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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMBARI-8400) Alerts: Template Engine for Dispatching
Date Fri, 21 Nov 2014 14:38:34 GMT

    [ https://issues.apache.org/jira/browse/AMBARI-8400?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14220979#comment-14220979
] 

Hudson commented on AMBARI-8400:
--------------------------------

SUCCESS: Integrated in Ambari-trunk-Commit-docker #295 (See [https://builds.apache.org/job/Ambari-trunk-Commit-docker/295/])
AMBARI-8400 - Alerts: Template Engine for Dispatching (jonathanhurley) (jhurley: http://git-wip-us.apache.org/repos/asf?p=ambari.git&a=commit&h=650e9d4372d0f9b6a1cec8b64ae8f09b4d565728)
* ambari-server/src/main/java/org/apache/ambari/server/notifications/dispatchers/EmailDispatcher.java
* ambari-server/src/main/java/org/apache/ambari/server/notifications/DispatchFactory.java
* ambari-server/src/main/resources/stacks/HDP/2.0.6/services/HDFS/alerts.json
* ambari-server/src/main/resources/stacks/HDP/1.3.2/services/HDFS/alerts.json
* ambari-server/src/test/java/org/apache/ambari/server/state/services/AlertNoticeDispatchServiceTest.java
* ambari-server/src/main/java/org/apache/ambari/server/configuration/Configuration.java
* ambari-server/src/main/java/org/apache/ambari/server/api/query/render/AlertSummaryGroupedRenderer.java
* ambari-server/src/main/java/org/apache/ambari/server/AmbariService.java
* ambari-server/src/main/resources/stacks/BIGTOP/0.8/services/HDFS/alerts.json
* ambari-server/src/main/java/org/apache/ambari/server/controller/ControllerModule.java
* ambari-server/src/main/resources/alert-templates.xml
* ambari-server/src/main/java/org/apache/ambari/server/state/services/AlertNoticeDispatchService.java


> Alerts: Template Engine for Dispatching
> ---------------------------------------
>
>                 Key: AMBARI-8400
>                 URL: https://issues.apache.org/jira/browse/AMBARI-8400
>             Project: Ambari
>          Issue Type: Task
>          Components: alerts, ambari-server
>    Affects Versions: 2.0.0
>            Reporter: Jonathan Hurley
>            Assignee: Jonathan Hurley
>             Fix For: 2.0.0
>
>         Attachments: AMBARI-8400.patch
>
>
> Ambari's various dispatchers (such as Email and SNMP) can benefit from having a mechanism
where a template can be defined for the construction of notification data. This decouples
the content that Ambari is sending from the logic to compute the aggregate alerts.
> Apache Velocity is a good choice for this requirement as it includes a maturing template
language, VTL. 
> A single XML file that ships with Ambari will contain the default templates for known
alert target types. There will be an option to override the use of this file with a user-specified
location via ambari.properties. In the event that a user-specific XML file cannot be parsed,
appropriate exceptions will be thrown, but the {{AlertNoticeDispatchService}} will attempt
to gracefully fallback on other content rendering options (such as the internal XML file).
> The following data should be exposed to VTL:
> - a list of all alert changes
> -- alert name, state, date, label
> -- a list for each state change
> -- lists for all alerts, broke down by service and state 
> - a list of all services with an alert
> - a list of all hosts with an alert
> - total counts of changes separated
> -- one count for each alert state



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