io.reactivex.netty.examples.http.sse.HelloSseServer Maven / Gradle / Ivy
/*
* Copyright 2015 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.http.sse;
import io.netty.buffer.ByteBuf;
import io.netty.handler.logging.LogLevel;
import io.reactivex.netty.examples.ExamplesEnvironment;
import io.reactivex.netty.protocol.http.server.HttpServer;
import rx.Observable;
import java.util.concurrent.TimeUnit;
import static io.reactivex.netty.protocol.http.sse.ServerSentEvent.*;
/**
* An Server sent event "Hello World" example server.
*
* This server send an infinite Server Sent Event stream for any request that it recieves. The infinite stream publishes
* an event every 10 milliseconds, with the event data as "Interval => [count starting with 0]"
*/
public final class HelloSseServer {
public static void main(final String[] args) {
ExamplesEnvironment env = ExamplesEnvironment.newEnvironment(HelloSseServer.class);
HttpServer server;
server = HttpServer.newServer()
.enableWireLogging("sse-server", LogLevel.DEBUG)
.start((req, resp) ->
resp.transformToServerSentEvents()
.writeAndFlushOnEach(Observable.interval(10, TimeUnit.MILLISECONDS)
.onBackpressureBuffer(10)
.map(aLong -> withData(
"Interval => " + aLong)))
);
/*Wait for shutdown if not called from the client (passed an arg)*/
if (env.shouldWaitForShutdown(args)) {
server.awaitShutdown();
}
/*If not waiting for shutdown, assign the ephemeral port used to a field so that it can be read and used by
the caller, if any.*/
env.registerServerAddress(server.getServerAddress());
}
}