chibenwa commented on code in PR #2792: URL: https://github.com/apache/james-project/pull/2792#discussion_r2577340211
########## server/data/data-jmap/src/main/java/org/apache/james/jmap/api/projections/EmailQueryViewUtils.java: ########## @@ -0,0 +1,132 @@ +/**************************************************************** + * 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.jmap.api.projections; + +import java.time.Instant; +import java.util.HashSet; +import java.util.List; +import java.util.Objects; +import java.util.function.Function; + +import org.apache.james.mailbox.model.MessageId; +import org.apache.james.mailbox.model.ThreadId; +import org.apache.james.util.streams.Limit; + +import com.google.common.collect.ImmutableList; + +import reactor.core.publisher.Flux; + +public class EmailQueryViewUtils { + private static final int COLLAPSE_THREADS_LIMIT_MULTIPLIER = 4; + + public static class EmailEntry { + private final MessageId messageId; + private final ThreadId threadId; + private final Instant messageDate; + + public EmailEntry(MessageId messageId, ThreadId threadId, Instant messageDate) { + this.messageId = messageId; + this.threadId = threadId; + this.messageDate = messageDate; + } + + public MessageId getMessageId() { + return messageId; + } + + public ThreadId getThreadId() { + return threadId; + } + + public Instant getMessageDate() { + return messageDate; + } + + @Override + public final boolean equals(Object o) { + if (o instanceof EmailEntry) { + EmailEntry entry = (EmailEntry) o; + + return Objects.equals(this.messageId, entry.messageId) + && Objects.equals(this.threadId, entry.threadId) + && Objects.equals(this.messageDate, entry.messageDate); + } + return false; + } + + @Override + public final int hashCode() { + return Objects.hash(messageId, threadId, messageDate); + } + } + + public static Limit backendLimitFetch(Limit limit, boolean collapseThreads) { + if (collapseThreads) { + return Limit.limit(limit.getLimit().get() * COLLAPSE_THREADS_LIMIT_MULTIPLIER); + } + return limit; + } + + public static Flux<MessageId> messagesWithCollapseThreads(Limit limit, Limit backendFetchLimit, Flux<EmailEntry> baseEntries, Function<Limit, Flux<MessageId>> listMessagesCallbackFunction) { Review Comment: I did have a try at simplifying this and am really happy with the current result. BTW I was initially relctant to share code between the PG and cassandra app but after playing with it end up really liking the idea. Well done @Arsnael . -- 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]
