/**
* Copyright (C) 2009-2012 the original author or authors.
* See the notice.md file distributed with this work for additional
* information regarding copyright ownership.
*
* 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.fusesource.restygwt.client.cache;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Logger;
import com.google.gwt.http.client.Response;
import com.google.gwt.logging.client.LogConfiguration;
import com.google.gwt.user.client.Timer;
public class VolatileQueueableCacheStorage extends DefaultQueueableCacheStorage {
/**
* how long will a cachekey be allowed to exist
*/
private static final int DEFAULT_LIFETIME_MS = 30 * 1000;
private final int lifetimeMillis;
public VolatileQueueableCacheStorage(){
this(DEFAULT_LIFETIME_MS);
}
public VolatileQueueableCacheStorage(int lifetimeMillis){
this.lifetimeMillis = lifetimeMillis;
}
private final List<Timer> timers = new ArrayList<Timer>();
@Override
protected void putResult(final CacheKey key, final Response response, final String scope) {
final Timer t = new Timer() {
@Override
public void run() {
try {
if (LogConfiguration.loggingIsEnabled()) {
Logger.getLogger(VolatileQueueableCacheStorage.class.getName())
.finer("removing cache-key " + key + " from scope \"" + scope + "\"");
}
cache.get(scope).remove(key);
timers.remove(this);
} catch (Exception ex) {
Logger.getLogger(VolatileQueueableCacheStorage.class.getName())
.severe(ex.getMessage());
}
}
};
t.schedule(lifetimeMillis);
timers.add(t);
super.putResult(key, response, scope);
}
@Override
public void purge() {
super.purge();
if (LogConfiguration.loggingIsEnabled()) {
Logger.getLogger(DefaultQueueableCacheStorage.class.getName()).finer("remove "
+ timers.size() + " timers from list.");
}
for (Timer t: timers) {
t.cancel();
}
timers.clear();
}
}