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From: mikezaccardo <git@git.apache.org>
To: dev@brooklyn.incubator.apache.org
Reply-To: dev@brooklyn.incubator.apache.org
Message-ID: <git-pr-1037-incubator-brooklyn@git.apache.org>
Subject: [GitHub] incubator-brooklyn pull request: Add quorum check enricher
 and agg...
Content-Type: text/plain
Date: Tue, 17 Nov 2015 20:35:34 +0000 (UTC)

GitHub user mikezaccardo opened a pull request:

    https://github.com/apache/incubator-brooklyn/pull/1037

    Add quorum check enricher and aggregator

    This addition enables the creation of a sensor, defined in YAML, to set its value based on whether a quorum of entities has has the necessary source sensor value.
    
    Example:
    
    ```
    name: Quorum Check Test
    location: localhost
    services:
      - type: org.apache.brooklyn.entity.group.DynamicCluster
        name: Cluster
        
        brooklyn.config:
          initialSize: 5
        
        memberSpec:
            $brooklyn:entitySpec:
                type: org.apache.brooklyn.entity.software.base.EmptySoftwareProcess
                name: Cluster Member
                
        brooklyn.enrichers:
        - type: org.apache.brooklyn.enricher.stock.Aggregator
          brooklyn.config:
            uniqueTag: service-all-is-up-aggregator
            enricher.transformation.untyped: "isQuorate"
            quorum.check.type: "allAndAtLeastOne"
            quorum.total.size: $brooklyn:config("cluster.initial.size")
            enricher.aggregator.excludeBlank: true
            enricher.aggregating.fromMembers: true
            enricher.sourceSensor: $brooklyn:sensor("service.isUp")
            enricher.targetSensor: $brooklyn:sensor("cluster.isQuorate")
    ```
    
    This creates a `cluster.isQuorate` sensor whose value depends on whether a quorum of cluster members have `service.isUp` equal to true.  In this example, all members must have a true value since `allAndAtLeastOne` is the specified `quorum.check.type`.

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/mikezaccardo/incubator-brooklyn quorum-check-enricher-aggregator

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/incubator-brooklyn/pull/1037.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #1037
    
----
commit 2a7eb77ec44ae5ac83850fb4cbff729295806238
Author: Mike Zaccardo <mike.zaccardo@cloudsoftcorp.com>
Date:   2015-11-17T20:28:26Z

    Add quorum check enricher and aggregator

----


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