Java tutorial
/* * Copyright 2014-2019 the original author or authors. * * 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 * * https://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.springframework.integration.file.remote; /** * {@code RemoteFileTemplate} callback with the underlying client instance providing * access to lower level methods. * * @author Gary Russell * * @param <C> The type of the underlying client object. * @param <T> The return type of the callback method. * @since 4.1 * */ @FunctionalInterface public interface ClientCallback<C, T> { /** * Called within the context of a * {@link org.springframework.integration.file.remote.session.Session}. Perform some * operation(s) on the client instance underlying the session. The caller will take * care of closing the session after this method exits. However, the implementation is * required to perform any clean up required by the client after performing * operations. * @param client The client instance. * @return The return value. */ T doWithClient(C client); }