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package dk.daoas.adressevedligehold.tasks;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.HashMap;
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import java.util.List;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.Executors;
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import dk.daoas.adressevedligehold.tasks.Task.TaskBean;
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import dk.daoas.adressevedligehold.tasks.Task.TaskState;
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public class TaskManager {
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public static final String TASKMANAGER = "TASKMANAGER";
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ExecutorService executor = Executors.newSingleThreadExecutor();
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private int nextId = 1;
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private ArrayList<Task> tasks = new ArrayList<Task>();
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private HashMap<Integer, Task> taskIdMap = new HashMap<Integer,Task>();
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private Task currentTask;
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public List<TaskBean> getTasks() {
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ArrayList<TaskBean> tmpList = new ArrayList<TaskBean>();
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synchronized(this) {
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for (Task t : tasks) {
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tmpList.add( t.getTaskBean() );
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}
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}
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Collections.reverse(tmpList);
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return tmpList;
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}
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public void setCurrentTask(Task task) {
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this.currentTask = task;
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}
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public Task getCurrentTask() {
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return this.currentTask;
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}
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public Task getTaskById(int id) {
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return taskIdMap.get(id);
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}
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void shutDown() {
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if (currentTask != null) {
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currentTask.doAbort();
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}
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executor.shutdownNow();
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}
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public synchronized void removeTask(Task removeTask) {
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if (removeTask.state == TaskState.STATE_QUEUED) {
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removeTask.doAbort();
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}
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if (removeTask.state == TaskState.STATE_ABORTED || removeTask.state == TaskState.STATE_DONE || removeTask.state == TaskState.STATE_QUEUED) {
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taskIdMap.remove( removeTask.getId() );
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tasks.remove(removeTask);
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return;
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}
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throw new RuntimeException("Cant remove task in current state:" + removeTask.state);
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}
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public synchronized void submitTask(Task newTask) {
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int id = getNextTaskid();
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newTask.setId(id);
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newTask.setManager(this);
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taskIdMap.put(id, newTask);
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tasks.add(newTask);
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executor.submit(newTask);
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}
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private synchronized int getNextTaskid() {
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return nextId++;
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}
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}
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