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Is Spring Batch suitable to periodically delete records from DB


Is Spring Batch suitable to periodically delete records from DB

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Is Spring Batch suitable to periodically delete records from DB
Tag : spring , By : Andrew L.
Date : January 11 2021, 05:14 PM

To fix this issue You could create a new Spring Bean using the @Component annotation or reuse a service bean. Then, implement a method to delete this records and use the @scheduled annotation to configure when this method has to be executed.
Don't forget to add the @EnableAsyng annotation on your Spring Boot configuration class

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Spring Batch - Is it suitable for this usecase?


Tag : sql , By : Eniac
Date : March 29 2020, 07:55 AM
I wish this helpful for you I have a usecase that I need to evaluate and see if it is suitable for Spring Batch. I am trying to build a consolidation DB by gathering data from n different DBs by running Stored Procs (SP) on each and every DB separately, the results of the stored proc from n different DBs are consolidated in one consolidation DB, which will be further used for downstream processing. This consolidation process should run say thrice daily. I want to build a consolidation layer based on java that executes the SP in the n DBs and inserts the result in to the single consolidation DB. I am considering writing a multithreaded custom code to achieve this, as well as see if Spring batch is suitable or if there is a methodology that will completely eliminate the consolidation layer itself and directly do it via some DB methodology. for the help, pointers. , Spring Batch has the
org.springframework.batch.item.database.StoredProcedureItemReader 
org.springframework.batch.item.database.JdbcBatchItemWriter
<int-jdbc:stored-proc-inbound-channel-adapter/>

How to batch delete records using PyMongo


Tag : python , By : silvervino
Date : March 29 2020, 07:55 AM
around this issue Simply use remove the same way you use find.
If the following line returns the records to be removed:
db.animals.find({'color':'red'})
db.animals.remove({'color':'red'})
db.animals.remove({'_id': {'$in': idsToRemove}})

processing batch of records using spring batch before writing to DB


Tag : development , By : Adam
Date : March 29 2020, 07:55 AM
I wish this help you You could implement your own custom ItemProcessor to check for duplicates and drop them.
Here's an example :
public class DropDuplicateItemProcessor<T> implements ItemProcessor<T, T> {

    // Will be used to save previous items;
    private List<T> previousItems = new ArrayList<T>();

    @Override
    public T process(T item) throws Exception {

         // Check for duplicates with your own logic (method equals)
         if (previousItems.contains(item))
             return null; // Drop duplicate

         // Save item to check for duplicates later
         previousItems.add(item);

         // Continue with non-duplicate item
         return item;
    }

}

Spark batch delete records on hbase


Tag : apache-spark , By : Sandeep Arneja
Date : March 29 2020, 07:55 AM
wish help you to fix your issue Turn out that there's no simple way to do this, my final solution is to grab the data and delete them through hbase delete function instead of the spark-version delete for hbase.

Spring Batch more output records than input records


Tag : java , By : Ernie
Date : March 29 2020, 07:55 AM
With these it helps The answer of my question is here: Spring Batch - Using an ItemWriter with List of Lists
Accordingly Mahmoud Ben Hassine comment.
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