| <!DOCTYPE html> |
| <!-- |
| | Generated by Apache Maven Doxia at 2017-03-16 |
| | Rendered using Apache Maven Fluido Skin 1.3.0 |
| --> |
| <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> |
| <head> |
| <meta charset="UTF-8" /> |
| <meta name="viewport" content="width=device-width, initial-scale=1.0" /> |
| <meta name="Date-Revision-yyyymmdd" content="20170316" /> |
| <meta http-equiv="Content-Language" content="en" /> |
| <title>Apache Atlas – Entity Change Notifications</title> |
| <link rel="stylesheet" href="./css/apache-maven-fluido-1.3.0.min.css" /> |
| <link rel="stylesheet" href="./css/site.css" /> |
| <link rel="stylesheet" href="./css/print.css" media="print" /> |
| |
| |
| <script type="text/javascript" src="./js/apache-maven-fluido-1.3.0.min.js"></script> |
| |
| |
| |
| <script type="text/javascript">$( document ).ready( function() { $( '.carousel' ).carousel( { interval: 3500 } ) } );</script> |
| |
| </head> |
| <body class="topBarEnabled"> |
| |
| |
| |
| |
| |
| <div id="topbar" class="navbar navbar-fixed-top "> |
| <div class="navbar-inner"> |
| <div class="container" style="width: 68%;"><div class="nav-collapse"> |
| |
| |
| <ul class="nav"> |
| <li class="dropdown"> |
| <a href="#" class="dropdown-toggle" data-toggle="dropdown">Atlas <b class="caret"></b></a> |
| <ul class="dropdown-menu"> |
| |
| <li> <a href="index.html" title="About">About</a> |
| </li> |
| |
| <li> <a href="https://cwiki.apache.org/confluence/display/ATLAS" title="Wiki">Wiki</a> |
| </li> |
| |
| <li> <a href="https://cwiki.apache.org/confluence/display/ATLAS" title="News">News</a> |
| </li> |
| |
| <li> <a href="https://git-wip-us.apache.org/repos/asf/incubator-atlas.git" title="Git">Git</a> |
| </li> |
| |
| <li> <a href="https://issues.apache.org/jira/browse/ATLAS" title="Jira">Jira</a> |
| </li> |
| |
| <li> <a href="https://cwiki.apache.org/confluence/display/ATLAS/PoweredBy" title="Powered by">Powered by</a> |
| </li> |
| |
| <li> <a href="http://blogs.apache.org/atlas/" title="Blog">Blog</a> |
| </li> |
| </ul> |
| </li> |
| <li class="dropdown"> |
| <a href="#" class="dropdown-toggle" data-toggle="dropdown">Project Information <b class="caret"></b></a> |
| <ul class="dropdown-menu"> |
| |
| <li> <a href="project-info.html" title="Summary">Summary</a> |
| </li> |
| |
| <li> <a href="mail-lists.html" title="Mailing Lists">Mailing Lists</a> |
| </li> |
| |
| <li> <a href="http://webchat.freenode.net?channels=apacheatlas&uio=d4" title="IRC">IRC</a> |
| </li> |
| |
| <li> <a href="team-list.html" title="Team">Team</a> |
| </li> |
| |
| <li> <a href="issue-tracking.html" title="Issue Tracking">Issue Tracking</a> |
| </li> |
| |
| <li> <a href="source-repository.html" title="Source Repository">Source Repository</a> |
| </li> |
| |
| <li> <a href="license.html" title="License">License</a> |
| </li> |
| </ul> |
| </li> |
| <li class="dropdown"> |
| <a href="#" class="dropdown-toggle" data-toggle="dropdown">Releases <b class="caret"></b></a> |
| <ul class="dropdown-menu"> |
| |
| <li> <a href="http://www.apache.org/dyn/closer.cgi/incubator/atlas/0.8.0-incubating/" title="0.8-incubating">0.8-incubating</a> |
| </li> |
| |
| <li> <a href="http://archive.apache.org/dist/incubator/atlas/0.7.1-incubating/" title="0.7.1-incubating">0.7.1-incubating</a> |
| </li> |
| |
| <li> <a href="http://archive.apache.org/dist/incubator/atlas/0.7.0-incubating/" title="0.7-incubating">0.7-incubating</a> |
| </li> |
| |
| <li> <a href="http://archive.apache.org/dist/incubator/atlas/0.6.0-incubating/" title="0.6-incubating">0.6-incubating</a> |
| </li> |
| |
| <li> <a href="http://archive.apache.org/dist/incubator/atlas/0.5.0-incubating/" title="0.5-incubating">0.5-incubating</a> |
| </li> |
| </ul> |
| </li> |
| <li class="dropdown"> |
| <a href="#" class="dropdown-toggle" data-toggle="dropdown">Documentation <b class="caret"></b></a> |
| <ul class="dropdown-menu"> |
| <li><a href="../index.html" title="latest">latest</a></li> |
| <li><a href="../0.8.0-incubating/index.html" title="0.8-incubating">0.8-incubating</a></li> |
| <li><a href="../0.7.1-incubating/index.html" title="0.7.1-incubating">0.7.1-incubating</a></li> |
| <li><a href="../0.7.0-incubating/index.html" title="0.7-incubating">0.7-incubating</a></li> |
| <li><a href="../0.6.0-incubating/index.html" title="0.6-incubating">0.6-incubating</a></li> |
| <li><a href="../0.5.0-incubating/index.html" title="0.5-incubating">0.5-incubating</a></li> |
| </ul> |
| </li> |
| <li class="dropdown"> |
| <a href="#" class="dropdown-toggle" data-toggle="dropdown">ASF <b class="caret"></b></a> |
| <ul class="dropdown-menu"> |
| |
