io.reactivex.netty.examples.udp.HelloUdpClient Maven / Gradle / Ivy
/*
* Copyright 2014 Netflix, Inc.
*
* Licensed 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 io.reactivex.netty.examples.udp;
import io.netty.channel.socket.DatagramPacket;
import io.netty.handler.logging.LogLevel;
import io.reactivex.netty.RxNetty;
import io.reactivex.netty.channel.ObservableConnection;
import rx.Observable;
import rx.functions.Func1;
import java.nio.charset.Charset;
import static io.reactivex.netty.examples.udp.HelloUdpServer.DEFAULT_PORT;
/**
* @author Nitesh Kant
*/
public final class HelloUdpClient {
private final int port;
public HelloUdpClient(int port) {
this.port = port;
}
public String sendHello() {
String content = RxNetty.newUdpClientBuilder("localhost", port)
.enableWireLogging(LogLevel.ERROR).build().connect()
.flatMap(new Func1,
Observable>() {
@Override
public Observable call(ObservableConnection connection) {
connection.writeStringAndFlush("Is there anybody out there?");
return connection.getInput();
}
})
.take(1)
.map(new Func1() {
@Override
public String call(DatagramPacket datagramPacket) {
return datagramPacket.content().toString(Charset.defaultCharset());
}
})
.toBlocking()
.first();
System.out.println("Received: " + content);
return content;
}
public static void main(String[] args) {
new HelloUdpClient(DEFAULT_PORT).sendHello();
}
}