chibenwa commented on code in PR #1918: URL: https://github.com/apache/james-project/pull/1918#discussion_r1450380768
########## mailbox/postgres/src/main/java/org/apache/james/mailbox/postgres/mail/PostgresMessageIdMapper.java: ########## @@ -0,0 +1,279 @@ +/**************************************************************** + * 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.james.mailbox.postgres.mail; + +import static org.apache.james.blob.api.BlobStore.StoragePolicy.LOW_COST; +import static org.apache.james.blob.api.BlobStore.StoragePolicy.SIZE_BASED; +import static org.apache.james.mailbox.postgres.mail.PostgresMessageModule.MessageTable.BODY_BLOB_ID; +import static org.apache.james.mailbox.postgres.mail.PostgresMessageModule.MessageTable.HEADER_CONTENT; + +import java.io.IOException; +import java.io.InputStream; +import java.time.Clock; +import java.util.Collection; +import java.util.Date; +import java.util.List; +import java.util.function.Function; + +import javax.mail.Flags; + +import org.apache.commons.lang3.tuple.Pair; +import org.apache.james.backends.postgres.utils.PostgresUtils; +import org.apache.james.blob.api.BlobId; +import org.apache.james.blob.api.BlobStore; +import org.apache.james.mailbox.MessageManager; +import org.apache.james.mailbox.MessageUid; +import org.apache.james.mailbox.ModSeq; +import org.apache.james.mailbox.exception.MailboxException; +import org.apache.james.mailbox.exception.MailboxNotFoundException; +import org.apache.james.mailbox.model.ComposedMessageIdWithMetaData; +import org.apache.james.mailbox.model.Content; +import org.apache.james.mailbox.model.HeaderAndBodyByteContent; +import org.apache.james.mailbox.model.Mailbox; +import org.apache.james.mailbox.model.MailboxId; +import org.apache.james.mailbox.model.MessageId; +import org.apache.james.mailbox.model.UpdatedFlags; +import org.apache.james.mailbox.postgres.PostgresMailboxId; +import org.apache.james.mailbox.postgres.PostgresMessageId; +import org.apache.james.mailbox.postgres.mail.dao.PostgresMailboxDAO; +import org.apache.james.mailbox.postgres.mail.dao.PostgresMailboxMessageDAO; +import org.apache.james.mailbox.postgres.mail.dao.PostgresMessageDAO; +import org.apache.james.mailbox.store.FlagsUpdateCalculator; +import org.apache.james.mailbox.store.MailboxReactorUtils; +import org.apache.james.mailbox.store.mail.MessageIdMapper; +import org.apache.james.mailbox.store.mail.MessageMapper; +import org.apache.james.mailbox.store.mail.model.MailboxMessage; +import org.apache.james.mailbox.store.mail.model.impl.SimpleMailboxMessage; +import org.apache.james.util.ReactorUtils; +import org.jooq.Record; +import org.reactivestreams.Publisher; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import com.google.common.collect.ImmutableList; +import com.google.common.collect.ImmutableListMultimap; +import com.google.common.collect.Multimap; +import com.google.common.io.ByteSource; + +import reactor.core.publisher.Flux; +import reactor.core.publisher.Mono; + +public class PostgresMessageIdMapper implements MessageIdMapper { + private static final Function<MailboxMessage, ByteSource> MESSAGE_BODY_CONTENT_LOADER = (mailboxMessage) -> new ByteSource() { + @Override + public InputStream openStream() { + try { + return mailboxMessage.getBodyContent(); + } catch (IOException e) { + throw new RuntimeException(e); + } + } + + @Override + public long size() { + return mailboxMessage.getBodyOctets(); + } + }; + + public static