| /* |
| * 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.core.impl.scheduling; |
| |
| import org.apache.felix.hc.core.impl.executor.HealthCheckExecutorThreadPool; |
| import org.osgi.service.component.annotations.Component; |
| import org.osgi.service.component.annotations.Deactivate; |
| import org.osgi.service.component.annotations.Reference; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** Component without direct quartz imports (can always start) that will provide a QuartzCronScheduler on demand. */ |
| @Component(service = QuartzCronSchedulerProvider.class) |
| public class QuartzCronSchedulerProvider { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(QuartzCronSchedulerProvider.class); |
| private static final String CLASS_FROM_QUARTZ_FRAMEWORK = "org.quartz.CronTrigger"; |
| |
| private QuartzCronScheduler quartzCronScheduler = null; |
| |
| @Reference |
| HealthCheckExecutorThreadPool healthCheckExecutorThreadPool; |
| |
| public synchronized QuartzCronScheduler getQuartzCronScheduler() throws ClassNotFoundException { |
| if (quartzCronScheduler == null) { |
| if (classExists(CLASS_FROM_QUARTZ_FRAMEWORK)) { |
| quartzCronScheduler = new QuartzCronScheduler(healthCheckExecutorThreadPool); |
| LOG.info("Created quartz scheduler health check core bundle"); |
| } else { |
| throw new ClassNotFoundException("Class " + CLASS_FROM_QUARTZ_FRAMEWORK |
| + " was not found (install quartz library into classpath)"); |
| } |
| } |
| return quartzCronScheduler; |
| } |
| |
| @Deactivate |
| protected synchronized void deactivate() { |
| if (quartzCronScheduler != null) { |
| quartzCronScheduler.shutdown(); |
| quartzCronScheduler = null; |
| LOG.info("QuartzCronScheduler shutdown"); |
| } |
| } |
| |
| private boolean classExists(String className) { |
| try { |
| Class.forName(className); |
| return true; |
| } catch (ClassNotFoundException e) { |
| return false; |
| } |
| } |
| } |