I am trying to understand Spring Petclinic Application.
By default it seems that HSQL database and JPA is used, but I am unableto to find where the Hibernate Dialect for HSQL is mentioned in the application.
I understand that it is a mandatory property for Hibernate.
Kindly suggest
What about where org.hibernate.dialect.HSQLDialect and where the driver is org.hsqldb.jdbcDriver. Normally, if this is a Spring application, this will be present in an applicationContext.xml or tx-datasource.xml configuration file. Whatever is the case, these properties must be in one of the XML Spring configuration files. Of course, they may be in a Java class (an alternative), but in most applications, they are present in Spring XML files where the dataSource bean is defined. Usually, in web applications, that would be in directory under /WEB-INF or /webapp/WEB-INF.
Related
Following other links I have tried all configurations including enabling jndi of embedded tomcat container. (A very good detailed like is: https://www.roytuts.com/spring-boot-jndi-datasource/) But the problem is that the DataSource is looked up against JNDI and I get follwoing exception:
Please note that From Spring 2.0.x Embedded configuration classes have changed.
Get:
javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file: java.naming.factory.initial.
As for the question of JNDI lookup in Embedded tomcat is rare use case I am trying to simulate and reproduce a Database Connection Pooling Error in production and for that I have to use JavaConfig settings for Resource and DataSource both.
I generated my app using Jhispter. I'm trying to find configuration file for Hibernate and mappings file. Does anyone know how is this achieved in jhipster?
Hibernate configuration is done by Spring Boot application properties in application*.yml files in src/main/resources/config folder.
Mappings are done by JPA annotations (#Entity, #Column, ...) on entity classes in domain package.
I have spring boot application and it's basically a gradle project, so, I have below dependency added in my gradle file:
org.springframework.boot:spring-boot-gradle-plugin:1.5.1.RELEASE
Application gets deployed in embedded jetty server. I have following set of properties in application.properties for db connection polling:
spring.datasource.driver-class-name
spring.datasource.max-active
spring.datasource.max-idle
spring.datasource.min-idle
spring.datasource.validation-query
spring.datasource.name
I was referring to below two links:
https://github.com/spring-projects/spring-boot/wiki/Spring-Boot-1.4-Configuration-Changelog
https://github.com/spring-projects/spring-boot/wiki/Spring-Boot-1.5-Configuration-Changelog
I came to know that some of the datasource properties which used in application.properties file in my application are removed starting sprint boot version 1.4 but issue they haven't mentioned what are the new properties to use. Like for tomcat server they have provided all set of properties but not for jetty server. I am facing some db related errors like 'too many connections' after my application run for sometime, my assumption is that datasource props I am currently using are not correct and should be replaced with correct values, but unfortunately I am unable to find correct property names.
Jetty doesn't have its own Pooling DataSource implementation. You can include HikariCP in your project and customise using the spring.datasource.hikari.* properties. With each property matching the bean properties that can be set on Hikari's datasource implementation.
I am trying to write Spring Boot application to connect to a Teiid database, I want to use JPA layer on it. I have configured the JDBC Data Source, but since this not well-known database in Spring JPA libraries do not autodetect this source. I have manually setup "spring.jpa.*" properties too. I do have a Hibernate dialect for this database, and it is on the classpath.
So, how does one need to configure JPA layer for a not well-known database in Spring Boot? Thank you for your time.
Ramesh..
This is fairly well defined in the Spring Boot documentation.
You can set this explicitly in the application.properties file
spring.datasource.url=jdbc:mysql://localhost/test
spring.datasource.username=dbuser
spring.datasource.password=dbpass
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
I am having a Java standalone application, which is using the Spring core container and spring jdbc. I have different database environments like dev,int,uat,prod. These database configuration details and datasources for each environments are configured in spring configuration file spring-beans.xml along with the DAO beans.
Now i have to update the application, like if i passed a particular the database environment(like dev,int,uat,prod) as arguments at the time of running the application, the application will invoke the database as mentioned in the arguments. is there any way out?
i think you should used spring with hibernate it much easier or you can use JDNI for that
db1Jndi=
jdbc.url=jdbc:mysql://localhost:3306/db1
jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.username=root
jdbc.password=root
db2Jndi=
jdbc.url=jdbc:mysql://localhost:3306/db2
jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.username=root
jdbc.password=root