Accept-Version for API versioning

Author: Chris Latimer

grails-app/conf/UrlMappings.groovy

@@ -9,5 +9,7 @@ class UrlMappings {
 
         "/"(view:"/index")
         "500"(view:'/error')
+        "/phones"(version:'1.0', resources:"phone", namespace:'v1')
+        "/phones"(version:'2.0', resources:"phone", namespace:'v2')
 	}
 }

grails-app/controllers/org/gmobile/v1/PhoneController.groovy

@@ -0,0 +1,19 @@
+package org.gmobile.v1
+
+import grails.rest.RestfulController
+import org.gmobile.Phone
+
+class PhoneController extends RestfulController<Phone> {
+    static namespace = 'v1'
+    static responseFormats = ['json', 'xml']
+
+    public PhoneController() {
+        super(Phone)
+    }
+
+    def index() {
+        def obj = ["message" : "v1 has been deprecated"]
+        respond obj
+    }
+
+}

grails-app/controllers/org/gmobile/v2/PhoneController.groovy

@@ -0,0 +1,15 @@
+package org.gmobile.v2
+
+import grails.converters.JSON
+import grails.rest.RestfulController
+import org.gmobile.Phone
+
+class PhoneController extends RestfulController<Phone> {
+    static namespace = 'v2'
+    static responseFormats = ['json', 'xml']
+
+    public PhoneController() {
+        super(Phone)
+    }
+
+}

test/unit/gmobile/PhoneControllerSpec.groovy

@@ -0,0 +1,21 @@
+package gmobile
+
+import grails.test.mixin.TestFor
+import org.gmobile.v1.PhoneController
+import spock.lang.Specification
+
+/**
+ * See the API for {@link grails.test.mixin.web.ControllerUnitTestMixin} for usage instructions
+ */
+@TestFor(PhoneController)
+class PhoneControllerSpec extends Specification {
+
+    def setup() {
+    }
+
+    def cleanup() {
+    }
+
+    void "test something"() {
+    }
+}

test/unit/org/gmobile/v2/PhoneControllerSpec.groovy

@@ -0,0 +1,20 @@
+package org.gmobile.v2
+
+import grails.test.mixin.TestFor
+import spock.lang.Specification
+
+/**
+ * See the API for {@link grails.test.mixin.web.ControllerUnitTestMixin} for usage instructions
+ */
+@TestFor(PhoneController)
+class PhoneControllerSpec extends Specification {
+
+    def setup() {
+    }
+
+    def cleanup() {
+    }
+
+    void "test something"() {
+    }
+}