NullPointerException when trying to read Database Queries in spring batch ItemProcessor
Question
public class TransactionHistoryCsvItemProcessor implements ItemStream, ItemProcessor<TransactionHistory,TransactionHistory>{
@Autowired
private TransactionHistoryRepository transactionHistoryRepository;
@Autowired
private ProductHierarchyRepository productHierarchyRepository;
@Autowired
private LocationHierarchyRepository locationHierarchyRepository;
List<TransactionHistory>list= transactionHistoryRepository.findAll();
List<String> pLevel7Products = productHierarchyRepository.getPLevel7Ids();
List<String> level5locations=locationHierarchyRepository.getLevel5Ids();
int count=1;
TransactionHistoryCsvItemProcessor(){
}
private Set<TransactionHistory> processedData = new HashSet<TransactionHistory>();
@Override
public TransactionHistory process(TransactionHistory transactionHistory) throws Exception {
TransactionHistory processedObj = new TransactionHistory();
if (pLevel7Products.contains(transactionHistory.getProductId().trim())) {
if (level5locations.contains(transactionHistory.getLocationId().trim())) {
if(list!=null&&!list.isEmpty()){
if(list.contains(transactionHistory)){
count++;
throw new MyOwnException(" duplicates data error", transactionHistory.getProductId().trim(),
transactionHistory.getLocationId().trim(), transactionHistory.getPeriodId(),
transactionHistory.getQuantity(), "at line numer ", count-1);
}
}
processedObj.setProductId(transactionHistory.getProductId().trim());
processedObj.setLocationId(transactionHistory.getLocationId().trim());
processedObj.setQuantity(transactionHistory.getQuantity());
processedObj.setPeriodId(transactionHistory.getPeriodId());
processedObj.setCreatedDate(LocalDate.now());
processedData.add(transactionHistory);
transactionHistory.setItemCount(count);
count++;
}else {
System.out.println("failed location");
count++;
transactionHistory.setItemCount(count);
throw new MyOwnException(" location data error", transactionHistory.getProductId().trim(),
transactionHistory.getLocationId().trim(), transactionHistory.getPeriodId(),
transactionHistory.getQuantity(), "at line numer ", count-1);
}
} else {
System.out.println("failed product");
// count++;
try {
transactionHistory.setItemCount(count);
throw new MyOwnException(" product data error", transactionHistory.getProductId().trim(),
transactionHistory.getLocationId().trim(), transactionHistory.getPeriodId(),
transactionHistory.getQuantity(), "at line numer ", count);
} catch (MyOwnException e) {
System.out.println("product error");
throw new MyOwnException(" product data error", transactionHistory.getProductId().trim(),
transactionHistory.getLocationId().trim(), transactionHistory.getPeriodId(),
transactionHistory.getQuantity(), "at line numer ", count);
} finally {
count++;
}
}
//}
if (processedObj.getProductId() == null && processedObj.getLocationId() == null)
return null;
else {
// processedData.add(processedObj);
return processedObj;
}
}
@Override
public void open(ExecutionContext executionContext) throws ItemStreamException {
// TODO Auto-generated method stub
//list=transactionHistoryRepository.findAll();
}
@Override
public void update(ExecutionContext executionContext) throws ItemStreamException {
// TODO Auto-generated method stub
}
@Override
public void close() throws ItemStreamException {
// TODO Auto-generated method stub
count=1;
}
}
//============================================//
@Bean
public Step transactionHistoryStep() {
return ((SimpleStepBuilder<TransactionHistory, TransactionHistory>) stepBuilderFactory.get("transactionHistoryStep")
.<TransactionHistory,TransactionHistory>chunk(10)
.reader(reader())
.processor(processor())
.writer(writer())
.stream(new TransactionHistoryCsvItemProcessor()))
.faultTolerant()
.skipPolicy(transactionHistoryCsvImportSkipPolicy)
.build();
}
@Bean
@JobScope
public FlatFileItemReader<TransactionHistory> reader() {
FlatFileItemReader<TransactionHistory> flatFileItemReader= new FlatFileItemReader<TransactionHistory>();
try {
TransactionHistoryFieldSetMapper transactionHistoryFieldSetMapper= new TransactionHistoryFieldSetMapper();
flatFileItemReader.setResource(new FileSystemResource(FileResources.mappingFileResouces("transactionHistoryImportCsvFile")));
flatFileItemReader.setName("CSV-Reader");
flatFileItemReader.setLinesToSkip(1);
flatFileItemReader.setLineMapper(new DefaultLineMapper<TransactionHistory>(){{
setLineTokenizer(new DelimitedLineTokenizer() {{
setNames("productId","locationId","periodId","quantity");
setFieldSetMapper(transactionHistoryFieldSetMapper);
}});
setFieldSetMapper(new TransactionHistoryFieldSetMapper(){{
//setTargetType(TransactionHistory.class);
}});
}});
}
catch(Exception e) {
e.printStackTrace();
logger.error("read error"+flatFileItemReader);
}
return flatFileItemReader;
}
@Bean
public ItemProcessor<TransactionHistory, TransactionHistory> processor() {
return new TransactionHistoryCsvItemProcessor();
}
//===========error ====//
