com.hubspot.imap.ImapClientFactoryConfigurationIF Maven / Gradle / Ivy

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package com.hubspot.imap;

import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.google.common.util.concurrent.ThreadFactoryBuilder;
import io.netty.channel.Channel;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.epoll.EpollMode;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.util.concurrent.DefaultEventExecutorGroup;
import io.netty.util.concurrent.EventExecutorGroup;
import java.util.concurrent.ThreadFactory;
import org.immutables.value.Value.Default;
import org.immutables.value.Value.Immutable;
import org.immutables.value.Value.Style;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@Immutable
@Style(typeAbstract = { "*IF" }, typeImmutable = "*")
@JsonDeserialize(as = ImapClientFactoryConfiguration.class)
@JsonSerialize(as = ImapClientFactoryConfiguration.class)
public interface ImapClientFactoryConfigurationIF {
  @Default
  default EventLoopGroup eventLoopGroup() {
    return new NioEventLoopGroup();
  }

  @Default
  default EventExecutorGroup executor() {
    Logger logger = LoggerFactory.getLogger("imap-executor");
    ThreadFactory threadFactory = new ThreadFactoryBuilder()
      .setDaemon(true)
      .setUncaughtExceptionHandler((t, e) ->
        logger.error("Uncaught exception on thread {}", t.getName(), e)
      )
      .setNameFormat("imap-executor-%d")
      .build();

    int nThreads = Runtime.getRuntime().availableProcessors() * 2;
    return new DefaultEventExecutorGroup(nThreads, threadFactory);
  }

  @Default
  default Class channelClass() {
    return NioSocketChannel.class;
  }

  @Default
  default EpollMode epollMode() {
    return EpollMode.EDGE_TRIGGERED;
  }
}