COH-29603 -Add options to each of the TracingShimLoader implementations (OpenTracing and OTel) to disable one of them in case both runtimes are available on the classpath (merge main -> ce/main @ 108073)

[git-p4: depot-paths = "//dev/coherence-ce/main/": change = 108117]

Author: rlubke

prj/coherence-tracing/opentelemetry/src/main/java/com/tangosol/internal/tracing/opentelemetry/OpenTelemetryShimLoader.java

@@ -8,6 +8,7 @@
 
 import com.oracle.coherence.common.base.Logger;
 
+import com.tangosol.coherence.config.Config;
 import com.tangosol.internal.tracing.TracingShim;
 import com.tangosol.internal.tracing.TracingShimLoader;
 
@@ -40,7 +41,14 @@ public class OpenTelemetryShimLoader
     @Override
     public TracingShim loadTracingShim()
         {
-        return ensureDependenciesPresent() ? new OpenTelemetryShim() : TracingShim.Noop.INSTANCE;
+        if (ENABLED)
+            {
+            return ensureDependenciesPresent()
+                   ? new OpenTelemetryShim()
+                   : TracingShim.Noop.INSTANCE;
+            }
+
+        return null;
         }
 
     // ----- helper methods -------------------------------------------------
@@ -113,6 +121,12 @@ protected boolean ensureClassPresent(String sClassName, ClassLoader classLoader)
             "io.opentelemetry.context.Context",      "opentelemetry-context",
             "io.opentelemetry.sdk.OpenTelemetrySdk", "opentracing-util");
 
+    /**
+     * A flag that allows the explicit disabling of OpenTelemetry.
+     */
+    protected static final boolean ENABLED =
+            Config.getBoolean("com.oracle.coherence.opentelemetry.enabled", true);
+
     // ----- inner class: Noops ---------------------------------------------
     /**
      * Utility class for determining what OpenTelemetry types are Noop types.

prj/coherence-tracing/opentracing/src/main/java/com/tangosol/internal/tracing/opentracing/OpenTracingShimLoader.java

@@ -8,6 +8,7 @@
 
 import com.oracle.coherence.common.base.Logger;
 
+import com.tangosol.coherence.config.Config;
 import com.tangosol.internal.tracing.TracingShim;
 import com.tangosol.internal.tracing.TracingShimLoader;
 
@@ -35,7 +36,14 @@ public class OpenTracingShimLoader
     @Override
     public TracingShim loadTracingShim()
         {
-        return ensureDependenciesPresent() ? new OpenTracingShim() : TracingShim.Noop.INSTANCE;
+        if (ENABLED)
+            {
+            return ensureDependenciesPresent()
+                   ? new OpenTracingShim()
+                   : TracingShim.Noop.INSTANCE;
+            }
+
+        return null;
         }
 
     // ----- helper methods -------------------------------------------------
@@ -129,4 +137,10 @@ protected boolean ensureClassPresent(String sClassName, ClassLoader classLoader)
                     put("io.opentracing.contrib.tracerresolver.TracerResolver", "opentracing-tracerresolver");
                     }
                 });
+
+    /**
+     * A flag that allows the explicit disabling of OpenTracing.
+     */
+    protected static final boolean ENABLED =
+            Config.getBoolean("com.oracle.coherence.opentracing.enabled", true);
     }