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/*******************************************************************************
* Copyright 2016-2017 ZTE, Inc. and others.
*
* 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.onap.msb.apiroute.wrapper.consulextend.expose;
import java.math.BigInteger;
import java.util.concurrent.atomic.AtomicReference;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.orbitz.consul.model.ConsulResponse;
public class ConsulIndexFilter<T> implements WatchTask.Filter<T> {
private final static Logger LOGGER = LoggerFactory.getLogger(ConsulIndexFilter.class);
private final AtomicReference<BigInteger> latestIndex = new AtomicReference<BigInteger>(null);
@Override
public boolean filter(final ConsulResponse<T> object) {
// TODO Auto-generated method stub
return isChanged(object);
}
private boolean isChanged(final ConsulResponse<T> consulResponse) {
if (consulResponse != null && consulResponse.getIndex() != null
&& !consulResponse.getIndex().equals(latestIndex.get())) {
if (LOGGER.isDebugEnabled()) {
// 第一次不打印
if (latestIndex.get() != null) {
LOGGER.debug("consul index compare:new-" + consulResponse.getIndex() + " old-"
+ latestIndex.get());
}
}
this.latestIndex.set(consulResponse.getIndex());
return true;
}
return false;
}
}
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