Extend from AbstractHandlerContainer instead of AbstractHandler (drop…

…wizard#2460)

(cherry picked from commit 5a78323)

dropwizard-jetty/src/main/java/io/dropwizard/jetty/ContextRoutingHandler.java

@@ -2,9 +2,8 @@
 
 import org.eclipse.jetty.server.Handler;
 import org.eclipse.jetty.server.Request;
-import org.eclipse.jetty.server.handler.AbstractHandler;
+import org.eclipse.jetty.server.handler.AbstractHandlerContainer;
 import org.eclipse.jetty.util.ArrayTernaryTrie;
-import org.eclipse.jetty.util.Trie;
 
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
@@ -15,8 +14,8 @@
 /**
  * A Jetty router which routes requests based on context path.
  */
-public class ContextRoutingHandler extends AbstractHandler {
-    private final Trie<Handler> handlers;
+public class ContextRoutingHandler extends AbstractHandlerContainer {
+    private final ArrayTernaryTrie<Handler> handlers;
 
     public ContextRoutingHandler(Map<String, ? extends Handler> handlers) {
         this.handlers = new ArrayTernaryTrie<>(false);
@@ -38,4 +37,25 @@ public void handle(String target,
             handler.handle(target, baseRequest, request, response);
         }
     }
+
+    @Override
+    protected void doStart() throws Exception {
+        super.doStart();
+        for (String key : handlers.keySet()) {
+            handlers.get(key).start();
+        }
+    }
+
+    @Override
+    protected void doStop() throws Exception {
+        super.doStop();
+        for (String key : handlers.keySet()) {
+            handlers.get(key).stop();
+        }
+    }
+
+    @Override
+    public Handler[] getHandlers() {
+        return handlers.entrySet().stream().map(Map.Entry::getValue).toArray(Handler[]::new);
+    }
 }