Feature #33530: add attribute @last-modified on element <view> - Lavoisier - IN2P3-Forge

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Feature #33530

closed

add attribute @last-modified on element <view>

Added by Reynaud Sylvain about 6 years ago. Updated about 6 years ago.

Status:

Resolved

Priority:

Normal

Assigned To:

Reynaud Sylvain

Category:

Engine

Target version:

Start date:

06/06/2018

Due date:

% Done:

100%

Estimated time:

Description

This attribute will expect a XPath expression that returns a timestamp.

When this optional attribute is missing, default value will depend on the view:

if the view is cached, then the default timestamp will be the last refresh date of the cache.
else the default timestamp will be current date.

This timestamp will be used by the service layer to fill the Last-Modified HTTP header, using the date format described on this page: [[https://developer.mozilla.org/fr/docs/Web/HTTP/Headers/Last-Modified]].

Example usage for CMDB use-case:

<view name="query" xmlns:date="http://exslt.org/dates-and-times" last-modified="date:seconds(date:parse-date(view_path('status', "/jmx/domain/group/mbean[@name='neo4j-populate']/attribute[@name='LastBuildDate']/value/text()"), 'EEE MMM dd HH:mm:ss z yyyy'))*1000"/>

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Updated by Reynaud Sylvain about 6 years ago

CORRECTION:

Application developer should not have to care about this !

Instead of adding a new attribute @last-modified, Lavoisier will support a new optional plugin interface LastModifiedConnector. When this interface is not implemented, or when the view contains a section <processors/>, the default timestamp will be the current date.

Example implementation of this new interface:

FileConnector will return the date of the last modification of the referenced file.
Neo4jQueryConnector will return the date of the last update of the database.

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