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

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Here is the source code for ca.ualberta.cmput301w14t08.geochan.runnables.GetThreadCommentsRunnable.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.Search;

import java.lang.reflect.Type;
import java.util.ArrayList;

import ca.ualberta.cmput301w14t08.geochan.helpers.ElasticSearchClient;
import ca.ualberta.cmput301w14t08.geochan.helpers.ElasticSearchQueries;
import ca.ualberta.cmput301w14t08.geochan.helpers.GsonHelper;
import ca.ualberta.cmput301w14t08.geochan.models.ElasticSearchResponse;
import ca.ualberta.cmput301w14t08.geochan.models.ElasticSearchSearchResponse;
import ca.ualberta.cmput301w14t08.geochan.models.ThreadComment;
import ca.ualberta.cmput301w14t08.geochan.models.ThreadList;
import ca.ualberta.cmput301w14t08.geochan.tasks.GetThreadCommentsTask;

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

/**
 * Runnable for retrieving a ThreadComment objects in a separate thread of execution from
 * ElasticSearch. 
 * 
 * @author Artem Herasymchuk
 *
 */
public class GetThreadCommentsRunnable implements Runnable {
    private GetThreadCommentsTask task;
    private String type = ElasticSearchClient.TYPE_THREAD;
    public static final int STATE_GET_THREADS_FAILED = -1;
    public static final int STATE_GET_THREADS_RUNNING = 0;
    public static final int STATE_GET_THREADS_COMPLETE = 1;

    public GetThreadCommentsRunnable(GetThreadCommentsTask task) {
        this.task = task;
    }

    /**
     * Forms a query and sends a Get request to ES, then processes
     * retrieved data as an array of ThreadComment objects.
     */
    @Override
    public void run() {
        task.setGetThreadCommentsThread(Thread.currentThread());
        android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_BACKGROUND);
        task.handleGetThreadCommentsState(STATE_GET_THREADS_RUNNING);
        JestResult result = null;
        try {
            if (Thread.interrupted()) {
                throw new InterruptedException();
            }
            String query = ElasticSearchQueries.SEARCH_MATCH_ALL;
            Search search = new Search.Builder(query).addIndex(ElasticSearchClient.URL_INDEX).addType(type).build();
            result = ElasticSearchClient.getInstance().getClient().execute(search);
            if (Thread.interrupted()) {
                throw new InterruptedException();
            }
            Type elasticSearchSearchResponseType = new TypeToken<ElasticSearchSearchResponse<ThreadComment>>() {
            }.getType();
            Gson gson = GsonHelper.getOnlineGson();
            ElasticSearchSearchResponse<ThreadComment> esResponse = gson.fromJson(result.getJsonString(),
                    elasticSearchSearchResponseType);
            if (Thread.interrupted()) {
                throw new InterruptedException();
            }
            ArrayList<ThreadComment> list = new ArrayList<ThreadComment>();
            for (ElasticSearchResponse<ThreadComment> r : esResponse.getHits()) {
                ThreadComment object = r.getSource();
                list.add(object);
            }
            if (Thread.interrupted()) {
                throw new InterruptedException();
            }
            ThreadList.setThreads(list);
            task.handleGetThreadCommentsState(STATE_GET_THREADS_COMPLETE);
        } catch (Exception e) {
            //
        } finally {
            if (result == null || !result.isSucceeded()) {
                task.handleGetThreadCommentsState(STATE_GET_THREADS_FAILED);
            }
            // task.setGetCommentListThread(null);
            Thread.interrupted();
        }
    }
}