topic Re: when OnContentRead behavior trigger in Alfresco Archive

when OnContentRead behavior trigger

kevinchen — Thu, 17 Nov 2016 03:50:02 GMT

hi everyone: I want to implement Click through rate of a content , I use the sample "ContentHitsAspect" public class ContentHitsAspect implements ContentServicePolicies.OnContentReadPolicy, ContentServicePolicies.OnConte

Re: when OnContentRead behavior trigger

kaynezhang — Thu, 17 Nov 2016 07:15:14 GMT

Every time when the content is read by the content reader form content store.

Re: when OnContentRead behavior trigger

afaust — Thu, 17 Nov 2016 08:56:54 GMT

Minor correction: The OnContentRead policy is triggered when a reader is obtained from the ContentService. The policy does not require that the content is actually read.

Re: when OnContentRead behavior trigger

kevinchen — Thu, 17 Nov 2016 09:15:00 GMT

hi,do you know how to display content download count

Key idea is we need to catch the event which occurs during download action happen.In this example we are invoking our piece of code whenever download API is called from core services.

i don't know how to do this

Re: when OnContentRead behavior trigger

afaust — Thu, 17 Nov 2016 09:54:32 GMT

Download will also cause the OnContentRead policy but the problem is that one download can cause multiple invocations of the OnContentRead policy because clients may download chunks of a file in multiple requests (progressive loading).

Re: when OnContentRead behavior trigger

kevinchen — Thu, 29 Dec 2016 07:46:34 GMT

i found PDF can trigger it every time,but PNG WORD...can't trigger every time when visit URL document-details?nodeRef= any suggestion

Re: when OnContentRead behavior trigger

afaust — Thu, 29 Dec 2016 11:19:20 GMT

Contents may also be cached by the client and thus not cause an additional OnContentRead. Also if previews are shown in document-details then the OnContentRead will occur on the preview, not the document (e.g. Word) itself.

Re: when OnContentRead behavior trigger

kevinchen — Fri, 30 Dec 2016 02:06:45 GMT

thanks Axel ,but how can i catch the preview OnContentRead event ? ‌

i think the preview is the cmdf ,so i bind QName.createQName("http://www.alfresco.org/model/content/1.0", "thumbnail"), but can't trigger the OnContentRead event

this.policyComponent.bindClassBehaviour( ContentServicePolicies.OnContentReadPolicy.QNAME,TYPE_CONTENT_HITS,new JavaBehaviour(this, "onContentRead"));

if(!nodeName.equals("doclib")&&type.equals(TYPE_CONTENT_HITS)){
NodeRef parentNodeRef= nodeService.getPrimaryParent(nodeRef).getParentRef();
Set<QName> aspectSet=nodeService.getAspects(parentNodeRef);
for(QName aspect:aspectSet){
if(aspect.equals(ASPECT_CONTENT_HITS)){
Runnable runnable = new ContentHitsReadCountIncrementer(parentNodeRef,tenantService.getCurrentUserDomain());
threadExecuter.execute(runnable);
}
}
}

Re: when OnContentRead behavior trigger

kaynezhang — Fri, 30 Dec 2016 10:48:19 GMT

OnContentReadPolicy is triggered automaticly when a reader is obtained from the ContentService,but it will be not get triggerd from an exist content writer.
So following line will have no use.
this.policyComponent.bindClassBehaviour( ContentServicePolicies.OnContentReadPolicy.QNAME,TYPE_CONTENT_HITS,new JavaBehaviour(this, "onContentRead"));

The reason why you can't catch OnContentRead event ,I guess it is because of following reason:

When you preview the pdf ,alfresco will try to generate the pdf file first(if not generated) and write it to renditin node ,and the reader is obtained from an existing content writer , so OnContentReadPolicy wiil not be triggered .

Re: when OnContentRead behavior trigger

kevinchen — Tue, 10 Jan 2017 03:53:02 GMT

finally, i implement it by webscript when click download button , I modify the action link to javascript

Re: when OnContentRead behavior trigger

kaynezhang — Tue, 10 Jan 2017 04:47:43 GMT

Good luck.