/*
* Copyright 2009 Geir Magnusson Jr.
*
* 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 voldemort.store.noop;
import voldemort.VoldemortException;
import voldemort.routing.RoutingStrategy;
import voldemort.server.VoldemortConfig;
import voldemort.store.StorageConfiguration;
import voldemort.store.StorageEngine;
import voldemort.store.StoreDefinition;
import voldemort.utils.ByteArray;
/**
* A storage engine that does nothing. To use :
*
* a) add the following to server.properties
*
* storage.configs = voldemort.store.noop.NoopStorageConfiguration,
* voldemort.store.bdb.BdbStorageConfiguration
*
* b) use "noop" as the store type in stores.xml
*
*
*/
public class NoopStorageConfiguration implements StorageConfiguration {
public static final String TYPE_NAME = "noop";
/*
* property for store.properties to set value reflect (return data sent to
* it) is a boolean so set to true if you want this
*/
public static final String REFLECT_PROPERTY = "noop.reflect";
protected boolean reflect;
public NoopStorageConfiguration(VoldemortConfig config) {
reflect = config.getAllProps().getBoolean(REFLECT_PROPERTY, false);
}
public StorageEngine<ByteArray, byte[], byte[]> getStore(StoreDefinition storeDef,
RoutingStrategy strategy) {
return new NoopStorageEngine(storeDef.getName(), reflect);
}
public String getType() {
return TYPE_NAME;
}
public void close() {}
public void update(StoreDefinition storeDef) {
throw new VoldemortException("Storage config updates not permitted for "
+ this.getClass().getCanonicalName());
}
// Nothing to do here: we're not tracking the created storage engine.
@Override
public void removeStorageEngine(StorageEngine<ByteArray, byte[], byte[]> engine) {}
}