RE: Initialize and use object using @Reference of Liferay's Service Classes

2018-12-12T13:26:26Z

Vishal Shah:

Previously, using Liferay's Default Service Builder classes using *LocalServiceUtil and *ServiceUtil in custom portlet. Now I want to initalise and use via @Reference.

I am trying for this another way but object is not initalise and getting NULL.
...
I think any missing from my side. I added below line in gradle :

compileOnly group: 'com.liferay', name: 'com.liferay.knowledge.base.api', version: '5.0.11'

compileOnly group: 'com.liferay', name: 'com.liferay.knowledge.base.service', version: '2.0.20'

I'd expect that you don't have dependency problems, e.g. you can't fix it through gradle. But you probably are using the @Reference in a class that's not a @Component. @Reference needs to be within a @Component to be initialized on deployment. Then, if your component doesn't deploy, you'll need to worry about the dependencies.

Initialize and use object using @Reference of Liferay's Service Classes

2018-12-12T06:51:40Z

Previously, using Liferay's Default Service Builder classes using *LocalServiceUtil and *ServiceUtil in custom portlet. Now I want to initalise and use via @Reference.

I am trying for this another way but object is not initalise and getting NULL.

protected KBArticleService kbArticleService;
protected KBCommentLocalService kbCommentLocalService;

@Reference(unbind = "-")
protected void setKBArticleService(KBArticleService kbArticleService) {
this.kbArticleService = kbArticleService;
}

@Reference(unbind = "-")
protected void setKBCommentLocalService(
KBCommentLocalService kbCommentLocalService) {

this.kbCommentLocalService = kbCommentLocalService;
}

My custome method implemented below code :

kbArticle = kbArticleService.addKBArticle(
               portletId, parentResourceClassNameId, parentResourcePrimKey,
               title, urlTitle, content, description, sourceURL, sections,
               selectedFileNames, serviceContext);

But everytime getting kbArticleService not initalise and getting NULLpointer exception.

I think any missing from my side. I added below line in gradle :

compileOnly group: 'com.liferay', name: 'com.liferay.knowledge.base.api', version: '5.0.11'

compileOnly group: 'com.liferay', name: 'com.liferay.knowledge.base.service', version: '2.0.20'