我跟随Spring doc for creating batch service。我已经调整了to store the data in MongoDb。现在我想添加另一个从MongoDb集合中读取的步骤，进程＆amp;写入另一个集合。我发现了一些使用MongoDb的弹簧批量教程，但他们使用XML文件来定义bean和amp;似乎过时了。
@Configuration
@EnableBatchProcessing
@Import(SpringMongoConfig.class)
public class BatchConfiguration {
@Autowired
private SpringMongoConfig springMongoConfig;
private static final Logger log = LoggerFactory.getLogger(BatchConfiguration.class);
private static final String csvFileName = "sample-data.csv",
recordCollectionName = "records",
processedRecordCollectionName = "processedRecords";
@Bean
public Job importUserJob(JobBuilderFactory jobs, Step s1, Step s2, JobExecutionListener listener) {
return jobs.get("importUserJob")
.incrementer(new RunIdIncrementer())
.listener(listener)
.flow(s1)
.next(s2)
.end()
.build();
}
@Bean
public Step step1(StepBuilderFactory stepBuilderFactory, ItemReader<Record> csvRecordReader,
ItemWriter<Record> mongoRecordWriter) {
return stepBuilderFactory.get("step1").
<Record, Record> chunk(10).
reader(csvRecordReader())
.writer(mongoRecordWriter())
.build();
}
@Bean
public Step step2(StepBuilderFactory stepBuilderFactory, ItemReader<Record> mongoRecordReader,
ItemWriter<processedRecord> mongoprocessedRecordWriter, ItemProcessor<Record, processedRecord> processor) {
return stepBuilderFactory.get("step2")
.<Record, processedRecord> chunk(10)
.reader(mongoRecordReader)
.processor(processor)
.writer(mongoprocessedRecordWriter)
.build();
}
// tag::readerwriter[1]
@Bean
public ItemReader<Record> csvRecordReader() {
FlatFileItemReader<Record> reader = new FlatFileItemReader<Record>();
reader.setResource(new ClassPathResource(csvFileName));
reader.setLineMapper(new DefaultLineMapper<Record>() {
{
setLineTokenizer(new DelimitedLineTokenizer() {
{
setNames(new String[] { "id", "firstName", "lastName" });
}
});
setFieldSetMapper(new BeanWrapperFieldSetMapper<Record>() {
{
setTargetType(Record.class);
}
});
}
});
return reader;
}
@Bean
public ItemWriter<Record> mongoRecordWriter() {
MongoItemWriter<Record> writer = new MongoItemWriter<Record>();
try {
writer.setTemplate(springMongoConfig.mongoTemplate());
} catch (Exception e) {
log.error(e.toString());
}
writer.setCollection(recordCollectionName);
return writer;
}
// end::readerwriter[1]
// tag::readerprocessorwriter[2]
@Bean
public ItemReader<Record> mongoRecordReader() {
MongoItemReader<Record> reader = new MongoItemReader<Record>();
try {
reader.setTemplate(springMongoConfig.mongoTemplate());
} catch (Exception e) {
log.error(e.toString());
}
reader.setCollection(recordCollectionName);
return reader;
}
@Bean
public ItemProcessor<Record, processedRecord> processor() {
return new RecordItemProcessor();
}
@Bean
public ItemWriter<processedRecord> mongoprocessedRecordWriter() {
MongoItemWriter<processedRecord> writer = new MongoItemWriter<processedRecord>();
try {
writer.setTemplate(springMongoConfig.mongoTemplate());
} catch (Exception e) {
log.error(e.toString());
}
writer.setCollection(processedRecordCollectionName);
return writer;
}
// end::readerprocessorwriter[2]
}
我收到了以下错误：
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'importUserJob' defined in class path resource [com/xyz/abc/batch/BatchConfiguration.class]: Unsatisfied dependency expressed through constructor argument with index 1 of type [org.springframework.batch.core.Step]: : Error creating bean with name 'step1' defined in class path resource [com/xyz/abc/batch/BatchConfiguration.class]: Unsatisfied dependency expressed through constructor argument with index 1 of type [org.springframework.batch.item.ItemReader]: : Error creating bean with name 'mongoRecordReader' defined in class path resource [com/xyz/abc/batch/BatchConfiguration.class]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: A type to convert the input into is required.; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongoRecordReader' defined in class path resource [com/xyz/abc/batch/BatchConfiguration.class]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: A type to convert the input into is required.; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'step1' defined in class path resource [com/xyz/abc/batch/BatchConfiguration.class]: Unsatisfied dependency expressed through constructor argument with index 1 of type [org.springframework.batch.item.ItemReader]: : Error creating bean with name 'mongoRecordReader' defined in class path resource [com/xyz/abc/batch/BatchConfiguration.class]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: A type to convert the input into is required.; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongoRecordReader' defined in class path resource [com/xyz/abc/batch/BatchConfiguration.class]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: A type to convert the input into is required.
