Integration Guide of Java Affairs API Framework and Database Affairs
The Java transaction API (Application Programming Interface) is a framework for handling database transactions. It provides a series of methods and tools for managing transactions in the application code.By using the transaction API, developers can ensure the consistency and atomicity of the database operation, as well as support for concurrent access and abnormal processing.
Integrated Java Affairs API and database transactions, the following steps are required:
1. Introduce transaction API: First, add the dependence of transaction API in the construction document of the project.For example, the following dependencies can be added to the maven project to the POM.XML file:
<dependency>
<groupId>javax.enterprise</groupId>
<artifactId>cdi-api</artifactId>
<version>2.0</version>
</dependency>
2. Create a transaction manager: In the application file of the application, define a transaction manager Bean.The transaction manager is responsible for managing the life cycle of managing affairs in the application.
import javax.transaction.*;
import javax.annotation.Resource;
public class TransactionManagerBean {
@Resource
private UserTransaction userTransaction;
public void begin() {
try {
userTransaction.begin();
} catch (NotSupportedException | SystemException e) {
// Treatment abnormalities
}
}
public void commit() {
try {
userTransaction.commit();
} catch (RollbackException | HeuristicMixedException | HeuristicRollbackException | SecurityException | IllegalStateException | SystemException e) {
// Treatment abnormalities
}
}
public void rollback() {
try {
userTransaction.rollback();
} catch (IllegalStateException | SecurityException | SystemException e) {
// Treatment abnormalities
}
}
}
3. Integrated transaction manager and database: In the database operation of transaction management, use the injected transaction manager to manage affairs.
import javax.inject.Inject;
public class DatabaseService {
@Inject
private TransactionManagerBean transactionManager;
public void performTransactionalOperation() {
try {
transactionManager.begin();
// Do the database operation in the affairs
// ...
transactionManager.commit();
} catch (Exception e) {
transactionManager.rollback();
// Treatment abnormalities
}
}
}
4. Configuration data source and connection pool: In order to enable the transaction manager to interact with the database, you need to configure the data source and connecting pool in the configuration file of the application.
<resource-ref>
<res-ref-name>jdbc/MyDataSource</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
<res-sharing-scope>Shareable</res-sharing-scope>
</resource-ref>
<resource-env-ref>
<resource-env-ref-name>ConcurrentResource</resource-env-ref-name>
<resource-env-ref-type>javax.sql.DataSource</resource-env-ref-type>
</resource-env-ref>
5. Configuration transaction manager: In the configuration file of the application, configure the appropriate transaction strategy and attributes for the transaction manager to meet the application of the application.
<transaction type="javax.sql.DataSource">
<provider>oracle</provider>
<properties>
<property name="IsolationLevel">SERIALIZABLE</property>
<property name="Timeout">60</property>
</properties>
</transaction>
Through the above steps, you can successfully integrate the Java affairs API and database affairs.Developers can use the transaction manager in the application to ensure the atomicity and consistency of database operations, and perform concurrency access and abnormal processing.In actual development, further configuration and expansion can be performed according to specific needs, and database operations can be performed within the transaction according to business logic.
I hope this article can help you integrate the Java affairs API and database affairs!
