QMMObject.java

/*
 * DBeaver - Universal Database Manager
 * Copyright (C) 2010-2017 Serge Rider (serge@jkiss.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.jkiss.dbeaver.model.qm.meta;

import org.jkiss.dbeaver.Log;

/**
 * Abstract QM meta object
 */
public abstract class QMMObject {

    static final Log log = Log.getLog(QMMObject.class);

    private static int globalObjectId = 0;

    private final long objectId;

    private final long openTime;
    private long closeTime;

    private boolean synced;
    private boolean updated;

    public QMMObject()
    {
        this.objectId = generateObjectId();
        this.openTime = getTimeStamp();
    }

    protected void close()
    {
        this.closeTime = getTimeStamp();
        this.update();
    }

    protected void reopen()
    {
        this.closeTime = 0;
        this.update();
    }

    public long getObjectId()
    {
        return objectId;
    }

    public boolean isSynced()
    {
        return synced;
    }

    public boolean isUpdated()
    {
        return updated;
    }

    public long getOpenTime()
    {
        return openTime;
    }

    public long getCloseTime()
    {
        return closeTime;
    }

    public boolean isClosed()
    {
        return closeTime > 0;
    }

    protected synchronized void update()
    {
        this.updated = true;
    }

    protected synchronized void sync()
    {
        this.synced = true;
        this.updated = false;
    }

    private static synchronized long generateObjectId()
    {
        globalObjectId++;
        return globalObjectId;
    }

    protected static long getTimeStamp()
    {
        return System.currentTimeMillis();
    }

}