/******************************************************************************* | |
* Copyright (c) 1998, 2013 Oracle and/or its affiliates. All rights reserved. | |
* This program and the accompanying materials are made available under the | |
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0 | |
* which accompanies this distribution. | |
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html | |
* and the Eclipse Distribution License is available at | |
* http://www.eclipse.org/org/documents/edl-v10.php. | |
* | |
* Contributors: | |
* Oracle - initial API and implementation from Oracle TopLink | |
******************************************************************************/ | |
package org.eclipse.persistence.descriptors.invalidation; | |
import org.eclipse.persistence.internal.identitymaps.CacheKey; | |
import org.eclipse.persistence.descriptors.invalidation.CacheInvalidationPolicy; | |
/** | |
* PUBLIC: | |
* A cache invalidation policy in which no objects will expire. The only way for objects | |
* to become invalid in the cache is for them to be explicitly set to invalid through | |
* method calls on the IdentityMapAccessor. This is the default cache invalidation policy. | |
* @see CacheInvalidationPolicy | |
* @see org.eclipse.persistence.sessions.IdentityMapAccessor | |
*/ | |
public class NoExpiryCacheInvalidationPolicy extends CacheInvalidationPolicy { | |
/** | |
* INTERNAL: | |
* Since this policy implements no expiry, this will always return NO_EXPIRY | |
*/ | |
public long getExpiryTimeInMillis(CacheKey key) { | |
return NO_EXPIRY; | |
} | |
/** | |
* INTERNAL: | |
* Return the remaining life of this object | |
* Override the default implementation. | |
*/ | |
public long getRemainingValidTime(CacheKey key) { | |
return NO_EXPIRY; | |
} | |
/** | |
* INTERNAL: | |
* This will return true if the object is set to be invalid, false otherwise. | |
*/ | |
public boolean isInvalidated(CacheKey key) { | |
return key.getInvalidationState() == CacheKey.CACHE_KEY_INVALID; | |
} | |
/** | |
* INTERNAL: | |
* This will return true if the object is set to be invalid, false otherwise. | |
*/ | |
public boolean isInvalidated(CacheKey key, long currentTimeMillis) { | |
return key.getInvalidationState() == CacheKey.CACHE_KEY_INVALID; | |
} | |
} |