org.springframework.security.acls.domain.SpringCacheBasedAclCache Maven / Gradle / Ivy
/*
* Copyright 2002-2013 the original author or authors.
*
* 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
*
* https://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.springframework.security.acls.domain;
import java.io.Serializable;
import org.springframework.cache.Cache;
import org.springframework.security.acls.model.AclCache;
import org.springframework.security.acls.model.MutableAcl;
import org.springframework.security.acls.model.ObjectIdentity;
import org.springframework.security.acls.model.PermissionGrantingStrategy;
import org.springframework.security.util.FieldUtils;
import org.springframework.util.Assert;
/**
* Simple implementation of {@link org.springframework.security.acls.model.AclCache} that
* delegates to {@link Cache} implementation.
*
* Designed to handle the transient fields in
* {@link org.springframework.security.acls.domain.AclImpl}. Note that this implementation
* assumes all {@link org.springframework.security.acls.domain.AclImpl} instances share
* the same {@link org.springframework.security.acls.model.PermissionGrantingStrategy} and
* {@link org.springframework.security.acls.domain.AclAuthorizationStrategy} instances.
*
* @author Marten Deinum
* @since 3.2
*/
public class SpringCacheBasedAclCache implements AclCache {
private final Cache cache;
private PermissionGrantingStrategy permissionGrantingStrategy;
private AclAuthorizationStrategy aclAuthorizationStrategy;
public SpringCacheBasedAclCache(Cache cache, PermissionGrantingStrategy permissionGrantingStrategy,
AclAuthorizationStrategy aclAuthorizationStrategy) {
Assert.notNull(cache, "Cache required");
Assert.notNull(permissionGrantingStrategy, "PermissionGrantingStrategy required");
Assert.notNull(aclAuthorizationStrategy, "AclAuthorizationStrategy required");
this.cache = cache;
this.permissionGrantingStrategy = permissionGrantingStrategy;
this.aclAuthorizationStrategy = aclAuthorizationStrategy;
}
@Override
public void evictFromCache(Serializable pk) {
Assert.notNull(pk, "Primary key (identifier) required");
MutableAcl acl = getFromCache(pk);
if (acl != null) {
this.cache.evict(acl.getId());
this.cache.evict(acl.getObjectIdentity());
}
}
@Override
public void evictFromCache(ObjectIdentity objectIdentity) {
Assert.notNull(objectIdentity, "ObjectIdentity required");
MutableAcl acl = getFromCache(objectIdentity);
if (acl != null) {
this.cache.evict(acl.getId());
this.cache.evict(acl.getObjectIdentity());
}
}
@Override
public MutableAcl getFromCache(ObjectIdentity objectIdentity) {
Assert.notNull(objectIdentity, "ObjectIdentity required");
return getFromCache((Object) objectIdentity);
}
@Override
public MutableAcl getFromCache(Serializable pk) {
Assert.notNull(pk, "Primary key (identifier) required");
return getFromCache((Object) pk);
}
@Override
public void putInCache(MutableAcl acl) {
Assert.notNull(acl, "Acl required");
Assert.notNull(acl.getObjectIdentity(), "ObjectIdentity required");
Assert.notNull(acl.getId(), "ID required");
if ((acl.getParentAcl() != null) && (acl.getParentAcl() instanceof MutableAcl)) {
putInCache((MutableAcl) acl.getParentAcl());
}
this.cache.put(acl.getObjectIdentity(), acl);
this.cache.put(acl.getId(), acl);
}
private MutableAcl getFromCache(Object key) {
Cache.ValueWrapper element = this.cache.get(key);
if (element == null) {
return null;
}
return initializeTransientFields((MutableAcl) element.get());
}
private MutableAcl initializeTransientFields(MutableAcl value) {
if (value instanceof AclImpl) {
FieldUtils.setProtectedFieldValue("aclAuthorizationStrategy", value, this.aclAuthorizationStrategy);
FieldUtils.setProtectedFieldValue("permissionGrantingStrategy", value, this.permissionGrantingStrategy);
}
if (value.getParentAcl() != null) {
initializeTransientFields((MutableAcl) value.getParentAcl());
}
return value;
}
@Override
public void clearCache() {
this.cache.clear();
}
}