/*
* Copyright 2012-2015 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 org.springframework.boot.actuate.metrics.writer;
import org.springframework.boot.actuate.metrics.Metric;
import org.springframework.messaging.MessageChannel;
/**
* A {@link MetricWriter} that publishes the metric updates on a {@link MessageChannel}.
* The messages have the writer input ({@link Delta} or {@link Metric}) as payload, and
* carry an additional header "metricName" with the name of the metric in it.
*
* @author Dave Syer
* @see MetricWriterMessageHandler
*/
public class MessageChannelMetricWriter implements MetricWriter {
private final MessageChannel channel;
public MessageChannelMetricWriter(MessageChannel channel) {
this.channel = channel;
}
@Override
public void increment(Delta<?> delta) {
this.channel.send(MetricMessage.forIncrement(delta));
}
@Override
public void set(Metric<?> value) {
this.channel.send(MetricMessage.forSet(value));
}
@Override
public void reset(String metricName) {
this.channel.send(MetricMessage.forReset(metricName));
}
}