AzureAD
diff --git a/‎changelog.txt‎
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diff --git a/‎common4j/build.gradle‎
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diff --git a/‎common4j/src/main/com/microsoft/identity/common/java/commands/SilentTokenCommand.java‎
Lines changed: 6 additions & 0 deletions b/‎common4j/src/main/com/microsoft/identity/common/java/commands/SilentTokenCommand.java‎
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diff --git a/‎common4j/src/main/com/microsoft/identity/common/java/controllers/CommandDispatcher.java‎
Lines changed: 9 additions & 0 deletions b/‎common4j/src/main/com/microsoft/identity/common/java/controllers/CommandDispatcher.java‎
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diff --git a/‎common4j/src/main/com/microsoft/identity/common/java/opentelemetry/BenchmarkSpan.kt‎
Lines changed: 183 additions & 0 deletions b/‎common4j/src/main/com/microsoft/identity/common/java/opentelemetry/BenchmarkSpan.kt‎
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@@ -1,5 +1,6 @@
 vNext
 ----------
+- [MINOR] Add OTel Benchmarker (#2786)
 - [MAJOR] Add KeyStoreBackedSecretKeyProvider (#2674)
 - [MINOR] Add Open Id configuration issuer validation reporting in OpenIdProviderConfigurationClient (#2751)
 - [MINOR] Add helper method to record elapsed time (#2768)
 
@@ -166,6 +166,7 @@ def nativeAuthConfigFilePathParameter = "" // will be blank unless specified by
 def nativeAuthConfigStringParameter = "" // will be blank unless specified by developer, used to run e2e tests in CI
 def disableAcquireTokenSilentTimeoutParameter = false // will be false unless specified by developer
 def allowOneboxAuthorities = false // will be false unless specified by developer
+def shouldSkipSilentTokenCommandCacheForStressTest = false // will be false unless specified by developer, required for running concurrent stress test in MSAL/Broker.
 
 if (project.hasProperty("slice")) {
     sliceParameter = slice
@@ -205,6 +206,10 @@ if (project.hasProperty("allowOneboxAuthorities")) {
     allowOneboxAuthorities = true
 }
 
+if (project.hasProperty("shouldSkipSilentTokenCommandCacheForStressTest")) {
+    shouldSkipSilentTokenCommandCacheForStressTest = true
+}
+
 sourceSets {
     main {
         java.srcDirs = ['src/main', "$project.buildDir/generated/source/buildConfig/main"]
@@ -216,6 +221,7 @@ sourceSets {
         buildConfigField("String", "NATIVE_AUTH_CONFIG_STRING", "\"$nativeAuthConfigStringParameter\"")
         buildConfigField("boolean", "DISABLE_ACQUIRE_TOKEN_SILENT_TIMEOUT", "${disableAcquireTokenSilentTimeoutParameter}")
         buildConfigField("boolean", "ALLOW_ONEBOX_AUTHORITIES", "${allowOneboxAuthorities}")
+        buildConfigField("boolean", "SHOULD_SKIP_SILENT_TOKEN_COMMAND_CACHE_FOR_STRESS_TEST", "${shouldSkipSilentTokenCommandCacheForStressTest}")
     }
     test {
         java.srcDirs = ['src/test']
 
@@ -22,6 +22,7 @@
 //  THE SOFTWARE.
 package com.microsoft.identity.common.java.commands;
 
+import com.microsoft.identity.common.java.BuildConfig;
 import com.microsoft.identity.common.java.WarningType;
 import com.microsoft.identity.common.java.commands.parameters.SilentTokenCommandParameters;
 import com.microsoft.identity.common.java.constants.OAuth2ErrorCode;
@@ -150,6 +151,11 @@ public AcquireTokenResult execute() throws Exception {
 
     @Override
     public boolean isEligibleForCaching() {
+        if (BuildConfig.SHOULD_SKIP_SILENT_TOKEN_COMMAND_CACHE_FOR_STRESS_TEST) {
+            // by disabling this, MSAL/Broker will allow similar request to be executed
+            // as opposed to being handled by cache.
+            return false;
+        }
         return true;
     }
 
 
@@ -89,6 +89,7 @@
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
+import java.util.concurrent.ThreadPoolExecutor;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.TimeoutException;
 
@@ -114,6 +115,14 @@ public class CommandDispatcher {
     @SuppressWarnings(WarningType.rawtype_warning)
     private static ConcurrentMap<BaseCommand, FinalizableResultFuture<CommandResult>> sExecutingCommandMap = new ConcurrentHashMap<>();
 
+    /**
+     * Returns the approximate number of threads that are actively
+     * executing tasks in the silent request thread pool.
+     */
+    public static int getSilentRequestActiveCount(){
+        return ((ThreadPoolExecutor)sSilentExecutor).getActiveCount();
+    }
+
     /**
      * Remove all keys that are the command reference from the executing command map.  Since if they key has
      * been changed, remove will not work, construct a new map and add all keys that are not identically
 