final int NUM_RETRIES = 5; + public static final Logger LOGGER = LoggerFactory.getLogger(PostgresMessageIdMapper.class); + + private final PostgresMailboxDAO mailboxDAO; + private final PostgresMessageDAO messageDAO; + private final PostgresMailboxMessageDAO mailboxMessageDAO; + private final PostgresModSeqProvider modSeqProvider; + private final BlobStore blobStore; + private final BlobId.Factory blobIdFactory; + private final Clock clock; + + public PostgresMessageIdMapper(PostgresMailboxDAO mailboxDAO, PostgresMessageDAO messageDAO, + PostgresMailboxMessageDAO mailboxMessageDAO, PostgresModSeqProvider modSeqProvider, + BlobStore blobStore, BlobId.Factory blobIdFactory, + Clock clock) { + this.mailboxDAO = mailboxDAO; + this.messageDAO = messageDAO; + this.mailboxMessageDAO = mailboxMessageDAO; + this.modSeqProvider = modSeqProvider; + this.blobStore = blobStore; + this.blobIdFactory = blobIdFactory; + this.clock = clock; + } + + @Override + public List<MailboxMessage> find(Collection<MessageId> messageIds, MessageMapper.FetchType fetchType) { + return findReactive(messageIds, fetchType) + .collectList() + .block(); + } + + @Override + public Publisher<ComposedMessageIdWithMetaData> findMetadata(MessageId messageId) { + return mailboxMessageDAO.findMetadataByMessageId(PostgresMessageId.class.cast(messageId)); + } + + @Override + public Flux<MailboxMessage> findReactive(Collection<MessageId> messageIds, MessageMapper.FetchType fetchType) { + return mailboxMessageDAO.findMessagesByMessageIds(messageIds.stream().map(PostgresMessageId.class::cast).collect(ImmutableList.toImmutableList()), + fetchType) + .flatMap(messageBuilderAndRecord -> { + SimpleMailboxMessage.Builder messageBuilder = messageBuilderAndRecord.getLeft(); + if (fetchType == MessageMapper.FetchType.FULL) { + return retrieveFullContent(messageBuilderAndRecord.getRight()) + .map(headerAndBodyContent -> messageBuilder.content(headerAndBodyContent).build()); + } + return Mono.just(messageBuilder.build()); + }, ReactorUtils.DEFAULT_CONCURRENCY); + } + + @Override + public List<MailboxId> findMailboxes(MessageId messageId) { + return mailboxMessageDAO.findMailboxes(PostgresMessageId.class.cast(messageId)) + .collect(ImmutableList.toImmutableList()) + .block(); + } + + @Override + public void save(MailboxMessage mailboxMessage) throws MailboxException { + PostgresMailboxId mailboxId = PostgresMailboxId.class.cast(mailboxMessage.getMailboxId()); + mailboxMessage.setSaveDate(Date.from(clock.instant())); + MailboxReactorUtils.block(mailboxDAO.findMailboxById(mailboxId) + .switchIfEmpty(Mono.error(() -> new MailboxNotFoundException(mailboxId))) + .then(saveBodyContent(mailboxMessage)) + .flatMap(blobId -> messageDAO.insert(mailboxMessage, blobId.asString()) + .onErrorResume(PostgresUtils.UNIQUE_CONSTRAINT_VIOLATION_PREDICATE, e -> Mono.empty())) + .then(mailboxMessageDAO.insert(mailboxMessage))); + } + + @Override + public void copyInMailbox(MailboxMessage mailboxMessage, Mailbox mailbox) throws MailboxException { + MailboxReactorUtils.block(copyInMailboxReactive(mailboxMessage, mailbox)); + } + + @Override + public Mono<Void> copyInMailboxReactive(MailboxMessage mailboxMessage, Mailbox mailbox) { + mailboxMessage.setSaveDate(Date.from(clock.instant())); + PostgresMailboxId mailboxId = (PostgresMailboxId) mailbox.getMailboxId(); + return mailboxMessageDAO.insert(mailboxMessage, mailboxId) + .onErrorResume(PostgresUtils.UNIQUE_CONSTRAINT_VIOLATION_PREDICATE, e -> Mono.empty()); + } + + @Override + public void delete(MessageId messageId) { + mailboxMessageDAO.deleteByMessageId((PostgresMessageId) messageId).block(); + } + + @Override + public void delete(MessageId messageId, Collection<MailboxId> mailboxIds) { + mailboxMessageDAO.deleteByMessageIdAndMailboxIds((PostgresMessageId) messageId, + mailboxIds.stream().map(PostgresMailboxId.class::cast).collect(ImmutableList.toImmutableList())).block(); + } + + @Override + public Mono<Multimap<MailboxId, UpdatedFlags>> setFlags(MessageId messageId, List<MailboxId> mailboxIds, Flags newState, MessageManager.FlagsUpdateMode updateMode) { + return Flux.fromIterable(mailboxIds) + .distinct() + .map(PostgresMailboxId.class::cast) + .concatMap(mailboxId -> flagsUpdateWithRetry(newState, updateMode, mailboxId, messageId)) + .collect(ImmutableListMultimap.toImmutableListMultimap(Pair::getLeft, Pair::getRight)); + } + + private Flux<Pair<MailboxId, UpdatedFlags>> flagsUpdateWithRetry(Flags newState, MessageManager.FlagsUpdateMode updateMode, MailboxId mailboxId, MessageId messageId) { + return updateFlags(mailboxId, messageId, newState, updateMode) + .retry(NUM_RETRIES) + .onErrorResume(MailboxDeleteDuringUpdateException.class, e -> { + LOGGER.info("Mailbox {} was deleted during flag update", mailboxId); + return Mono.empty(); + }) + .flatMapIterable(Function.identity()) + .map(pair -> buildUpdatedFlags(pair.getRight(), pair.getLeft())); + } + + private Pair<MailboxId, UpdatedFlags> buildUpdatedFlags(ComposedMessageIdWithMetaData composedMessageIdWithMetaData, Flags oldFlags) { + return Pair.of(composedMessageIdWithMetaData.getComposedMessageId().getMailboxId(), + UpdatedFlags.builder() + .uid(composedMessageIdWithMetaData.getComposedMessageId().getUid()) + .messageId(composedMessageIdWithMetaData.getComposedMessageId().getMessageId()) + .modSeq(composedMessageIdWithMetaData.getModSeq()) + .oldFlags(oldFlags) + .newFlags(composedMessageIdWithMetaData.getFlags()) + .build()); + } + + private Mono<List<Pair<Flags, ComposedMessageIdWithMetaData>>> updateFlags(MailboxId mailboxId, MessageId messageId, Flags newState, MessageManager.FlagsUpdateMode updateMode) { + PostgresMailboxId postgresMailboxId = (PostgresMailboxId) mailboxId; + PostgresMessageId postgresMessageId = (PostgresMessageId) messageId; + return mailboxMessageDAO.findMetadataByMessageId(postgresMessageId, postgresMailboxId) + .flatMap(oldComposedId -> updateFlags(newState, updateMode, postgresMailboxId, oldComposedId), ReactorUtils.DEFAULT_CONCURRENCY) + .switchIfEmpty(Mono.error(MailboxDeleteDuringUpdateException::new)) + .collectList(); + } + + private Mono<Pair<Flags, ComposedMessageIdWithMetaData>> updateFlags(Flags newState, MessageManager.FlagsUpdateMode updateMode, PostgresMailboxId mailboxId, ComposedMessageIdWithMetaData oldComposedId) { + FlagsUpdateCalculator flagsUpdateCalculator = new FlagsUpdateCalculator(newState, updateMode); + Flags newFlags = flagsUpdateCalculator.buildNewFlags(oldComposedId.getFlags()); + if (identicalFlags(oldComposedId, newFlags)) { + return Mono.just(Pair.of(oldComposedId.getFlags(), oldComposedId)); + } else { + return modSeqProvider.nextModSeqReactive(mailboxId) + .flatMap(newModSeq -> { + // TODO bug? + // ModSeq previousModseq = oldComposedId.getModSeq(); Review Comment: If this works you can remove the comment IMO -- This is an automated message from the Apache Git Service. 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