com.tangosol.net.cache.WrapperNamedCache Maven / Gradle / Ivy
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/*
* Copyright (c) 2000, 2020, Oracle and/or its affiliates.
*
* Licensed under the Universal Permissive License v 1.0 as shown at
* http://oss.oracle.com/licenses/upl.
*/
package com.tangosol.net.cache;
import com.tangosol.net.CacheService;
import com.tangosol.net.NamedCache;
import com.tangosol.util.Filter;
import com.tangosol.util.InvocableMap;
import com.tangosol.util.InvocableMapHelper;
import com.tangosol.util.MapEvent;
import com.tangosol.util.QueryMap;
import com.tangosol.util.ValueExtractor;
import com.tangosol.util.WrapperConcurrentMap;
import java.util.Collection;
import java.util.Comparator;
import java.util.ConcurrentModificationException;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
/**
* A simple implementation of NamedCache interface built as a
* wrapper around any Map implementation.
*
* @param the type of the cache entry keys
* @param the type of the cache entry values
*
* @author cp 2003.05.19
*/
public class WrapperNamedCache
extends WrapperConcurrentMap
implements NamedCache
{
// ----- constructors ---------------------------------------------------
/**
* Construct a NamedCache wrapper for an empty HashMap.
*
* @param sName the cache name
*/
public WrapperNamedCache(String sName)
{
this(new HashMap<>(), sName);
}
/**
* Construct a NamedCache wrapper based on the specified map.
*
* Note: it is assumed that while the WrapperNamedCache exists,
* there is no direct manipulation with the content of the wrapped map.
*
* @param map the Map that will be wrapped by this WrapperNamedCache
* @param sName the cache name
*/
public WrapperNamedCache(Map map, String sName)
{
this(map, sName, null);
}
/**
* Construct a NamedCache wrapper based on the specified map.
*
* Note: it is assumed that while the WrapperNamedCache exists,
* there is no direct manipulation with the content of the wrapped map.
*
* @param map the Map that will be wrapped by this WrapperNamedCache
* @param sName the cache name (could be null if the map is a NamedCache)
* @param service the cache service this NamedCache is a part of
* (ignored if the map is a NamedCache)
*/
public WrapperNamedCache(Map map, String sName, CacheService service)
{
super(map, false, -1L);
m_sName = map instanceof NamedCache && sName == null ?
((NamedCache) map).getCacheName() : sName;
m_service = map instanceof NamedCache ?
((NamedCache) map).getCacheService() : service;
}
// ----- NamedCache interface -------------------------------------------
/**
* {@inheritDoc}
*/
public String getCacheName()
{
return m_sName;
}
/**
* {@inheritDoc}
*/
public CacheService getCacheService()
{
CacheService service = m_service;
if (service == null)
{
Map map = getMap();
if (map instanceof NamedCache)
{
service = ((NamedCache) map).getCacheService();
}
}
return service;
}
/**
* {@inheritDoc}
*/
public boolean isActive()
{
Map map = getMap();
return !(map instanceof NamedCache) || ((NamedCache) map).isActive();
}
/**
* {@inheritDoc}
*/
public void release()
{
Map map = getMap();
if (map instanceof NamedCache)
{
((NamedCache) map).release();
}
else
{
// no-op
}
}
/**
* {@inheritDoc}
*/
public void destroy()
{
Map map = getMap();
if (map instanceof NamedCache)
{
((NamedCache) map).destroy();
}
else
{
// no-op
}
}
/**
* {@inheritDoc}
*/
public void truncate()
{
Map map = getMap();
if (map instanceof NamedCache)
{
((NamedCache) map).truncate();
}
else
{
clear();
}
}
/**
* {@inheritDoc}
*/
public boolean isDestroyed()
{
Map map = getMap();
return map instanceof NamedCache && ((NamedCache) map).isDestroyed();
}
/**
* {@inheritDoc}
*/
public boolean isReleased()
{
Map map = getMap();
return map instanceof NamedCache && ((NamedCache) map).isReleased();
}
// ----- CacheMap interface ----------------------------------------
/**
* {@inheritDoc}
*/
public Map getAll(Collection colKeys)
{
Map map = getMap();
if (map instanceof CacheMap)
{
long ldtStart = getSafeTimeMillis();
Map mapResult = ((CacheMap) map).getAll(colKeys);
if (isCollectStats())
{
int cHits = mapResult.size();
if (cHits > 0)
{
m_stats.registerHits(cHits, ldtStart);
}
int cMisses = colKeys.size() - cHits;
if (cMisses > 0)
{
m_stats.registerMisses(cMisses, ldtStart);