@@ -0,0 +1,183 @@
+// Copyright (c) Microsoft Corporation.
+// All rights reserved.
+//
+// This code is licensed under the MIT License.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files(the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions :
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+package com.microsoft.identity.common.java.opentelemetry
+
+import com.microsoft.identity.common.java.controllers.CommandDispatcher
+import io.opentelemetry.api.common.AttributeKey
+import io.opentelemetry.api.common.Attributes
+import io.opentelemetry.api.trace.Span
+import io.opentelemetry.api.trace.SpanContext
+import io.opentelemetry.api.trace.StatusCode
+import java.util.concurrent.TimeUnit
+
+interface IBenchmarkSpan {
+    /**
+     * Returns a list of status changes along with their timestamps in nanoseconds.
+     **/
+    fun getStatuses(): List<Pair<String, Long>>
+
+    /**
+     * Returns the span name.
+     **/
+    fun getSpanName(): String
+
+    /**
+     * The start time of the span in nanoseconds.
+     **/
+    fun getStartTimeInNanoSeconds(): Long
+
+    /**
+     * The end time of the span in nanoseconds.
+     **/
+    fun getEndTimeInNanoSeconds(): Long
+
+    /**
+     * # of concurrent active silent requests when this span is started.
+     **/
+    fun getConcurrentSilentRequestSize(): Int
+
+    /**
+     * The exception recorded on this span, if any.
+     **/
+    fun getException(): Throwable?
+}
+
+/**
+ * A span wrapper class for benchmarking purposes.
+ *
+ * @param originalSpan  The original span to be wrapped.
+ * @param printer       The printer to print the benchmark results.
+ * @param spanName      The name of the span.
+ **/
+class BenchmarkSpan(
+    val originalSpan: Span,
+    val printer: IBenchmarkSpanPrinter,
+    private val spanName: String) : Span, IBenchmarkSpan {
+
+    // Pair of (status name, timestamp in nano seconds)
+    val statuses : ArrayList<Pair<String, Long>> = arrayListOf()
+    private var exception: Throwable? = null
+
+    private var startTimeInNanoSeconds: Long = System.nanoTime()
+    private var endTimeInNanoSeconds: Long = 0L
+
+    // # of concurrent active silent requests when this span is started.
+    private var concurrentSize = 1
+
+    override fun getStatuses(): List<Pair<String, Long>> {
+        return statuses
+    }
+
+    override fun getSpanName(): String {
+        return spanName
+    }
+
+    override fun getStartTimeInNanoSeconds(): Long {
+        return startTimeInNanoSeconds
+    }
+
+    override fun getEndTimeInNanoSeconds(): Long {
+        return endTimeInNanoSeconds
+    }
+
+    override fun getConcurrentSilentRequestSize(): Int {
+        return concurrentSize
+    }
+
+    override fun getException(): Throwable? {
+        return exception
+    }
+
+    fun start(){
+        startTimeInNanoSeconds = System.nanoTime()
+        concurrentSize = CommandDispatcher.getSilentRequestActiveCount()
+    }
+
+    override fun end() {
+        endTimeInNanoSeconds = System.nanoTime()
+        printer.printAsync(this)
+        return originalSpan.end()
+    }
+
+    override fun end(timestamp: Long, unit: TimeUnit) {
+        endTimeInNanoSeconds = System.nanoTime()
+        printer.printAsync(this)
+        return originalSpan.end(timestamp, unit)
+    }
+
+    override fun <T : Any?> setAttribute(
+        key: AttributeKey<T>,
+        value: T
+    ): Span? {
+        statuses.add(Pair(key.toString(), System.nanoTime()))
+        return originalSpan.setAttribute(key, value)
+    }
+
+    override fun addEvent(
+        name: String,
+        attributes: Attributes
+    ): Span? {
+        statuses.add(Pair(name, System.nanoTime()))
+        return originalSpan.addEvent(name, attributes)
+    }
+
+    override fun addEvent(
+        name: String,
+        attributes: Attributes,
+        timestamp: Long,
+        unit: TimeUnit
+    ): Span? {
+        statuses.add(Pair(name, System.nanoTime()))
+        return originalSpan.addEvent(name, attributes, timestamp, unit)
+    }
+
+    override fun setStatus(
+        statusCode: StatusCode,
+        description: String
+    ): Span? {
+        statuses.add(Pair("SetStatus:$statusCode", System.nanoTime()))
+        return originalSpan.setStatus(statusCode, description)
+    }
+
+    override fun recordException(
+        exception: Throwable,
+        additionalAttributes: Attributes
+    ): Span? {
+        val timestamp = System.nanoTime()
+        statuses.add(Pair("recordException", timestamp))
+        this.exception = exception
+        return originalSpan.recordException(exception, additionalAttributes)
+    }
+
+    override fun updateName(name: String): Span? {
+        return originalSpan.updateName(name)
+    }
+
+    override fun getSpanContext(): SpanContext? {
+        return originalSpan.spanContext
+    }
+
+    override fun isRecording(): Boolean {
+        return originalSpan.isRecording
+    }
+}