| /* |
| * 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 |
| * |
| * 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 org.apache.calcite.avatica.server; |
| |
| import java.util.concurrent.Callable; |
| |
| /** |
| * A callback which the server can invoke to allow implementations to control additional logic |
| * about whether or not a client from a specific host should be run. |
| * <p>For example, complex logic could be supplied to control whether clientA from host1 is |
| * permitted to execute queries. This logic is deferred upon the user to implement. |
| */ |
| public interface DoAsRemoteUserCallback { |
| |
| /** |
| * Invokes the given <code>action</code> as the <code>remoteUserName</code>. |
| * |
| * @param remoteUserName The remote user making a request to the Avatica server. |
| * @param remoteAddress The address the remote user is making the request from. |
| * @param action The operation the Avatica server wants to run as <code>remoteUserName</code>. |
| * @return The result from the Callable. |
| */ |
| <T> T doAsRemoteUser(String remoteUserName, String remoteAddress, Callable<T> action) |
| throws Exception; |
| |
| } |
| |
| // End DoAsRemoteUserCallback.java |