我通过链接-https: //github.com/spring-projects/spring-batch/blob/master/spring-batch-infrastructure/src/test/java/org/springframework/batch/item/support/ClassifierCompositeItemProcessorTests。 java,但并没有从中脱颖而出。
我正在尝试将ETL Informatica映射逻辑替换为Batch。我期待以分离出Status=I
并Status=U
成单独的(个人)处理器,然后进一步进行查找和按摩的数据,然后直接写入这些记录到表中为状态= I和用于状态= U,则执行另一个复杂的逻辑(如查找,按摩以及匹配和合并逻辑),然后将这些记录再次向上插入同一张表中。
我试图做POC,我想在其中分离记录中的记录
CustomerClassifier.java
public class CustomerClassifier implements Classifier<Customer, ItemProcessor<Customer, Customer>> {
private ItemProcessor<Customer, Customer> insertCustomerProcessor;
private ItemProcessor<Customer, Customer> updateCustomerProcessor;
public CustomerClassifier(ItemProcessor<Customer, Customer> evenCustomerProcessor, ItemProcessor<Customer, Customer> oddCustomerProcessor) {
this.insertCustomerProcessor= insertCustomerProcessor;
this.updateCustomerProcessor= updateCustomerProcessor;
}
@Override
public ItemProcessor<Customer, Customer> classify(Customer customer) {
return customer.getStatus().equals("I") ? insertCustomerProcessor : updateCustomerProcessor;
}
}
OddCustomerProcessor.java
public class OddCustomerProcessor implements ItemProcessor<Customer, Customer> {
@Override
public Customer process(Customer item) throws Exception {
Customer customer = new Customer();
// Perform some msaaging and lookups here
customer.setId(item.getId());
customer.setFirstName(item.getFirstName());
customer.setLastName(item.getLastName());
customer.setBirthdate(item.getBirthdate());
customer.setStatus(item.getStatus());
return customer;
}
}
EvenCustomerProcessor.java
public class EvenCustomerProcessor implements ItemProcessor<Customer, Customer> {
@Override
public Customer process(Customer item) throws Exception {
Customer customer = new Customer();
// Perform some msaaging and lookups here
customer.setId(item.getId());
customer.setFirstName(item.getFirstName());
customer.setLastName(item.getLastName());
customer.setBirthdate(item.getBirthdate());
customer.setStatus(item.getStatus());
return customer;
}
}
CustomLineAggregator.java
public class CustomLineAggregator implements LineAggregator<Customer> {
private ObjectMapper objectMapper = new ObjectMapper();
@Override
public String aggregate(Customer item) {
try {
return objectMapper.writeValueAsString(item);
} catch (Exception e) {
throw new RuntimeException("Unable to serialize Customer", e);
}
}
}
客户.java
@Data
@AllArgsConstructor
@Builder
@NoArgsConstructor
public class Customer {
private Long id;
private String firstName;
private String lastName;
private String birthdate;
private String status;
}
错误-
ClassifierCompositeItemProcessor <Customer,Customer>类型的方法setClassifier(Classifier <?super Customer,ItemProcessor <?,?Extended Customer >>)不适用于参数(CustomerClassifier)
组态
@Configuration
public class JobConfiguration {
@Autowired
private JobBuilderFactory jobBuilderFactory;
@Autowired
private StepBuilderFactory stepBuilderFactory;
@Autowired
private DataSource dataSource;
@Bean
public JdbcPagingItemReader<Customer> customerPagingItemReader(){
// reading database records using JDBC in a paging fashion
JdbcPagingItemReader<Customer> reader = new JdbcPagingItemReader<>();
reader.setDataSource(this.dataSource);
reader.setFetchSize(1000);
reader.setRowMapper(new CustomerRowMapper());
// Sort Keys
Map<String, Order> sortKeys = new HashMap<>();
sortKeys.put("id", Order.ASCENDING);
// MySQL implementation of a PagingQueryProvider using database specific features.
MySqlPagingQueryProvider queryProvider = new MySqlPagingQueryProvider();
queryProvider.setSelectClause("id, firstName, lastName, birthdate");
queryProvider.setFromClause("from customer");
queryProvider.setSortKeys(sortKeys);
reader.setQueryProvider(queryProvider);
return reader;
}
@Bean
public EvenCustomerProcessor evenCustomerProcessor() {
return new EvenCustomerProcessor();
}
@Bean
public OddCustomerProcessor oddCustomerProcessor() {
return new OddCustomerProcessor();
}
@Bean
public JdbcBatchItemWriter<Customer> customerItemWriter(){
JdbcBatchItemWriter<Customer> batchItemWriter = new JdbcBatchItemWriter<>();
batchItemWriter.setDataSource(dataSource);
batchItemWriter.setSql(""); // Query Goes here
return batchItemWriter;
}
@Bean
public ClassifierCompositeItemProcessor<Customer, Customer> classifierCustomerCompositeItemProcessor() throws Exception{
ClassifierCompositeItemProcessor<Customer, Customer> itemProcessor = new ClassifierCompositeItemProcessor<>();
itemProcessor.setClassifier(new CustomerClassifier(evenCustomerProcessor(), oddCustomerProcessor()));
}
@Bean
public Step step1() throws Exception {
return stepBuilderFactory.get("step1")
.<Customer, Customer> chunk(10)
.reader(customerPagingItemReader())
.processor(classifierCustomerCompositeItemProcessor())
.writer(customerItemWriter())
.build();
}
@Bean
public Job job() throws Exception {
return jobBuilderFactory.get("job")
.start(step1())
.build();
}
}
您可以删除CustomerClassifier
和定义复合物料处理器,如下所示:
@Bean
public ClassifierCompositeItemProcessor<Customer, Customer> classifierCustomerCompositeItemProcessor(
EvenCustomerProcessor evenCustomerProcessor,
OddCustomerProcessor oddCustomerProcessor
) {
ClassifierCompositeItemProcessor<Customer, Customer> itemProcessor = new ClassifierCompositeItemProcessor<>();
itemProcessor.setClassifier(new Classifier<Customer, ItemProcessor<?, ? extends Customer>>() {
@Override
public ItemProcessor<?, ? extends Customer> classify(Customer customer) {
return customer.getStatus().equals("I") ? evenCustomerProcessor : oddCustomerProcessor;
}
});
return itemProcessor;
}
然后,如下更新步骤定义:
@Bean
public Step step1() throws Exception {
return stepBuilderFactory.get("step1")
.<Customer, Customer> chunk(10)
.reader(customerPagingItemReader())
.processor(classifierCustomerCompositeItemProcessor(evenCustomerProcessor(), oddCustomerProcessor()))
.writer(customerItemWriter())
.build();
}
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