spring-batch JobListenerMetaData 源码
spring-batch JobListenerMetaData 代码
文件路径：/spring-batch-core/src/main/java/org/springframework/batch/core/listener/JobListenerMetaData.java
/*
* Copyright 2002-2018 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.listener;
import java.lang.annotation.Annotation;
import java.util.HashMap;
import java.util.Map;
import org.springframework.batch.core.JobExecution;
import org.springframework.batch.core.JobExecutionListener;
import org.springframework.batch.core.annotation.AfterJob;
import org.springframework.batch.core.annotation.BeforeJob;
import org.springframework.lang.Nullable;
/**
* Enumeration for {@link JobExecutionListener} meta data, which ties together the names
* of methods, their interfaces, annotation, and expected arguments.
*
* @author Lucas Ward
* @author Mahmoud Ben Hassine
* @since 2.0
* @see JobListenerFactoryBean
*/
public enum JobListenerMetaData implements ListenerMetaData {
BEFORE_JOB("beforeJob", "before-job-method", BeforeJob.class),
AFTER_JOB("afterJob", "after-job-method", AfterJob.class);
private final String methodName;
private final String propertyName;
private final Class<? extends Annotation> annotation;
private static final Map<String, JobListenerMetaData> propertyMap;
JobListenerMetaData(String methodName, String propertyName, Class<? extends Annotation> annotation) {
this.methodName = methodName;
this.propertyName = propertyName;
this.annotation = annotation;
}
static {
propertyMap = new HashMap<>();
for (JobListenerMetaData metaData : values()) {
propertyMap.put(metaData.getPropertyName(), metaData);
}
}
@Override
public String getMethodName() {
return methodName;
}
@Override
public Class<? extends Annotation> getAnnotation() {
return annotation;
}
@Override
public Class<?> getListenerInterface() {
return JobExecutionListener.class;
}
@Override
public String getPropertyName() {
return propertyName;
}
@Override
public Class<?>[] getParamTypes() {
return new Class<?>[] { JobExecution.class };
}
/**
* Return the relevant meta data for the provided property name.
* @param propertyName name of the property to retrieve.
* @return meta data with supplied property name, {@code null} if none exists.
*/
@Nullable
public static JobListenerMetaData fromPropertyName(String propertyName) {
return propertyMap.get(propertyName);
}
}
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