reactivefeign.publisher.retry.RetryPublisherHttpClient Maven / Gradle / Ivy

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/**
 * Copyright 2018 The Feign Authors
 *
 * Licensed 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 reactivefeign.publisher.retry;

import feign.ExceptionPropagationPolicy;
import feign.MethodMetadata;
import org.reactivestreams.Publisher;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import reactivefeign.client.ReactiveFeignException;
import reactivefeign.client.ReactiveHttpRequest;
import reactivefeign.publisher.PublisherHttpClient;
import reactivefeign.retry.ReactiveRetryPolicy;
import reactor.core.Exceptions;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
import reactor.util.retry.Retry;


/**
 * Wraps {@link PublisherHttpClient} with retry logic provided by retryFunction
 *
 * @author Sergii Karpenko
 */
abstract public class RetryPublisherHttpClient implements PublisherHttpClient {

    private static final Logger logger = LoggerFactory.getLogger(RetryPublisherHttpClient.class);

    protected final String feignMethodKey;
    protected final PublisherHttpClient publisherClient;
    private final Retry retry;
    private final ReactiveRetryPolicy retryPolicy;

    private final ExceptionPropagationPolicy exceptionPropagationPolicy;

    protected RetryPublisherHttpClient(
            PublisherHttpClient publisherClient,
            MethodMetadata methodMetadata,
            ReactiveRetryPolicy retryPolicy) {

        this.publisherClient = publisherClient;
        this.feignMethodKey = methodMetadata.configKey();
        this.retry = wrapWithRetryLog(retryPolicy.retry(), feignMethodKey);
        this.exceptionPropagationPolicy = retryPolicy.exceptionPropagationPolicy();
        this.retryPolicy = retryPolicy;
    }

    protected Retry getRetry(ReactiveHttpRequest request){
        return wrapWithOutOfRetriesLog(request);
    }

    private Retry wrapWithOutOfRetriesLog(ReactiveHttpRequest request) {
        return new Retry() {
            @Override
            public Publisher generateCompanion(Flux retrySignals) {
                return Flux.