I tried to migrate the springboot application to the Dropwizard. However, I now have a problem that there is no framework in the Dropwizard that supports working with Cassandra databases, such as CRUD operations. Do any of you have any good suggestions?
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I am using spring boot app with mongodb, and postgres. And use spring data to interact with db. Need auditing for the changes which happen in the app. Currently exploring javers to do this. But is there any way where i can achieve auditing at migration level as well.
I'm new to Elastic search. We are building a Spring boot application with Elastic search.
For integrating my Spring boot application either we can use elasticsearch-rest-high-level-client or spring-boot-starter-data-elasticsearch.
Can anyone please elaborate on which option would be overall better and why?
spring-boot-starter-data-elasticsearch internally can use the transport(soon to be deprecated in ES 8.X) or rest-high-level-client Please refer elasticsearch client section for more information and how to configure them.
And from the same link :
Spring data Elasticsearch operates upon an Elasticsearch client that
is connected to a single Elasticsearch node or a cluster. Although the
Elasticsearch Client can be used to work with the cluster,
applications using Spring Data Elasticsearch normally use the higher
level abstractions of Elasticsearch Operations and Elasticsearch
Repositories.
Bottom line is that you can directly use rest-high-level client in your spring boot application but if you want more abstraction then you can use the spring-boot-starter-data-elasticsearch dependency and use its method which provides more abstraction although internally it would use the client offered by Elasticsearch.
I am using Spring Data MongoDB 2.2.1.RELEASE for MongoDB access. And flapdoodle embed mongo 2.2.0 as embedded MongoDB for testing. This setup works fine. But recently, I have added support for Spring transactions. And since, MongoDB supports transactions only on replica sets. I have created a replica set locally on my machine and tested transaction scenarios. All good till now. But now when I run my unit tests, #Transactional annotation added to service methods is breaking the application with below error since the embedded MongoDB is not a replica set.
com.mongodb.MongoClientException: Sessions are not supported by the MongoDB cluster to which this client is connected
My question is how to configure my application so the #Transactional feature does not break my application when using embedded or standalone MongoDB?
Suggestions much appreciated. Thanks !!
It is possible to run a 1-node replica set. You may consider this especially in tests so that your test environment more closely resembles your production one.
I was investigating "What's the difference between BigQuery and BigTable?".
And found that BigTable is like traditional database.
Also I found that for current moment Spring supports BigQuery but doesn't support BigTable. It is a bit surprising for me. Could you please explain why?
Is there way to use BigTable from spring boot application?
What is the difference between these Spring Boot jars.
spring-boot-starter-data-mongodb jar
spring-data-mongodb jar
mongodb-driver jar
mongodb-driver-core jar
What I understand in those all is that mongodb-driver is the java driver for mongoDB. And spring-boot-starter-data-mongodb is starter like spring boot has for many (spring-boot-starter-web, spring-boot-starter-test).
Can someone please explain their role in Spring boot.
mongodb-driver-core: The Java operations layer for the MongoDB Java Driver. Third parties can ' + 'wrap this layer to provide custom higher-level APIs.
mongodb-driver: The driver which allows you to connect to MongoDB databases from java applications.
spring-data-mongodb: The library you need to use Spring Data with MongoDB in your project, which might not be Spring Boot based.
spring-boot-starter-data-mongodb: The starter for using Spring Data Mongo DB in Spring Boot, with everything you need for that.
Note that each of these libraries makes use of the other ones above, so it increases abstraction.
See also:
https://mvnrepository.com/artifact/org.mongodb/mongodb-driver-core
https://projects.spring.io/spring-data-mongodb/
https://spring.io/guides/gs/accessing-data-mongodb/