimpleActivityProcessor : ActivityProcessor
     {
         private readonly ActivityExporter exporter;
         private bool stopped;
@@ -85,26 +85,13 @@ public override Task ForceFlushAsync(CancellationToken cancellationToken)
 #endif
         }
 
-        /// <inheritdoc/>
-        public void Dispose()
-        {
-            this.Dispose(true);
-        }
-
         /// <summary>
         /// Releases the unmanaged resources used by this class and optionally releases the managed resources.
         /// </summary>
         /// <param name="disposing"><see langword="true"/> to release both managed and unmanaged resources; <see langword="false"/> to release only unmanaged resources.</param>
-        protected virtual void Dispose(bool disposing)
+        protected override void Dispose(bool disposing)
         {
-            try
-            {
-                this.ShutdownAsync(CancellationToken.None).GetAwaiter().GetResult();
-            }
-            catch (Exception ex)
-            {
-                OpenTelemetrySdkEventSource.Log.SpanProcessorException(nameof(this.Dispose), ex);
-            }
+            base.Dispose(disposing);
 
             if (disposing)
             {

test/OpenTelemetry.Exporter.Jaeger.Tests/TestActivityProcessor.cs

@@ -73,7 +73,7 @@ public override Task ForceFlushAsync(CancellationToken cancellationToken)
 #endif
         }
 
-        public void Dispose()
+        protected override void Dispose(bool disposing)
         {
             this.DisposedCalled = true;
         }

test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/TestActivityProcessor.cs

@@ -73,7 +73,7 @@ public override Task ForceFlushAsync(CancellationToken cancellationToken)
 #endif
         }
 
-        public void Dispose()
+        protected override void Dispose(bool disposing)
         {
             this.DisposedCalled = true;
         }

test/OpenTelemetry.Exporter.ZPages.Tests/TestActivityProcessor.cs

@@ -74,7 +74,7 @@ public override Task ForceFlushAsync(CancellationToken cancellationToken)
 #endif
         }
 
-        public void Dispose()
+        protected override void Dispose(bool disposing)
         {
             this.DisposedCalled = true;
         }

test/OpenTelemetry.Exporter.Zipkin.Tests/TestActivityProcessor.cs

@@ -73,7 +73,7 @@ public override Task ForceFlushAsync(CancellationToken cancellationToken)
 #endif
         }
 
-        public void Dispose()
+        protected override void Dispose(bool disposing)
         {
             this.DisposedCalled = true;
         }

test/OpenTelemetry.Instrumentation.AspNet.Tests/HttpInListenerTests.cs

@@ -194,7 +194,7 @@ public void AspNetRequestsAreCollectedSuccessfully(
             var currentActivity = Activity.Current;
 
             Activity span;
-            Assert.Equal(2, activityProcessor.Invocations.Count); // begin and end was called
+            Assert.Equal(3, activityProcessor.Invocations.Count); // begin/end/dispose was called
             span = (Activity)activityProcessor.Invocations[1].Arguments[0];
 
             Assert.Equal(routeTemplate ?? HttpContext.Current.Request.Path, span.DisplayName);

test/OpenTelemetry.Instrumentation.GrpcClient.Tests/GrpcClientTests.cs

@@ -66,7 +66,7 @@ public void GrpcClientCallsAreCollectedSuccessfully(string baseAddress)
                 var rs = client.SayHello(new HelloRequest());
             }
 
-            Assert.Equal(2, spanProcessor.Invocations.Count); // begin and end was called
+            Assert.Equal(3, spanProcessor.Invocations.Count); // start/end/dispose was called
             var span = (Activity)spanProcessor.Invocations[1].Arguments[0];
 
             Assert.Equal(parent.TraceId, span.Context.TraceId);
@@ -117,7 +117,7 @@ public void GrpcAndHttpClientInstrumentationIsInvoked()
                 var rs = client.SayHello(new HelloRequest());
             }
 
