/*
* Copyright 2016 Red Hat, Inc. and/or its affiliates
* and other contributors as indicated by the @author tags.
*
* 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.keycloak.services.scheduled;
import org.jboss.logging.Logger;
import org.keycloak.cluster.ClusterProvider;
import org.keycloak.cluster.ExecutionResult;
import org.keycloak.models.KeycloakSession;
import org.keycloak.models.KeycloakSessionFactory;
import org.keycloak.timer.ScheduledTask;
import java.util.concurrent.Callable;
/**
* Ensures that there are not concurrent executions of same task (either on this host or any other cluster host)
*
* @author <a href="mailto:mposolda@redhat.com">Marek Posolda</a>
*/
public class ClusterAwareScheduledTaskRunner extends ScheduledTaskRunner {
private static final Logger logger = Logger.getLogger(ClusterAwareScheduledTaskRunner.class);
private final int intervalSecs;
public ClusterAwareScheduledTaskRunner(KeycloakSessionFactory sessionFactory, ScheduledTask task, long intervalMillis) {
super(sessionFactory, task);
this.intervalSecs = (int) (intervalMillis / 1000);
}
@Override
protected void runTask(final KeycloakSession session) {
session.getTransactionManager().begin();
ClusterProvider clusterProvider = session.getProvider(ClusterProvider.class);
String taskKey = task.getClass().getSimpleName();
ExecutionResult<Void> result = clusterProvider.executeIfNotExecuted(taskKey, intervalSecs, new Callable<Void>() {
@Override
public Void call() throws Exception {
task.run(session);
return null;
}
});
session.getTransactionManager().commit();
if (result.isExecuted()) {
logger.debugf("Executed scheduled task %s", taskKey);
} else {
logger.debugf("Skipped execution of task %s as other cluster node is executing it", taskKey);
}
}
}