Java tutorial
/* * Copyright 2015 herd contributors * * 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 org.finra.herd.tools.common.databridge; import org.apache.commons.lang3.StringUtils; import org.springframework.beans.factory.annotation.Autowired; import org.finra.herd.model.dto.DataBridgeBaseManifestDto; import org.finra.herd.model.jpa.StorageEntity; import org.finra.herd.service.S3Service; /** * A base class for the uploader and downloader controller. This class is abstract since it is not an actual controller, but just a help class that provides * common base functionality that should be used by an extending class. */ public abstract class DataBridgeController { public static final Integer MAX_THREADS = 100; // Maximum number of threads to be used by the Amazon S3 TransferManager. public static final Integer MIN_THREADS = 3; // Minimum number of threads to be used by the Amazon S3 TransferManager. @Autowired protected S3Service s3Service; /** * Adjusts an Integer value according to the specified range of values. * * @param origValue the original value to be adjusted * @param minValue the minimum value of the range * @param maxValue the maximum value of the range * * @return the value adjusted per the specified range of values */ protected Integer adjustIntegerValue(Integer origValue, Integer minValue, Integer maxValue) { Integer resultValue = origValue; if (resultValue.compareTo(minValue) < 0) { resultValue = minValue; } if (resultValue.compareTo(maxValue) > 0) { resultValue = maxValue; } return resultValue; } /** * Gets the storage name from a databridge manifest. Defaults to {@link StorageEntity#MANAGED_STORAGE S3 managed storage} when manifest does not specify a * storage name. The storage name is whitespace trimmed. * * @param manifest Databridge manifest * * @return The storage name */ protected String getStorageNameFromManifest(DataBridgeBaseManifestDto manifest) { String storageName; if (StringUtils.isNotBlank(manifest.getStorageName())) { storageName = manifest.getStorageName().trim(); } else { storageName = StorageEntity.MANAGED_STORAGE; } return storageName; } }