| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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.apache.felix.metrics.osgi.consumers.impl.log; |
| |
| import java.util.List; |
| import java.util.stream.Collectors; |
| |
| import org.apache.felix.metrics.osgi.BundleStartDuration; |
| import org.apache.felix.metrics.osgi.ServiceRestartCounter; |
| import org.apache.felix.metrics.osgi.StartupMetrics; |
| import org.apache.felix.metrics.osgi.StartupMetricsListener; |
| import org.osgi.service.component.annotations.Activate; |
| import org.osgi.service.component.annotations.Component; |
| import org.osgi.service.metatype.annotations.AttributeDefinition; |
| import org.osgi.service.metatype.annotations.Designate; |
| import org.osgi.service.metatype.annotations.ObjectClassDefinition; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| @Component |
| @Designate(ocd = LoggingMetricsListener.Config.class) |
| public class LoggingMetricsListener implements StartupMetricsListener { |
| |
| @ObjectClassDefinition(name = "Apache Felix Logging Startup Metrics Listener") |
| public @interface Config { |
| |
| @AttributeDefinition(name = "Service Restart Threshold", description="Minimum number of service restarts during startup needed log the number of service restarts") |
| int serviceRestartThreshold() default 3; |
| @AttributeDefinition(name = "Slow Bundle Startup Threshold", description="Minimum bundle startup duration in milliseconds needed to log the bundle startup time") |
| long slowBundleThresholdMillis() default 200; |
| } |
| |
| private int serviceRestartThreshold; |
| private long slowBundleThresholdMillis; |
| |
| @Activate |
| protected void activate(Config cfg) { |
| this.serviceRestartThreshold = cfg.serviceRestartThreshold(); |
| this.slowBundleThresholdMillis = cfg.slowBundleThresholdMillis(); |
| } |
| |
| @Override |
| public void onStartupComplete(StartupMetrics event) { |
| Logger log = LoggerFactory.getLogger(getClass()); |
| log.info("Application startup completed in {}", event.getStartupTime()); |
| |
| List<BundleStartDuration> slowStartBundles = event.getBundleStartDurations().stream() |
| .filter( bsd -> bsd.getStartedAfter().toMillis() >= slowBundleThresholdMillis ) |
| .collect(Collectors.toList()); |
| |
| if ( !slowStartBundles.isEmpty() && log.isInfoEnabled() ) { |
| StringBuilder logEntry = new StringBuilder(); |
| logEntry.append("The following bundles started in more than ") |
| .append(slowBundleThresholdMillis) |
| .append(" milliseconds: \n"); |
| slowStartBundles |
| .forEach( ssb -> logEntry.append("- ").append(ssb.getSymbolicName()).append(" : ").append(ssb.getStartedAfter()).append('\n')); |
| |
| log.info(logEntry.toString()); |
| } |
| |
| List<ServiceRestartCounter> oftenRestartedServices = event.getServiceRestarts().stream() |
| .filter( src -> src.getServiceRestarts() >= serviceRestartThreshold ) |
| .collect(Collectors.toList()); |
| |
| if ( !oftenRestartedServices.isEmpty() && log.isInfoEnabled() ) { |
| StringBuilder logEntry = new StringBuilder(); |
| logEntry.append("The following services have restarted more than ") |
| .append(serviceRestartThreshold) |
| .append(" times during startup :\n"); |
| oftenRestartedServices |
| .forEach(ors -> logEntry.append("- ").append(ors.getServiceIdentifier()).append(" : ").append(ors.getServiceRestarts()).append(" restarts\n")); |
| |
| log.info(logEntry.toString()); |
| } |
| } |
| |
| } |