bookkeeper-server/src/main/java/org/apache/bookkeeper/meta/MetadataBookieDriver.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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.apache.bookkeeper.meta;

import org.apache.bookkeeper.conf.ServerConfiguration;
import org.apache.bookkeeper.discover.RegistrationManager;
import org.apache.bookkeeper.discover.RegistrationManager.RegistrationListener;
import org.apache.bookkeeper.meta.exceptions.MetadataException;
import org.apache.bookkeeper.stats.StatsLogger;

/**
 * Driver to manage all the metadata managers required by a bookie server.
 */
public interface MetadataBookieDriver extends AutoCloseable {

    /**
     * Initialize the metadata driver.
     *
     * @param conf configuration
     * @param listener registration listener listening on registration state changes.
     * @param statsLogger stats logger
     * @return metadata driver
     */
    MetadataBookieDriver initialize(ServerConfiguration conf,
                                    RegistrationListener listener,
                                    StatsLogger statsLogger)
        throws MetadataException;

    /**
     * Get the scheme of the metadata driver.
     *
     * @return the scheme of the metadata driver.
     */
    String getScheme();

    /**
     * Return the registration manager used for registering/unregistering bookies.
     *
     * @return the registration manager used for registering/unregistering bookies.
     */
    RegistrationManager getRegistrationManager();

    /**
     * Return the ledger manager factory used for accessing ledger metadata.
     *
     * @return the ledger manager factory used for accessing ledger metadata.
     */
    LedgerManagerFactory getLedgerManagerFactory()
        throws MetadataException;

    /**
     * Return the layout manager.
     *
     * @return the layout manager.
     */
    LayoutManager getLayoutManager();

    @Override
    void close();

}