How to configure a JDBC data source?
opts is a JDBCConnectionOptions object with these properties:
- Vendor — Database vendor name
- DataSourceName — Name of the data source
- DatabaseName — Name of the database
- Server — Name of the database server
- PortNumber — Port number
- AuthType — Authentication type
- JDBCDriverLocation — Full path of the JDBC driver file
What is, in terms of JDBC, a DataSource?
- A. At client side, a separate driver is needed for each database
- B. Type-4 driver is entirely written in Java
- C. The driver converts JDBC calls into vendor-specific database protocol
- D. It does not support to read MySQL data
How to get the list of all databases using JDBC?
The following are the getter methods in ResultSet:
- int getInt (int ColumnIndex): It is used to get the value of the specified column Index as an int data type.
- float getFloat (int ColumnIndex): It is used to get the value of the specified column Index as a float data type.
- java.sql.date getDate (int ColumnIndex): It is used to get the value of the specified column Index as a date value.
How to create a JDBC data source in virtual Dataport?
- Name: your choice, e.g.: sasxpt
- Database adapter: Generic
- Driver class path: C:\Denodo\Denodo Platform\lib-external\jdbc-drivers\cdata-sasxpt-19
- Driver class: cdata.jdbc.sasxpt.SASXptDriver
- Database URI: Set this to a JDBC URL using the necessary connection properties. ...
What is a DataSource Java?
A DataSource object is the representation of a data source in the Java programming language. In basic terms, a data source is a facility for storing data. It can be as sophisticated as a complex database for a large corporation or as simple as a file with rows and columns.
What is DataSource in JDBC what are its benefits?
Advantages of using DataSource Layer of abstraction– In an enterprise application you can configure JDBC DataSource in the application server and register it with JNDI. That way user just need to know the bound logical name for the DataSource and the DB specific details are hidden.
What is the data source?
A data source is the location where data that is being used originates from. A data source may be the initial location where data is born or where physical information is first digitized, however even the most refined data may serve as a source, as long as another process accesses and utilizes it.
What is DataSource in Spring JDBC?
Spring obtains a connection to the database through a DataSource . A DataSource is part of the JDBC specification and is a generalized connection factory. It allows a container or a framework to hide connection pooling and transaction management issues from the application code.
What is DataSource connection?
A data source connection specifies the parameters needed to connect to a database, such as the location of the database and the timeout duration. These parameters form a connection string for the data source. You can include authentication information for the database in the data source connection by creating a signon.
What is DataSource object?
A DataSource object represents a particular DBMS or some other data source, such as a file. If a company uses more than one data source, it will deploy a separate DataSource object for each of them. The DataSource interface is implemented by a driver vendor.
What are data source types?
There are three types of data sources: relational. multidimensional (OLAP) dimensionally modeled relational.
What are source data systems?
A data source is most commonly used in context with databases and database management systems or any system that primarily deals with data, and is referred to as a data source name (DSN), which is defined in the application so that it can find the location of the data.
What is a DataSource in Oracle?
A data source is a Java object that implements the javax. sql. DataSource interface. Data sources offer a portable, vendor-independent method for creating JDBC connections. Data sources are factories that return JDBC connections to a database.
How does the Spring DataSource work?
Spring Boot provides a very good support to create a DataSource for Database. We need not write any extra code to create a DataSource in Spring Boot. Just adding the dependencies and doing the configuration details is enough to create a DataSource and connect the Database.
What is connection pool in Java?
Connection pooling is a technique of creating and managing a pool of connections that are ready for use by any thread that needs them. Connection pooling can greatly increase the performance of your Java application, while reducing overall resource usage.
How do you configure a DataSource in Spring?
To configure your own DataSource , define a @Bean of that type in your configuration. Spring Boot reuses your DataSource anywhere one is required, including database initialization. If you need to externalize some settings, you can bind your DataSource to the environment (see “Section 25.8.
What are the advantages of hibernate over JDBC?
Hibernate support inheritance and association mapping. This is the major benefit of Hibernate over JDBC. In JDBC there is no concept of inheritance or association mapping. In association mapping, it is easy to save and manage the entity. For example, when we save parent entity the child entity will save automatically.
What is the use of JDBC in Java?
The JDBC API is a Java API that can access any kind of tabular data, especially data stored in a relational database. JDBC helps you to write Java applications that manage these three programming activities: Connect to a data source, like a database. Send queries and update statements to the database.
What is JDBC and how does it work?