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:749)
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:464)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1119)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1014)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:755)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:757)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:480)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:687)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:321)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:967)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:956)
at com.xyz.abc.batch.App.main(App.java:18)
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'step1' defined in class path resource [com/xyz/abc/batch/BatchConfiguration.class]: Unsatisfied dependency expressed through constructor argument with index 1 of type [org.springframework.batch.item.ItemReader]: : Error creating bean with name 'mongoRecordReader' defined in class path resource [com/xyz/abc/batch/BatchConfiguration.class]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: A type to convert the input into is required.; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongoRecordReader' defined in class path resource [com/xyz/abc/batch/BatchConfiguration.class]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: A type to convert the input into is required.
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:749)
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:464)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1119)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1014)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1120)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1044)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:942)
at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:813)
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:741)
... 17 common frames omitted
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongoRecordReader' defined in class path resource [com/xyz/abc/batch/BatchConfiguration.class]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: A type to convert the input into is required.
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1120)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1044)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:942)
at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:813)
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:741)
... 31 common frames omitted
Caused by: java.lang.IllegalStateException: A type to convert the input into is required.
at org.springframework.util.Assert.state(Assert.java:385)
at org.springframework.batch.item.data.MongoItemReader.afterPropertiesSet(MongoItemReader.java:200)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1633)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1570)
... 42 common frames omitted
Exception in thread "main" org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'importUserJob' defined in class path resource [com/xyz/abc/batch/BatchConfiguration.class]: Unsatisfied dependency expressed through constructor argument with index 1 of type [org.springframework.batch.core.Step]: : Error creating bean with name 'step1' defined in class path resource [com/xyz/abc/batch/BatchConfiguration.class]: Unsatisfied dependency expressed through constructor argument with index 1 of type [org.springframework.batch.item.ItemReader]: : Error creating bean with name 'mongoRecordReader' defined in class path resource [com/xyz/abc/batch/BatchConfiguration.class]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: A type to convert the input into is required.; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongoRecordReader' defined in class path resource [com/xyz/abc/batch/BatchConfiguration.class]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: A type to convert the input into is required.; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'step1' defined in class path resource [com/xyz/abc/batch/BatchConfiguration.class]: Unsatisfied dependency expressed through constructor argument with index 1 of type [org.springframework.batch.item.ItemReader]: : Error creating bean with name 'mongoRecordReader' defined in class path resource [com/xyz/abc/batch/BatchConfiguration.class]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: A type to convert the input into is required.; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongoRecordReader' defined in class path resource [com/xyz/abc/batch/BatchConfiguration.class]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: A type to convert the input into is required.
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:749)
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:464)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1119)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1014)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:755)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:757)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:480)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:687)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:321)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:967)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:956)
at com.xyz.abc.batch.App.main(App.java:18)
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'step1' defined in class path resource [com/xyz/abc/batch/BatchConfiguration.class]: Unsatisfied dependency expressed through constructor argument with index 1 of type [org.springframework.batch.item.ItemReader]: : Error creating bean with name 'mongoRecordReader' defined in class path resource [com/xyz/abc/batch/BatchConfiguration.class]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: A type to convert the input into is required.; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongoRecordReader' defined in class path resource [com/xyz/abc/batch/BatchConfiguration.class]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: A type to convert the input into is required.
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:749)
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:464)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1119)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1014)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1120)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1044)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:942)
at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:813)
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:741)
... 17 more
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongoRecordReader' defined in class path resource [com/xyz/abc/batch/BatchConfiguration.class]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: A type to convert the input into is required.
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1120)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1044)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:942)
at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:813)
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:741)
... 31 more
Caused by: java.lang.IllegalStateException: A type to convert the input into is required.
at org.springframework.util.Assert.state(Assert.java:385)
at org.springframework.batch.item.data.MongoItemReader.afterPropertiesSet(MongoItemReader.java:200)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1633)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1570)
... 42 more
答案 0 :(得分：3)
我认为您在setTargetType中错过了对mongoRecordReader()的来电。有关详细信息，请参阅MongoItemReader的docs。
另外，看看AfterPropertiesSet：
@Override
public void afterPropertiesSet() throws Exception {
Assert.state(template != null, "An implementation of MongoOperations is required.");
Assert.state(type != null, "A type to convert the input into is required.");
Assert.state(query != null, "A query is required.");
Assert.state(sort != null, "A sort is required.");
}
还有一些其他必填字段。