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SAK-42188 - Improve Announcement performance (sakaiproject#7159)
* SAK-42188 - Improve Announcement performance This commit adds a cache for announcement that improves performance accessing to messages. * squash
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...ouncement-impl/impl/src/java/org/sakaiproject/announcement/impl/AnnouncementObserver.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,66 @@ | ||
| package org.sakaiproject.announcement.impl; | ||
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| import java.util.List; | ||
| import java.util.Observable; | ||
| import java.util.Observer; | ||
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| import org.sakaiproject.announcement.api.AnnouncementService; | ||
| import org.sakaiproject.event.api.Event; | ||
| import org.sakaiproject.event.api.EventTrackingService; | ||
| import org.sakaiproject.memory.api.Cache; | ||
| import org.sakaiproject.memory.api.MemoryService; | ||
| import org.sakaiproject.message.api.Message; | ||
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| import lombok.Setter; | ||
| import lombok.extern.slf4j.Slf4j; | ||
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| @Slf4j | ||
| public class AnnouncementObserver implements Observer { | ||
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| @Setter | ||
| private EventTrackingService eventTrackingService; | ||
| @Setter | ||
| private MemoryService memoryService; | ||
| private Cache<String, List<Message>> messagesCache; | ||
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| public void init() { | ||
| eventTrackingService.addLocalObserver(this); | ||
| messagesCache = memoryService.getCache("org.sakaiproject.announcement.tool.messages.cache"); | ||
| } | ||
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| public void destroy() { | ||
| eventTrackingService.deleteObserver(this); | ||
| } | ||
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| public void update(Observable arg0, Object arg) { | ||
| if (!(arg instanceof Event)) { | ||
| return; | ||
| } | ||
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| final Event event = (Event) arg; | ||
| final String eventType = event.getEvent(); | ||
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| if (eventType != null) { | ||
| String channelName = getChannel(event); | ||
| switch(eventType) { | ||
| case AnnouncementService.SECURE_ANNC_ADD: | ||
| case AnnouncementService.SECURE_ANNC_UPDATE_ANY: | ||
| case AnnouncementService.SECURE_ANNC_UPDATE_OWN: | ||
| case AnnouncementService.SECURE_ANNC_REMOVE_ANY: | ||
| case AnnouncementService.SECURE_ANNC_REMOVE_OWN: | ||
| log.debug("Announcement event: {}", eventType); | ||
| messagesCache.remove(channelName); | ||
| break; | ||
| default: | ||
| break; | ||
| } | ||
| } | ||
| } | ||
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| private String getChannel(final Event event) { | ||
| final String[] resourceSplitted = event.getResource().split("/"); | ||
| final String site = resourceSplitted[3]; | ||
| return "/announcement/channel/" + site + "/main"; | ||
| } | ||
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| } |
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