/*
* Copyright 2013 the original author or authors.
*
* 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 ratpack.codahale.metrics;
import ratpack.codahale.metrics.internal.MetricRegistryJsonMapper;
import ratpack.codahale.metrics.internal.MetricsBroadcaster;
import ratpack.handling.Context;
import ratpack.handling.Handler;
import static ratpack.stream.Streams.map;
import static ratpack.websocket.WebSockets.websocketBroadcast;
/**
* A Handler that broadcasts metric reports via web sockets.
* <p>
* This handler should be bound to an application path, and most likely only for the GET method…
* <pre class="java-chain-dsl">
* import ratpack.codahale.metrics.MetricsWebsocketBroadcastHandler;
*
* chain instanceof ratpack.handling.Chain;
* chain.get("admin/metrics", new MetricsWebsocketBroadcastHandler());
* </pre>
*/
public class MetricsWebsocketBroadcastHandler implements Handler {
@Override
public void handle(final Context context) throws Exception {
final MetricsBroadcaster broadcaster = context.get(MetricsBroadcaster.class);
final MetricRegistryJsonMapper mapper = context.get(MetricRegistryJsonMapper.class);
websocketBroadcast(
context,
map(broadcaster, mapper)
);
}
}