ms.dew.idempotent.strategy.ItemProcessor Maven / Gradle / Ivy
/*
* Copyright 2019. the original author or authors.
*
* 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 ms.dew.idempotent.strategy;
import ms.dew.Dew;
/**
* Item processor.
*
* @author gudaoxuri
*/
public class ItemProcessor implements IdempotentProcessor {
private static final String CACHE_KEY = "dew:idempotent:item:";
@Override
public StatusEnum process(String optType, String optId, StatusEnum initStatus, long expireMs) {
if (Dew.cluster.cache.setnx(CACHE_KEY + optType + ":" + optId, initStatus.toString(), expireMs / 1000)) {
// 设置成功，表示之前不存在
return StatusEnum.NOT_EXIST;
} else {
// 设置不成功，表示之前存在，返回存在的值
String status = Dew.cluster.cache.get(CACHE_KEY + optType + ":" + optId);
if (status == null || status.isEmpty()) {
// 设置成功，表示之前不存在
return StatusEnum.NOT_EXIST;
} else {
return StatusEnum.valueOf(status);
}
}
}
@Override
public boolean confirm(String optType, String optId) {
long ttl = Dew.cluster.cache.ttl(CACHE_KEY + optType + ":" + optId);
if (ttl > 0) {
Dew.cluster.cache.setex(CACHE_KEY + optType + ":" + optId, StatusEnum.CONFIRMED.toString(), ttl);
}
return true;
}
@Override
public boolean cancel(String optType, String optId) {
Dew.cluster.cache.del(CACHE_KEY + optType + ":" + optId);
return true;
}
}