I want to route all jpa-generated jdbc requests to Oracle packages that actualy perform select/insert/update/delete queries. Is there any possible way to do this?
Update: there is no problem to generate Oracle packages for this usage, the problem is in customization of generated JDBC requests.
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I created user in oracle database and I am trying to create session but I find many ways in spring boot so what is the easy way if I want to create classe connections using the Username and Password ?
You can jdbc template, spring data JDBC or spring data JPA, well depending on your use case.
If your data model is quite complex, you should avoid using the JDBC template as you will need to write prepared statements which can be cumbersome. JPA will allow you to use object-oriented programming principles and also will help you map the entities to your database columns.
For example, if you are going to use spring data JPA, you need to set the application properties as follows:
spring.datasource.type=oracle.oracleucp.jdbc.UCPDataSource
spring.datasource.oracleucp.connection-factory-class-name=oracle.jdbc.pool.OracleDataSource
spring.datasource.oracleucp.sql-for-validate-connection=select * from dual
spring.datasource.oracleucp.connection-pool-name=UcpPoolBooks
spring.datasource.oracleucp.initial-pool-size=5
spring.datasource.oracleucp.min-pool-size=5
spring.datasource.oracleucp.max-pool-size=10
This would behind the scene create an Oracle Datasource. In this example, we are using Oracle Universal Connection Pooling. You can also use HikariCP which is quite popular.
check this out
If you want to use UCP with above properties then you must have SpringBoot version higher than 2.4.0.
Check out the Spring Boot code sample on GitHub.
Is Spring Data JDBC v1.1.5 recommended for Oracle Database and Enterprise Applications? Lot of samples around the net based on Open Source RDBMS (H2 or PostgreSQL). We are using Spring Data JDBC in a Spring Boot Microservice Application, facing following problems.
Force to write custom converters for oracle.sql.TIMESTAMP, oracle.sql.TIMESTAMPTZ and oracle.sql.DATE and oracle.sql.ROWID etc..
Can't type cast oracle.sql.ROWID to java.lang.Number
Identity must not be null after save.
Spring Data JDBC is absolutely recommended for Enterprise Applications.
Not so much for use with Oracle.
Since the necessary resources (database & JDBC driver) weren't available in a form that could be easily used in integration tests on public platforms, Oracle isn't included in regular builds.
Therefore it is likely that one encounters issues when working with Oracle.
Some are already known, for others issues in Jira or even PRs are highly appreciated.
I am trying to solve problem by using properties file but in properties file we can handle only database driver problem.if we want to mysql to oracle database need to change all my query.the problem is now how to make query independent without hibernate api?? please suggest
We are using JPA/Hibernate for project where we need to insert, say 10000 records in database with multiple joins/relations etc. The functionality is fine but the performance is really slow.
Just wondering if migrating to JDBC will help in some performance gain?
Thanks,
-csn
You can do batch inserts with JPA/Hibernate - see "Batch processing".
You would almost certainly get better performance by doing batch inserts in JDBC (addBatch(), etc), but the Hibernate method may be more desirable if your schema is complex.
If you use JDBC batches, make sure that you do all of your addBatch() calls in a transaction.
If you happen to be using MySQL, be sure to add rewriteBatchedStatements=true to your connection parameters.
I am looking for a tool that Logs SQL statemetns fired in the application as I use the application.
I found p6spy. But there is an issue with that. It doesnt seem to be compatible with XA Datasources.
Is there a way to make p6spy work on Websphere 6.1 OR is there an alternative to p6spy ?
Also, if anyone has any AspectJ code that intercepts the PreparedStatment object and dumps the SQL, that would also be great.
It is not mandatory for the JDBC drivers to implement a feature to be able to extract / print out the SQL statements. To be honest, I would do this in database. All reasonable database products can log in detail everything that comes in. Also, you can at the same time get further information like execution plans and their impact on the server.
It does depend on the way that you are accessing the database. If you are using Hibernate then you can make that spit out its SQL, if you are accessing the datasource through WAS then you can use the trace service. Set the trace to something like:
=info: com.ibm.websphere.rsadapter.=detail
And see what you get out of it.
I seem to remember there being some parameter you can add to your jdbc url configuration, and/or the connection. Can't remember the details.
You shold change trace level into jdbc driver.
If you using DB2 then change custom properties for data source
if you using Oracle then change driver on the ojbdc6_g.jar and change JVM properties