Github user zentol commented on a diff in the pull request:
https://github.com/apache/flink/pull/4603#discussion_r139415579
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/rest/handler/LegacyRestHandler.java
---
@@ -0,0 +1,40 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.flink.runtime.rest.handler;
+
+import org.apache.flink.runtime.rest.messages.LegacyRequest;
+import org.apache.flink.runtime.rest.messages.MessageParameters;
+import org.apache.flink.runtime.rest.messages.ResponseBody;
+import org.apache.flink.runtime.webmonitor.RestfulGateway;
+
+import java.util.concurrent.CompletableFuture;
+
+/**
+ * Interface which Flink's legacy REST handler have to implement in order
to bu usable
+ * via the {@link LegacyRestHandlerAdapter}.
+ *
+ * @param <T> type of the gateway
+ * @param <R> type of the REST response
+ */
+public interface LegacyRestHandler<T extends RestfulGateway, R extends
ResponseBody, M extends MessageParameters> {
+
+ CompletableFuture<R> handleRequest(HandlerRequest<LegacyRequest, M>
request, T gateway);
+
+ String[] getPaths();
--- End diff --
I don't think we'll need this anymore, as this should be subsumed by the
message headers.
---
