MongoDB with JAVA Persistence API ( JPA) [closed] - java

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I new in mongodb , i have few question about mongodb with jpa
1) why to use mongodb with jpa
2) why to not use mongodb with jpa

There's no need to use JPA for MongoDB since it is a document database and so there's no step for mapping Java fields to columns. You can use native Java POJO with the MongoDB Java driver and it will automatically discover and persist fields for you.
See the Quick Start for a demo.

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Can I create queries in Arango DB using the Java interface? [closed]

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Although I can create and store queries using the Arango client, I can't find a way to create and retrieve them using the Arango java driver. The only place I can see a QueryEntity returned is when asking for long running queries.
In the same way I create Collections and graphs programmatically using the java api, I also want to create a few queries for debugging. I can't find a way to do this using the java api.

How to test CRUD operation API without database interaction? [closed]

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How to test CRUD operation API without database interaction i.e with mock connection in Junit?
You may use db mock
https://www.npmjs.com/package/db-mock
or use mockito https://github.com/mockito/mockito
If you are using an ORM like Hibernate and do not issue any vendor specific SQL statements, you can also use an in-memory DB like H2.
You can Use Postman App Extension For Google Chrome,
Get Postman
This Works Well for MongoDB and API declared in Express.js.
Dont worry this will work with your Junit as Well.

Spring JPA specification [closed]

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I would like to use AND OR operator in same query as below using spring JPA Specification:-
SELECT * FROM areatbl where MAXIMUM = 100 and areacode = 1 or areacode=3;
Can some one please guide me how to do it ?
You should use any popular JPA implementation (like Hibernate, Eclipse Link, Open JPA) and integrate it into your Spring container.
There are plenty of Hibernate + Spring tutorials in the web - it is the most popular combination of tools

is HikariCP be useful for MongoDB? [closed]

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i am trying to use HikariCP for mongodb to get best for db connections.
but HikariCP doesn't have driver for mongodb.
Let me know is that true? is there any possible way to integrate HikariCP with mongodb?
HikariCP is a JDBC connection pool. You can't use it for NoSQL databases. It also doesn't have drivers for anything: it's a connection pool, so it uses JDBC drivers but you have to provide them.

Does spring-data-redis support redis clusters? [closed]

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Does spring-data-redis support redis clusters?
Any example will be helpful for me.
Spring Data Redis delegates the Redis connection to a driver library, and Jedis does support clustering. (JRedis is also supported by SDR, but the project appears to have been discontinued as of 2011.)
Sentinels are supported, but only with Jedis.

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