How to add custom variables to freemarker?

[7年前 に Mark Clarke によって更新されました。]

Hi there,

We need to add some custom variables to the freemarker context and its a bit more complicated that what can be handled by editing init-custom.ftl. I have tried by implementing ServicePreAction but the blade generated project could not find the class. I have had a look at the blade samples and the LoginPreAction example but there seems to only be events for pre/post login and pre/post service. What service and/or what event do I need to override/extend to be able to add custom variables for our theme?

thanks

[7年前 に Mark Clarke によって更新されました。]

Ok - I found this example fro TemplateContextContributor

https://github.com/liferay/liferay-blade-samples/tree/master/gradle/blade.template.context.contributor

Seems to fire multiple times when a url takes the user to a new page? Is this the correct service to implement as a OSGI component to achieve what I want? Its nice and simple - just want to check the "firing multiple times" issue and what are the recommendations for caching any queries etc that may be necessary to populate the context variables?

thanks

[7年前 に Julio Camarero によって更新されました。]

Hi Mark,

yes, that is exactly the goal of the Context Contributors, inject anything you need to your template context (either themes or ADTs). We have a tutorial about them almost ready that will contain all the details. I will post a link here when it is published.

Regarding the fact that they are executed several times, that sounds like a bug. Could you please report it in JIRA giving more details? We should have a look if that is the case.

Regarding caching, you can use any mechanism that fits your needs. You could store things in database, you could store things in the cache utilities provided by liferay, you could store things in the elastic search engine included, you could just put your variable in a private variable... it depends on what you need to do.

Thank you!

[7年前 に Peter Pan によって更新されました。]

thanks Julio - will gather the necessary info and then post a bug report.

[7年前 に Cody Hoag によって更新されました。]

Just an FYI, the Context Contributors tutorials is now published on LDN.

[6年前 に Jacopo Bartolini によって更新されました。]

Did you reported this bug? Because I'm trying too to use this feature... I'm trying to inject some elements from some portlets that I made, to use in the meta-tags, but it does not seem to work as intended.