Posted on 2009-04-08 09:10
landor 閱讀(2133)
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ibatis
用
JDBC方式基本配置都很簡單，weblogic的數(shù)據(jù)源JNDI名字是：TestDatasource
那么ibatis的SqlMapConfig.xml的配置如下
<transactionManager type="JDBC" >
<dataSource type="JNDI">
<property name="context.java.naming.factory.initial" value="weblogic.jndi.WLInitialContextFactory" />
<property name="context.java.naming.provider.url" value="t3://localhost:7001" />
<property name="DataSource" value="TestDatasource" />
</dataSource>
</transactionManager>
此時啟動weblogic服務(wù)器，進(jìn)行正常junit測試即可（這里需要把weblogic.jar加到classpath中）
然而如果用如下的配置方式
<transactionManager type="JTA" >
<property name="UserTransaction" value="javax.transaction.UserTransaction"/>
<dataSource type="JNDI">
<property name="context.java.naming.factory.initial" value="weblogic.jndi.WLInitialContextFactory" />
<property name="context.java.naming.provider.url" value="t3://localhost:7001" />
<property name="DataSource" value="TestDatasource" />
</dataSource>
</transactionManager>
也就是用JTA來做事務(wù)，那么會出現(xiàn)錯誤
java.lang.ExceptionInInitializerError
at gmt.boss.obs.account.recurringcharge.IbatisTest.setUp(IbatisTest.java:12)
at junit.framework.TestCase.runBare(TestCase.java:128)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:120)
at org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
Caused by: java.lang.RuntimeException: Error occurred. Cause: com.ibatis.common.xml.NodeletException: Error parsing XML. Cause: java.lang.RuntimeException: Error parsing XPath '/sqlMapConfig/transactionManager/end()'. Cause: com.ibatis.sqlmap.client.SqlMapException: Error initializing JtaTransactionConfig while looking up UserTransaction (javax.transaction.UserTransaction). Cause: javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file: java.naming.factory.initial
at com.ibatis.sqlmap.engine.builder.xml.SqlMapConfigParser.parse(SqlMapConfigParser.java:89)
at com.ibatis.sqlmap.client.SqlMapClientBuilder.buildSqlMapClient(SqlMapClientBuilder.java:63)
at testIbatis.IbatisInstance.<clinit>(IbatisInstance.java:27)
12 more
Caused by: com.ibatis.common.xml.NodeletException: Error parsing XML. Cause: java.lang.RuntimeException: Error parsing XPath '/sqlMapConfig/transactionManager/end()'. Cause: com.ibatis.sqlmap.client.SqlMapException: Error initializing JtaTransactionConfig while looking up UserTransaction (javax.transaction.UserTransaction). Cause: javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file: java.naming.factory.initial
at com.ibatis.common.xml.NodeletParser.parse(NodeletParser.java:53)
at com.ibatis.sqlmap.engine.builder.xml.SqlMapConfigParser.parse(SqlMapConfigParser.java:86)
14 more
Caused by: java.lang.RuntimeException: Error parsing XPath '/sqlMapConfig/transactionManager/end()'. Cause: com.ibatis.sqlmap.client.SqlMapException: Error initializing JtaTransactionConfig while looking up UserTransaction (javax.transaction.UserTransaction). Cause: javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file: java.naming.factory.initial
at com.ibatis.common.xml.NodeletParser.processNodelet(NodeletParser.java:123)
at com.ibatis.common.xml.NodeletParser.process(NodeletParser.java:105)
at com.ibatis.common.xml.NodeletParser.process(NodeletParser.java:102)
at com.ibatis.common.xml.NodeletParser.parse(NodeletParser.java:72)
at com.ibatis.common.xml.NodeletParser.parse(NodeletParser.java:51)
15 more
Caused by: com.ibatis.sqlmap.client.SqlMapException: Error initializing JtaTransactionConfig while looking up UserTransaction (javax.transaction.UserTransaction). Cause: javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file: java.naming.factory.initial
at com.ibatis.sqlmap.engine.transaction.jta.JtaTransactionConfig.initialize(JtaTransactionConfig.java:50)
at com.ibatis.sqlmap.engine.builder.xml.SqlMapConfigParser$6.process(SqlMapConfigParser.java:306)
at com.ibatis.common.xml.NodeletParser.processNodelet(NodeletParser.java:121)
19 more
我已經(jīng)在配置文件里配置了context.java.naming.factory.initial，而在這里還提示這個錯誤
關(guān)鍵看這里
Error initializing JtaTransactionConfig while looking up UserTransaction (javax.transaction.UserTransaction). Cause: javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file: java.naming.factory.initial
在jvm里加上一個參數(shù)，測試一下
-Djava.naming.factory.initial=weblogic.jndi.WLInitialContextFactory
運(yùn)行通過
這個參數(shù)在：右鍵項目--Run as --Open Run Dialog--Arguments的VM arguments中添加即可
引入ibatis幫助的一段話，如下：
警告！雖然這些看起來很簡單，但記住不要濫用全局（分布式）事務(wù)，這點(diǎn)很重要。
這樣做既有性能方面的考慮，同時也是因?yàn)槿质聞?wù)會讓應(yīng)用服務(wù)器和數(shù)據(jù)庫驅(qū)動程序的設(shè)置變得更復(fù)雜。
雖然看起來簡單，您可能還是會遇到一些困難。記住，EJB擁有更多廠商和工具支持。
對于需要分布式事務(wù)的應(yīng)用，最好還是使用Session EJB