EvictionListeningReadWriteLockedPinningIT.java

/* 
 * Copyright 2015 Terracotta, Inc., a Software AG company.
 *
 * 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.terracotta.offheapstore.pinning;

import org.terracotta.offheapstore.pinning.PinnableCache;
import static org.terracotta.offheapstore.util.MemoryUnit.KILOBYTES;

import java.util.concurrent.Callable;

import org.junit.internal.AssumptionViolatedException;

import org.terracotta.offheapstore.eviction.EvictionListener;
import org.terracotta.offheapstore.eviction.EvictionListeningReadWriteLockedOffHeapClockCache;
import org.terracotta.offheapstore.paging.PageSource;
import org.terracotta.offheapstore.storage.IntegerStorageEngine;
import org.terracotta.offheapstore.storage.OffHeapBufferStorageEngine;
import org.terracotta.offheapstore.storage.PointerSize;
import org.terracotta.offheapstore.storage.SplitStorageEngine;
import org.terracotta.offheapstore.storage.StorageEngine;
import org.terracotta.offheapstore.storage.portability.ByteArrayPortability;
import org.terracotta.offheapstore.storage.portability.SerializablePortability;

import org.hamcrest.core.Is;
import org.junit.Assume;

public class EvictionListeningReadWriteLockedPinningIT extends AbstractPinningIT {

  @SuppressWarnings("unchecked")
  @Override
  protected PinnableCache<Integer, Integer> createPinnedIntegerCache(PageSource source) {
    Assume.assumeThat(getPointerSize(), Is.is(PointerSize.INT));
    StorageEngine<Integer, Integer> storageEngine = new SplitStorageEngine(new IntegerStorageEngine(), new IntegerStorageEngine());
    return new EvictionListeningReadWriteLockedOffHeapClockCache<Integer, Integer>(new NullEvictionListener(), source, storageEngine);
  }

  @SuppressWarnings("unchecked")
  @Override
  protected PinnableCache<Integer, byte[]> createPinnedByteArrayCache(PageSource source) {
    StorageEngine<Integer, byte[]> storageEngine = new OffHeapBufferStorageEngine<Integer, byte[]>(getPointerSize(), source, KILOBYTES.toBytes(1), new SerializablePortability(), ByteArrayPortability.INSTANCE);
    return new EvictionListeningReadWriteLockedOffHeapClockCache<Integer, byte[]>(new NullEvictionListener(), source, storageEngine);
  }

  @Override
  protected PinnableCache<Integer, byte[]> createSharingPinnedByteArrayCache(PageSource source) {
    throw new AssumptionViolatedException("Cannot create sharing eviction listening cache");
  }
  
  @SuppressWarnings("rawtypes")
  static class NullEvictionListener implements EvictionListener {

    @Override
    public void evicting(Callable evictee) {
      //ignore
    }
  }
}