| /* |
| * 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 SF 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.hc.generalchecks; |
| |
| import java.lang.management.ManagementFactory; |
| |
| import javax.management.Attribute; |
| import javax.management.AttributeList; |
| import javax.management.InstanceNotFoundException; |
| import javax.management.MBeanServer; |
| import javax.management.MalformedObjectNameException; |
| import javax.management.ObjectName; |
| import javax.management.ReflectionException; |
| |
| import org.apache.felix.hc.annotation.HealthCheckService; |
| import org.apache.felix.hc.api.FormattingResultLog; |
| import org.apache.felix.hc.api.HealthCheck; |
| import org.apache.felix.hc.api.Result; |
| import org.apache.felix.hc.api.ResultLog; |
| import org.osgi.service.component.annotations.Activate; |
| import org.osgi.service.component.annotations.Component; |
| import org.osgi.service.component.annotations.ConfigurationPolicy; |
| 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; |
| |
| @HealthCheckService(name = CpuCheck.HC_NAME) |
| @Component(configurationPolicy = ConfigurationPolicy.REQUIRE) |
| @Designate(ocd = CpuCheck.Config.class, factory = false) |
| public class CpuCheck implements HealthCheck { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(CpuCheck.class); |
| |
| public static final String HC_NAME = "CPU"; |
| public static final String HC_LABEL = "Health Check: " + HC_NAME; |
| |
| @ObjectClassDefinition(name = HC_LABEL, description = "Checks for high CPU load") |
| public @interface Config { |
| @AttributeDefinition(name = "Name", description = "Name of this health check") |
| String hc_name() default HC_NAME; |
| |
| @AttributeDefinition(name = "Tags", description = "List of tags for this health check, used to select subsets of health checks for execution e.g. by a composite health check.") |
| String[] hc_tags() default {}; |
| |
| @AttributeDefinition(name = "CPU usage threshold for WARN", description = "in percent, if CPU usage is over this limit the result is WARN") |
| long cpuPercentageThresholdWarn() default 95; |
| |
| } |
| |
| private long cpuPercentageThresholdWarn; |
| |
| @Activate |
| protected void activate(final Config config) { |
| cpuPercentageThresholdWarn = config.cpuPercentageThresholdWarn(); |
| LOG.debug("Activated CPU HC: cpuPercentageThresholdWarn={}%", cpuPercentageThresholdWarn); |
| } |
| |
| @Override |
| public Result execute() { |
| |
| FormattingResultLog log = new FormattingResultLog(); |
| |
| double processCpuLoad = Double.NaN; |
| try { |
| processCpuLoad = getProcessCpuLoad(); |
| } catch (Exception e) { |
| log.add(new ResultLog.Entry(Result.Status.HEALTH_CHECK_ERROR, "Could not get process CPU load: " + e, e)); |
| } |
| |
| if (Double.isNaN(processCpuLoad)) { |
| log.info("No CPU load available yet"); |
| } else { |
| String loadStr = String.format("%.1f", processCpuLoad); |
| Result.Status status = processCpuLoad < cpuPercentageThresholdWarn ? Result.Status.OK : Result.Status.WARN; |
| log.add(new ResultLog.Entry(status, "Process CPU Usage: " + loadStr + "%")); |
| } |
| return new Result(log); |
| |
| } |
| |
| public double getProcessCpuLoad() throws MalformedObjectNameException, ReflectionException, InstanceNotFoundException { |
| |
| MBeanServer mbs = ManagementFactory.getPlatformMBeanServer(); |
| ObjectName name = ObjectName.getInstance("java.lang:type=OperatingSystem"); |
| AttributeList list = mbs.getAttributes(name, new String[] { "ProcessCpuLoad" }); |
| |
| if (list.isEmpty()) { |
| return Double.NaN; |
| } |
| |
| Attribute att = (Attribute) list.get(0); |
| Double value = (Double) att.getValue(); |
| |
| if (value == -1.0) { |
| return Double.NaN; |
| } |
| |
| return value * 100; |
| } |
| |
| } |