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Java Stream GroupBy and Reduce

I have an Item class which contains a code, quantity and amount fields, and a list of items which may contain many items (with same code). I want to group the items by code and sum up their quantities and amounts. I was able to achieve half of it using stream’s groupingBy and reduce. The grouping by worked, but the

Correct Use Of Factory Pattern?

I have been doing research on the factory design pattern and was wondering if the below example, while not “textbook” is technically a correct use of it. Is there another design pattern that may fit the situation better? Answer IMO: Looks like the given code example actually implemented the Factory Method pattern with using the Method Object solution https://refactoring.guru/replace-method-with-method-object. Because

Spring boot “no transaction is in progress” with 2 datasources

I have two databases and i’m trying to save some records to both of them inside a service method. This gives me the error: org.springframework.dao.InvalidDataAccessApiUsageException: no transaction is in progress; nested exception is javax.persistence.TransactionRequiredException: no transaction is in progress. Here is entities: And here is one of the config files for multiple db connection: And here is the other one:

Getting a No Serializer Found for class when trying to test a method with ObjectMapper

I am getting this exception – java.lang.IllegalArgumentException: No serializer found for class org.mockito.internal.creation.bytebuddy.ByteBuddyCrossClassLoaderSerializationSupport and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) (through reference chain: org.mockito.codegen.Object$MockitoMock$[“mockitoInterceptor”]->org.mockito.internal.creation.bytebuddy.MockMethodInterceptor[“serializationSupport”]) The Testcase I’m writing looks like this The method I’m trying to test: I see that I can disable SerializationFeature.FAIL_ON_EMPTY_BEANS, but I have no control over the base class, I can

Mockito not working when using Model Mapper

I have an User class: And an UpdateUserDTO class: And an UserDTO class: I’ve used Model Mapper to map the updated fields from updateUserDTO to user, which comes from the DB. My test class looks like this: But the first Mockito.when() line does not even compile, because mapper.map() is a void method, so it does not expect any return values.

How to match the string and click on selenium webdriver

I Have an two string in Auto suggestion Dropdown Like 1. qapostgres112axdef 2. qapostgres112 I need to match the second value (qapostgres112) and need to click on it. for that I used the contains() method. since, both the String contains the same characters ‘qapostgres112’ selenium performs click operation on first string. Answer Since both the options contain qapostgres112, the contains()

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