com.hippoapp.asyncmvp.http.RetryHandler.java Source code

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Here is the source code for com.hippoapp.asyncmvp.http.RetryHandler.java

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/*
 * Copyright (C) 2010-2011 Bnet.inc (http://bnet.su)
 *
 * This file is part of AsyncMvp.
 *
 * AsyncMvp is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * AsyncMvp is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with AsyncMvp.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.hippoapp.asyncmvp.http;

import java.io.IOException;
import java.io.InterruptedIOException;
import java.net.UnknownHostException;
import java.util.HashSet;
import java.util.Set;

import org.apache.http.client.HttpRequestRetryHandler;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.protocol.ExecutionContext;
import org.apache.http.protocol.HttpContext;

import android.os.SystemClock;

/** package */
class RetryHandler implements HttpRequestRetryHandler {
    private static final int RETRY_SLEEP_TIME_IN_MILLS = 1500;

    private static Set<Class<? extends Exception>> sRetriedExceptionSet = new HashSet<Class<? extends Exception>>();
    private static Set<Class<? extends Exception>> sUnretriedExceptionSet = new HashSet<Class<? extends Exception>>();

    static {
        // retry-this, since it may happens as part of a Wi-Fi to 3G failover
        sRetriedExceptionSet.add(UnknownHostException.class);

        // never retry timeouts
        sUnretriedExceptionSet.add(InterruptedIOException.class);
    }
    private static final int DEFAULT_MAX_RETRIES = 5;

    @Override
    public boolean retryRequest(IOException exception, int executionCount, HttpContext context) {
        boolean retry;

        Boolean b = (Boolean) context.getAttribute(ExecutionContext.HTTP_REQ_SENT);
        boolean sent = (b != null && b.booleanValue());

        if (executionCount > DEFAULT_MAX_RETRIES) {
            retry = false;
        } else if (sUnretriedExceptionSet.contains(exception.getClass())) {
            retry = false;
        } else if (sRetriedExceptionSet.contains(exception.getClass())) {
            retry = true;
        } else if (!sent) {
            // for most other errors, retry only if request hasn't been fully
            // sent yet
            retry = true;
        } else {
            // resend all idempotent requests
            HttpUriRequest currentReq = (HttpUriRequest) context.getAttribute(ExecutionContext.HTTP_REQUEST);
            String requestType = currentReq.getMethod();
            if (!requestType.equals("POST")) {
                retry = true;
            } else {
                // otherwise do not retry
                retry = false;
            }
        }

        if (retry) {
            SystemClock.sleep(RETRY_SLEEP_TIME_IN_MILLS);
        } else {
            exception.printStackTrace();
        }

        return retry;
    }
}