bharatviswa504 commented on a change in pull request #1044: HDDS-1731. Implement File CreateFile Request to use Cache and DoubleBuffer. URL: https://github.com/apache/hadoop/pull/1044#discussion_r299762555
########## File path: hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/request/file/OMFileCreateRequest.java ########## @@ -0,0 +1,348 @@ +/** + * 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 + * <p> + * http://www.apache.org/licenses/LICENSE-2.0 + * <p> + * 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.hadoop.ozone.om.request.file; + +import java.io.IOException; +import java.nio.file.Path; +import java.nio.file.Paths; +import java.util.ArrayList; +import java.util.Iterator; +import java.util.List; +import java.util.Map; +import java.util.stream.Collectors; +import javax.annotation.Nonnull; + +import com.google.common.base.Preconditions; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import org.apache.hadoop.fs.FileEncryptionInfo; +import org.apache.hadoop.hdds.protocol.proto.HddsProtos; +import org.apache.hadoop.hdds.scm.container.common.helpers.ExcludeList; +import org.apache.hadoop.ozone.audit.OMAction; +import org.apache.hadoop.ozone.om.OMMetadataManager; +import org.apache.hadoop.ozone.om.OMMetrics; +import org.apache.hadoop.ozone.om.OzoneManager; +import org.apache.hadoop.ozone.om.exceptions.OMException; +import org.apache.hadoop.ozone.om.helpers.OmBucketInfo; +import org.apache.hadoop.ozone.om.helpers.OmKeyInfo; +import org.apache.hadoop.ozone.om.helpers.OmKeyLocationInfo; +import org.apache.hadoop.ozone.om.request.key.OMKeyCreateRequest; +import org.apache.hadoop.ozone.om.request.key.OMKeyRequest; +import org.apache.hadoop.ozone.om.response.OMClientResponse; +import org.apache.hadoop.ozone.protocol.proto.OzoneManagerProtocolProtos + .CreateFileRequest; +import org.apache.hadoop.ozone.protocol.proto.OzoneManagerProtocolProtos + .KeyArgs; +import org.apache.hadoop.ozone.protocol.proto.OzoneManagerProtocolProtos + .OMRequest; +import org.apache.hadoop.ozone.security.acl.IAccessAuthorizer; +import org.apache.hadoop.ozone.security.acl.OzoneObj; +import org.apache.hadoop.util.Time; +import org.apache.hadoop.utils.UniqueId; +import org.apache.hadoop.utils.db.Table; +import org.apache.hadoop.utils.db.TableIterator; +import org.apache.hadoop.utils.db.cache.CacheKey; +import org.apache.hadoop.utils.db.cache.CacheValue; + + +import static org.apache.hadoop.ozone.om.request.file.OMFileRequest.OMDirectoryResult.DIRECTORY_EXISTS; +import static org.apache.hadoop.ozone.om.request.file.OMFileRequest.OMDirectoryResult.DIRECTORY_EXISTS_IN_GIVENPATH; +import static org.apache.hadoop.ozone.om.request.file.OMFileRequest.OMDirectoryResult.FILE_EXISTS_IN_GIVENPATH; +import static org.apache.hadoop.ozone.om.request.file.OMFileRequest.OMDirectoryResult.FILE_EXISTS; +import static org.apache.hadoop.ozone.om.lock.OzoneManagerLock.Resource.BUCKET_LOCK; +import static org.apache.hadoop.ozone.om.request.file.OMFileRequest.OMDirectoryResult.NONE; + +/** + * Handles create file request. + */ +public class OMFileCreateRequest extends OMKeyCreateRequest + implements OMKeyRequest { + + private static final Logger LOG = + LoggerFactory.getLogger(OMFileCreateRequest.class); + public OMFileCreateRequest(OMRequest omRequest) { + super(omRequest); + } + + + @Override + public OMRequest preExecute(OzoneManager ozoneManager) throws IOException { + CreateFileRequest createFileRequest = getOmRequest().getCreateFileRequest(); + Preconditions.checkNotNull(createFileRequest); + + KeyArgs keyArgs = createFileRequest.getKeyArgs(); + + if (keyArgs.getKeyName().length() == 0) { + // Check if this is the root of the filesystem. + // Not throwing exception here, as need to throw exception after + // checking volume/bucket exists. + return getOmRequest().toBuilder().setUserInfo(getUserInfo()).build(); + } + + long scmBlockSize = ozoneManager.getScmBlockSize(); + + // NOTE size of a key is not a hard limit on anything, it is a value that + // client should expect, in terms of current size of key. If client sets + // a value, then this value is used, otherwise, we allocate a single + // block which is the current size, if read by the client. + final long requestedSize = keyArgs.getDataSize() > 0 ? + keyArgs.getDataSize() : scmBlockSize; + + boolean useRatis = ozoneManager.shouldUseRatis(); + + HddsProtos.ReplicationFactor factor = keyArgs.getFactor(); + if (factor == null) { + factor = useRatis ? HddsProtos.ReplicationFactor.THREE : Review comment: Yes. With Ratis, replication factor 1 and 3 are supported. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. 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