java-MongoDb相当于Spring Batch中的作家?
作者:互联网
我正在追踪Spring doc for creating batch service.它使用JdbcBatchItemWriter实现ItemWriter,所以请您帮我用MongoItemWriter编写与以下代码等效的MongoDb吗?
我使用MongoDb找到了two tutorials,但他们使用XML文件定义了&似乎已经过时了.
@Configuration
@EnableBatchProcessing
public class BatchConfiguration {
// tag::readerwriterprocessor[]
@Bean
public ItemWriter<Person> writer(DataSource dataSource) {
JdbcBatchItemWriter<Person> writer = new JdbcBatchItemWriter<Person>();
writer.setItemSqlParameterSourceProvider(new BeanPropertyItemSqlParameterSourceProvider<Person>());
writer.setSql("INSERT INTO people (first_name, last_name) VALUES (:firstName, :lastName)");
writer.setDataSource(dataSource);
return writer;
}
// end::readerwriterprocessor[]
@Bean
public JdbcTemplate jdbcTemplate(DataSource dataSource) {
return new JdbcTemplate(dataSource);
}
}
解决方法:
package hello;
import com.mongodb.DBAddress;
import com.mongodb.MongoClient;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.batch.core.Job;
import org.springframework.batch.core.JobExecutionListener;
import org.springframework.batch.core.Step;
import org.springframework.batch.core.configuration.annotation.EnableBatchProcessing;
import org.springframework.batch.core.configuration.annotation.JobBuilderFactory;
import org.springframework.batch.core.configuration.annotation.StepBuilderFactory;
import org.springframework.batch.core.launch.support.RunIdIncrementer;
import org.springframework.batch.item.ItemProcessor;
import org.springframework.batch.item.ItemReader;
import org.springframework.batch.item.ItemWriter;
import org.springframework.batch.item.data.MongoItemWriter;
import org.springframework.batch.item.file.FlatFileItemReader;
import org.springframework.batch.item.file.mapping.BeanWrapperFieldSetMapper;
import org.springframework.batch.item.file.mapping.DefaultLineMapper;
import org.springframework.batch.item.file.transform.DelimitedLineTokenizer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.ClassPathResource;
import org.springframework.data.mongodb.MongoDbFactory;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.SimpleMongoDbFactory;
@Configuration
@EnableBatchProcessing
public class BatchConfiguration {
// tag::readerwriterprocessor[]
@Bean
public ItemReader<Person> reader() {
FlatFileItemReader<Person> reader = new FlatFileItemReader<Person>();
reader.setResource(new ClassPathResource("sample-data.csv"));
reader.setLineMapper(new DefaultLineMapper<Person>() {{
setLineTokenizer(new DelimitedLineTokenizer() {{
setNames(new String[] { "firstName", "lastName" });
}});
setFieldSetMapper(new BeanWrapperFieldSetMapper<Person>() {{
setTargetType(Person.class);
}});
}});
return reader;
}
@Bean
public ItemProcessor<Person, Person> processor() {
return new PersonItemProcessor();
}
@Bean
public ItemWriter<Record> writer() {
MongoItemWriter<Record> writer = new MongoItemWriter<Record>();
try {
writer.setTemplate(mongoTemplate());
} catch (Exception e) {
log.error(e.toString());
}
writer.setCollection("people");
return writer;
}
// end::readerwriterprocessor[]
// tag::jobstep[]
@Bean
public Job importUserJob(JobBuilderFactory jobs, Step s1, JobExecutionListener listener) {
return jobs.get("importUserJob")
.incrementer(new RunIdIncrementer())
.listener(listener)
.flow(s1)
.end()
.build();
}
@Bean
public Step step1(StepBuilderFactory stepBuilderFactory, ItemReader<Person> reader,
ItemWriter<Person> writer, ItemProcessor<Person, Person> processor) {
return stepBuilderFactory.get("step1")
.<Person, Person> chunk(10)
.reader(reader)
.processor(processor)
.writer(writer)
.build();
}
// end::jobstep[]
@Bean
public MongoDbFactory mongoDbFactory() throws Exception {
return new SimpleMongoDbFactory(new MongoClient(), "db-name");
}
@Bean
public MongoTemplate mongoTemplate() throws Exception {
MongoTemplate mongoTemplate = new MongoTemplate(mongoDbFactory());
return mongoTemplate;
}
}
标签:mongodb,spring-batch,spring-data-mongodb,spring,java 来源: https://codeday.me/bug/20191027/1947233.html