spring-batch CustomerUpdateProcessor 源码
spring-batch CustomerUpdateProcessor 代码
文件路径：/spring-batch-samples/src/main/java/org/springframework/batch/sample/domain/trade/CustomerUpdateProcessor.java
/*
* Copyright 2006-2019 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
*
* 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.sample.domain.trade;
import static org.springframework.batch.sample.domain.trade.CustomerOperation.*;
import org.springframework.batch.item.ItemProcessor;
import org.springframework.lang.Nullable;
/**
* @author Lucas Ward
*
*/
public class CustomerUpdateProcessor implements ItemProcessor<CustomerUpdate, CustomerUpdate> {
private CustomerDao customerDao;
private InvalidCustomerLogger invalidCustomerLogger;
@Nullable
@Override
public CustomerUpdate process(CustomerUpdate item) throws Exception {
if (item.getOperation() == DELETE) {
// delete is not supported
invalidCustomerLogger.log(item);
return null;
}
CustomerCredit customerCredit = customerDao.getCustomerByName(item.getCustomerName());
if (item.getOperation() == ADD && customerCredit == null) {
return item;
}
else if (item.getOperation() == ADD && customerCredit != null) {
// veto processing
invalidCustomerLogger.log(item);
return null;
}
if (item.getOperation() == UPDATE && customerCredit != null) {
return item;
}
else if (item.getOperation() == UPDATE && customerCredit == null) {
// veto processing
invalidCustomerLogger.log(item);
return null;
}
// if an item makes it through all these checks it can be assumed to be bad,
// logged, and skipped
invalidCustomerLogger.log(item);
return null;
}
public void setCustomerDao(CustomerDao customerDao) {
this.customerDao = customerDao;
}
public void setInvalidCustomerLogger(InvalidCustomerLogger invalidCustomerLogger) {
this.invalidCustomerLogger = invalidCustomerLogger;
}
}
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