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled. 2020-May-05 22:30:13.654 ERROR [main] osbSpringApplication - Application run failed org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'transactionHistoryController': Unsatisfied dependency expressed through field 'transactionHistoryCsvImportJob'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionHistoryJob' defined in class path resource [com/datalabsindia/batch/TransactionHistoryCsvImport.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.batch.core.Job]: Factory method 'transactionHistoryJob' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionHistoryStep' defined in class path resource [com/datalabsindia/batch/TransactionHistoryCsvImport.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.batch.core.Step]: Factory method 'transactionHistoryStep' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'processor' defined in class path resource [com/datalabsindia/batch/TransactionHistoryCsvImport.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.batch.item.ItemProcessor]: Factory method 'processor' threw exception; nested exception is java.lang.NullPointerException at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:596) at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:90) at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:374) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1411) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:592) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFacto ry.createBean(AbstractAutowireCapableBeanFactory.java:515) at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:845) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877) at org.springf ramework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:743) at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:390) at org.springframework.boot.SpringApplication.run(SpringApplication.java:312) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1214) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1203) at com.datalabsindia.ScpApplication.main(ScpApplication.Z93F725A07423FE1C889F448B33D21F4 6Z:21) Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionHistoryJob' defined in class path resource [com/datalabsindia/batch/TransactionHistoryCsvImport.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.batch.core.Job]: Factory method 'transactionHistoryJob' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionHistoryStep' defined in class path resource [com/datalabsindia/batch/TransactionHistoryCsvImport.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.batch.core.Step]: Factory method 'transactionHistoryStep' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'processor' defined in class path resource [com/datalabsindia/batch/TransactionHistoryCsvImport.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.batch.item.ItemProcessor]: Factory method 'processor' threw exception; nested exception is java.lang.NullPointerException at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:627) at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:456) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1321) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1160) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(Abstrac tAutowireCapableBeanFactory.java:515) at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:277) at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1251) at org.springframework.beans.factory.support.DefaultListableB eanFactory.resolveDependency(DefaultListableBeanFactory.java:1171) at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:593)... 19 common frames omitted Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.batch.core.Job]: Factory method 'transactionHistoryJob' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionHistoryStep' defined in class path resource [com/datalabsindia/batch/TransactionHistoryCsvImport.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.batch.core.Step]: Factory method 'transactionHistoryStep' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'processor' defined in class path resource [com/datalabsindia/batch/TransactionHistoryCsvImport.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.batch.item.ItemProcessor]: Factory method 'processor' threw exception; nested exception is java.lang.NullPointerException at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:622)... 32 common frames omitted Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionHistoryStep' defined in class path resource [com/datalabsindia/batch/TransactionHistoryCsvImport.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.batch.core.Step]: Factory method 'transactionHistoryStep' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'processor' defined in class path resource [com/datalabsindia/batch/TransactionHistoryCsvImport.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.batch.item.ItemProcessor]: Factory method 'processor' threw exception; nested exception is java.lang.NullPointerException at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:627) at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:456) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1321) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1160) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(Abstrac tAutowireCapableBeanFactory.java:515) at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.resolveBeanReference(ConfigurationClassEnhancer.java:394) at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:366) at Z4D236D9A2D102 C5FE6AD1C50DA4BEC50Z.datalabsindia.batch.TransactionHistoryCsvImport$$EnhancerBySpringCGLIB$$669179a6.transactionHistoryStep() at com.datalabsindia.batch.TransactionHistoryCsvImport.transactionHistoryJob(TransactionHistoryCsvImport.java:97) at com.datalabsindia.batch.TransactionHistoryCsvImport$$EnhancerBySpringCGLIB$$669179a6.CGLIB$transactionHistoryJob$3() at com.datalabsindia.batch.TransactionHistoryCsvImport$$EnhancerBySpringCGLIB$$669179a6$$FastClassBySpringCGLIB$$d1625b5b.invoke() at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244) at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:363) at com.datalabsindia.batch.TransactionHistoryCsvImport$$EnhancerBySpringCGL IB$$669179a6.transactionHistoryJob() at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154)... 