adminmanager.java

Java的面向对象数据库系统的源代码

// You can redistribute this software and/or modify it under the terms of
// the Ozone Library License version 1 published by ozone-db.org.
//
// The original code and portions created by SMB are
// Copyright (C) 1997-@year@ by SMB GmbH. All rights reserved.
//
// $Id: AdminManager.java,v 1.6 2002/12/29 11:15:56 per_nyfelt Exp $

package org.ozoneDB.core.admin;

import org.ozoneDB.OzoneInterface;
import org.ozoneDB.core.*;
import org.ozoneDB.util.LogWriter;


/**
 * This class does nothing than handling the initialization of the admin
 * system.
 *
 * @version $Revision: 1.6 $ $Date: 2002/12/29 11:15:56 $
 * @author <a href="http://www.smb-tec.com">SMB</a>
 * @see Admin
 */
public final class AdminManager extends ServerComponent {

    public AdminManager( Env _env) {
        super( _env );
    }


    public void startup() throws Exception {
        env.logWriter.newEntry( this, "startup...", LogWriter.INFO );

        User user = env.userManager.userForID( 0 );
        // happens if db was not initialized by proper version of install tool
        if (user == null) {
            env.userManager.newUser( "root", 0 );
            user = env.userManager.userForID( 0 );
            if (user == null) {
                throw new UserManagerException( "Unable to create root user account." );
            }
        }
        Transaction ta = env.transactionManager.newTransaction( user );

        ObjectContainer adminContainer = env.storeManager.containerForID( ta, new ObjectID( AdminImpl.OBJECT_ID ));

        try {
            if (adminContainer == null) {
                env.logWriter.newEntry( this, "No admin object found. Initializing...", LogWriter.INFO );

                ObjectContainer container = ta.createObject( AdminImpl.class.getName(), OzoneInterface.GroupRead | OzoneInterface.GroupLock, AdminImpl.OBJECT_NAME, null, null, new ObjectID( AdminImpl.OBJECT_ID ) );

                try {
                    ta.prepareCommit();
                    ta.commit();
                    env.logWriter.newEntry( this, "Admin object created.", LogWriter.INFO );
                } finally {
                    container.unpin();
                }
            }
        } finally {
            if (adminContainer!=null) {
                adminContainer.unpin();
            }
        }
        env.transactionManager.deleteTransaction();
    }


    public void shutdown() throws Exception {
        env.logWriter.newEntry( this, "shutdown...", LogWriter.INFO );
    }


    public void save() throws Exception {
    }

}