带惰性加载异常的Wildfly和Mybatis

Question

我遇到的问题类似于以下情况：Jboss Wildfly EJB3和Mybatis部署错误：NoSuchMethodError javax.persistence.table.indexes（）[ljavax/persistence/index；但这并没有阻止我部署EAR，我的问题发生在尝试执行DAO中的一个方法时，该方法使用Mybatis映射器，并对另一个映射器进行惰性加载引用。我得到以下异常:

java.lang.IllegalStateException: Cannot enable lazy loading because CGLIB is not available. Add CGLIB to your classpath.
    at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:26) [mybatis.jar:3.2.8]
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:111) [mybatis.jar:3.2.8]
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:102) [mybatis.jar:3.2.8]
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:98) [mybatis.jar:3.2.8]
    at coza.healthbridge.sharedservices.dao.AbstractDAO.getAll(AbstractDAO.java:141) [shared-services-ejb.jar:]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.8.0_20]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) [rt.jar:1.8.0_20]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.8.0_20]
    at java.lang.reflect.Method.invoke(Method.java:483) [rt.jar:1.8.0_20]
    at org.jboss.as.ee.component.ManagedReferenceMethodInterceptor.processInvocation(ManagedReferenceMethodInterceptor.java:52)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
    at org.jboss.invocation.WeavedInterceptor.processInvocation(WeavedInterceptor.java:53)
    at org.jboss.as.ee.component.interceptors.UserInterceptorFactory$1.processInvocation(UserInterceptorFactory.java:63)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
    at org.jboss.invocation.InterceptorContext$Invocation.proceed(InterceptorContext.java:407)
    at org.jboss.as.weld.ejb.Jsr299BindingsInterceptor.doMethodInterception(Jsr299BindingsInterceptor.java:82) [wildfly-weld-8.1.0.Final.jar:8.1.0.Final]
    at org.jboss.as.weld.ejb.Jsr299BindingsInterceptor.processInvocation(Jsr299BindingsInterceptor.java:93) [wildfly-weld-8.1.0.Final.jar:8.1.0.Final]
    at org.jboss.as.ee.component.interceptors.UserInterceptorFactory$1.processInvocation(UserInterceptorFactory.java:63)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
    at org.jboss.invocation.WeavedInterceptor.processInvocation(WeavedInterceptor.java:53)
    at org.jboss.as.ee.component.interceptors.UserInterceptorFactory$1.processInvocation(UserInterceptorFactory.java:63)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
    at org.jboss.as.ejb3.component.invocationmetrics.ExecutionTimeInterceptor.processInvocation(ExecutionTimeInterceptor.java:43) [wildfly-ejb3-8.1.0.Final.jar:8.1.0.Final]
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
    at org.jboss.as.jpa.interceptor.SBInvocationInterceptor.processInvocation(SBInvocationInterceptor.java:47)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
    at org.jboss.invocation.InterceptorContext$Invocation.proceed(InterceptorContext.java:407)
    at org.jboss.weld.ejb.AbstractEJBRequestScopeActivationInterceptor.aroundInvoke(AbstractEJBRequestScopeActivationInterceptor.java:46) [weld-core-impl-2.1.2.Final.jar:2014-01-09 09:23]
    at org.jboss.as.weld.ejb.EjbRequestScopeActivationInterceptor.processInvocation(EjbRequestScopeActivationInterceptor.java:83) [wildfly-weld-8.1.0.Final.jar:8.1.0.Final]
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
    at org.jboss.as.ee.concurrent.ConcurrentContextInterceptor.processInvocation(ConcurrentContextInterceptor.java:45) [wildfly-ee-8.1.0.Final.jar:8.1.0.Final]
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
    at org.jboss.invocation.InitialInterceptor.processInvocation(InitialInterceptor.java:21)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
    at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61)
    at org.jboss.as.ee.component.interceptors.ComponentDispatcherInterceptor.processInvocation(ComponentDispatcherInterceptor.java:53)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
    at org.jboss.as.ejb3.component.interceptors.NonPooledEJBComponentInstanceAssociatingInterceptor.processInvocation(NonPooledEJBComponentInstanceAssociatingInterceptor.java:59) [wildfly-ejb3-8.1.0.Final.jar:8.1.0.Final]
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
    at org.jboss.as.ejb3.tx.CMTTxInterceptor.invokeInCallerTx(CMTTxInterceptor.java:251) [wildfly-ejb3-8.1.0.Final.jar:8.1.0.Final]
    ... 215 more
Caused by: java.lang.IllegalStateException: Cannot enable lazy loading because CGLIB is not available. Add CGLIB to your classpath.
    at org.apache.ibatis.executor.loader.cglib.CglibProxyFactory.<init>(CglibProxyFactory.java:56) [mybatis.jar:3.2.8]
    at org.apache.ibatis.session.Configuration.getProxyFactory(Configuration.java:300) [mybatis.jar:3.2.8]
    at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.createResultObject(DefaultResultSetHandler.java:523) [mybatis.jar:3.2.8]
    at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.getRowValue(DefaultResultSetHandler.java:334) [mybatis.jar:3.2.8]
    at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleRowValuesForSimpleResultMap(DefaultResultSetHandler.java:294) [mybatis.jar:3.2.8]
    at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleRowValues(DefaultResultSetHandler.java:269) [mybatis.jar:3.2.8]
    at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleResultSet(DefaultResultSetHandler.java:239) [mybatis.jar:3.2.8]
    at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleResultSets(DefaultResultSetHandler.java:153) [mybatis.jar:3.2.8]
    at org.apache.ibatis.executor.statement.PreparedStatementHandler.query(PreparedStatementHandler.java:60) [mybatis.jar:3.2.8]
    at org.apache.ibatis.executor.statement.RoutingStatementHandler.query(RoutingStatementHandler.java:73) [mybatis.jar:3.2.8]
    at org.apache.ibatis.executor.BatchExecutor.doQuery(BatchExecutor.java:87) [mybatis.jar:3.2.8]
    at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:267) [mybatis.jar:3.2.8]
    at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:137) [mybatis.jar:3.2.8]
    at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:96) [mybatis.jar:3.2.8]
    at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:77) [mybatis.jar:3.2.8]
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:108) [mybatis.jar:3.2.8]
    ... 253 more
Caused by: java.lang.NoClassDefFoundError: org/objectweb/asm/Type
    at net.sf.cglib.core.TypeUtils.parseType(TypeUtils.java:184) [cglib.jar:]
    at net.sf.cglib.core.KeyFactory.<clinit>(KeyFactory.java:66) [cglib.jar:]
    at net.sf.cglib.proxy.Enhancer.<clinit>(Enhancer.java:69) [cglib.jar:]
    at java.lang.Class.forName0(Native Method) [rt.jar:1.8.0_20]
    at java.lang.Class.forName(Class.java:340) [rt.jar:1.8.0_20]
    at org.apache.ibatis.io.ClassLoaderWrapper.classForName(ClassLoaderWrapper.java:178) [mybatis.jar:3.2.8]
    at org.apache.ibatis.io.ClassLoaderWrapper.classForName(ClassLoaderWrapper.java:89) [mybatis.jar:3.2.8]
    at org.apache.ibatis.io.Resources.classForName(Resources.java:256) [mybatis.jar:3.2.8]
    at org.apache.ibatis.executor.loader.cglib.CglibProxyFactory.<init>(CglibProxyFactory.java:54) [mybatis.jar:3.2.8]
    ... 268 more

