CVTPersonaCache.java

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/*
 * Autopsy Forensic Browser
 *
 * Copyright 2020 Basis Technology Corp.
 * Contact: carrier <at> sleuthkit <dot> org
 *
 * 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
 *
 *     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.sleuthkit.autopsy.communications;
 
import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.logging.Level;
import org.sleuthkit.autopsy.centralrepository.datamodel.CentralRepoException;
import org.sleuthkit.autopsy.centralrepository.datamodel.CentralRepository;
import org.sleuthkit.autopsy.centralrepository.datamodel.PersonaAccount;
import org.sleuthkit.autopsy.coreutils.Logger;
import org.sleuthkit.datamodel.Account;

final public class CVTPersonaCache {
 
    private static final Logger logger = Logger.getLogger(CVTPersonaCache.class.getName());
    private final LoadingCache<Account, List<PersonaAccount>> accountMap;
 
    private static CVTPersonaCache instance;

    private CVTPersonaCache() {
        accountMap = CacheBuilder.newBuilder().expireAfterAccess(5, TimeUnit.MINUTES).build(
                new CacheLoader<Account, List<PersonaAccount>>() {
            @Override
            public List<PersonaAccount> load(Account key) {
                List<PersonaAccount> accountList = new ArrayList<>();
                try {
                    if (CentralRepository.isEnabled()) {
                        Collection<PersonaAccount> accounts = PersonaAccount.getPersonaAccountsForAccount(key);
                        accountList.addAll(accounts);
                    }
                } catch (CentralRepoException ex) {
                    logger.log(Level.WARNING, String.format("Unable to load Persona information for account: %s", key), ex);
                }
                return accountList;
            }
        }
        );
    }

    private static synchronized CVTPersonaCache getInstance() {
        if (instance == null) {
            instance = new CVTPersonaCache();
        }
 
        return instance;
    }

    static public synchronized List<PersonaAccount> getPersonaAccounts(Account account) throws ExecutionException {
        return getInstance().accountMap.get(account);
    }
}