-            Assert.Equal(4, spanProcessor.Invocations.Count); // begin and end was called for Grpc call and underlying Http call
+            Assert.Equal(5, spanProcessor.Invocations.Count); // begin and end was called for Grpc call and underlying Http call + dispose
             var httpSpan = (Activity)spanProcessor.Invocations[2].Arguments[0];
             var grpcSpan = (Activity)spanProcessor.Invocations[3].Arguments[0];
 

test/OpenTelemetry.Instrumentation.Http.Tests/HttpClientTests.Basic.netcore31.cs

@@ -98,7 +98,7 @@ public async Task HttpClientInstrumentationInjectsHeadersAsync()
                 await c.SendAsync(request);
             }
 
-            Assert.Equal(2, spanProcessor.Invocations.Count); // begin and end was called
+            Assert.Equal(3, spanProcessor.Invocations.Count); // start/end/dispose was called
             var span = (Activity)spanProcessor.Invocations[1].Arguments[0];
 
             Assert.Equal(parent.TraceId, span.Context.TraceId);
@@ -151,7 +151,7 @@ public async Task HttpClientInstrumentationInjectsHeadersAsync_CustomFormat()
                 await c.SendAsync(request);
             }
 
-            Assert.Equal(2, spanProcessor.Invocations.Count); // begin and end was called
+            Assert.Equal(3, spanProcessor.Invocations.Count); // start/end/dispose was called
             var span = (Activity)spanProcessor.Invocations[1].Arguments[0];
 
             Assert.Equal(parent.TraceId, span.Context.TraceId);
@@ -225,7 +225,7 @@ public async Task HttpClientInstrumentationBacksOffIfAlreadyInstrumented()
                 await c.SendAsync(request);
             }
 
-            Assert.Equal(0, spanProcessor.Invocations.Count);
+            Assert.Equal(1, spanProcessor.Invocations.Count); // dispose
         }
 
         [Fact]
@@ -243,7 +243,7 @@ public async void HttpClientInstrumentationFiltersOutRequests()
                 await c.GetAsync(this.url);
             }
 
-            Assert.Equal(0, spanProcessor.Invocations.Count);
+            Assert.Equal(1, spanProcessor.Invocations.Count);  // dispose
         }
 
         [Fact]
@@ -268,7 +268,7 @@ public async Task HttpClientInstrumentationFiltersOutRequestsToExporterEndpoints
                 }
             }
 
-            Assert.Equal(0, spanProcessor.Invocations.Count);
+            Assert.Equal(1, spanProcessor.Invocations.Count);  // dispose
         }
 
         public void Dispose()

test/OpenTelemetry.Instrumentation.Http.Tests/HttpClientTests.netcore31.cs

@@ -85,7 +85,7 @@ public async Task HttpOutCallsAreCollectedSuccessfullyAsync(HttpTestData.HttpOut
                 }
             }
 
-            Assert.Equal(2, spanProcessor.Invocations.Count); // begin and end was called
+            Assert.Equal(3, spanProcessor.Invocations.Count); // start/end/dispose was called
             var span = (Activity)spanProcessor.Invocations[1].Arguments[0];
 
             Assert.Equal(tc.SpanName, span.DisplayName);

test/OpenTelemetry.Instrumentation.SqlClient.Tests/SqlClientTests.cs

@@ -173,7 +173,7 @@ public void SqlClientCallsAreCollectedSuccessfully(
                     afterExecuteEventData);
             }
 
-            Assert.Equal(2, spanProcessor.Invocations.Count); // begin and end was called
+            Assert.Equal(3, spanProcessor.Invocations.Count); // start/end/dispose was called
 
             VerifyActivityData(sqlCommand.CommandType, sqlCommand.CommandText, captureStoredProcedureCommandName, captureTextCommandContent, false, sqlConnection.DataSource, (Activity)spanProcessor.Invocations[1].Arguments[0]);
         }
@@ -219,7 +219,7 @@ public void SqlClientErrorsAreCollectedSuccessfully(string beforeCommand, string
                     commandErrorEventData);
             }
 
-            Assert.Equal(2, spanProcessor.Invocations.Count); // begin and end was called
+            Assert.Equal(3, spanProcessor.Invocations.Count); // begin and end was called
 
             VerifyActivityData(sqlCommand.CommandType, sqlCommand.CommandText, true, false, true, sqlConnection.DataSource, (Activity)spanProcessor.Invocations[1].Arguments[0]);
         }