我的pom.xml具有以下依赖项:

<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis</artifactId>
    <scope>compile</scope>
</dependency>
<!-- Proxy support (Mandatory) -->
<dependency>
    <groupId>cglib</groupId>
    <artifactId>cglib</artifactId>
    <scope>compile</scope>
    <exclusions>
        <exclusion>
            <groupId>asm</groupId>
            <artifactId>asm</artifactId>
        </exclusion>
    </exclusions>
</dependency>
<!-- Internal dependency (Required) -->
<dependency>
    <groupId>org.ow2.asm</groupId>
    <artifactId>asm-util</artifactId>
    <scope>compile</scope>
    <exclusions>
        <exclusion>
            <groupId>org.ow2.asm</groupId>
            <artifactId>asm</artifactId>
        </exclusion>
    </exclusions>
</dependency>
<!-- Internal dependency (Required) -->
<dependency>
    <groupId>opensymphony</groupId>
    <artifactId>oscache</artifactId>
    <scope>compile</scope>
    <!-- This excludes the transitive dependency on JMS -->
    <exclusions>
        <exclusion>
            <groupId>javax.jms</groupId>
            <artifactId>jms</artifactId>
        </exclusion>
    </exclusions>
</dependency>

这真的很棘手，因为在JBoss7中使用完全相同的EAR时，该方法有效。我还知道，在为asm内置的jboss基础系统中有一个模块（module xmlns=“urn:jboss:module:1.3”name=“asm.asm”）。如果我将asm.jar添加回我的EAR中，我会从上面提到的帖子中得到部署错误，因为asm模块是由jboss本身加载的。由于应用程序在JBoss7中工作，我知道我的mybatis-config.xml、映射器和实体POJO都很好。我猜这是某种JBoss Wildfly classloading特定的问题。

Answer 1

这是我自己的解决方案，因为我找不到任何地方的答案，我的问题。
在研究了JBoss Wildfly类加载的工作原理后，我发现了全局模块的概念https://docs.JBoss.org/author/display/wfly8/Class+Loading+in+Wildfly（滚动到全局模块标题）。

在对standalone.xml进行了一些调整和摆弄之后，我找到了解决方案。

您必须搜索java ee子系统（无论版本为urn:jboss:domain:ee:2.0还是urn:jboss:domain:ee:1.0)，并为asm.asm模块添加global-modules标记，如下所示：

<global-modules>
    <module name="asm.asm" slot="main" />
</global-modules>

用asm.asm模块作为全局模块重新启动jboss后，应用程序的功能与JBoss7中的功能相同。