/*
* Copyright 2012 LinkedIn, Inc
*
* 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.slow;
import voldemort.VoldemortException;
import voldemort.common.OpTimeMap;
import voldemort.routing.RoutingStrategy;
import voldemort.server.VoldemortConfig;
import voldemort.store.StorageConfiguration;
import voldemort.store.StorageEngine;
import voldemort.store.StoreDefinition;
import voldemort.store.memory.InMemoryStorageEngine;
import voldemort.utils.ByteArray;
/**
* A storage engine that wraps InMemoryStorageEngine with delays.
*
*
*/
public class SlowStorageConfiguration implements StorageConfiguration {
public static final String TYPE_NAME = "slow";
private final VoldemortConfig voldemortConfig;
public SlowStorageConfiguration(VoldemortConfig config) {
this.voldemortConfig = config;
}
public StorageEngine<ByteArray, byte[], byte[]> getStore(StoreDefinition storeDef,
RoutingStrategy strategy) {
if(voldemortConfig != null) {
return new SlowStorageEngine<ByteArray, byte[], byte[]>(new InMemoryStorageEngine<ByteArray, byte[], byte[]>(storeDef.getName()),
this.voldemortConfig.testingGetSlowQueueingDelays(),
this.voldemortConfig.testingGetSlowConcurrentDelays());
}
return new SlowStorageEngine<ByteArray, byte[], byte[]>(new InMemoryStorageEngine<ByteArray, byte[], byte[]>(storeDef.getName()),
new OpTimeMap(0),
new OpTimeMap(0));
}
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) {}
}