jdaugherty commented on code in PR #14953:
URL: https://github.com/apache/grails-core/pull/14953#discussion_r2316280268


##########
grails-domain-class/src/main/groovy/org/grails/plugins/domain/GrailsDomainClassAutoConfiguration.groovy:
##########
@@ -0,0 +1,87 @@
+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one
+ *  or more contributor license agreements.  See the NOTICE file
+ *  distributed with this work for additional information
+ *  regarding copyright ownership.  The ASF licenses this file
+ *  to you under the Apache License, Version 2.0 (the
+ *  "License"); you may not use this file except in compliance
+ *  with the License.  You may obtain a copy of the License at
+ *
+ *    https://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing,
+ *  software distributed under the License is distributed on an
+ *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ *  KIND, either express or implied.  See the License for the
+ *  specific language governing permissions and limitations
+ *  under the License.
+ */
+
+package org.grails.plugins.domain
+
+import grails.core.GrailsApplication
+import grails.validation.ConstraintsEvaluator
+import groovy.transform.CompileStatic
+import 
org.grails.datastore.gorm.validation.constraints.factory.ConstraintFactory
+import org.grails.datastore.mapping.model.MappingContext
+import org.grails.plugins.domain.support.ConstraintEvaluatorAdapter
+import org.grails.plugins.domain.support.DefaultConstraintEvaluatorFactoryBean
+import org.grails.plugins.domain.support.DefaultMappingContextFactoryBean
+import org.grails.plugins.domain.support.ValidatorRegistryFactoryBean
+import org.grails.plugins.i18n.I18nAutoConfiguration
+import org.springframework.beans.factory.annotation.Autowired
+import org.springframework.beans.factory.annotation.Qualifier
+import org.springframework.boot.autoconfigure.AutoConfiguration
+import 
org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication
+import org.springframework.context.ApplicationContext
+import org.springframework.context.MessageSource
+import org.springframework.context.annotation.Bean
+import org.springframework.context.annotation.Lazy
+
+@CompileStatic
+// TODO: datasource plugin is supposed to always load after this (currently 
will because this is a configuration)
+@AutoConfiguration(after = [I18nAutoConfiguration])
+@ConditionalOnWebApplication(type = ConditionalOnWebApplication.Type.SERVLET)
+class GrailsDomainClassAutoConfiguration {
+
+    @Autowired
+    GrailsApplication grailsApplication
+
+    @Autowired
+    ApplicationContext applicationContext
+
+    @Autowired
+    List<MessageSource> messageSources
+
+    @Lazy
+    @Bean('grailsDomainClassMappingContext')
+    DefaultMappingContextFactoryBean grailsDomainClassMappingContext(
+            List<ConstraintFactory> constraintFactories
+    ) {
+        def bean = new DefaultMappingContextFactoryBean(grailsApplication, 
messageSources)
+        bean.constraintFactories = constraintFactories ?: []
+        bean
+    }
+
+    @Lazy
+    @Bean
+    DefaultConstraintEvaluatorFactoryBean 
validateableConstraintsEvaluator(@Qualifier('grailsDomainClassMappingContext') 
MappingContext grailsDomainClassMappingContext) {
+
+        new DefaultConstraintEvaluatorFactoryBean(messageSources, 
grailsDomainClassMappingContext, grailsApplication)
+    }
+
+    @Lazy
+    @Bean(name = ConstraintsEvaluator.BEAN_NAME)
+    ConstraintEvaluatorAdapter 
constraintsEvaluator(DefaultConstraintEvaluatorFactoryBean 
validateableConstraintsEvaluator) {
+        def bean = new 
ConstraintEvaluatorAdapter(validateableConstraintsEvaluator.getObject())
+        bean
+    }

Review Comment:
   As a best practice, we should either have the variable name match the bean 
name or we should use qualifier.  I'd rather jsut leave the variable name in 
this case.



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