org.activiti.engine.impl.cfg
接口 
BpmnParseFactory
IdGenerator
ProcessEngineConfigurator
ServiceInvoker
TransactionContext
TransactionContextFactory
TransactionListener
 
BeansConfigurationHelper
CommandExecutorImpl
DefaultBpmnParseFactory
JpaHelper
JtaProcessEngineConfiguration
MailServerInfo
ProcessEngineConfigurationImpl
SpringBeanFactoryProxyMap
StandaloneInMemProcessEngineConfiguration
StandaloneProcessEngineConfiguration
枚举 
TransactionPropagation
TransactionState