##新增配置

@Configurationpublic class ActivitiDatasourceConfig extends AbstractProcessEngineAutoConfiguration {    @Bean    @Primary    @ConfigurationProperties(prefix = "spring.datasource.activiti")    public DataSource activitiDataSource() {        return DataSourceBuilder.create().build();    }    @Bean    public SpringProcessEngineConfiguration springProcessEngineConfiguration(            PlatformTransactionManager transactionManager,            SpringAsyncExecutor springAsyncExecutor) throws IOException {        return baseSpringProcessEngineConfiguration(                activitiDataSource(),                transactionManager,                springAsyncExecutor);    }}

##primary注解 表示该数据源为主要的默认数据源，其他数据源需要自己额外指定事务管理器。

##docs