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18 package org.apache.commons.configuration.reloading;
19
20 import org.apache.commons.configuration.FileConfiguration;
21 import org.apache.commons.logging.Log;
22 import org.apache.commons.logging.LogFactory;
23
24 /***
25 * A strategy to reload configuration based on management requests. Designed for
26 * JMX management.
27 *
28 * @author Nicolas De loof
29 */
30 public class ManagedReloadingStrategy implements ReloadingStrategy,
31 ManagedReloadingStrategyMBean
32 {
33 /*** The logger. */
34 private Log log = LogFactory.getLog(ManagedReloadingStrategy.class);
35
36 /*** Stores a reference to the associated configuration. */
37 private FileConfiguration configuration;
38
39 /*** A flag whether a reload is required. */
40 private boolean reloadingRequired;
41
42 /***
43 * @see org.apache.commons.configuration.reloading.ReloadingStrategy#init()
44 */
45 public void init()
46 {
47 return;
48 }
49
50 /***
51 * @see org.apache.commons.configuration.reloading.ReloadingStrategy#reloadingPerformed()
52 */
53 public void reloadingPerformed()
54 {
55 reloadingRequired = false;
56 }
57
58 /***
59 * Checks whether reloading is required. This implementation checks whether
60 * the <code>refresh()</code> method has been invokded.
61 *
62 * @return a flag whether reloading is required
63 * @see org.apache.commons.configuration.reloading.ReloadingStrategy#reloadingRequired()
64 */
65 public boolean reloadingRequired()
66 {
67 return reloadingRequired;
68 }
69
70 /***
71 * Sets the associated configuration.
72 *
73 * @param configuration the associated configuration
74 */
75 public void setConfiguration(FileConfiguration configuration)
76 {
77 this.configuration = configuration;
78 }
79
80 /***
81 * Tells this strategy that the monitored configuration file should be
82 * refreshed. This method will typically be called from outside (through an
83 * exposed MBean) on behalf of an administrator.
84 *
85 * @see org.apache.commons.configuration.reloading.ManagedReloadingStrategyMBean#refresh()
86 */
87 public void refresh()
88 {
89 log.info("Reloading configuration.");
90 this.reloadingRequired = true;
91
92 configuration.isEmpty();
93 }
94 }