ca.ualberta.cmput301w14t08.geochan.runnables.GetImageRunnable.java Source code

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Here is the source code for ca.ualberta.cmput301w14t08.geochan.runnables.GetImageRunnable.java

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/*
 * Copyright 2014 Artem Chikin
 * Copyright 2014 Artem Herasymchuk
 * Copyright 2014 Tom Krywitsky
 * Copyright 2014 Henry Pabst
 * Copyright 2014 Bradley Simons
 * 
 * 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 ca.ualberta.cmput301w14t08.geochan.runnables;

import io.searchbox.client.JestResult;
import io.searchbox.core.Get;

import java.lang.reflect.Type;

import android.graphics.Bitmap;
import ca.ualberta.cmput301w14t08.geochan.helpers.ElasticSearchClient;
import ca.ualberta.cmput301w14t08.geochan.helpers.GsonHelper;
import ca.ualberta.cmput301w14t08.geochan.models.ElasticSearchResponse;
import ca.ualberta.cmput301w14t08.geochan.tasks.GetImageTask;

import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;

/**
 * Runnable for retrieving a bitmap object in a separate thread of execution from
 * ElasticSearch. 
 * 
 * @author Artem Chikin
 *
 */
public class GetImageRunnable implements Runnable {

    private GetImageTask task;
    private String type = ElasticSearchClient.TYPE_IMAGE;
    public static final int STATE_GET_IMAGE_FAILED = -1;
    public static final int STATE_GET_IMAGE_RUNNING = 0;
    public static final int STATE_GET_IMAGE_COMPLETE = 1;

    public GetImageRunnable(GetImageTask task) {
        this.task = task;
    }

    /**
     * Forms a query and sends a get request to ES,
     * then processes retrieved data as a bitmap and
     * sends it to the task's cache.
     */
    @Override
    public void run() {
        task.setGetImageThread(Thread.currentThread());
        android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_BACKGROUND);
        task.handleGetImageState(STATE_GET_IMAGE_RUNNING);
        JestResult result = null;
        try {
            if (Thread.interrupted()) {
                throw new InterruptedException();
            }

            Get get = new Get.Builder(ElasticSearchClient.URL_INDEX, task.getId()).type(type).build();
            result = ElasticSearchClient.getInstance().getClient().execute(get);

            Type type = new TypeToken<ElasticSearchResponse<Bitmap>>() {
            }.getType();
            Gson gson = GsonHelper.getOnlineGson();
            ElasticSearchResponse<Bitmap> esResponse = gson.fromJson(result.getJsonString(), type);

            if (Thread.interrupted()) {
                throw new InterruptedException();
            }

            task.setImageCache(esResponse.getSource());
            task.handleGetImageState(STATE_GET_IMAGE_COMPLETE);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (result == null || !result.isSucceeded()) {
                task.handleGetImageState(STATE_GET_IMAGE_FAILED);
            }
            // task.setGetImageThread(null);
            Thread.interrupted();
        }

    }

}