尝试使用 Tomcat、Atomikos、ActiveMQ 和 MySql 使事务正常工作。遵循以下示例: Tomcat 7 Integration with Atomikos 3.5.2 和 Tomcat 7.0.27 Integration with Atomikos 3.7.1没有成功...
ERROR: com.atomikos.icatch.jta.UserTransactionManager cannot be cast to javax.transaction.TransactionManager
java.lang.ClassCastException: com.atomikos.icatch.jta.UserTransactionManager cannot be cast to javax.transaction.TransactionManager
使用:
- Tomcat 7.0.29
- Atomikos 3.7.1
- ActiveMQ 5.8.0
- MySQL 5.5.31
将以下 jar 放在 $TOMCAT_HOME/lib 下
- atomikos-integration-extension-3.7.1-20120529.jar
- atomikos-util-3.7.1.jar
- transactions-3.7.1.jar
- transactions-api-3.7.1.jar
- transactions-jdbc-3.7.1.jar
- transactions-jms-3.7.1.jar
- transactions-jta-3.7.1.jar
- geronimo-jta_1.0.1B_spec-1.0.jar
- activemq-all-5.8.0.jar
- mysql-connector-java-5.1.25.jar
这里是transactions.properties的内容
com.atomikos.icatch.service=com.atomikos.icatch.standalone.UserTransactionServiceFactory
com.atomikos.icatch.automatic_resource_registration=true
com.atomikos.icatch.output_dir=../work/atomikos
com.atomikos.icatch.log_base_dir=../work/atomikos/log
com.atomikos.icatch.enable_logging=true
com.atomikos.icatch.console_log_level=TRACE
上下文.xml
<?xml version="1.0" encoding="UTF-8"?>
<Context>
<WatchedResource>WEB-INF/web.xml</WatchedResource>
<Transaction factory="com.atomikos.icatch.jta.UserTransactionFactory" />
<Resource name="TransactionManager"
auth="Container"
type="com.atomikos.icatch.jta.UserTransactionManager"
factory="org.apache.naming.factory.BeanFactory" />
<Resource name="UserTransaction"
auth="Container"
type="com.atomikos.icatch.jta.UserTransactionImp"
factory="org.apache.naming.factory.BeanFactory" />
<Resource name="jms/ConnectionFactory"
auth="Container"
description="JMS Connection Factory"
type="com.atomikos.jms.AtomikosConnectionFactoryBean"
factory="com.atomikos.tomcat.EnhancedTomcatAtomikosBeanFactory"
uniqueResourceName="jms/ConnectionFactory"
xaConnectionFactoryClassName="org.apache.activemq.ActiveMQXAConnectionFactory"
xaProperties.brokerURL="vm://localhost"
xaProperties.transportType="1"
localTransactionMode="true" />
<Resource name="jms/WsTopic"
auth="Container"
type="org.apache.activemq.command.ActiveMQTopic"
factory="org.apache.activemq.jndi.JNDIReferenceFactory"
physicalName="WS.TOPIC" />
<Resource name="jms/WsQueue"
auth="Container"
type="org.apache.activemq.command.ActiveMQQueue"
factory="org.apache.activemq.jndi.JNDIReferenceFactory"
physicalName="WS.QUEUE" />
<!-- MySQL -->
<Resource name="jdbc/DB"
auth="Container"
type="com.atomikos.jdbc.AtomikosDataSourceBean"
factory="com.atomikos.tomcat.EnhancedTomcatAtomikosBeanFactory"
uniqueResourceName="jdbc/DB"
minPoolSize="5"
maxPoolSize="10"
testQuery="SELECT 1 FROM DUAL"
xaDataSourceClassName="com.mysql.jdbc.jdbc2.optional.MysqlXADataSource"
xaProperties.databaseName="db"
xaProperties.serverName="localhost"
xaProperties.port="3306"
xaProperties.user="user"
xaProperties.password="password"
xaProperties.url="jdbc:mysql://localhost:3306/db"
xaProperties.pinGlobalTxToPhysicalConnection="true"
xaProperties.autoReconnect="true"
xaProperties.autoReconnectForConnectionPools="true"
xaProperties.autoReconnectForPools="true" />
</Context>
相关java代码:
import javax.transaction.Transaction;
import javax.transaction.TransactionManager;
import javax.transaction.UserTransaction;
...
