How to set a timeout in Spring 5 WebFlux WebClient
To set the read and connect timeout I use the method below, because the SO_TIMEOUT option is not available for channels using NIO (and giving the warning Unknown channel option 'SO_TIMEOUT' for channel '[id: 0xa716fcb2]'
)
ReactorClientHttpConnector connector = new ReactorClientHttpConnector(
options -> options.option(ChannelOption.CONNECT_TIMEOUT_MILLIS, 2000)
.compression(true)
.afterNettyContextInit(ctx -> {
ctx.addHandlerLast(new ReadTimeoutHandler(5000, TimeUnit.MILLISECONDS));
}));
return WebClient.builder()
.clientConnector(connector)
.build();
ReactorClientHttpConnector API changed in version Spring WebFlux 5.1.
So I do the following (Kotlin syntax, based on @joshiste example):
val tcpClient = TcpClient.create()
.option(ChannelOption.CONNECT_TIMEOUT_MILLIS, 10_000)
.doOnConnected { connection ->
connection.addHandlerLast(ReadTimeoutHandler(10))
.addHandlerLast(WriteTimeoutHandler(10))
}
val myWebClient = webClientBuilder
.clientConnector(ReactorClientHttpConnector(HttpClient.from(tcpClient)))
.baseUrl(myEndPoint)
.build()
UPDATE 2021
HttpClient.from in deprecated in last version of Reactive Netty. It was copying the configuration of the tcpClient. Now we can configure httpClient directly.
val httpClient = HttpClient.create()
.option(ChannelOption.CONNECT_TIMEOUT_MILLIS, 10_000)
.doOnConnected { connection ->
connection.addHandlerLast(ReadTimeoutHandler(10))
.addHandlerLast(WriteTimeoutHandler(10))
}
val myWebClient = webClientBuilder
.clientConnector(ReactorClientHttpConnector(httpClient))
.baseUrl(myEndPoint)
.build()