Frank van Lankvelt shows how relaxing CNDs can make development and upgrade of Hippo implementations easier.

1. Relaxing CNDs
Hippo GetTogether
20 aug 2010
Frank van Lankvelt • f.vanlankvelt@onehippo.com

2. Who am I?
Short CV:
theoretical physics in Utrecht
PhD in Amsterdam
(anti-virus) driver developer at Sophos (Oxford)
CMS frontend / plugin framework lead at Hippo

3. Introduction
Relaxing CNDs should make Updates and Upgrades easier. But:
How relaxed are "relaxing CNDs"?
Outline
1. demo
2. hippo:version tags
3. upgrade modules
4. limitations
5. outlook

4. Demo

5. Importing CNDs
Import CNDs either
Runtime:
"import CND" in the web console
Bootstrap:
hippo:initializeitem in hippoecm-extension.xml
Develop with runtime imports, update and upgrade projects
using bootstrap.

6. Hippo:version tags
hippoecm-extension.xml, use a hippo:version property.
hippoecm-extension.xml:
<?xml version="1.0" encoding="UTF-8"?>
<sv:node xmlns:sv="http://www.jcp.org/jcr/sv/1.0"
sv:name="hippo:initialize">
<sv:property sv:name="jcr:primaryType" sv:type="Name">
<sv:value>hippo:initializefolder</sv:value>
</sv:property>
<sv:property sv:name="hippo:version" sv:type="String">
<sv:value>hippogogreen-v1_1</sv:value>
</sv:property>
...
</sv:node>

7. Upgrade modules
Upgrade modules are triggered using the hippo:version tags:
public void register(final UpdaterContext context) {
context.registerName("gogreen-update-v11");
context.registerStartTag("hippogogreen-v1_0");
context.registerEndTag("hippogogreen-v1_1");
Tags are used to identify "repository version"
Clean bootstrap has same tags as upgraded repository
Names are used in upgrades for ordering of module execution:
context.registerAfter("upgrade-v13a");
Plugins must use these too; projects should not need to
upgrade plugin configuration or content.

8. Limitations & Outlook
Only two operations possible within existing namespace
1. add a field to an existing type
2. add a new compound or document type
Improvements:
1. integration with document type editor
=> on the roadmap for Hippo CMS 7.5 release
2. automate svn / repository compare and synchronization?
3. declarative upgrade modules?
4. <more ideas here>

9. Questions?