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Make the number of Netty worker threads number configurable #468

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Make the number of Netty worker threads number configurable #468

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1 change: 1 addition & 0 deletions broker/src/main/java/io/moquette/BrokerConstants.java
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Original file line number Diff line number Diff line change
Expand Up @@ -71,6 +71,7 @@ public final class BrokerConstants {
public static final String NETTY_EPOLL_PROPERTY_NAME = "netty.epoll";
public static final String NETTY_MAX_BYTES_PROPERTY_NAME = "netty.mqtt.message_size";
public static final int DEFAULT_NETTY_MAX_BYTES_IN_MESSAGE = 8092;
public static final String NETTY_WORKER_THREADS = "netty.worker_threads";
public static final String IMMEDIATE_BUFFER_FLUSH_PROPERTY_NAME = "immediate_buffer_flush";
public static final String METRICS_ENABLE_PROPERTY_NAME = "use_metrics";
public static final String METRICS_LIBRATO_EMAIL_PROPERTY_NAME = "metrics.librato.email";
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15 changes: 13 additions & 2 deletions broker/src/main/java/io/moquette/broker/NewNettyAcceptor.java
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Expand Up @@ -146,17 +146,28 @@ public void initialize(NewNettyMQTTHandler mqttHandler, IConfig props, ISslConte
nettyChannelTimeoutSeconds = props.intProp(BrokerConstants.NETTY_CHANNEL_TIMEOUT_SECONDS_PROPERTY_NAME, 10);
maxBytesInMessage = props.intProp(BrokerConstants.NETTY_MAX_BYTES_PROPERTY_NAME,
BrokerConstants.DEFAULT_NETTY_MAX_BYTES_IN_MESSAGE);
int nettyWorkerThreads = props.intProp(BrokerConstants.NETTY_WORKER_THREADS, 0);

boolean epoll = props.boolProp(BrokerConstants.NETTY_EPOLL_PROPERTY_NAME, false);
if (epoll) {
LOG.info("Netty is using Epoll");
bossGroup = new EpollEventLoopGroup();
workerGroup = new EpollEventLoopGroup();
if (nettyWorkerThreads == 0) {
workerGroup = new EpollEventLoopGroup();
}
else {
workerGroup = new EpollEventLoopGroup(nettyWorkerThreads);
}
channelClass = EpollServerSocketChannel.class;
} else {
LOG.info("Netty is using NIO");
bossGroup = new NioEventLoopGroup();
workerGroup = new NioEventLoopGroup();
if (nettyWorkerThreads == 0) {
workerGroup = new NioEventLoopGroup();
}
else {
workerGroup = new NioEventLoopGroup(nettyWorkerThreads);
}
channelClass = NioServerSocketChannel.class;
}

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