/*
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/
package com.facebook.cache.common;
/**
* Implementation of {@link CacheEventListener} that doesn't do anything.
*/
public class NoOpCacheEventListener implements CacheEventListener {
private static NoOpCacheEventListener sInstance = null;
private NoOpCacheEventListener() {
}
public static synchronized NoOpCacheEventListener getInstance() {
if (sInstance == null) {
sInstance = new NoOpCacheEventListener();
}
return sInstance;
}
@Override
public void onHit() {
}
@Override
public void onMiss() {
}
@Override
public void onWriteAttempt() {
}
@Override
public void onReadException() {
}
@Override
public void onWriteException() {
}
@Override
public void onEviction(EvictionReason evictionReason, int itemCount, long itemSize) {
}
}