org.springframework.boot.actuate.metrics.web.jetty.JettyServerThreadPoolMetricsBinder Maven / Gradle / Ivy
/*
* Copyright 2012-2018 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
*
* https://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.web.jetty;
import java.util.Collections;
import io.micrometer.core.instrument.MeterRegistry;
import io.micrometer.core.instrument.Tag;
import io.micrometer.core.instrument.binder.jetty.JettyServerThreadPoolMetrics;
import org.eclipse.jetty.util.thread.ThreadPool;
import org.springframework.boot.context.event.ApplicationStartedEvent;
import org.springframework.boot.web.context.WebServerApplicationContext;
import org.springframework.boot.web.embedded.jetty.JettyWebServer;
import org.springframework.boot.web.server.WebServer;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationListener;
/**
* Binds {@link JettyServerThreadPoolMetrics} in response to the
* {@link ApplicationStartedEvent}.
*
* @author Andy Wilkinson
* @since 2.1.0
*/
public class JettyServerThreadPoolMetricsBinder
implements ApplicationListener {
private final MeterRegistry meterRegistry;
private final Iterable tags;
public JettyServerThreadPoolMetricsBinder(MeterRegistry meterRegistry) {
this(meterRegistry, Collections.emptyList());
}
public JettyServerThreadPoolMetricsBinder(MeterRegistry meterRegistry,
Iterable tags) {
this.meterRegistry = meterRegistry;
this.tags = tags;
}
@Override
public void onApplicationEvent(ApplicationStartedEvent event) {
ApplicationContext applicationContext = event.getApplicationContext();
ThreadPool threadPool = findThreadPool(applicationContext);
if (threadPool != null) {
new JettyServerThreadPoolMetrics(threadPool, this.tags)
.bindTo(this.meterRegistry);
}
}
private ThreadPool findThreadPool(ApplicationContext applicationContext) {
if (applicationContext instanceof WebServerApplicationContext) {
WebServer webServer = ((WebServerApplicationContext) applicationContext)
.getWebServer();
if (webServer instanceof JettyWebServer) {
return ((JettyWebServer) webServer).getServer().getThreadPool();
}
}
return null;
}
}