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Spring Retry provides an abstraction around retrying failed operations, with an emphasis on declarative control of the process and policy-based bahaviour that is easy to extend and customize. For instance, you can configure a plain POJO operation to retry if it fails, based on the type of exception, and with a fixed or exponential backoff.
/*
* Copyright 2012-2015 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 org.springframework.retry.stats;
import java.util.ArrayList;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import org.springframework.retry.RetryStatistics;
/**
* @author Dave Syer
*
*/
public class DefaultStatisticsRepository implements StatisticsRepository {
private ConcurrentMap map = new ConcurrentHashMap();
private RetryStatisticsFactory factory = new DefaultRetryStatisticsFactory();
public void setRetryStatisticsFactory(RetryStatisticsFactory factory) {
this.factory = factory;
}
@Override
public RetryStatistics findOne(String name) {
return map.get(name);
}
@Override
public Iterable findAll() {
return new ArrayList(map.values());
}
@Override
public void addStarted(String name) {
getStatistics(name).incrementStartedCount();
}
@Override
public void addError(String name) {
getStatistics(name).incrementErrorCount();
}
@Override
public void addRecovery(String name) {
getStatistics(name).incrementRecoveryCount();
}
@Override
public void addComplete(String name) {
getStatistics(name).incrementCompleteCount();
}
@Override
public void addAbort(String name) {
getStatistics(name).incrementAbortCount();
}
private MutableRetryStatistics getStatistics(String name) {
MutableRetryStatistics stats;
if (!map.containsKey(name)) {
map.putIfAbsent(name, factory.create(name));
}
stats = map.get(name);
return stats;
}
}