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https://jira.nuxeo.org/browse/NXP-5152?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Stéfane Fermigier updated NXP-5152:
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Component/s: Clustering
> create a active/passive service
> -------------------------------
>
> Key: NXP-5152
> URL: https://jira.nuxeo.org/browse/NXP-5152
> Project: Nuxeo Enterprise Platform
> Issue Type: Improvement
> Components: Clustering
> Reporter: Alexandre Russel
>
> The goal is to be able to turn off/on 'administratively' a server.
> The administrative state of the server is 'active' or 'passive'. The
> server is always 'passive' when starting and it switches to 'active'
> when all services are deployed (you can change a property in
> nuxeo.properties
> to keep it 'passive'). A Rest API is available to toggle the state
> (Administrators only). The Service API allows to do it too.
> You can register a listener to the state of the service or
> query the state (it is a transient boolean singleton for the
> JVM). It will be the responsibility of services to turn themselves
> off when the server becomes passive (ie, if a service fetches email
> into Nuxeo, it should register a listener and stop fetching mail
> when the server becomes passive).
> The operational state of the server is an indication on how well
> the server is doing. It is not possible to switch the operational
> state, only to query it.
> It is possible to contribute a set of classes with an execute method
> and a maximum time in milliseconds.
> To know the operational state of the server, each execute method is
> run. If it returns in less than its maximum time and the server is
> in 'active' state, then the operational state is ok, otherwise, it
> is ko. (the result and time will be audited and logged)
> We might provides default contribution that will:
> - query a document with maximum time of 1 second.
> - connect to a datasource with maximum time of 1 second.
> A Rest API is available to query the operational state (plain text
> of ok/ko, open to anonymous). This operational state is to help a
> router to choose the server to send a request to.
>
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