Hashtable<String, String> hashTable = new Hashtable<String, String>();
try {
Context ctx = new InitialContext(hashTable);
ctx = (Context) jndiContext.lookup("java:comp/env");
TransactionManager transactionManager = (TransactionManager) ctx.lookup("TransactionManager");
} catch (Exception e) {
e.printStackTrace();
}
我做错了什么?
编辑:
从 $TOMCAT_HOME/lib 中删除 activemq-all-5.8.0.jar 后,我能够克服原来的错误,但现在我得到:
com.atomikos.jms.AtomikosJMSException: Error in proxy
at com.atomikos.jms.AtomikosJMSException.throwAtomikosJMSException(AtomikosJMSException.java:54)
at com.atomikos.jms.ConsumerProducerSupport.handleException(ConsumerProducerSupport.java:61)
at com.atomikos.jms.AtomikosJmsMessageConsumerProxy.receive(AtomikosJmsMessageConsumerProxy.java:73)
at com.atomikos.jms.AtomikosJmsMessageConsumerProxy.receive(AtomikosJmsMessageConsumerProxy.java:137)
...
at java.lang.Thread.run(Thread.java:619)
Caused by: com.atomikos.jms.AtomikosTransactionRequiredJMSException: The JMS session you are using requires a JTA transaction context for the calling thread and none was found.
Please correct your code to do one of the following:
1. start a JTA transaction if you want your JMS operations to be subject to JTA commit/rollback, or
2. increase the maxPoolSize of the AtomikosConnectionFactoryBean to avoid transaction timeout while waiting for a connection, or
3. create a non-transacted session and do session acknowledgment yourself, or
4. set localTransactionMode to true so connection-level commit/rollback are enabled.
at com.atomikos.jms.AtomikosTransactionRequiredJMSException.throwAtomikosTransactionRequiredJMSException(AtomikosTransactionRequiredJMSException.java:38)
at com.atomikos.jms.ConsumerProducerSupport.enlist(ConsumerProducerSupport.java:107)
at com.atomikos.jms.AtomikosJmsMessageConsumerProxy.receive(AtomikosJmsMessageConsumerProxy.java:70)
... 5 more
最佳答案
Tomcat 使用 multiple class-loaders .参见 their definitions ,它是如何工作的,哪个优先(bootstrap,system,webapp,common)。我假设您将 geronimo-jta_1.0.1B_spec-1.0.jar
和/或 transactions-jta-3.7.1.jar
放在 WAR 文件 webapp 中。 war/WEB-INF/lib/
除了 $TOMCAT_HOME/lib/
。这可能会导致问题,因为 javax.transaction.TransactionManager
类将被不同的类加载器加载多次。即使该类具有相同的名称,如果它由不同的类加载器加载,转换也会失败。
当 Tomcat 初始化定义在
context.xml
由com.atomikos.icatch.jta.UserTransactionManager
实现。 (此时 Tomcat 不使用任何 webapp 类加载器。)您在您的网络应用程序中使用了
javax.transaction.TransactionManager
类,现在它将使用 webapp 类加载器从JAR 文件位于 WAR 文件内的webapp.war/WEB-INF/lib/
文件夹中。
尝试从 webapp.war/WEB-INF/lib/
中删除包含 javax.transaction.TransactionManager
类的 JAR 文件,然后尝试重新部署您的应用程序。
或者,在 CLASSPATH
系统变量中列出这些 JAR 文件,这样这些类将由在 Tomcat 中具有优先权的系统类加载器加载。
关于tomcat - Atomikos、Tomcat、JTA java.lang.ClassCastException,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/17245643/