| <li> <a href="http://www.apache.org/foundation/how-it-works.html" title="How Apache Works">How Apache Works</a> |
| </li> |
| |
| <li> <a href="http://www.apache.org/foundation/" title="Foundation">Foundation</a> |
| </li> |
| |
| <li> <a href="http://www.apache.org/foundation/sponsorship.html" title="Sponsoring Apache">Sponsoring Apache</a> |
| </li> |
| |
| <li> <a href="http://www.apache.org/foundation/thanks.html" title="Thanks">Thanks</a> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| |
| <form id="search-form" action="http://www.google.com/search" method="get" class="navbar-search pull-right" > |
| |
| <input value="http://atlas.incubator.apache.org" name="sitesearch" type="hidden"/> |
| <input class="search-query" name="q" id="query" type="text" /> |
| </form> |
| <script type="text/javascript" src="http://www.google.com/coop/cse/brand?form=search-form"></script> |
| |
| |
| |
| |
| |
| <iframe src="http://www.facebook.com/plugins/like.php?href=http://atlas.incubator.apache.org/atlas-docs&send=false&layout=button_count&show-faces=false&action=like&colorscheme=dark" |
| scrolling="no" frameborder="0" |
| style="border:none; width:80px; height:20px; margin-top: 10px;" class="pull-right" ></iframe> |
| |
| <script type="text/javascript" src="https://apis.google.com/js/plusone.js"></script> |
| |
| <ul class="nav pull-right"><li style="margin-top: 10px;"> |
| |
| <div class="g-plusone" data-href="http://atlas.incubator.apache.org/atlas-docs" data-size="medium" width="60px" align="right" ></div> |
| |
| </li></ul> |
| |
| |
| </div> |
| |
| </div> |
| </div> |
| </div> |
| |
| <div class="container"> |
| <div id="banner"> |
| <div class="pull-left"> |
| <a href=".." id="bannerLeft"> |
| <img src="images/atlas-logo.png" alt="Apache Atlas" width="200px" height="45px"/> |
| </a> |
| </div> |
| <div class="pull-right"> <a href="http://incubator.apache.org" id="bannerRight"> |
| <img src="images/apache-incubator-logo.png" alt="Apache Incubator"/> |
| </a> |
| </div> |
| <div class="clear"><hr/></div> |
| </div> |
| |
| <div id="breadcrumbs"> |
| <ul class="breadcrumb"> |
| |
| |
| <li class=""> |
| <a href="http://www.apache.org" class="externalLink" title="Apache"> |
| Apache</a> |
| </li> |
| <li class="divider ">/</li> |
| <li class=""> |
| <a href="index.html" title="Atlas"> |
| Atlas</a> |
| </li> |
| <li class="divider ">/</li> |
| <li class="">Entity Change Notifications</li> |
| |
| |
| |
| <li id="publishDate" class="pull-right">Last Published: 2017-03-16</li> <li class="divider pull-right">|</li> |
| <li id="projectVersion" class="pull-right">Version: 0.8-incubating</li> |
| |
| </ul> |
| </div> |
| |
| |
| |
| <div id="bodyColumn" > |
| |
| <div class="section"> |
| <h2><a name="Entity_Change_Notifications"></a>Entity Change Notifications</h2> |
| <p>To receive Atlas entity notifications a consumer should be obtained through the notification interface. Entity change notifications are sent every time a change is made to an entity. Operations that result in an entity change notification are:</p> |
| <ul> |
| <li><code>ENTITY_CREATE</code> - Create a new entity.</li> |
| <li><code>ENTITY_UPDATE</code> - Update an attribute of an existing entity.</li> |
| <li><code>TRAIT_ADD</code> - Add a trait to an entity.</li> |
| <li><code>TRAIT_DELETE</code> - Delete a trait from an entity.</li></ul> |
| <div class="source"> |
| <pre> |
| // Obtain provider through injection… |
| Provider<NotificationInterface> provider; |
| |
| // Get the notification interface |
| NotificationInterface notification = provider.get(); |
| |
| // Create consumers |
| List<NotificationConsumer<EntityNotification>> consumers = |
| notification.createConsumers(NotificationInterface.NotificationType.ENTITIES, 1); |
| |
| </pre></div> |
| <p>The consumer exposes the Iterator interface that should be used to get the entity notifications as they are posted. The hasNext() method blocks until a notification is available.</p> |
| <div class="source"> |
| <pre> |
| while(consumer.hasNext()) { |
| EntityNotification notification = consumer.next(); |
| |
| IReferenceableInstance entity = notification.getEntity(); |
| … |
| } |
| |
| </pre></div></div> |
| </div> |
| </div> |
| |
| <hr/> |
| |
| <footer> |
| <div class="container"> |
| <div class="row span12">Copyright © 2015-2017 |
| <a href="http://www.apache.org">Apache Software Foundation</a>. |
| All Rights Reserved. |
| |
| </div> |
| |
| |
| <p id="poweredBy" class="pull-right"> |
| <a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"> |
| <img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /> |
| </a> |
| </p> |
| |
| </div> |
| </footer> |
| </body> |
| </html> |
