[SOLVED] Grails Dependency Injection from Service

Grails Dependency Injection from Service

I am trying to injecting my own service elasticsearchService from the following domain class:

class DocumentESO extends ElasticsearchObject{

  ElasticsearchService elasticsearchService

  def afterInsert() {
    elasticsearchService.save(this) // <-- Cannot invoke method save() on null object
  }
}

However, it tells me that it Cannot invoke method save() on null object. Here is my service:

@Transactional
class ElasticsearchService {
    @Transactional
    def save(ElasticsearchObject esObject) {...}
}

Did I misspell something? If I would use ElasticsearchService elasticsearchService = new ElasticsearchService() then it would work, but I don't have the transactional support anymore.

In this answer, robert mentions it needs to initialized, while using meta programming save() for example. Does it mean that I cannot go with dependency injection in this case?

Thus it would be:

  def afterInsert() {
    ElasticsearchService elasticsearchService = new ElasticsearchService()
    elasticsearchService.save(this) 
  }

Solution

Service injection in GORM entities is disabled by default since Grails 3.2.8.

You can turn on autowiring in this one particular domain class by adding to DocumentESO:

static mapping = {
       autowire true
   }

however it's not recommended: https://grails.org/blog/2017-05-09.html