Import code from internal repository to git

java/com/google/domain/registry/flows/session/LogoutFlow.java

@@ -0,0 +1,34 @@
+// Copyright 2016 Google Inc. All Rights Reserved.
+//
+// Licensed 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
+//
+//     http://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 com.google.domain.registry.flows.session;
+
+import static com.google.domain.registry.model.eppoutput.Result.Code.SuccessAndClose;
+
+import com.google.domain.registry.flows.EppException;
+import com.google.domain.registry.flows.LoggedInFlow;
+import com.google.domain.registry.model.eppoutput.EppOutput;
+
+/**
+ * An EPP flow for logout.
+ *
+ * @error {@link com.google.domain.registry.flows.LoggedInFlow.NotLoggedInException}
+ */
+public class LogoutFlow extends LoggedInFlow {
+  @Override
+  public final EppOutput run() throws EppException {
+    sessionMetadata.invalidate();
+    return createOutput(SuccessAndClose);
+  }
+}