Adds CommandHandler trait and ModelCommand base class

data-binding/src/main/scala/org/scalatra/databinding/CommandHandler.scala

@@ -0,0 +1,38 @@
+package org.scalatra
+package databinding
+
+import scala.util.control.Exception.allCatch
+import grizzled.slf4j.Logger
+import validation._
+import scalaz._
+import Scalaz._
+
+trait CommandHandler { 
+  @transient private[this] lazy val logger: Logger = Logger[this.type]
+  def execute[S: Manifest](cmd: ModelCommand[S]): ModelValidation[S] = {
+    logger.debug("Executing [%s].\n%s" format (cmd.getClass.getName, cmd))
+    if (cmd.isValid) {
+      val res = (allCatch withApply (serverError(cmd.getClass.getName, _))) {
+        handle.lift(cmd).map(_.map(_.asInstanceOf[S])) | ValidationError("Don't know how to handle: " + cmd.getClass.getName, UnknownError).failNel
+      }
+      val ftext = "with %d failures\n%s".format(~res.fail.toOption.map(_.list.size), ~res.fail.toOption.map(_.list))
+      logger.debug("Command [%s] executed %s." format (cmd.getClass.getName, res.isSuccess ? "successfully." | ftext))
+      res
+    } else {
+      val f = cmd.errors.map(_.validation) collect {
+        case Failure(e) ⇒ e
+      }
+      logger.debug("Command [%s] executed with %d failures.\n%s" format (cmd.getClass.getName, f.size, f.toList))
+      nel(f.head, f.tail: _*).fail
+    }
+  }
+
+  private[this] def serverError[R](cmdName: String, ex: Throwable): ModelValidation[R] = {
+    logger.error("There was an error while executing " + cmdName, ex)
+    ValidationError("An error occurred while handling: " + cmdName, UnknownError).failNel[R]
+  }
+
+  type Handler = PartialFunction[ModelCommand[_], ModelValidation[_]]
+
+  protected def handle: Handler
+}

data-binding/src/main/scala/org/scalatra/databinding/ModelCommand.scala

@@ -0,0 +1,6 @@
+package org.scalatra
+package databinding
+
+abstract class ModelCommand[T:Manifest] extends Command {
+  type ModelType = T
+}

notes/2.2.0.markdown

@@ -90,6 +90,10 @@
 * the models property in the `SwaggerSupport` can now be Set as `Map(classOf[Pet])`
 * responseClass can now be set with a type annotation `responseClass[Pet]`
 
+### Swagger-Ext
+
+* Adds support for authorization to Swagger.  Shows only actions a user is allowed to see.
+
 ### Testing
 * Added a method `ensureSessionIsSerializable` method which will try to serialize every session value.