001/**
002 * Copyright (C) 2014  Universidade de Aveiro, DETI/IEETA, Bioinformatics Group - http://bioinformatics.ua.pt/
003 *
004 * This file is part of Dicoogle/dicoogle.
005 *
006 * Dicoogle/dicoogle is free software: you can redistribute it and/or modify
007 * it under the terms of the GNU General Public License as published by
008 * the Free Software Foundation, either version 3 of the License, or
009 * (at your option) any later version.
010 *
011 * Dicoogle/dicoogle is distributed in the hope that it will be useful,
012 * but WITHOUT ANY WARRANTY; without even the implied warranty of
013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
014 * GNU General Public License for more details.
015 *
016 * You should have received a copy of the GNU General Public License
017 * along with Dicoogle.  If not, see <http://www.gnu.org/licenses/>.
018 */
019package pt.ua.dicoogle.taskManager;
020
021import java.util.HashMap;
022import java.util.Iterator;
023import java.util.Map;
024import java.util.concurrent.ExecutionException;
025
026import net.sf.json.JSONArray;
027import net.sf.json.JSONObject;
028import org.slf4j.Logger;
029import org.slf4j.LoggerFactory;
030import pt.ua.dicoogle.sdk.datastructs.IndexReport;
031import pt.ua.dicoogle.sdk.datastructs.Report;
032import pt.ua.dicoogle.sdk.task.Task;
033
034/**
035 * Singleton that contains all running index tasks
036 *
037 * @author Frederico Silva <fredericosilva@ua.pt>
038 * @author Eduardo Pinho <eduardopinho@ua.pt>
039 */
040public class RunningIndexTasks {
041    private static final Logger logger = LoggerFactory.getLogger(RunningIndexTasks.class);
042    
043        public static RunningIndexTasks instance;
044
045        private final Map<String, Task<Report>> taskRunningList;
046
047        public static RunningIndexTasks getInstance() {
048                if (instance == null)
049                        instance = new RunningIndexTasks();
050
051                return instance;
052        }
053
054        public RunningIndexTasks() {
055                taskRunningList = new HashMap<>();
056        }
057
058        public void addTask(String taskUid, Task<Report> task) {
059                taskRunningList.put(taskUid, task);
060        }
061
062        public boolean removeTask(String taskUid) {
063                return taskRunningList.remove(taskUid) != null;
064        }
065
066        public boolean stopTask(String taskUid) {
067                Task<Report> task = taskRunningList.get(taskUid);
068                if (task != null) {
069                        return task.cancel(true);
070                } else {
071                        logger.info("Attempt to stop unexistent task {}, ignoring", taskUid);
072                }
073
074                return false;
075        }
076
077        public Map<String, Task<Report>> getRunningTasks() {
078
079                return taskRunningList;
080        }
081
082    public String toJson() {
083        JSONObject object = new JSONObject();
084        JSONArray array = new JSONArray();
085
086        int countComplete = 0;
087        int countCancelled = 0;
088        for (Map.Entry<String, Task<Report>> pair : taskRunningList.entrySet()) {
089            Task<Report> task = pair.getValue();
090            JSONObject entry = new JSONObject();
091            entry.put("taskUid", pair.getKey());
092            entry.put("taskName", task.getName());
093            entry.put("taskProgress", task.getProgress());
094
095            if (task.isDone() && !task.isCancelled()) {
096                entry.put("complete", true);
097                countComplete += 1;
098                try {
099                    Report r = task.get();
100                    if (r instanceof IndexReport) {
101                        entry.put("elapsedTime", ((IndexReport)r).getElapsedTime());
102                        entry.put("nIndexed", ((IndexReport)r).getNIndexed());
103                        entry.put("nErrors", ((IndexReport)r).getNErrors());
104                    }
105                } catch (InterruptedException | ExecutionException ex) {
106                    logger.warn("Could not retrieve task result, ignoring", ex);
107                }
108            }
109            if (task.isCancelled()) {
110                countCancelled += 1;
111                entry.put("canceled", true);
112            }
113            array.add(entry);
114        }
115
116        object.put("results", array);
117        object.put("count", array.size() - countComplete - countCancelled);
118        return object.toString();
119    }
120}