Geronimo plug -in, connector 1.6: Learn about the work principle of the transaction manager (JTA11) in the Java class library (JTA11) working principle
Geronimo plug -in, connector 1.6: Learn about the work principle of the transaction manager (JTA11) in the Java class library (JTA11) working principle
introduction:
The transaction manager is one of the indispensable key components in modern applications, especially in complex enterprise -level applications.In the field of Java development, Java Affairs API (JTA) is one of the standard methods for realizing transaction management.This article will introduce the working principles of the JTA11 transaction manager in the Geronimo plug -in and connector 1.6, and provide some Java code examples to help readers better understand.
1. Introduction to JTA11 transaction manager:
JTA11 is part of the Java EE 8 specification, which is used to manage transactions in Java applications.It provides a way for applications to use standard APIs to interact with transaction resources (such as databases, message queues, etc.) for interaction.JTA11 uses two -stage submission protocol based on the X/Open XA standard to ensure the consistency and persistence of distributed transactions.Geronimo plug -in and connectors 1.6 follow the JTA11 specifications to allow developers to easily integrate and manage affairs.
2. The working principle of the transaction manager in the Geronimo plug -in and connectors 1.6:
The transaction manager in Geronimo plug -in and connectors 1.6 realizes the management of transaction through the following steps:
Step 1: Create a transaction manager
Using the Geronimo plug -in and connectors 1.6, we can use the `javax.transaction.transactionManager` interface to create a transaction manager instance.The following example code shows how to create a transaction manager in Java:
import javax.transaction.TransactionManager;
import org.apache.geronimo.transaction.manager.GeronimoTransactionManager;
TransactionManager transactionManager = new GeronimoTransactionManager();
Step 2: The beginning and submission of affairs
Once there is a code block that requires transaction management, we can start a new transaction by calling the `Begin ()" method, and call the `Commit ()" method after the operation is successful.The following example code shows how to perform the database operation in the affairs:
import javax.transaction.UserTransaction;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import javax.sql.DataSource;
UserTransaction userTransaction = transactionManager.getUserTransaction();
DataSource DataSource = // Get the data source
try {
userTransaction.begin();
Connection connection = dataSource.getConnection();
PreparedStatement preparedStatement = connection.prepareStatement("INSERT INTO table_name (column1, column2) VALUES (?, ?)");
preparedStatement.setString(1, value1);
preparedStatement.setString(2, value2);
preparedStatement.executeUpdate();
userTransaction.commit();
} catch (SQLException e) {
userTransaction.rollback();
e.printStackTrace();
}
Step 3: Configure transaction resources
In order to enable the transaction manager to identify and manage specific transaction resources, we need to configure the corresponding configuration file in the Geronimo server configuration file.Generally, this involves information related to the data source so that the transaction manager can interact with the database.The following example shows how to configure the data source in the GERONIMO server to configure the data source for JTA11 transaction manager:
<Resource id="dataSource" type="DataSource">
jdbcdriver = // Database driver
jdbcurl = // database URL
username = // database user name
password = // database password
</Resource>
Through the above steps, we can successfully use the JTA11 transaction manager in the Geronimo plug -in and connector 1.6.
in conclusion:
Affairs management plays a vital role in the development of modern Java applications, which ensures the consistency and reliability of data.In this article, we understand the working principle of the JTA11 transaction manager in the Geronimo plug -in and connectors 1.6.By using the example code, we show how to create transaction managers, start and submit affairs, and allocate related transaction resources.It is hoped that this article can help readers better understand the JTA11 transaction manager and apply these knowledge in actual projects.
