| Clover coverage report - Alipes Project - 0.1 |
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| Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
| PollingMonitor.java | - | 30.8% | 40% | 33.3% |
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| 1 | /* | |
| 2 | * $Id: PollingMonitor.java,v 1.1 2004/03/17 21:18:02 johndavidtaylor Exp $ | |
| 3 | * Created on Feb 20, 2004 by John Taylor jdt@roe.ac.uk . | |
| 4 | */ | |
| 5 | package org.abraracourcix.alipes.monitors; | |
| 6 | import org.abraracourcix.alipes.listeners.Listener; | |
| 7 | /** | |
| 8 | * adds the threaded stuff required to do the polling of the resource Clients | |
| 9 | * of subclasses need to call start() to kick off the class. | |
| 10 | * @author jdt | |
| 11 | * | |
| 12 | */ | |
| 13 | public abstract class PollingMonitor | |
| 14 | extends AbstractMonitor | |
| 15 | implements Runnable { | |
| 16 | /** | |
| 17 | * Conversioon between seconds and milliseconds | |
| 18 | */ | |
| 19 | private static final int MILLIS_PER_SEC = 1000; | |
| 20 | /** | |
| 21 | * Commons-logging logger | |
| 22 | */ | |
| 23 | private static org.apache.commons.logging.Log log = | |
| 24 | org.apache.commons.logging.LogFactory.getLog(PollingMonitor.class); | |
| 25 | /** | |
| 26 | * Time in milliseconds between polls | |
| 27 | */ | |
| 28 | private long waitTime; | |
| 29 | /** | |
| 30 | * Constructor | |
| 31 | * | |
| 32 | * @param listener | |
| 33 | * who's listening to me? | |
| 34 | * @param pollingFrequency | |
| 35 | * in seconds | |
| 36 | */ | |
| 37 | 3 | public PollingMonitor( |
| 38 | final Listener listener, | |
| 39 | final long pollingFrequency) { | |
| 40 | 3 | super(listener); |
| 41 | 3 | setPollingFrequency(pollingFrequency); |
| 42 | } | |
| 43 | /** | |
| 44 | * Start polling. Should be called after the class is created. Cannot stick | |
| 45 | * this in the ctor, because it calls nonfinal methods (EJS rule #81) and | |
| 46 | * has the potential to access partially constructed classes. | |
| 47 | */ | |
| 48 | 0 | public final void start() { |
| 49 | 0 | new Thread(this).start(); |
| 50 | } | |
| 51 | /** | |
| 52 | * For subclasses to implement. Executed every pollingFrequency seconds. | |
| 53 | * | |
| 54 | */ | |
| 55 | public abstract void pole(); | |
| 56 | /** | |
| 57 | * Setter | |
| 58 | * | |
| 59 | * @param seconds | |
| 60 | * between polls | |
| 61 | */ | |
| 62 | 3 | public final void setPollingFrequency(final long seconds) { |
| 63 | 3 | log.debug("Setting polling frequency to " + seconds); |
| 64 | 3 | waitTime = seconds * MILLIS_PER_SEC; |
| 65 | } | |
| 66 | /** | |
| 67 | * getter | |
| 68 | * | |
| 69 | * @return polling frequency in seconds | |
| 70 | */ | |
| 71 | 0 | public final long getPollingFrequency() { |
| 72 | 0 | return waitTime / MILLIS_PER_SEC; |
| 73 | } | |
| 74 | /** | |
| 75 | * Standard Thread run method | |
| 76 | */ | |
| 77 | 0 | public final void run() { |
| 78 | 0 | while (true) { |
| 79 | 0 | log.debug("Polling"); |
| 80 | 0 | pole(); |
| 81 | 0 | try { |
| 82 | 0 | log.debug("Waiting"); |
| 83 | 0 | Thread.sleep(waitTime); |
| 84 | } catch (InterruptedException ie) { | |
| 85 | 0 | log.debug("Interrupted ", ie); |
| 86 | } | |
| 87 | } | |
| 88 | } | |
| 89 | } | |
| 90 | /* | |
| 91 | * $Log: PollingMonitor.java,v $ | |
| 92 | * Revision 1.1 2004/03/17 21:18:02 johndavidtaylor | |
| 93 | * Copied across from incubation in beanpeeler | |
| 94 | * | |
| 95 | * Revision 1.6 2004/03/14 18:49:15 johndavidtaylor | |
| 96 | * corrected comments | |
| 97 | * | |
| 98 | * Revision 1.5 2004/03/11 15:46:34 johndavidtaylor | |
| 99 | * Applied coding standards | |
| 100 | * Revision 1.4 2004/03/11 11:33:46 | |
| 101 | * johndavidtaylor Refactored the way that the PollingMonitor worked. | |
| 102 | * Previously it got started in its ctor, but this allowed access to subclass | |
| 103 | * resources that hadn't yet been initialised. Bad. Now needs to be started | |
| 104 | * explicitly post-construction. | |
| 105 | * | |
| 106 | * Revision 1.3 2004/03/09 22:29:33 johndavidtaylor Added stuff for file | |
| 107 | * wildcards/regexps | |
| 108 | * | |
| 109 | * Revision 1.2 2004/03/08 20:16:45 johndavidtaylor refactored to new package | |
| 110 | * name | |
| 111 | * | |
| 112 | * Revision 1.1 2004/03/08 19:58:25 johndavidtaylor Initial commit -transfer | |
| 113 | * from previous repository | |
| 114 | * | |
| 115 | * Revision 1.1 2004/03/02 23:04:37 jdt new | |
| 116 | * | |
| 117 | */ |
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