spring-batch ExceptionClassifierSkipPolicy 源码
spring-batch ExceptionClassifierSkipPolicy 代码
文件路径：/spring-batch-core/src/main/java/org/springframework/batch/core/step/skip/ExceptionClassifierSkipPolicy.java
/*
* Copyright 2006-2021 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
*
* https://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.batch.core.step.skip;
import java.util.Map;
import org.springframework.classify.Classifier;
import org.springframework.classify.SubclassClassifier;
/**
* A {@link SkipPolicy} that depends on an exception classifier to make its decision, and
* then delegates to the classifier result.
*
* @author Dave Syer
* @author Mahmoud Ben Hassine
* @see SubclassClassifier
*/
public class ExceptionClassifierSkipPolicy implements SkipPolicy {
private SubclassClassifier<Throwable, SkipPolicy> classifier;
/**
* The classifier that will be used to choose a delegate policy.
* @param classifier the classifier to use to choose a delegate policy
*/
public void setExceptionClassifier(SubclassClassifier<Throwable, SkipPolicy> classifier) {
this.classifier = classifier;
}
/**
* Setter for policy map. This property should not be changed dynamically - set it
* once, e.g. in configuration, and then don't change it during a running application.
* Either this property or the exception classifier directly should be set, but not
* both.
* @param policyMap a map of String to {@link SkipPolicy} that will be used to create
* a {@link Classifier} to locate a policy.
*/
public void setPolicyMap(Map<Class<? extends Throwable>, SkipPolicy> policyMap) {
SubclassClassifier<Throwable, SkipPolicy> subclassClassifier = new SubclassClassifier<>(policyMap,
new NeverSkipItemSkipPolicy());
this.classifier = subclassClassifier;
}
/**
* Consult the classifier and find a delegate policy, and then use that to determine
* the outcome.
* @param t the throwable to consider
* @param skipCount the current skip count
* @return true if the exception can be skipped
* @throws SkipLimitExceededException if a limit is exceeded
*/
@Override
public boolean shouldSkip(Throwable t, long skipCount) throws SkipLimitExceededException {
return classifier.classify(t).shouldSkip(t, skipCount);
}
}
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