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A quick developing framewort for internet company
/**
* Copyright (C) 2016 - 2030 youtongluan.
*
* 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.yx.common.sequence;
import java.util.concurrent.ThreadLocalRandom;
import java.util.concurrent.atomic.AtomicInteger;
public class SnowflakeCounter implements SeqCounter {
private final int snow;
private final AtomicInteger seq;
@Override
public int incr(String name) throws Exception {
int random = seq.incrementAndGet() & 0xFFFF;
random <<= 8;
return snow | random;
}
public SnowflakeCounter(int snow) {
this.snow = snow & 0xFF;
seq = new AtomicInteger(ThreadLocalRandom.current().nextInt());
}
}
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