/*
* 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.cassandra.cache;
import java.util.Set;
import org.apache.cassandra.metrics.CacheMetrics;
/**
* Wraps an ICache in requests + hits tracking.
*/
public class InstrumentingCache<K, V>
{
private volatile boolean capacitySetManually;
private final ICache<K, V> map;
private final String type;
private CacheMetrics metrics;
public InstrumentingCache(String type, ICache<K, V> map)
{
this.map = map;
this.type = type;
this.metrics = new CacheMetrics(type, map);
}
public void put(K key, V value)
{
map.put(key, value);
}
public boolean putIfAbsent(K key, V value)
{
return map.putIfAbsent(key, value);
}
public boolean replace(K key, V old, V value)
{
return map.replace(key, old, value);
}
public V get(K key)
{
V v = map.get(key);
metrics.requests.mark();
if (v != null)
metrics.hits.mark();
return v;
}
public V getInternal(K key)
{
return map.get(key);
}
public void remove(K key)
{
map.remove(key);
}
public long getCapacity()
{
return map.capacity();
}
public boolean isCapacitySetManually()
{
return capacitySetManually;
}
public void updateCapacity(long capacity)
{
map.setCapacity(capacity);
}
public void setCapacity(long capacity)
{
updateCapacity(capacity);
capacitySetManually = true;
}
public int size()
{
return map.size();
}
public long weightedSize()
{
return map.weightedSize();
}
public void clear()
{
map.clear();
metrics = new CacheMetrics(type, map);
}
public Set<K> getKeySet()
{
return map.keySet();
}
public Set<K> hotKeySet(int n)
{
return map.hotKeySet(n);
}
public boolean containsKey(K key)
{
return map.containsKey(key);
}
public boolean isPutCopying()
{
return map.isPutCopying();
}
public CacheMetrics getMetrics()
{
return metrics;
}
}