/*
* 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.Message;
import org.springframework.messaging.support.MessageBuilder;
/**
* A metric message sent via Spring Integration.
*
* @author Phillip Webb
*/
class MetricMessage {
private static final String METRIC_NAME = "metricName";
private static final String DELETE = "delete";
private final Message<?> message;
MetricMessage(Message<?> message) {
this.message = message;
}
public boolean isReset() {
return DELETE.equals(getPayload());
}
public Object getPayload() {
return this.message.getPayload();
}
public String getMetricName() {
return this.message.getHeaders().get(METRIC_NAME, String.class);
}
public static Message<?> forIncrement(Delta<?> delta) {
return forPayload(delta.getName(), delta);
}
public static Message<?> forSet(Metric<?> value) {
return forPayload(value.getName(), value);
}
public static Message<?> forReset(String metricName) {
return forPayload(metricName, DELETE);
}
private static Message<?> forPayload(String metricName, Object payload) {
MessageBuilder<Object> builder = MessageBuilder.withPayload(payload);
builder.setHeader(METRIC_NAME, metricName);
return builder.build();
}
}