1|1简介
最近基于最新的Activiti7配置了SpringBoot2。
简单上手使用了一番。发现市面上解决Activiti7的教程很少，采坑也比较多，在Activiti6配置数据源和Activiti7有所区别，基于Activiti6在Activiti7里是无法正常使用的。接下来让我们看下区别。
1|2问题
Activiti6多数据源配置
6的配置比较简单点。
先加入配置：
# activiti 数据源spring.datasource.activiti.driver=com.mysql.jdbc.Driverspring.datasource.activiti.url=jdbc:mysql://10.1.1.97:3311/test-activiti7-db?useUnicode=true&characterEncoding=utf8&useSSL=false&allowMultiQueries=truespring.datasource.activiti.username=rootspring.datasource.activiti.password=Rtqw123OpnmERspring.datasource.activiti.driverClassName=com.mysql.jdbc.Driver
用@ConfigurationProperties加载以spring.datasource.activiti开头的DataSource。 创建ActivitiConfig继承AbstractProcessEngineAutoConfiguration方法注入SpringProcessEngineConfigurationbean,调用AbstractProcessEngineAutoConfiguration#baseSpringProcessEngineConfiguration方法把创建的数据源注入。
@Configurationpublic class ActivitiConfig extends AbstractProcessEngineAutoConfiguration { @Bean @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); }}
Activiti6的数据源已经配置完成，如果是7的话会发现
AbstractProcessEngineAutoConfiguration#baseSpringProcessEngineConfiguration方法已经不存在了，我们需要产考源码构建方式改造一番。
1|3修复
Activiti7多数据源配置
配置还是要上面的。
创建ActivitiConfig继承AbstractProcessEngineAutoConfiguration方法注入SpringProcessEngineConfigurationbean。 用@ConfigurationProperties加载以spring.datasource.activiti开头的DataSource
@Configurationpublic class ActivitiConfig extends AbstractProcessEngineAutoConfiguration { @Bean @ConfigurationProperties(prefix = "spring.datasource.activiti") public DataSource activitiDataSource() { return DataSourceBuilder.create().build(); } ...略}SpringProcessEngineConfiguration注入方式改为下面： @Bean @Primary public SpringProcessEngineConfiguration springProcessEngineConfiguration( PlatformTransactionManager transactionManager, SpringAsyncExecutor springAsyncExecutor, ActivitiProperties activitiProperties, ProcessDefinitionResourceFinder processDefinitionResourceFinder, @Autowired(required = false) DefaultActivityBehaviorFactoryMappingConfigurer processEngineConfigurationConfigurer, @Autowired(required = false) List<ProcessEngineConfigurator> processEngineConfigurators, UserGroupManager userGroupManager, DataSource dataSource) throws IOException { SpringProcessEngineConfiguration conf = new SpringProcessEngineConfiguration(); conf.setConfigurators(processEngineConfigurators); configureProcessDefinitionResources(processDefinitionResourceFinder, conf); conf.setDataSource(dataSource); conf.setTransactionManager(transactionManager); if (springAsyncExecutor != null) { conf.setAsyncExecutor(springAsyncExecutor); } conf.setDeploymentName(activitiProperties.getDeploymentName()); conf.setDatabaseSchema(activitiProperties.getDatabaseSchema()); conf.setDatabaseSchemaUpdate(activitiProperties.getDatabaseSchemaUpdate()); conf.setDbHistoryUsed(activitiProperties.isDbHistoryUsed()); conf.setAsyncExecutorActivate(activitiProperties.isAsyncExecutorActivate()); if (!activitiProperties.isAsyncExecutorActivate()) { ValidatorSet springBootStarterValidatorSet = new ValidatorSet("activiti-spring-boot-starter"); springBootStarterValidatorSet.addValidator(new AsyncPropertyValidator()); if (conf.getProcessValidator() == null) { ProcessValidatorImpl processValidator = new ProcessValidatorImpl(); processValidator.addValidatorSet(springBootStarterValidatorSet); conf.setProcessValidator(processValidator); } else { conf.getProcessValidator().getValidatorSets().add(springBootStarterValidatorSet); } } conf.setMailServerHost(activitiProperties.getMailServerHost()); conf.setMailServerPort(activitiProperties.getMailServerPort()); conf.setMailServerUsername(activitiProperties.getMailServerUserName()); conf.setMailServerPassword(activitiProperties.getMailServerPassword()); conf.setMailServerDefaultFrom(activitiProperties.getMailServerDefaultFrom()); conf.setMailServerUseSSL(activitiProperties.isMailServerUseSsl()); conf.setMailServerUseTLS(activitiProperties.isMailServerUseTls()); if (userGroupManager != null) { conf.setUserGroupManager(userGroupManager); } conf.setHistoryLevel(activitiProperties.getHistoryLevel()); conf.setCopyVariablesToLocalForTasks(activitiProperties.isCopyVariablesToLocalForTasks()); conf.setSerializePOJOsInVariablesToJson(activitiProperties.isSerializePOJOsInVariablesToJson()); conf.setJavaClassFieldForJackson(activitiProperties.getJavaClassFieldForJackson()); if (activitiProperties.getCustomMybatisMappers() != null) { conf.setCustomMybatisMappers( getCustomMybatisMapperClasses(activitiProperties.getCustomMybatisMappers())); } if (activitiProperties.getCustomMybatisXMLMappers() != null) { conf.setCustomMybatisXMLMappers( new HashSet<>(activitiProperties.getCustomMybatisXMLMappers())); } if (activitiProperties.getCustomMybatisXMLMappers() != null) { conf.setCustomMybatisXMLMappers( new HashSet<>(activitiProperties.getCustomMybatisXMLMappers())); } if (activitiProperties.isUseStrongUuids()) { conf.setIdGenerator(new StrongUuidGenerator()); } if (activitiProperties.getDeploymentMode() != null) { conf.setDeploymentMode(activitiProperties.getDeploymentMode()); } conf.setActivityBehaviorFactory(new DefaultActivityBehaviorFactory()); if (processEngineConfigurationConfigurer != null) { processEngineConfigurationConfigurer.configure(conf); } return conf; } private void configureProcessDefinitionResources( ProcessDefinitionResourceFinder processDefinitionResourceFinder, SpringProcessEngineConfiguration conf) throws IOException { List<Resource> procDefResources = processDefinitionResourceFinder .discoverProcessDefinitionResources(); if (!procDefResources.isEmpty()) { conf.setDeploymentResources(procDefResources.toArray(new Resource[0])); } }
1|4常见错误
在以上配置中可能会有jdbcUrl is required with driverClassName错误
解决办法如下:
# activiti 数据源spring.datasource.activiti.driver=com.mysql.jdbc.Driverspring.datasource.activiti.url=jdbc:mysql://10.1.1.97:3311/test-activiti7-db?useUnicode=true&characterEncoding=utf8&useSSL=false&allowMultiQueries=true# url换为jdbc-url 解决jdbcUrl is required with driverClassName错误# 官方文档的解释是：# 因为连接池的实际类型没有被公开，所以在您的自定义数据源的元数据中没有生成密钥，而且在IDE中没有完成(因为DataSource接口没有暴露属性)。# 另外，如果您碰巧在类路径上有Hikari，那么这个基本设置就不起作用了，因为Hikari没有url属性(但是确实有一个jdbcUrl属性)。在这种情况下，您必须重写您的配置如下:spring.datasource.activiti.jdbc-url=${spring.datasource.activiti.url}spring.datasource.activiti.username=rootspring.datasource.activiti.password=Rtqw123OpnmERspring.datasource.activiti.driverClassName=com.mysql.jdbc.Driver
1|5总结
Activiti7国内的教程不是很多，需要自己在社区里或者官方文档，源码去看了解，细心学习。
示例代码地址:activiti-starter
总结
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本文标题: 解决Springboot2.1.x配置Activiti7单独数据源问题
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