nsIObserver in Firefox 2.0

Implemented by

@mozilla.org/oji/jvm-mgr;1
@mozilla.org/network/protocol-proxy-service;1
@mozilla.org/storage/service;1
@mozilla.org/updates/timer-manager;1
@mozilla.org/plugin/manager;1
@mozilla.org/permissions/contentblocker;1
@mozilla.org/uriloader/external-helper-app-service;1
@mozilla.org/scriptsecuritymanager;1
@mozilla.org/browser/browserglue;1
@mozilla.org/network/protocol;1?name=ftp
@mozilla.org/accessibilityService;1
@mozilla.org/browser/sessionstore;1
@mozilla.org/libjar/zip-reader-cache;1
@mozilla.org/cookiemanager;1
@mozilla.org/network/dns-service;1
@mozilla.org/network/idn-service;1
@mozilla.org/microsummary/service;1
@mozilla.org/browser/bookmarks-service;1
@mozilla.org/intl/xmlencoding;1
@mozilla.org/network/protocol;1?name=http
@mozilla.org/content/http-startup;1
@mozilla.org/embeddor.implemented/bookmark-charset-resolver;1
@mozilla.org/embeddor.implemented/web-content-handler-registrar;1
@mozilla.org/network/util;1
@mozilla.org/permissionmanager;1
@mozilla.org/spellchecker/myspell;1
@mozilla.org/xbl;1
@mozilla.org/accessibleRetrieval;1
@mozilla.org/cookie/permission;1
@mozilla.org/appshell/appShellService;1
@mozilla.org/js/jsd/app-start-observer;2
@mozilla.org/browser/search-service;1
@mozilla.org/embedcomp/appstartup-notifier;1
@mozilla.org/satchel/form-history;1
@mozilla.org/autoconfiguration;1
@mozilla.org/readconfig;1
@mozilla.org/network/protocol;1?name=moz-gnomevfs
@mozilla.org/cookieService;1
@mozilla.org/chrome/chrome-registry;1
@mozilla.org/network/io-thread-pool;1
@mozilla.org/rdf/datasource;1?name=window-mediator
@mozilla.org/preferences;1
@mozilla.org/passwordmanager;1
@mozilla.org/toolkit/remote-service;1
@mozilla.org/gfx/devicecontext;1
@mozilla.org/prefetch-service;1
@mozilla.org/psm;1
@mozilla.org/spellchecker/personaldictionary;1
@mozilla.org/rdf/datasource;1?name=local-store
@mozilla.org/preferences-service;1
@mozilla.org/mime;1
@mozilla.org/autocomplete/search;1?name=search-autocomplete
@mozilla.org/toolkit/app-startup;1
@mozilla.org/secure_browser_ui;1
@mozilla.org/browser/safebrowsing/navstartlistener;1
@mozilla.org/system-preferences;1
@mozilla.org/plugin/host;1
@mozilla.org/network/incremental-download;1
@mozilla.org/download-manager;1
@mozilla.org/rdf/datasource;1?name=internetsearch
@mozilla.org/widget/dragservice;1
@mozilla.org/intl/metacharset;1
@mozilla.org/extensions/manager;1
@mozilla.org/typeaheadfind;1
@mozilla.org/image/cache;1
@mozilla.org/browser/internetsearch-service;1
@mozilla.org/uriloader/external-protocol-service;1
@mozilla.org/url-classifier/dbservice;1
@mozilla.org/exceptionservice;1
@mozilla.org/gfx/decidecontext/ps;1
@mozilla.org/xpinstall;1
@mozilla.org/moz/jsloader;1
@mozilla.org/intl/stringbundle;1
@mozilla.org/xpinstall/install-manager;1
@mozilla.org/globalprefsecuritycheck;1
@mozilla.org/chrome/chrome-native-theme;1
@mozilla.org/rdf/datasource;1?name=bookmarks
@mozilla.org/xul/xul-prototype-cache;1
@mozilla.org/browser/global-history;2
@mozilla.org/updates/update-service;1
@mozilla.org/browser/sessionstartup;1
@mozilla.org/autocomplete/search;1?name=history
@mozilla.org/PopupWindowManager;1
@mozilla.org/browser/feeds/result-writer;1
@mozilla.org/network/io-service;1
@mozilla.org/rdf/datasource;1?name=history
@mozilla.org/progressdialog;1
@mozilla.org/toolkit/native-app-support;1
@mozilla.org/widget/clipboard;1
@mozilla.org/browser/shell-service;1
@mozilla.org/network/network-link-service;1

 This interface is implemented by an object that wants
 to observe an event corresponding to a topic.

 @status FROZEN

[scriptable, uuid(db242e01-e4d9-11d2-9dde-000064657374)]

Methods

 Observe will be called when there is a notification for the
 topic |aTopic|.  This assumes that the object implementing
 this interface has been registered with an observer service
 such as the nsIObserverService. 

 If you expect multiple topics/subjects, the impl is 
 responsible for filtering.

 You should not modify, add, remove, or enumerate 
 notifications in the implemention of observe. 

 @param aSubject : Notification specific interface pointer.
 @param aTopic   : The notification topic or subject.
 @param aData    : Notification specific wide string.
                    subject event.

void observe(in nsISupports aSubject, in string aTopic, in wstring aData)