spring-batch

问题 I'm working on Spring batch and SCDF example. In this example I am reading CSV file and loading all the data to MySQL . I was able to successfully load the data into MySQL DB, but but UI doesn't show me START_TIME and END_TIME , even db doesn't holds any records. I've uploaded my code here: https://github.com/JavaNeed/spring-cloud-dataflow-example1.git spring-cloud-data-flow-server SpringCloudDataFlowServerApplication.java @EnableDataFlowServer @SpringBootApplication(exclude = {

问题 I'm working on Spring batch and SCDF example. In this example I am reading CSV file and loading all the data to MySQL . I was able to successfully load the data into MySQL DB, but but UI doesn't show me START_TIME and END_TIME , even db doesn't holds any records. I've uploaded my code here: https://github.com/JavaNeed/spring-cloud-dataflow-example1.git spring-cloud-data-flow-server SpringCloudDataFlowServerApplication.java @EnableDataFlowServer @SpringBootApplication(exclude = {

问题 I have a Person object that has a list of addresses. My Spring Batch app converts Person JSON recors into Person POJOs and writes them to a database. Ordinarily, I'd use JdbcBatchItemWriter but I see it is limited in writing to 2 seperate tables. I need to write to Person and Address table. Hibernate could write this in one step but I don't see a simialr capability in Spring Bathc. This SO question Multiple itemwriters in Spring batch suggests using a CompositeItemWriter but the issue with

问题 In Spring Batch, processors Map from one of an Input type to one of an Output type. However I have a need to generate a list of Output type ( List<O> ) from one I . The processor can return the List<O> just fine, but supposing I want to work with the elements of this list as individuals in subsequent processors. Am I expected to write them to the database first? In fact I have some enrichment from a remote service that needs to be done to each member of the List<O> so I do not want them

问题 In Spring Batch, processors Map from one of an Input type to one of an Output type. However I have a need to generate a list of Output type ( List<O> ) from one I . The processor can return the List<O> just fine, but supposing I want to work with the elements of this list as individuals in subsequent processors. Am I expected to write them to the database first? In fact I have some enrichment from a remote service that needs to be done to each member of the List<O> so I do not want them

问题 I am working on the 3 steps Spring Batch project. Firstly, it downloads needed text files from ftp to local, then process it, and finally delete files in the local directory every 10 minutes. And every 10 minutes there are new files loaded in the FTP. What if there emerge some problem in the FTP and it does not load new files? Then Spring Batch project download same file and process it again. So my question is that how can avoid Spring Batch to process same file twice? Edit: I have used

问题 I am working on the 3 steps Spring Batch project. Firstly, it downloads needed text files from ftp to local, then process it, and finally delete files in the local directory every 10 minutes. And every 10 minutes there are new files loaded in the FTP. What if there emerge some problem in the FTP and it does not load new files? Then Spring Batch project download same file and process it again. So my question is that how can avoid Spring Batch to process same file twice? Edit: I have used

问题 I am using the same code: na] Caused by: java.sql.SQLSyntaxErrorException: ORA-00942: table or view does not exist - Spring Batch and unable to save the records into DB. I already have the table created CREATE TABLE "BATCH".employee ( rowid_object int4 NOT NULL, status varchar NULL ) WITH ( OIDS=FALSE ) ; -- Permissions ALTER TABLE "BATCH".employee OWNER TO postgres; LifeCycleStatusWriter.java @Component public class EmployeeWriter implements ItemWriter<Employee> { @Autowired @Qualifier(value

问题 I am developing Spring Boot v2.2.6.RELEASE + Spring Batch . In this example, I am looking to read csv file, load the data into mysql and spring batch metadata tables into the Postgres database. But This gives me error: java.lang.IllegalStateException: Failed to execute CommandLineRunner at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:787) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at org.springframework.boot.SpringApplication.callRunners(SpringApplication

问题 I am developing Spring Boot v2.2.6.RELEASE + Spring Batch . In this example, I am looking to read csv file, load the data into mysql and spring batch metadata tables into the Postgres database. But This gives me error: java.lang.IllegalStateException: Failed to execute CommandLineRunner at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:787) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at org.springframework.boot.SpringApplication.callRunners(SpringApplication