1 /**
2 * This file Copyright (c) 2013 Magnolia International
3 * Ltd. (http://www.magnolia-cms.com). All rights reserved.
4 *
5 *
6 * This file is dual-licensed under both the Magnolia
7 * Network Agreement and the GNU General Public License.
8 * You may elect to use one or the other of these licenses.
9 *
10 * This file is distributed in the hope that it will be
11 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
12 * implied warranty of MERCHANTABILITY or FITNESS FOR A
13 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
14 * Redistribution, except as permitted by whichever of the GPL
15 * or MNA you select, is prohibited.
16 *
17 * 1. For the GPL license (GPL), you can redistribute and/or
18 * modify this file under the terms of the GNU General
19 * Public License, Version 3, as published by the Free Software
20 * Foundation. You should have received a copy of the GNU
21 * General Public License, Version 3 along with this program;
22 * if not, write to the Free Software Foundation, Inc., 51
23 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
24 *
25 * 2. For the Magnolia Network Agreement (MNA), this file
26 * and the accompanying materials are made available under the
27 * terms of the MNA which accompanies this distribution, and
28 * is available at http://www.magnolia-cms.com/mna.html
29 *
30 * Any modifications to this file must keep this entire header
31 * intact.
32 *
33 */
34 package info.magnolia.module.delta;
35
36 import info.magnolia.context.MgnlContext;
37 import info.magnolia.module.InstallContext;
38 import info.magnolia.objectfactory.Classes;
39 import info.magnolia.objectfactory.MgnlInstantiationException;
40
41 import org.apache.commons.chain.Command;
42
43 /**
44 * Task that executes command.
45 */
46 public class ExecuteCommandTask extends AbstractTask {
47
48 private Command command;
49 private Class<? extends Command> commandClass;
50
51 /**
52 * Constructor.
53 *
54 * @param taskName name of the task
55 * @param taskDescription description of the task
56 * @param commandName command class
57 * @param params parameters to be passed to the command's constructor
58 */
59 public ExecuteCommandTask(String taskName, String taskDescription, Class<? extends Command> commandClass, Object... params) {
60 super(taskName, taskDescription);
61 this.commandClass = commandClass;
62 try {
63 this.command = Classes.getClassFactory().newInstance(commandClass, params);
64 } catch (MgnlInstantiationException e) {
65 this.command = null;
66 }
67 }
68
69 @Override
70 public void execute(InstallContext installContext) throws TaskExecutionException {
71 if (this.command == null) {
72 String message = "Couldn't find command " + this.commandClass.getName() + ".";
73 installContext.warn(message);
74 return;
75 }
76
77 try {
78 this.command.execute(MgnlContext.getInstance());
79 } catch (Exception e) {
80 throw new TaskExecutionException(e.getMessage(), e);
81 }
82 }
83 }