swamirishi commented on code in PR #8589: URL: https://github.com/apache/ozone/pull/8589#discussion_r2137833248
########## hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/metadata/ContainerCreateInfo.java: ########## @@ -0,0 +1,141 @@ +/* + * 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.hadoop.ozone.container.metadata; + +import java.util.function.Supplier; +import net.jcip.annotations.Immutable; +import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos; +import org.apache.hadoop.hdds.upgrade.HDDSLayoutFeature; +import org.apache.hadoop.hdds.utils.db.Codec; +import org.apache.hadoop.hdds.utils.db.CodecBuffer; +import org.apache.hadoop.hdds.utils.db.CodecException; +import org.apache.hadoop.hdds.utils.db.DelegatedCodec; +import org.apache.hadoop.hdds.utils.db.Proto3Codec; +import org.apache.hadoop.hdds.utils.db.StringCodec; +import org.apache.hadoop.ozone.container.upgrade.VersionedDatanodeFeatures; +import org.apache.ratis.util.MemoizedSupplier; + +/** + * ContainerCreateInfo is a class that holds information about the state and other information on creation + * This class is immutable. + */ +@Immutable +public final class ContainerCreateInfo { + private static final Codec<ContainerCreateInfo> CODEC = new DelegatedCodec<>( + Proto3Codec.get(ContainerProtos.ContainerCreateInfo.getDefaultInstance()), + ContainerCreateInfo::getFromProtobuf, ContainerCreateInfo::getProtobuf, + ContainerCreateInfo.class); + private static final Codec<ContainerCreateInfo> CODEC_OLD_VERSION = new ContainerCreateInfoCodec(); + + private final ContainerProtos.ContainerDataProto.State state; + private final Supplier<ContainerProtos.ContainerCreateInfo> proto; + + public static Codec<ContainerCreateInfo> getCodec() { + if (VersionedDatanodeFeatures.isFinalized(HDDSLayoutFeature.CONTAINERID_TABLE_SCHEMA_CHANGE)) { + // If the container ID table schema is finalized, we can use the proto3 codec directly. + return CODEC; + } + return CODEC_OLD_VERSION; + } + + private ContainerCreateInfo(ContainerProtos.ContainerDataProto.State state) { + this.state = state; + this.proto = MemoizedSupplier.valueOf( + () -> ContainerProtos.ContainerCreateInfo.newBuilder().setState(state).build()); + } + + /** + * Factory method for creation of ContainerCreateInfo. + * @param state State + * @return ContainerCreateInfo. + */ + public static ContainerCreateInfo valueOf(final ContainerProtos.ContainerDataProto.State state) { + return new ContainerCreateInfo(state); + } + + public ContainerProtos.ContainerCreateInfo getProtobuf() { + return proto.get(); + } + + public static ContainerCreateInfo getFromProtobuf(ContainerProtos.ContainerCreateInfo proto) { + return ContainerCreateInfo.valueOf(proto.getState()); + } + + public ContainerProtos.ContainerDataProto.State getState() { + return state; + } + + /** + * ContainerCreateInfoCodec handles compatibility for containerIds Table, where old format from String is changed + * to proto3 format, ContainerCreateInfo. So this codec can read both formats based on the HDDSLayoutFeature. + * For write case, it will create ContainerCreateInfo in proto3 format, but write is allowed only after the + * finalization of feature. + */ + public static class ContainerCreateInfoCodec implements Codec<ContainerCreateInfo> { Review Comment: It would be wrong to blindly write with proto. What if the code was never upgraded then we should write back as a string. -- 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. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
