libraries/uid/src/main/java/org/apache/zest/library/uid/sequence/TransientSequencingMixin.java

/*
 * Copyright 2008 Niclas Hedhman. All rights Reserved.
 *
 * 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.apache.zest.library.uid.sequence;

public class TransientSequencingMixin
    implements Sequencing
{
    private long counter;

    @Override
    public Long newSequenceValue()
        throws SequencingException
    {
        synchronized( this )
        {
            return ++counter;
        }
    }

    @Override
    public Long currentSequenceValue()
    {
        synchronized( this )
        {
            return counter;
        }
    }
}