| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| ReloadDelayDecorator |
|
| 2.25;2.25 | ||||
| ReloadDelayDecorator$1 |
|
| 2.25;2.25 |
| 1 | /* | |
| 2 | * Copyright (C) 1998-2000 Semiotek Inc. All Rights Reserved. | |
| 3 | * | |
| 4 | * Redistribution and use in source and binary forms, with or without | |
| 5 | * modification, are permitted under the terms of either of the following | |
| 6 | * Open Source licenses: | |
| 7 | * | |
| 8 | * The GNU General Public License, version 2, or any later version, as | |
| 9 | * published by the Free Software Foundation | |
| 10 | * (http://www.fsf.org/copyleft/gpl.html); | |
| 11 | * | |
| 12 | * or | |
| 13 | * | |
| 14 | * The Semiotek Public License (http://webmacro.org/LICENSE.) | |
| 15 | * | |
| 16 | * This software is provided "as is", with NO WARRANTY, not even the | |
| 17 | * implied warranties of fitness to purpose, or merchantability. You | |
| 18 | * assume all risks and liabilities associated with its use. | |
| 19 | * | |
| 20 | * See www.webmacro.org for more information on the WebMacro project. | |
| 21 | */ | |
| 22 | package org.webmacro.resource; | |
| 23 | ||
| 24 | import org.slf4j.Logger; | |
| 25 | import org.slf4j.LoggerFactory; | |
| 26 | import org.webmacro.Broker; | |
| 27 | import org.webmacro.InitException; | |
| 28 | import org.webmacro.util.Settings; | |
| 29 | ||
| 30 | import java.util.HashMap; | |
| 31 | import java.util.Map; | |
| 32 | ||
| 33 | /** | |
| 34 | * Utility class to handle creation of TimedReloadContext.<br> | |
| 35 | * TimedReloadContext objects are used to prevent a cached resource | |
| 36 | * of being checked for modification all the time, but only checks | |
| 37 | * for in given intervals. | |
| 38 | * <br> | |
| 39 | * This class stores a mapping of protocol types to delay values. | |
| 40 | * When a provider requests to decorate a reload context it looks up | |
| 41 | * the delay for this protocol and eventually creates a suitable | |
| 42 | * TimedReloadContext. | |
| 43 | * @author Sebastian Kanthak <sebastian.kanthak@muehlheim.de> | |
| 44 | */ | |
| 45 | 0 | public class ReloadDelayDecorator |
| 46 | { | |
| 47 | ||
| 48 | 2 | static Logger _log = LoggerFactory.getLogger(ReloadDelayDecorator.class); |
| 49 | ||
| 50 | /** maps protocol types to Long objects */ | |
| 51 | private Map reloadDelays; | |
| 52 | private long defaultDelay; | |
| 53 | ||
| 54 | public ReloadDelayDecorator () | |
| 55 | 12 | { |
| 56 | 12 | reloadDelays = new HashMap(11); |
| 57 | 12 | } |
| 58 | ||
| 59 | /** | |
| 60 | * Initialize object. | |
| 61 | * Reads config settings from key "CheckForReloadDelay" | |
| 62 | */ | |
| 63 | public void init (Broker b, Settings config) throws InitException | |
| 64 | { | |
| 65 | 12 | defaultDelay = 0; // no delay |
| 66 | 12 | synchronized (reloadDelays) |
| 67 | { | |
| 68 | 12 | config.processListSetting("CheckForReloadDelay", |
| 69 | new Settings.ListSettingHandler() | |
| 70 | 12 | { |
| 71 | public void processSetting (String key, String value) | |
| 72 | { | |
| 73 | 0 | if (key == null || key.length() == 0) |
| 74 | { | |
| 75 | // default reloadDelay | |
| 76 | 0 | defaultDelay = Long.parseLong(value); |
| 77 | } | |
| 78 | else | |
| 79 | { | |
| 80 | 0 | reloadDelays.put(key, Long.valueOf(value)); |
| 81 | } | |
| 82 | 0 | } |
| 83 | }); | |
| 84 | 12 | } |
| 85 | 12 | } |
| 86 | ||
| 87 | /** | |
| 88 | * Looks up the "check for reload delay" for protocol and creates | |
| 89 | * a suitable TimedReloadContext or passes back the original | |
| 90 | * reload context if delay <= 0 | |
| 91 | * @param protocol protocol to look up delay for | |
| 92 | * @param reloadContext reloadContext to decorate | |
| 93 | * @return eventually decorated reload context | |
| 94 | */ | |
| 95 | public CacheReloadContext decorate (String protocol, | |
| 96 | CacheReloadContext reloadContext) | |
| 97 | { | |
| 98 | long delay; | |
| 99 | Long l; | |
| 100 | 224 | synchronized (reloadDelays) |
| 101 | { | |
| 102 | 224 | l = (Long) reloadDelays.get(protocol); |
| 103 | 224 | } |
| 104 | 224 | delay = (l != null) ? l.longValue() : defaultDelay; |
| 105 | 224 | if (delay > 0) |
| 106 | { | |
| 107 | 0 | _log.debug("Returning timed reload context with delay " + delay); |
| 108 | 0 | return new TimedReloadContext(reloadContext, delay); |
| 109 | } | |
| 110 | else | |
| 111 | { | |
| 112 | 224 | _log.debug("Returning unmodified reload context"); |
| 113 | 224 | return reloadContext; |
| 114 | } | |
| 115 | } | |
| 116 | } |