/*
* RHQ Management Platform
* Copyright (C) 2011 Red Hat, Inc.
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
package org.rhq.core.pc.drift.sync;
import static org.rhq.core.domain.drift.DriftDefinitionComparator.CompareMode.BOTH_BASE_INFO_AND_DIRECTORY_SPECIFICATIONS;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.rhq.core.domain.drift.DriftDefinition;
import org.rhq.core.domain.drift.DriftDefinitionComparator;
import org.rhq.core.pc.drift.DriftDetectionSchedule;
import org.rhq.core.pc.drift.DriftManager;
import org.rhq.core.pc.drift.ScheduleQueue;
/**
* As its name implies, this class synchronizes drift definitions at runtime. By runtime
* we mean when {@link DriftManager} is fully initialized. Updating the local inventory is
* done through DriftManager. When this class determines that a drift definition needs
* to be purged from the local inventory, it does so by calling DriftManager to unschedule
* drift detection. Likewise when this class determines that a drift definition needs
* to be added to the local inventory, it does so by calling DriftManager to schedule
* detection.
* <br/><br/>
* Note that inventory sync happens regularly after the plugin container is initialized.
* Discovery scans are performed at fixed intervals. The results of a discovery scan are
* reported to the server, and the server sends back {@link org.rhq.core.domain.discovery.OldResourceSyncInfo resource sync info}
* which is then used to sync with the local inventory.
*/
class RuntimeSynchronizer implements DriftSynchronizer {
private final Log log = LogFactory.getLog(RuntimeSynchronizer.class);
private DriftManager driftMgr;
public RuntimeSynchronizer(DriftManager driftManager) {
driftMgr = driftManager;
}
@Override
public List<DriftDefinition> getDeletedDefinitions(int resourceId, Set<DriftDefinition> definitionsFromServer) {
log.debug("Checking for drift definitions that need to be deleted for resource id " + resourceId);
List<DriftDefinition> deleted = new LinkedList<DriftDefinition>();
ScheduleQueue queue = driftMgr.getSchedulesQueue();
for (DriftDetectionSchedule schedule : getSchedulesForResource(resourceId, queue.toArray())) {
if (!definitionsFromServer.contains(schedule.getDriftDefinition())) {
if (log.isDebugEnabled()) {
log.debug("Detected stale drift definition that needs to be purged - "
+ toString(resourceId, schedule.getDriftDefinition()));
}
deleted.add(schedule.getDriftDefinition());
}
}
return deleted;
}
@Override
public void purgeFromLocalInventory(int resourceId, List<DriftDefinition> definitions) {
log.debug("Preparing to unschedule drift detection and purge from local inventory drift definitions "
+ "that have been deleted on the server for resource id " + resourceId);
for (DriftDefinition c : definitions) {
driftMgr.unscheduleDriftDetection(resourceId, c);
}
}
@Override
public List<DriftDefinition> getAddedDefinitions(int resourceId, Set<DriftDefinition> definitionsFromServer) {
log.debug("Checking for drift definitions that need to be added for resource id " + resourceId);
ScheduleQueue queue = driftMgr.getSchedulesQueue();
DriftDefinitionComparator comparator = new DriftDefinitionComparator(
BOTH_BASE_INFO_AND_DIRECTORY_SPECIFICATIONS);
List<DriftDefinition> added = new LinkedList<DriftDefinition>();
for (DriftDefinition c : definitionsFromServer) {
if (!queue.contains(resourceId, c, comparator)) {
if (log.isDebugEnabled()) {
log.debug("Detected new drift definition that needs to be added to local inventory - "
+ toString(resourceId, c));
}
added.add(c);
}
}
return added;
}
@Override
public void addToLocalInventory(int resourceId, List<DriftDefinition> definitions) {
log.debug("Adding drift definitions to local inventory and creating drift detection schedules for "
+ "resource id " + resourceId);
for (DriftDefinition c : definitions) {
if (log.isDebugEnabled()) {
log.debug("Adding " + toString(resourceId, c) + " to local inventory");
}
driftMgr.scheduleDriftDetection(resourceId, c);
}
}
@Override
public void syncChangeSetContent() {
driftMgr.scanForContentToResend();
}
private String toString(int rid, DriftDefinition c) {
return "DriftDefinition[id: " + c.getId() + ", name: " + c.getName() + ", resourceId: " + rid + "]";
}
private List<DriftDetectionSchedule> getSchedulesForResource(int resourceId, DriftDetectionSchedule[] schedules) {
List<DriftDetectionSchedule> resourceSchedules = new LinkedList<DriftDetectionSchedule>();
for (DriftDetectionSchedule s : schedules) {
if (s.getResourceId() == resourceId) {
resourceSchedules.add(s);
}
}
return resourceSchedules;
}
}