在使用ActiveMQ Artemis与MySQL的JDBC持久化时,可能会遇到一些问题。以下是一种解决方法,包含了代码示例:
问题描述: 在使用ActiveMQ Artemis与MySQL的JDBC持久化时,可能会出现以下问题:
解决方法:
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
public class MySQLConnectionTest {
public static void main(String[] args) {
Connection connection = null;
try {
Class.forName("com.mysql.cj.jdbc.Driver");
connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/mydb", "username", "password");
System.out.println("Connected to MySQL database!");
} catch (ClassNotFoundException e) {
System.out.println("MySQL JDBC driver not found!");
e.printStackTrace();
} catch (SQLException e) {
System.out.println("Failed to connect to MySQL database!");
e.printStackTrace();
} finally {
try {
if (connection != null) {
connection.close();
}
} catch (SQLException e) {
System.out.println("Failed to close MySQL connection!");
e.printStackTrace();
}
}
}
}
CREATE TABLE IF NOT EXISTS `mydb`.`messages` (
`id` INT NOT NULL AUTO_INCREMENT,
`message` VARCHAR(255) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
true
true
MYSQL
jdbc:mysql://localhost:3306/mydb
username
password
请注意替换jdbc-connection-url
,jdbc-user
和jdbc-password
为您自己的MySQL数据库连接信息。
import javax.jms.*;
import javax.naming.*;
public class ArtemisPersistenceTest {
public static void main(String[] args) {
try {
InitialContext initialContext = new InitialContext();
ConnectionFactory connectionFactory = (ConnectionFactory) initialContext.lookup("ConnectionFactory");
Destination destination = (Destination) initialContext.lookup("queue/MyQueue");
Connection connection = connectionFactory.createConnection();
Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
MessageProducer producer = session.createProducer(destination);
TextMessage message = session.createTextMessage("Hello, Artemis!");
producer.send(message);
System.out.println("Sent message: " + message.getText());
connection.close();
} catch (NamingException e) {
System.out.println("Failed to lookup JNDI resource!");
e.printStackTrace();
} catch (JMSException e) {
System.out.println("Failed to send message!");
e.printStackTrace();
}
}
}
请注意替换ConnectionFactory
和queue/MyQueue
为您自己的ActiveMQ Artemis的JNDI资源名称。
这些解决方法应该可以帮助您解决ActiveMQ Artemis与MySQL的JDBC持久化存在的问题。如果问题仍然存在,请检查日志文件以获取更多详细信息,并查阅ActiveMQ Artemis和MySQL的官方文档进行进一步的调试和研究。