-
-
Save karel1980/84660675dbabaa4a2e4d2198d0858d25 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
/* | |
* 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 <a href="http://www.w3.org/TR/eventsource/">Server sent event</a> "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<ByteBuf, ByteBuf> server; | |
server = HttpServer.newServer(49499) | |
.enableWireLogging("sse-server", LogLevel.DEBUG) | |
.start((req, resp) -> | |
resp.transformToServerSentEvents() | |
.writeAndFlushOnEach(getInterval() | |
.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()); | |
} | |
private static Observable<Long> getInterval() { | |
return Observable.interval(1, TimeUnit.SECONDS) | |
.take(5) | |
.concatWith(Observable.never()) | |
.doOnEach(notification -> log(notification, false)) | |
.doOnSubscribe(() -> log("subscribe", true)) | |
.doOnUnsubscribe(() -> log("unsubscribe", true)); | |
} | |
private static void log(Object something, boolean dumpAMoeder) { | |
System.out.println(Thread.currentThread().getName()); | |
System.out.println(" - " + something); | |
if (dumpAMoeder) { | |
RuntimeException runtimeException = new RuntimeException(); | |
runtimeException.fillInStackTrace(); | |
runtimeException.printStackTrace(); | |
} | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment