/*
* (C) Copyright 2014 Nuxeo SAS (http://nuxeo.com/) and contributors.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the GNU Lesser General Public License
* (LGPL) version 2.1 which accompanies this distribution, and is available at
* http://www.gnu.org/licenses/lgpl-2.1.html
*
* This library 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
* Lesser General Public License for more details.
*
* Contributors:
* Maxime Hilaire
*
*/
package org.nuxeo.ecm.core.cache;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.nuxeo.runtime.model.ContributionFragmentRegistry;
/**
* Registry to register cache
*
* @since 6.0
*/
public final class CacheRegistry extends
ContributionFragmentRegistry<CacheDescriptor> {
private static final Log log = LogFactory.getLog(CacheRegistry.class);
// map of cache
protected final Map<String, CacheDescriptor> caches = new HashMap<String, CacheDescriptor>();
@Override
public String getContributionId(CacheDescriptor contrib) {
return contrib.name;
}
@Override
public void contributionUpdated(String id, CacheDescriptor descriptor,
CacheDescriptor newOrigContrib) {
String name = descriptor.name;
if (name == null) {
throw new RuntimeException("The cache name must not be null!");
}
if (descriptor.remove) {
contributionRemoved(id, descriptor);
return;
}
if (caches.containsKey(name)) {
throw new IllegalStateException(
String.format(
"Another cache has already been registered for the given name %s",
name));
}
caches.put(name, descriptor);
log.info("cache registered: " + name);
}
@Override
public boolean isSupportingMerge() {
return false;
}
@Override
public void contributionRemoved(String id, CacheDescriptor origContrib) {
String name = origContrib.name;
CacheDescriptor cache = caches.remove(name);
if (cache == null) {
throw new IllegalStateException("No such cache registered" + name);
}
try {
cache.stop();
} catch (RuntimeException e) {
log.error(String.format("Error while removing cache '%s'", name), e);
}
log.info("cache removed: " + name);
}
@Override
public CacheDescriptor clone(CacheDescriptor orig) {
return orig.clone();
}
@Override
public void merge(CacheDescriptor src, CacheDescriptor dst) {
boolean remove = src.remove;
// keep old remove info: if old contribution was removed, new one
// should replace the old one completely
if (remove) {
dst.remove = remove;
// don't bother merging
return;
}
}
public CacheAttributesChecker getCache(String name) {
if(caches.containsKey(name))
{
return caches.get(name).cacheChecker;
}
return null;
}
public List<CacheAttributesChecker> getCaches() {
List<CacheAttributesChecker> res = new ArrayList<CacheAttributesChecker>(
caches.size());
for (CacheDescriptor desc : caches.values()) {
res.add(desc.cacheChecker);
}
return res;
}
public void start() {
RuntimeException errors = new RuntimeException(
"Cannot start caches, check suppressed error");
for (CacheDescriptor desc : caches.values()) {
try {
desc.start();
} catch (RuntimeException cause) {
errors.addSuppressed(cause);
}
}
if (errors.getSuppressed().length > 0) {
throw errors;
}
}
public void stop() {
RuntimeException errors = new RuntimeException(
"Cannot stop caches, check suppressed error");
for (CacheDescriptor desc : caches.values()) {
try {
desc.stop();
} catch (RuntimeException cause) {
errors.addSuppressed(cause);
}
}
if (errors.getSuppressed().length > 0) {
throw errors;
}
}
}