chore: Cleanup examples-grails3-database-per-tenant

- `AnotherBookService`: Make `save()` method use passed book title
- `Application`: Remove unused imports and old comment
- `application.yml`: Format properly with 2 spaces and group config settings better
- `logback.xml`: Correct faulty pattern
- `build.gradle`: Use correct dependencies and narrow the scopes. Apply Gradle plugins in subproject instead of having logic and conditions in the root build file apply them - much easier to see what's being applied.

Author: matrei

examples/grails3-database-per-tenant/build.gradle

@@ -1,41 +1,32 @@
-group "examples"
-
-configurations.all {
-    resolutionStrategy.eachDependency { DependencyResolveDetails details ->
-    }
+plugins {
+    id 'com.bertramlabs.asset-pipeline' version '5.0.1'
+    id 'groovy'
+    id 'org.grails.grails-gsp'
+    id 'org.grails.grails-web'
 }
 
-grails {
-    agent {
-        enabled = false
-    }
-}
+version = rootProject.version
+group = 'examples'
 
 dependencies {
-    implementation "org.springframework.boot:spring-boot-starter-logging"
-    implementation "org.springframework.boot:spring-boot-autoconfigure"
-    implementation "org.springframework.boot:spring-boot-starter-actuator"
-    implementation "org.springframework.boot:spring-boot-starter-tomcat"
-    implementation "jakarta.servlet:jakarta.servlet-api"
-    implementation "org.grails:grails-core"
-    implementation "org.grails:grails-dependencies", {
-        exclude module:'grails-datastore-simple'
-    }
-    implementation "org.ysb33r.gradle:grolifant80:$grolifantVersion"
-    implementation "org.grails:grails-web-boot"
-    implementation project(":grails-plugin")
-
 
-    implementation "org.hibernate:hibernate-core-jakarta:$hibernateVersion"
+    implementation project(':grails-plugin')
+    implementation 'org.grails:grails-core'
+    implementation 'org.grails:grails-plugin-rest'
+    implementation 'org.grails.plugins:gsp'
 
-    runtimeOnly "com.bertramlabs.plugins:asset-pipeline-grails"
-    runtimeOnly "com.h2database:h2"
-    runtimeOnly "org.yaml:snakeyaml"
-    runtimeOnly "org.apache.tomcat:tomcat-jdbc"
-    runtimeOnly "org.grails.plugins:fields"
-    runtimeOnly "org.grails.plugins:scaffolding"
+    runtimeOnly 'com.bertramlabs.plugins:asset-pipeline-grails'
+    runtimeOnly 'com.h2database:h2'
+    runtimeOnly 'com.zaxxer:HikariCP'
+    runtimeOnly 'org.grails:grails-plugin-databinding'
+    runtimeOnly 'org.grails:grails-plugin-i18n'
+    runtimeOnly 'org.grails:grails-plugin-services'
+    runtimeOnly 'org.grails:grails-plugin-url-mappings'
+    runtimeOnly 'org.grails.plugins:fields'
+    runtimeOnly 'org.springframework.boot:spring-boot-autoconfigure'
+    runtimeOnly 'org.springframework.boot:spring-boot-starter-logging'
+    runtimeOnly 'org.springframework.boot:spring-boot-starter-tomcat'
 
-    testImplementation ("org.grails:grails-gorm-testing-support") {
-        exclude group: "org.spockframework", module: "spock-core"
-    }
+    testImplementation 'org.grails:grails-gorm-testing-support'
+    testImplementation 'org.spockframework:spock-core'
 }