33 common frames omitted Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.batch.core.Step]: Factory method 'transactionHistoryStep' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'processor' defined in class path resource [com/datalabsindia/batch/TransactionHistoryCsvImport.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.batch.item.ItemProcessor]: Factory method 'processor' threw exception; nested exception is java.lang.NullPointerException at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:622)... 56 common frames omitted Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'processor' defined in class path resource [com/datalabsindia/batch/TransactionHistoryCsvImport.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.batch.item.ItemProcessor]: Factory method 'processor' threw exception; nested exception is java.lang.NullPointerException at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:627) at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:456) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1321) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1160) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(Abstrac tAutowireCapableBeanFactory.java:515) at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.resolveBeanReference(ConfigurationClassEnhancer.java:394) at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:366) at Z4D236D9A2D102 C5FE6AD1C50DA4BEC50Z.datalabsindia.batch.TransactionHistoryCsvImport$$EnhancerBySpringCGLIB$$669179a6.processor() at com.datalabsindia.batch.TransactionHistoryCsvImport.transactionHistoryStep(TransactionHistoryCsvImport.java:105) at com.datalabsindia.batch.TransactionHistoryCsvImport$$EnhancerBySpringCGLIB$$669179a6.CGLIB$transactionHistoryStep$4() at com.datalabsindia.batch.TransactionHistoryCsvImport$$EnhancerBySpringCGLIB$$669179a6$$FastClassBySpringCGLIB$$d1625b5b.invoke() at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244) at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:363) at com.datalabsindia.batch.TransactionHistoryCsvImport$$EnhancerBySpringCGLIB$$669179 a6.transactionHistoryStep() at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154)... 57 common frames omitted Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.batch.item.ItemProcessor]: Factory method 'processor' threw exception; nested exception is java.lang.NullPointerException at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:622)... 80 common frames omitted Caused by: java.lang.NullPointerException: null at com.datalabsindia.batch.TransactionHistoryCsvItemProcessor.(TransactionHistoryCsvItemProcessor.java:55) at com.datalabsindia.batch.TransactionHistoryCsvImport.processor(TransactionHistoryCsvImport.java:160) at com.datalabsindia.batch.TransactionHistoryCsvImport$$EnhancerBySpringCGLIB$$669179a6.CGLIB$processor$2() at Z4D236D9A2D102C5FE6 AD1C50DA4BEC50Z.datalabsindia.batch.TransactionHistoryCsvImport$$EnhancerBySpringCGLIB$$669179a6$$FastClassBySpringCGLIB$$d1625b5b.invoke() at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244) at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:363) at com.datalabsindia.batch.TransactionHistoryCsvImport$$EnhancerBySpringCGLIB$$669179a6.processor() at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154)... 81 common frames omi tted
1 answers
solution1
0 2020-05-11 19:41:42
The exception you are encountering is due to your attempt to use an @Autowire d dependency before you have any guarantees that that dependency has been injected into your TransactionHistoryCsvItemProcessor object.
Factory method 'processor' threw exception; nested exception is java.lang.NullPointerException at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:596)
These are the problematic lines:
List<TransactionHistory>list= transactionHistoryRepository.findAll();
List<String> pLevel7Products = productHierarchyRepository.getPLevel7Ids();
List<String> level5locations=locationHierarchyRepository.getLevel5Ids();
If you need to do some additional initialization of your TransactionHistoryCsvItemProcessor object, the easiest thing to do is have TransactionHistoryCsvItemProcessor implement InitializingBean , and then initialize your List s in the overridden method afterPropertiesSet .
For example ,
public class TransactionHistoryCsvItemProcessor
implements InitializingBean, ItemStream, ItemProcessor<TransactionHistory,TransactionHistory>{
@Autowired
private TransactionHistoryRepository transactionHistoryRepository;
@Autowired
private ProductHierarchyRepository productHierarchyRepository;
@Autowired
private LocationHierarchyRepository locationHierarchyRepository;
List<TransactionHistory> list;
List<String> pLevel7Products;
List<String> level5locations;
// ...implementation omitted for brevity
@Override
public void afterPropertiesSet() throws Exception {
// typical null checks would also be prudent
list = transactionHistoryRepository.findAll();
pLevel7Products = productHierarchyRepository.getPLevel7Ids();
level5locations = locationHierarchyRepository.getLevel5Ids();
}
}
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