DefaultPersistenceManager.java

/**
 * Licensed to the Austrian Association for Software Tool Integration (AASTI)
 * under one or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information regarding copyright
 * ownership. The AASTI licenses this file to you 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.openengsb.core.persistence.internal;

import java.io.File;
import java.util.HashMap;
import java.util.Map;

import org.openengsb.core.api.persistence.PersistenceManager;
import org.openengsb.core.api.persistence.PersistenceService;
import org.osgi.framework.Bundle;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class DefaultPersistenceManager implements PersistenceManager {

    private static final Logger LOGGER = LoggerFactory.getLogger(DefaultPersistenceManager.class);

    private String persistenceRootDir;

    private final Map<String, PersistenceService> persistenceServices = new HashMap<String, PersistenceService>();

    public DefaultPersistenceManager() {
    }

    @Override
    public synchronized PersistenceService getPersistenceForBundle(Bundle bundle) {
        checkRootDirCreated();
        String dbFile = new File(getAbsoluteRootDir(), getFileName(bundle)).getPath();
        if (persistenceServices.containsKey(dbFile)) {
            return persistenceServices.get(dbFile);
        }
        new File(dbFile).mkdirs();
        PersistenceService bundleService =
            new DefaultPersistenceService(new File(dbFile), new DefaultObjectPersistenceBackend(bundle),
                new DefaultPersistenceIndex(new File(dbFile), new DefaultObjectPersistenceBackend(bundle)));
        persistenceServices.put(dbFile, bundleService);
        return bundleService;
    }

    private void checkRootDirCreated() {
        File rootDir = getAbsoluteRootDir();
        if (rootDir.exists()) {
            return;
        }
        rootDir.mkdirs();
    }

    private File getAbsoluteRootDir() {
        String karafData = System.getProperty("karaf.data");
        LOGGER.info("karafData: {}", karafData);
        return new File(karafData, persistenceRootDir);
    }

    private String getFileName(Bundle bundle) {
        final String name = bundle.getSymbolicName() + ".data";
        LOGGER.info("generated persitence-filename: {}", name);
        return name;
    }

    public void setPersistenceRootDir(String persistenceRootDir) {
        this.persistenceRootDir = persistenceRootDir;
    }

}