| /* |
| * 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.cassandra.sidecar.client.retry; |
| |
| import java.util.concurrent.CompletableFuture; |
| |
| import io.netty.handler.codec.http.HttpResponseStatus; |
| import org.apache.cassandra.sidecar.client.HttpResponse; |
| import org.apache.cassandra.sidecar.client.exception.RetriesExhaustedException; |
| import org.apache.cassandra.sidecar.client.request.Request; |
| |
| /** |
| * A retry policy that attempts to execute the request once on each instance |
| * until the first successful response is received, or fails if none were successful |
| */ |
| public class OncePerInstanceRetryPolicy extends RetryPolicy |
| { |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public void onResponse(CompletableFuture<HttpResponse> responseFuture, |
| Request request, |
| HttpResponse response, |
| Throwable throwable, |
| int attempts, |
| boolean canRetryOnADifferentHost, |
| RetryAction retryAction) |
| { |
| if (response != null && response.statusCode() == HttpResponseStatus.OK.code()) |
| { |
| responseFuture.complete(response); |
| } |
| else if (canRetryOnADifferentHost) |
| { |
| retryAction.retry(attempts + 1, 0L); |
| } |
| else |
| { |
| responseFuture.completeExceptionally(RetriesExhaustedException.of(attempts, request, response, throwable)); |
| } |
| } |
| } |