/*
*
* *
* * 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 ASF 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.usergrid.persistence.core.migration.data;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import com.google.inject.Inject;
import com.google.inject.Singleton;
@Singleton
public class MigrationInfoCacheImpl implements MigrationInfoCache{
/**
* Cache to cache versions temporarily
*/
private final LoadingCache<String, Integer> versionCache = CacheBuilder.newBuilder()
//cache the local value for 1 minute
.expireAfterWrite( 1, TimeUnit.MINUTES ).build( new CacheLoader<String, Integer>() {
@Override
public Integer load( final String key ) throws Exception {
return migrationInfoSerialization.getVersion( key );
}
} );
private final MigrationInfoSerialization migrationInfoSerialization;
@Inject
public MigrationInfoCacheImpl( final MigrationInfoSerialization migrationInfoSerialization ) {
this.migrationInfoSerialization = migrationInfoSerialization;
}
@Override
public void invalidateAll() {
versionCache.invalidateAll();
}
@Override
public void setVersion( final String pluginName, final int version ) {
migrationInfoSerialization.setVersion( pluginName, version );
versionCache.invalidate( pluginName );
}
@Override
public int getVersion( final String pluginName ) {
try {
return versionCache.get( pluginName );
}
catch ( ExecutionException e ) {
throw new RuntimeException("Unable to get cached version for plugin name " + pluginName);
}
}
}