org.pentaho.metastore.stores.xml.AutomaticXmlMetaStoreCache.java Source code

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Here is the source code for org.pentaho.metastore.stores.xml.AutomaticXmlMetaStoreCache.java

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/*!
 * This program is free software; you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
 * Foundation.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this
 * program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
 * or from the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 *
 * Copyright (c) 2002-2015 Pentaho Corporation..  All rights reserved.
 */
package org.pentaho.metastore.stores.xml;

import com.google.common.cache.CacheBuilder;

import java.util.Map;

/**
 * This implementation of XmlMetaStoreCache stores the cache using soft references. But client is still able to clear it
 * manually.
 */
public class AutomaticXmlMetaStoreCache extends BaseXmlMetaStoreCache implements XmlMetaStoreCache {

    @Override
    protected <K, V> Map<K, V> createStorage() {
        return CacheBuilder.newBuilder().softValues().<K, V>build().asMap();
    }

    @Override
    protected ElementType createElementType(String elementId) {
        return new ElementType(elementId, this.<String, String>createStorage());
    }

    protected static class ElementType extends BaseXmlMetaStoreCache.ElementType {

        private final Map<String, String> elementNameToIdMap;

        public ElementType(String id, Map<String, String> elementNameToIdMap) {
            super(id);
            this.elementNameToIdMap = elementNameToIdMap;
        }

        @Override
        protected Map<String, String> getElementNameToIdMap() {
            return elementNameToIdMap;
        }

    }

}