adressevedligehold/tasks/Task.java

package dk.daoas.adressevedligehold.tasks;

import dk.daoas.adressevedligehold.util.TimingHelper;

public abstract class Task implements Runnable {
        
        public enum TaskState {
                STATE_QUEUED, STATE_RUNNING, STATE_DONE, STATE_ABORTED;
        }
        
        public static class TaskBean {
                public String description;
                public String detail;
                public String errorMessage;
                public double percentCompleted;
                public String state;
        }
        
        protected boolean abort = false;
        protected TaskState state = TaskState.STATE_QUEUED;
        protected TaskManager manager;
        private String errorMsg;
        
        public void setManager(TaskManager manager) {
                this.manager = manager;
        }
        
        @Override
        public final void run() {
                TimingHelper timing = new TimingHelper();
                System.out.println("Starting " + this.getDescription() );
                
                this.state = TaskState.STATE_RUNNING;
                manager.setCurrentTask(this);
                
                try {
                        taskRun();
                        this.state = TaskState.STATE_DONE;
                } catch (Exception e) {
                        this.errorMsg = e.getMessage();
                        e.printStackTrace();
                        this.state = TaskState.STATE_ABORTED;
                }
                
                manager.setCurrentTask(null);
                
                System.out.println("Done " + this.getDescription() + "   " + timing.getElapsed() + "ms");
        }
        
        
        public TaskState getState() {
                return this.state;
        }
        
        public void doAbort() {
                this.abort = true;
        }
        
        public TaskBean getTaskBean() {
                TaskBean bean = new TaskBean();
                
                bean.description = this.getDescription();
                bean.detail = this.getDetail();
                bean.percentCompleted = this.getPercentCompleted();
                bean.state = this.state.toString();
                bean.errorMessage = this.getErrorMessage();
                
                return bean;
        }
        
        public String getErrorMessage() {
                return this.errorMsg;
        }
        
        /**
         * @throws Exception
         * 
         * Implementing classes should not catch terminating exceptions but let it propagate to Task the Task::run()
         * method.
         */
        protected abstract void taskRun() throws Exception;
        
        public abstract String getDescription();
        public abstract String getDetail();
        public abstract short getPercentCompleted();
        
}
1	package dk.daoas.adressevedligehold.tasks;
2
3	import dk.daoas.adressevedligehold.util.TimingHelper;
4
5	public abstract class Task implements Runnable {
6
7	public enum TaskState {
8	STATE_QUEUED, STATE_RUNNING, STATE_DONE, STATE_ABORTED;
9	}
10
11	public static class TaskBean {
12	public String description;
13	public String detail;
14	public String errorMessage;
15	public double percentCompleted;
16	public String state;
17	}
18
19	protected boolean abort = false;
20	protected TaskState state = TaskState.STATE_QUEUED;
21	protected TaskManager manager;
22	private String errorMsg;
23
24	public void setManager(TaskManager manager) {
25	this.manager = manager;
26	}
27
28	@Override
29	public final void run() {
30	TimingHelper timing = new TimingHelper();
31	System.out.println("Starting " + this.getDescription() );
32
33	this.state = TaskState.STATE_RUNNING;
34	manager.setCurrentTask(this);
35
36	try {
37	taskRun();
38	this.state = TaskState.STATE_DONE;
39	} catch (Exception e) {
40	this.errorMsg = e.getMessage();
41	e.printStackTrace();
42	this.state = TaskState.STATE_ABORTED;
43	}
44
45	manager.setCurrentTask(null);
46
47	System.out.println("Done " + this.getDescription() + " " + timing.getElapsed() + "ms");
48	}
49
50
51	public TaskState getState() {
52	return this.state;
53	}
54
55	public void doAbort() {
56	this.abort = true;
57	}
58
59	public TaskBean getTaskBean() {
60	TaskBean bean = new TaskBean();
61
62	bean.description = this.getDescription();
63	bean.detail = this.getDetail();
64	bean.percentCompleted = this.getPercentCompleted();
65	bean.state = this.state.toString();
66	bean.errorMessage = this.getErrorMessage();
67
68	return bean;
69	}
70
71	public String getErrorMessage() {
72	return this.errorMsg;
73	}
74
75	/**
76	* @throws Exception
77	*
78	* Implementing classes should not catch terminating exceptions but let it propagate to Task the Task::run()
79	* method.
80	*/
81	protected abstract void taskRun() throws Exception;
82
83	public abstract String getDescription();
84	public abstract String getDetail();
85	public abstract short getPercentCompleted();
86
87	}