Remove use of finalizer

1 files changed, 6 insertions, 8 deletions

diff --git a/documentapi/src/main/java/com/yahoo/documentapi/messagebus/protocol/ExternPolicy.java b/documentapi/src/main/java/com/yahoo/documentapi/messagebus/protocol/ExternPolicy.java
index 5a68e5bda2a..e60fb128d29 100755
--- a/documentapi/src/main/java/com/yahoo/documentapi/messagebus/protocol/ExternPolicy.java
+++ b/documentapi/src/main/java/com/yahoo/documentapi/messagebus/protocol/ExternPolicy.java
@@ -13,6 +13,7 @@ import com.yahoo.messagebus.routing.RoutingContext;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.concurrent.atomic.AtomicBoolean;
 
 /**
  * This policy implements the necessary logic to communicate with an external Vespa application and resolve its list of
@@ -30,6 +31,7 @@ public class ExternPolicy implements DocumentProtocolRoutingPolicy {
     private int offset = 0;
     private int generation = 0;
     private final List<Hop> recipients = new ArrayList<>();
+    private final AtomicBoolean destroyed = new AtomicBoolean(false);
 
     /**
      * Constructs a new instance of this policy. The argument given is the connection spec to the slobrok to use for
@@ -109,14 +111,6 @@ public class ExternPolicy implements DocumentProtocolRoutingPolicy {
         }
     }
 
-    @Override
-    @SuppressWarnings("deprecation")  // finalize() is deprecated from Java 9
-    public void finalize() throws Throwable {
-        super.finalize();
-        mirror.shutdown();
-        orb.transport().shutdown().join();
-    }
-
     public void select(RoutingContext ctx) {
         if (error != null) {
             ctx.setError(DocumentProtocol.ERROR_POLICY_FAILURE, error);
@@ -139,7 +133,11 @@ public class ExternPolicy implements DocumentProtocolRoutingPolicy {
         DocumentProtocol.merge(ctx);
     }
 
+    @Override
     public void destroy() {
+        if (destroyed.getAndSet(true)) throw new RuntimeException("Already destroyed");
+        mirror.shutdown();
+        orb.transport().shutdown().join();
     }
 
     public MetricSet getMetrics() {