Move UNSET_PORT constant to BaseDecorator (#10599)

Move UNSET_PORT constant to BaseDecorator

Co-authored-by: stuart.mcculloch <stuart.mcculloch@datadoghq.com>

Author: mcculls

dd-java-agent/agent-bootstrap/src/main/java/datadog/trace/bootstrap/instrumentation/decorator/BaseDecorator.java

@@ -1,6 +1,5 @@
 package datadog.trace.bootstrap.instrumentation.decorator;
 
-import static datadog.trace.api.cache.RadixTreeCache.UNSET_PORT;
 import static datadog.trace.bootstrap.instrumentation.java.net.HostNameResolver.hostName;
 
 import datadog.context.Context;
@@ -22,6 +21,7 @@
 import java.util.function.Function;
 
 public abstract class BaseDecorator {
+  protected static final int UNSET_PORT = 0;
 
   private static final QualifiedClassNameCache CLASS_NAMES =
       new QualifiedClassNameCache(

dd-java-agent/agent-bootstrap/src/main/java/datadog/trace/bootstrap/instrumentation/decorator/HttpServerDecorator.java

@@ -56,7 +56,6 @@ public abstract class HttpServerDecorator<REQUEST, CONNECTION, RESPONSE, REQUEST
     extends ServerDecorator {
 
   private static final Logger log = LoggerFactory.getLogger(HttpServerDecorator.class);
-  private static final int UNSET_PORT = 0;
 
   public static final String DD_CONTEXT_ATTRIBUTE = "datadog.context";
   public static final String DD_DISPATCH_SPAN_ATTRIBUTE = "datadog.span.dispatch";

dd-java-agent/instrumentation/synapse-3.0/src/main/java/datadog/trace/instrumentation/synapse3/SynapseServerDecorator.java

@@ -1,6 +1,5 @@
 package datadog.trace.instrumentation.synapse3;
 
-import static datadog.trace.api.cache.RadixTreeCache.UNSET_PORT;
 import static datadog.trace.api.cache.RadixTreeCache.UNSET_STATUS;
 import static datadog.trace.instrumentation.synapse3.ExtractAdapter.Request;
 import static datadog.trace.instrumentation.synapse3.ExtractAdapter.Response;

internal-api/src/main/java/datadog/trace/api/cache/RadixTreeCache.java

@@ -18,8 +18,6 @@ public final class RadixTreeCache<T> {
       new RadixTreeCache<>(
           16, 32, TO_STRING, 200, 201, 301, 307, 400, 401, 403, 404, 500, 502, 503);
 
-  public static final int UNSET_PORT = 0;
-
   private final int level1;
   private final int level2;
   private final int shift;