net.simonvt.cathode.api.RetryingInterceptor.java Source code

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Here is the source code for net.simonvt.cathode.api.RetryingInterceptor.java

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/*
 * Copyright (C) 2015 Simon Vig Therkildsen
 *
 * 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 net.simonvt.cathode.api;

import com.squareup.okhttp.Interceptor;
import com.squareup.okhttp.Request;
import com.squareup.okhttp.Response;
import java.io.IOException;
import timber.log.Timber;

public class RetryingInterceptor implements Interceptor {

    private final int maxRetryCount;

    private final long retryDelay;

    public RetryingInterceptor(int maxRetryCount, long retryDelay) {
        this.maxRetryCount = maxRetryCount;
        this.retryDelay = retryDelay;
    }

    @Override
    public Response intercept(Chain chain) throws IOException {
        Request request = chain.request();
        return proceed(chain, request);
    }

    private Response proceed(Chain chain, Request request) throws IOException {
        return proceed(chain, request, 0);
    }

    private Response proceed(Chain chain, Request request, int retryCount) throws IOException {
        if (retryCount > 0 && retryDelay > 0) {
            Timber.d("Retrying request in %d milliseconds", retryDelay);
            try {
                Thread.sleep(retryDelay);
            } catch (InterruptedException e) {
                // Ignore
            }
        }
        Response response;
        try {
            response = chain.proceed(request);
            if (!response.isSuccessful()) {
                if (retryCount < maxRetryCount) {
                    response = proceed(chain, request, retryCount + 1);
                }
            }
        } catch (IOException e) {
            if (retryCount < maxRetryCount) {
                response = proceed(chain, request, retryCount + 1);
            } else {
                throw e;
            }
        }

        return response;
    }
}