creating new feature flag for breaking changes

Author: mhlidd

dd-trace-api/src/main/java/datadog/trace/api/ConfigDefaults.java

@@ -101,6 +101,8 @@ public final class ConfigDefaults {
 
   static final boolean DEFAULT_LOGS_INJECTION_ENABLED = true;
 
+  static final boolean DEFAULT_BREAKING_CHANGES_ENABLED = true;
+
   static final String DEFAULT_APPSEC_ENABLED = "inactive";
   static final boolean DEFAULT_APPSEC_REPORTING_INBAND = false;
   static final int DEFAULT_APPSEC_TRACE_RATE_LIMIT = 100;

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

@@ -88,6 +88,8 @@ public final class TraceInstrumentationConfig {
   public static final String LOGS_INJECTION_ENABLED = "logs.injection.enabled";
   public static final String LOGS_INJECTION = "logs.injection";
 
+  public static final String BREAKING_CHANGES_ENABLED = "breaking.changes.enabled";
+
   public static final String TRACE_128_BIT_TRACEID_LOGGING_ENABLED =
       "trace.128.bit.traceid.logging.enabled";
 

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

@@ -192,6 +192,7 @@ public static String getHostName() {
   private final boolean tracePropagationExtractFirst;
   private final int clockSyncPeriod;
   private final boolean logsInjectionEnabled;
+  private final boolean breakingChangesEnabled;
 
   private final String dogStatsDNamedPipe;
   private final int dogStatsDStartDelay;
@@ -1007,6 +1008,9 @@ private Config(final ConfigProvider configProvider, final InstrumenterConfig ins
         configProvider.getBoolean(
             LOGS_INJECTION_ENABLED, DEFAULT_LOGS_INJECTION_ENABLED, LOGS_INJECTION);
 
+    breakingChangesEnabled =
+        configProvider.getBoolean(BREAKING_CHANGES_ENABLED, DEFAULT_BREAKING_CHANGES_ENABLED);
+
     dogStatsDNamedPipe = configProvider.getString(DOGSTATSD_NAMED_PIPE);
 
     dogStatsDStartDelay =
@@ -2352,6 +2356,10 @@ public boolean isLogsInjectionEnabled() {
     return logsInjectionEnabled;
   }
 
+  public boolean isBreakingChangesEnabled() {
+    return breakingChangesEnabled;
+  }
+
   public boolean isReportHostName() {
     return reportHostName;
   }
@@ -4656,6 +4664,8 @@ public String toString() {
         + injectBaggageAsTagsEnabled
         + ", logsInjectionEnabled="
         + logsInjectionEnabled
+        + ", breakingChangesEnabled="
+        + breakingChangesEnabled
         + ", sparkTaskHistogramEnabled="
         + sparkTaskHistogramEnabled
         + ", sparkAppNameAsService="