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How to implement JAVA underlying transaction management and optimization requires specific code examples
In Java applications, transaction management is a very important part. Transaction management can ensure that a series of database operations are either successfully executed or rolled back if they fail, thereby ensuring data consistency and integrity. Java provides a wealth of APIs and frameworks to implement transaction management. This article will introduce how to implement Java's underlying transaction management and optimization, and give specific code examples.
In Java, a transaction is the execution unit of a group of related operations. These operations are either all executed successfully or all fail and are rolled back. Transactions have ACID (Atomicity, Consistency, Isolation, Durability) characteristics to ensure the consistency of database operations.
Java provides a variety of transaction management methods, and there are two common ones: programmatic transaction management and declarative transaction management.
Using programmatic transaction management, we need to manually call the relevant methods of the transaction manager to control the start, commit and rollback. The specific implementation steps are as follows:
TransactionManager transactionManager = new TransactionManager();
transactionManager.begin();
try { // 执行数据库操作 // ... // 操作成功,则提交事务 transactionManager.commit(); } catch (Exception e) { // 操作失败,则回滚事务 transactionManager.rollback(); }
Using declarative transaction management, we need to declare the attributes of the transaction in the configuration file or annotation, and then The container or framework implements transaction management. The specific implementation steps are as follows:
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean>
<tx:advice id="txAdvice" transaction-manager="transactionManager"> <tx:attributes> <tx:method name="save*" propagation="REQUIRED" isolation="READ_COMMITTED" /> <tx:method name="update*" propagation="REQUIRED" isolation="READ_COMMITTED" /> <tx:method name="delete*" propagation="REQUIRED" isolation="READ_COMMITTED" /> <tx:method name="*" propagation="SUPPORTS" read-only="true" /> </tx:attributes> </tx:advice>
<aop:config> <aop:pointcut id="txPointcut" expression="execution(* com.example.service.*.*(..))" /> <aop:advisor advice-ref="txAdvice" pointcut-ref="txPointcut" /> </aop:config>
Transaction performance optimization It is very important for high-concurrency applications. Two examples of transaction optimization are given below:
Connection connection = dataSource.getConnection(); connection.setTransactionIsolation(Connection.TRANSACTION_READ_UNCOMMITTED);
The underlying transaction management of Java is an important means to ensure data consistency and integrity. This article introduces the basic concepts and two aspects of Java transaction management. Two common transaction management methods: programmatic transaction management and declarative transaction management. At the same time, specific code examples are given and transaction optimization methods are introduced. By correctly choosing a transaction management method that suits your application scenario and rationally optimizing the transaction design, the performance and stability of the application can be improved.
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