examples/grails3-database-per-tenant/grails-app/conf/application.yml

@@ -1,90 +1,77 @@
----
-grails:
-    profile: web
-    codegen:
-        defaultPackage: datasources
 info:
-    app:
-        name: '@info.app.name@'
-        version: '@info.app.version@'
-        grailsVersion: '@info.app.grailsVersion@'
-spring:
-  groovy:
-        template:
-            check-template-location: false
-  main:
-    allow-circular-references: true
-
+  app:
+    name: '@info.app.name@'
+    version: '@info.app.version@'
+    grailsVersion: '@info.app.grailsVersion@'
 ---
 grails:
-    mime:
-        disable:
-            accept:
-                header:
-                    userAgents:
-                        - Gecko
-                        - WebKit
-                        - Presto
-                        - Trident
-        types:
-            all: '*/*'
-            atom: application/atom+xml
-            css: text/css
-            csv: text/csv
-            form: application/x-www-form-urlencoded
-            html:
-              - text/html
-              - application/xhtml+xml
-            js: text/javascript
-            json:
-              - application/json
-              - text/json
-            multipartForm: multipart/form-data
-            rss: application/rss+xml
-            text: text/plain
-            hal:
-              - application/hal+json
-              - application/hal+xml
-            xml:
-              - text/xml
-              - application/xml
-    urlmapping:
-        cache:
-            maxsize: 1000
-    controllers:
-        defaultScope: singleton
-    converters:
-        encoding: UTF-8
-    hibernate:
-        cache:
-            queries: false
-    views:
-        default:
-            codec: html
-        gsp:
-            encoding: UTF-8
-            htmlcodec: xml
-            codecs:
-                expression: html
-                scriptlets: html
-                taglib: none
-                staticparts: none
-
+  profile: web
+  codegen:
+    defaultPackage: datasources
+  mime:
+    disable:
+      accept:
+        header:
+          userAgents:
+            - Gecko
+            - WebKit
+            - Presto
+            - Trident
+    types:
+      all: '*/*'
+      atom: application/atom+xml
+      css: text/css
+      csv: text/csv
+      form: application/x-www-form-urlencoded
+      html:
+        - text/html
+        - application/xhtml+xml
+      js: text/javascript
+      json:
+        - application/json
+        - text/json
+      multipartForm: multipart/form-data
+      rss: application/rss+xml
+      text: text/plain
+      hal:
+        - application/hal+json
+        - application/hal+xml
+      xml:
+        - text/xml
+        - application/xml
+  urlmapping:
+    cache:
+      maxsize: 1000
+  converters:
+    encoding: UTF-8
+  hibernate:
+    cache:
+      queries: false
+  views:
+    default:
+      codec: html
+    gsp:
+      encoding: UTF-8
+      htmlcodec: xml
+      codecs:
+        expression: html
+        scriptlets: html
+        taglib: none
+        staticparts: none
 ---
 grails:
   gorm:
     multiTenancy:
       mode: DATABASE
       tenantResolverClass: org.grails.datastore.mapping.multitenancy.web.SessionTenantResolver
+---
 dataSource:
   pooled: true
-  jmxExport: true
   driverClassName: org.h2.Driver
   dbCreate: create-drop
   url: jdbc:h2:mem:books;LOCK_TIMEOUT=10000;DB_CLOSE_ON_EXIT=FALSE
-
 dataSources:
-    moreBooks:
-        url: jdbc:h2:mem:moreBooks;LOCK_TIMEOUT=10000;DB_CLOSE_ON_EXIT=FALSE
-    evenMoreBooks:
-        url: jdbc:h2:mem:evenMoreBooks;LOCK_TIMEOUT=10000;DB_CLOSE_ON_EXIT=FALSE
+  moreBooks:
+    url: jdbc:h2:mem:moreBooks;LOCK_TIMEOUT=10000;DB_CLOSE_ON_EXIT=FALSE
+  evenMoreBooks:
+    url: jdbc:h2:mem:evenMoreBooks;LOCK_TIMEOUT=10000;DB_CLOSE_ON_EXIT=FALSE

examples/grails3-database-per-tenant/grails-app/conf/logback.xml

@@ -7,7 +7,7 @@
     <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
         <encoder>
             <charset>UTF-8</charset>
-            <pattern>'%clr(%d{yyyy-MM-dd HH:mm:ss.SSS}){faint} %clr(%5p) %clr(---){faint} %clr([%15.15t]){faint} %clr(%-40.40logger{39}){cyan} %clr(:){faint} %m%n%wex'</pattern>
+            <pattern>%clr(%d{yyyy-MM-dd HH:mm:ss.SSS}){faint} %clr(%5p) %clr(---){faint} %clr([%15.15t]){faint} %clr(%-40.40logger{39}){cyan} %clr(:){faint} %m%n%wex</pattern>
         </encoder>
     </appender>
 

examples/grails3-database-per-tenant/grails-app/init/datasources/Application.groovy

@@ -3,10 +3,7 @@ package datasources
 import grails.boot.GrailsApp
 import grails.boot.config.GrailsAutoConfiguration
 import groovy.transform.CompileStatic
-import org.springframework.boot.autoconfigure.EnableAutoConfiguration
-import org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration
 
-//@EnableAutoConfiguration(exclude = DataSourceTransactionManagerAutoConfiguration)
 @CompileStatic
 class Application extends GrailsAutoConfiguration {
     static void main(String[] args) {

examples/grails3-database-per-tenant/grails-app/services/example/AnotherBookService.groovy

@@ -10,8 +10,9 @@ import grails.gorm.transactions.Transactional
 @CurrentTenant
 @Transactional
 class AnotherBookService {
-    Book saveBook(String title) {
-        new Book(title: "The Stand").save()
+
+    Book saveBook(String title = 'The Stand') {
+        new Book(title: title).save()
     }
 
     @ReadOnly