}
}
return mapResult;
}
else
{
Map mapResult = new HashMap<>(colKeys.size());
for (K key : colKeys)
{
V value = get(key);
if (value != null || containsKey(key))
{
mapResult.put(key, value);
}
}
return mapResult;
}
}
/**
* {@inheritDoc}
*/
public V put(K oKey, V oValue, long cMillis)
{
V oOrig;
Map mapInner = getMap();
if (mapInner instanceof CacheMap)
{
// for an understanding of this locking-related code, see
// WrapperConcurrentMap#put
boolean fForceLock = isLockingEnforced();
if (!fForceLock || lock(oKey, getWaitMillis()))
{
try
{
boolean fStats = isCollectStats();
long ldtStart = fStats ? getSafeTimeMillis() : 0L;
// for an understanding of this event-related code, see
// WrapperObservableMap#put
if (isEventFabricator())
{
int nEvent = mapInner.containsKey(oKey)
? MapEvent.ENTRY_UPDATED
: MapEvent.ENTRY_INSERTED;
oOrig = ((CacheMap) mapInner).put(oKey, oValue, cMillis);
dispatchEvent(new CacheEvent<>(this, nEvent, oKey,
oOrig, oValue, false));
}
else
{
oOrig = ((CacheMap) mapInner).put(oKey, oValue, cMillis);
}
if (fStats)
{
// update statistics
m_stats.registerPut(ldtStart);
}
}
finally
{
if (fForceLock)
{
unlock(oKey);
}
}
}
else
{
throw new ConcurrentModificationException(
"(thread=" + Thread.currentThread() + ") "
+ getLockDescription(oKey));
}
}
else if (cMillis <= 0)
{
oOrig = super.put(oKey, oValue);
}
else
{
throw new UnsupportedOperationException();
}
return oOrig;
}
// ----- QueryMap interface ---------------------------------------------
/**
* {@inheritDoc}
*/
public Set keySet(Filter filter)
{
Map map = getMap();
return map instanceof QueryMap ?
((QueryMap) map).keySet(filter) :
InvocableMapHelper.query(map, filter, false, false, null);
}
/**
* {@inheritDoc}
*/
public Set> entrySet(Filter filter)
{
Map map = getMap();
return map instanceof QueryMap ?
((QueryMap) map).entrySet(filter) :
InvocableMapHelper.query(map, filter, true, false, null);
}
/**
* {@inheritDoc}
*/
public Set> entrySet(Filter filter, Comparator comparator)
{
Map map = getMap();
return map instanceof QueryMap ?
((QueryMap) map).entrySet(filter, comparator) :
InvocableMapHelper.query(map, filter, true, true, comparator);
}
/**
* {@inheritDoc}
*/
public void addIndex(ValueExtractor extractor, boolean fOrdered, Comparator comparator)
{
Map map = getMap();
if (map instanceof QueryMap)
{
((QueryMap) map).addIndex(extractor, fOrdered, comparator);
}
}
/**
* {@inheritDoc}
*/
public void removeIndex(ValueExtractor extractor)
{
Map map = getMap();
if (map instanceof QueryMap)
{
((QueryMap) map).removeIndex(extractor);
}
}
// ----- InvocableMap interface -----------------------------------------
/**
* {@inheritDoc}
*/
public R invoke(K key, EntryProcessor agent)
{
Map map = getMap();
if (map instanceof InvocableMap)
{
return ((InvocableMap) map).invoke(key, agent);
}
else
{
return InvocableMapHelper.invokeLocked(this,
InvocableMapHelper.makeEntry(this, key), agent);
}
}
/**
* {@inheritDoc}
*/
public Map invokeAll(Collection collKeys, EntryProcessor agent)
{
Map map = getMap();
if (map instanceof InvocableMap)
{
return ((InvocableMap) map).invokeAll(collKeys, agent);
}
else
{
return InvocableMapHelper.invokeAllLocked(this,
InvocableMapHelper.makeEntrySet(this, collKeys, false), agent);
}
}
/**
* {@inheritDoc}
*/
public Map invokeAll(Filter filter, EntryProcessor agent)
{
Map map = getMap();
if (map instanceof InvocableMap)
{
return ((InvocableMap) map).invokeAll(filter, agent);
}
else
{
return invokeAll(keySet(filter), agent);
}
}
/**
* {@inheritDoc}
*/
public R aggregate(Collection collKeys, EntryAggregator agent)
{
Map map = getMap();
if (map instanceof InvocableMap)
{
return ((InvocableMap) map).aggregate(collKeys, agent);
}
else
{
return agent.aggregate(InvocableMapHelper.makeEntrySet(this, collKeys, true));
}
}
/**
* {@inheritDoc}
*/
public R aggregate(Filter filter, EntryAggregator agent)
{
Map map = getMap();
if (map instanceof InvocableMap)
{
return ((InvocableMap) map).aggregate(filter, agent);
}
else
{
return aggregate(keySet(filter), agent);
}
}
// ----- data fields ----------------------------------------------------
/**
* The name of the cache.
*/
protected String m_sName;
/**
* The CacheService this NamedCache is a part of.
*/
protected CacheService m_service;
}