JDBC or Java Database Connectivity is a Java API to connect and execute the query with the database. It is a specification from Sun microsystems that provides a standard abstraction(API or Protocol) for java applications to communicate with various databases.
Which of the following are advantages of the Hibernate framework?
Following are the advantages of hibernate framework:1) Open Source and Lightweight. Hibernate framework is open source under the LGPL license and lightweight.2) Fast Performance. ... 3) Database Independent Query. ... 4) Automatic Table Creation. ... 5) Simplifies Complex Join. ... 6) Provides Query Statistics and Database Status.
DataSource in Java-JDBC
In the examples given in the previous post Java JDBC Steps to Connect to DB we have seen how to get a connection using DriverManager class. That’s ok for sample code where you just need to test using a connection and close it. But in a real life application creating connection object every time DB interaction is needed will be very time consuming.
Advantages of using DataSource
Layer of abstraction – In an enterprise application you can configure JDBC DataSource in the application server and register it with JNDI. That way user just need to know the bound logical name for the DataSource and the DB specific details are hidden.
DataSource interface in Java
JDBC API provides an interface DataSource that has to be implemented by vendor specific DataSource implementations. DataSource interface is part of javax.sql package and it has two overridden methods.
DataSource Implementations
A JDBC driver should include at least a basic DataSource implementation. For example MySQL DB JDBC driver includes the implementation com.mysql.jdbc.jdbc2.optional.MysqlDataSource and Oracle DB’s implementation is oracle.jdbc.pool.OracleDataSource.
JDBC DataSource Examples
Let’s see some examples of DataSource in use. First let us see one example with MySQL DataSource. Though people prefer to use one of the connection pooling library Apache DBCP or mchange c3p0 atleast with stand alone Java programs, we’ll see example of these too.
MySQL DataSource Example
Here we have a DataSource class that is a singleton class giving the instance of MysqlDataSource. Also the schema in MySQL is netjs and table is Employee. You should have the mysql-connector jar in your class path.
DataSource example Using Apache DBCP
With stand alone Java programs where data source is needed it is more convenient to use connection pooling library like DBCP.
What is a DataSource object?
DataSource objects can be deployed to get connections that can be used in distributed transactions. As with connection pooling, two different class instances must be deployed: an XADataSource object and a DataSource object that is implemented to work with it.
Is EJB compatible with JDBC?
Many JDBC drivers are available that are compatible with the recently purchased EJB server. The owner now has a three-tier architecture, with a new EJB application server and JDBC driver in the middle tier and the two DBMS servers as the third tier. Client computers making requests are the first tier.
How to create a JDBC source?
To create a data source that retrieves data from a JDBC source, right-click on a database of the Server Explorer and click New > Data source > JDBC. The Tool will display the dialog to create the data source.
When creating JDBC base views from the wizard of the administration tool, the data source tries to obtain the description
When creating JDBC base views from the wizard of the administration tool, the data source tries to obtain the description of each column from the tables/views you are importing. Then, the data source sets the description of each field of the new base views so these fields have the same description as in the underlying database.
What is the Administration Tool in DB2?
During the process of creating a base view over a stored procedure of IBM DB2, the Administration Tool displays a dialog where you configure what data you want to obtain from the procedure. This dialog changes depending on the characteristics of the selected stored procedure:
What is base view in SQL Server?
During the process of creating a base view over a stored procedure of Microsoft SQL Server, the Tool displays a dialog where you configure what data you want to obtain from the procedure.
1. What is DataSource
A DataSource is a factory for connections to any physical data source. An alternative to the DriverManager facility. It uses a URL along with some credentials to establish a database connection.
2. Configuring a DataSource
Spring boot allows defining datasource configuration in both ways i.e. Java config and properties config. DataSourceAutoConfiguration checks for DataSource.class (or EmbeddedDatabaseType.class) on the classpath and few other things before configuring a DataSource bean for us.
3. Connection Pooling
For a pooling DataSource to be created, Spring boot verifies that a valid Driver class is available. If we set spring.datasource.driver-class-name property then that mentioned driver class has to be loadable.
4. Multiple Datasources with Spring boot
To configure multiple data sources, create as many bean definitions you want but mark one of the DataSource instances as @Primary, because various auto-configurations down the road expect to be able to get one by type.
5. Conclusion
Spring boot provides very easy ways to create datasource beans – either using properties config or using java config @Bean. Spring boot provides ready-made auto configuration to use which can be further customized with advanced options in application.properties file.
