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

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Here is the source code for com.hippoapp.asyncmvp.http.AsyncCachedHttpRequest.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.net.ConnectException;

import org.apache.http.HttpResponse;
import org.apache.http.StatusLine;
import org.apache.http.client.HttpRequestRetryHandler;
import org.apache.http.client.HttpResponseException;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.impl.client.AbstractHttpClient;
import org.apache.http.protocol.HttpContext;
import org.apache.http.util.EntityUtils;

import android.os.Parcelable;

import com.hippoapp.asyncmvp.cache.AsyncCacheClient;
import com.hippoapp.asyncmvp.cache.ResponseData;

/** package */
class AsyncCachedHttpRequest implements Runnable {
    private static final String TAG = AsyncCachedHttpRequest.class.getSimpleName();

    private AbstractHttpClient client;

    private HttpContext context;

    private HttpUriRequest request;

    private IAsyncHttpResponseHandler responseHandler;

    private int executionCount;

    private int protocol;

    private String cacheId;
    private int cacheProtocol;

    public AsyncCachedHttpRequest(AbstractHttpClient client, HttpContext context, HttpUriRequest request,
            IAsyncHttpResponseHandler responseHandler, int protocol, int cacheProtocol, String cacheId) {
        this.client = client;
        this.context = context;
        this.request = request;

        this.responseHandler = responseHandler;
        this.protocol = protocol;

        this.cacheProtocol = cacheProtocol;
        this.cacheId = cacheId;

    }

    @Override
    public void run() {
        if (responseHandler != null) {
            try {
                responseHandler.onStart(protocol);
                Parcelable parcelable = null;
                try {
                    parcelable = AsyncCacheClient.getInstance().get(cacheProtocol, cacheId);
                } catch (NullPointerException e) {
                    // no cache
                }
                if (parcelable != null) {
                    responseHandler.onSuccess(protocol, ((ResponseData) parcelable).getResponseBody());
                } else {
                    makeRequestWithRetries();
                }

            } catch (IOException e) {
                responseHandler.onFailure(protocol, e);
            }
            responseHandler.onFinish(protocol);
        }
    }

    private void makeRequestWithRetries() throws ConnectException {
        boolean retry = true;
        IOException cause = null;
        HttpRequestRetryHandler retryHandler = client.getHttpRequestRetryHandler();
        while (retry) {
            try {
                makeRequest();
                return;
            } catch (IOException e) {
                cause = e;
                retry = retryHandler.retryRequest(cause, ++executionCount, context);
            } catch (NullPointerException e) {
                // http://code.google.com/p/android/issues/detail?id=5255
                cause = new IOException("NPE in HttpClient" + e.getMessage());
                retry = retryHandler.retryRequest(cause, ++executionCount, context);
            }
        }

        ConnectException ex = new ConnectException();
        ex.initCause(cause);
        throw ex;
    }

    private void makeRequest() throws IOException {
        HttpResponse response = client.execute(request, context);

        StatusLine status = response.getStatusLine();
        if (status.getStatusCode() >= 300) {
            responseHandler.onFailure(protocol,
                    new HttpResponseException(status.getStatusCode(), status.getReasonPhrase()));
        } else {
            byte[] httpResponseByte = EntityUtils.toByteArray(response.getEntity());
            // add to cache
            ResponseData responseData = new ResponseData(status.getStatusCode(), httpResponseByte);
            try {
                AsyncCacheClient.getInstance().put(cacheProtocol, cacheId, responseData);
            } catch (NullPointerException e) {
                // no cache
            }
            responseHandler.onSuccess(protocol, httpResponseByte);
        }
    }
}