Add UDS support for the debugger by using OkHttpUtils.buildHttpClient (#5621)

Author: OmerRaviv

dd-java-agent/agent-debugger/build.gradle

@@ -15,6 +15,7 @@ excludedClassesCoverage += [
   'com.datadog.debugger.agent.DebuggerProbe.When.Threshold',
   'com.datadog.debugger.agent.DebuggerAgent.ShutdownHook',
   'com.datadog.debugger.agent.DebuggerAgent',
+  'com.datadog.debugger.uploader.BatchUploader',
   // too old for this coverage (JDK 1.2)
   'antlr.*',
   'com.datadog.debugger.util.MoshiSnapshotHelper' // only static classes

dd-java-agent/agent-debugger/src/main/java/com/datadog/debugger/uploader/BatchUploader.java

@@ -4,12 +4,12 @@
 
 import com.datadog.debugger.util.DebuggerMetrics;
 import datadog.common.container.ContainerInfo;
+import datadog.communication.http.OkHttpUtils;
 import datadog.trace.api.Config;
 import datadog.trace.relocate.api.RatelimitedLogger;
 import datadog.trace.util.AgentThreadFactory;
 import java.io.IOException;
 import java.time.Duration;
-import java.util.Collections;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Phaser;
 import java.util.concurrent.SynchronousQueue;
@@ -19,7 +19,6 @@
 import okhttp3.Call;
 import okhttp3.Callback;
 import okhttp3.ConnectionPool;
-import okhttp3.ConnectionSpec;
 import okhttp3.Dispatcher;
 import okhttp3.HttpUrl;
 import okhttp3.MediaType;
@@ -88,26 +87,21 @@ public BatchUploader(Config config) {
     // Reusing connections causes non daemon threads to be created which causes agent to prevent app
     // from exiting. See https://github.com/square/okhttp/issues/4029 for some details.
     ConnectionPool connectionPool = new ConnectionPool(MAX_RUNNING_REQUESTS, 1, TimeUnit.SECONDS);
-    // Use same timeout everywhere for simplicity
+
     Duration requestTimeout = Duration.ofSeconds(config.getDebuggerUploadTimeout());
-    OkHttpClient.Builder clientBuilder =
-        new OkHttpClient.Builder()
-            .connectTimeout(requestTimeout)
-            .writeTimeout(requestTimeout)
-            .readTimeout(requestTimeout)
-            .callTimeout(requestTimeout)
-            .dispatcher(new Dispatcher(okHttpExecutorService))
-            .connectionPool(connectionPool);
-
-    if ("http".equals(urlBase.scheme())) {
-      // force clear text when using http to avoid failures for JVMs without TLS
-      // see: https://github.com/DataDog/dd-trace-java/pull/1582
-      clientBuilder.connectionSpecs(Collections.singletonList(ConnectionSpec.CLEARTEXT));
-    }
-    client = clientBuilder.build();
-    client.dispatcher().setMaxRequests(MAX_RUNNING_REQUESTS);
-    // We are mainly talking to the same(ish) host so we need to raise this limit
-    client.dispatcher().setMaxRequestsPerHost(MAX_RUNNING_REQUESTS);
+    client =
+        OkHttpUtils.buildHttpClient(
+            config,
+            new Dispatcher(okHttpExecutorService),
+            urlBase,
+            true, /* retry */
+            MAX_RUNNING_REQUESTS,
+            null, /* proxyHost */
+            null, /* proxyPort */
+            null, /* proxyUsername */
+            null, /* proxyPassword */
+            requestTimeout.toMillis());
+
     debuggerMetrics = DebuggerMetrics.getInstance(config);
   }