Ad config via env var to Dependency service resolution period

Author: jandro996

dd-trace-api/src/main/java/datadog/trace/api/config/AppSecConfig.java

@@ -36,5 +36,8 @@ public final class AppSecConfig {
 
   public static final String APPSEC_STANDALONE_ENABLED = "experimental.appsec.standalone.enabled";
 
+  public static final String APPSEC_DEPENDENCY_RESOLUTION_PERIOD_MILLIS =
+      "appsec.dependency.resolution.period.millis";
+
   private AppSecConfig() {}
 }

internal-api/src/main/java/datadog/trace/api/Config.java

@@ -24,6 +24,7 @@
 import static datadog.trace.util.Strings.propertyNameToEnvironmentVariableName;
 
 import datadog.trace.api.civisibility.CiVisibilityWellKnownTags;
+import datadog.trace.api.config.AppSecConfig;
 import datadog.trace.api.config.GeneralConfig;
 import datadog.trace.api.config.ProfilingConfig;
 import datadog.trace.api.config.TracerConfig;
@@ -536,6 +537,8 @@ public static String getHostName() {
   private final int cloudPayloadTaggingMaxDepth;
   private final int cloudPayloadTaggingMaxTags;
 
+  private final long dependecyResolutionPeriodMillis;
+
   // Read order: System Properties -> Env Variables, [-> properties file], [-> default value]
   private Config() {
     this(ConfigProvider.createDefault());
@@ -1792,6 +1795,10 @@ PROFILING_DATADOG_PROFILER_ENABLED, isDatadogProfilerSafeInCurrentEnvironment())
     this.cloudPayloadTaggingMaxTags =
         configProvider.getInteger(TracerConfig.TRACE_CLOUD_PAYLOAD_TAGGING_MAX_TAGS, 758);
 
+    this.dependecyResolutionPeriodMillis =
+        configProvider.getLong(
+            AppSecConfig.APPSEC_DEPENDENCY_RESOLUTION_PERIOD_MILLIS, 1000); // 1 second by default
+
     timelineEventsEnabled =
         configProvider.getBoolean(
             ProfilingConfig.PROFILING_TIMELINE_EVENTS_ENABLED,
@@ -3686,6 +3693,10 @@ public boolean isEnabled(
         Collections.singletonList(settingName), "", settingSuffix, defaultEnabled);
   }
 
+  public long getDependecyResolutionPeriodMillis() {
+    return dependecyResolutionPeriodMillis;
+  }
+
   public String getDBMPropagationMode() {
     return DBMPropagationMode;
   }

telemetry/src/main/java/datadog/telemetry/dependency/DependencyService.java

@@ -1,5 +1,6 @@
 package datadog.telemetry.dependency;
 
+import datadog.trace.api.Config;
 import datadog.trace.util.AgentTaskScheduler;
 import java.lang.instrument.Instrumentation;
 import java.net.URI;
@@ -31,7 +32,11 @@ public class DependencyService implements Runnable {
   public void schedulePeriodicResolution() {
     scheduledTask =
         AgentTaskScheduler.INSTANCE.scheduleAtFixedRate(
-            AgentTaskScheduler.RunnableTask.INSTANCE, this, 0, 1000L, TimeUnit.MILLISECONDS);
+            AgentTaskScheduler.RunnableTask.INSTANCE,
+            this,
+            0,
+            Config.get().getDependecyResolutionPeriodMillis(),
+            TimeUnit.MILLISECONDS);
   }
 
   public void resolveOneDependency() {