解決Springboot2.1.x配置Activiti7單獨(dú)數(shù)據(jù)源問題

1|1簡介

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最近基于最新的Activiti7配置了SpringBoot2。

簡單上手使用了一番。發(fā)現(xiàn)市面上解決Activiti7的教程很少，采坑也比較多，在Activiti6配置數(shù)據(jù)源和Activiti7有所區(qū)別，基于Activiti6在Activiti7里是無法正常使用的。接下來讓我們看下區(qū)別。

1|2問題

Activiti6多數(shù)據(jù)源配置

6的配置比較簡單點(diǎn)。

先加入配置：

# activiti 數(shù)據(jù)源
spring.datasource.activiti.driver=com.MySQL.jdbc.Driver
spring.datasource.activiti.url=jdbc:mysql://10.1.1.97:3311/test-activiti7-db?useUnicode=true&characterEncoding=utf8&useSSL=false&allowMultiQueries=true
spring.datasource.activiti.username=root
spring.datasource.activiti.password=Rtqw123OpnmER
spring.datasource.activiti.driverClassName=com.mysql.jdbc.Driver

用@ConfigurationProperties加載以spring.datasource.activiti開頭的DataSource。
創(chuàng)建ActivitiConfig繼承AbstractProcessEngineAutoConfiguration方法注入SpringProcessEngineConfigurationbean,調(diào)用AbstractProcessEngineAutoConfiguration#baseSpringProcessEngineConfiguration方法把創(chuàng)建的數(shù)據(jù)源注入。

@Configuration
public 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的數(shù)據(jù)源已經(jīng)配置完成，如果是7的話會(huì)發(fā)現(xiàn)

AbstractProcessEngineAutoConfiguration#baseSpringProcessEngineConfiguration方法已經(jīng)不存在了，我們需要產(chǎn)考源碼構(gòu)建方式改造一番。

1|3修復(fù)

Activiti7多數(shù)據(jù)源配置

配置還是要上面的。

創(chuàng)建ActivitiConfig繼承AbstractProcessEngineAutoConfiguration方法注入SpringProcessEngineConfigurationbean。
用@ConfigurationProperties加載以spring.datasource.activiti開頭的DataSource

@Configuration
public class ActivitiConfig extends AbstractProcessEngineAutoConfiguration {
 
 @Bean
 @ConfigurationProperties(prefix = "spring.datasource.activiti")
 public DataSource activitiDataSource() {
  return DataSourceBuilder.create().build();
 }
 
 ...略
}
SpringProcessEngineConfiguration注入方式改為下面：
 @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常見錯(cuò)誤

在以上配置中可能會(huì)有jdbcUrl is required with driverClassName錯(cuò)誤

解決辦法如下:

# activiti 數(shù)據(jù)源
spring.datasource.activiti.driver=com.mysql.jdbc.Driver
spring.datasource.activiti.url=jdbc:mysql://10.1.1.97:3311/test-activiti7-db?useUnicode=true&characterEncoding=utf8&useSSL=false&allowMultiQueries=true
# url換為jdbc-url 解決jdbcUrl is required with driverClassName錯(cuò)誤
# 官方文檔的解釋是：
# 因?yàn)檫B接池的實(shí)際類型沒有被公開，所以在您的自定義數(shù)據(jù)源的元數(shù)據(jù)中沒有生成密鑰，而且在IDE中沒有完成(因?yàn)镈ataSource接口沒有暴露屬性)。
# 另外，如果您碰巧在類路徑上有Hikari，那么這個(gè)基本設(shè)置就不起作用了，因?yàn)镠ikari沒有url屬性(但是確實(shí)有一個(gè)jdbcUrl屬性)。在這種情況下，您必須重寫您的配置如下:
spring.datasource.activiti.jdbc-url=${spring.datasource.activiti.url}
spring.datasource.activiti.username=root
spring.datasource.activiti.password=Rtqw123OpnmER
spring.datasource.activiti.driverClassName=com.mysql.jdbc.Driver

1|5總結(jié)

Activiti7國內(nèi)的教程不是很多，需要自己在社區(qū)里或者官方文檔，源碼去看了解，細(xì)心學(xué)習(xí)。

示例代碼地址:activiti-starter

總結(jié)

以上所述是小編給大家介紹的解決Springboot2.1.x配置Activiti7單獨(dú)數(shù)據(jù)源問題,希望對(duì)大家有所幫助，如果大家有任何疑問請(qǐng)給我留言，小編會(huì)及時(shí)回復(fù)大家的。在此也非常感謝大家對(duì)創(chuàng)新互聯(lián)網(wǎng)站的支持！
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解決Springboot2.1.x配置Activiti7單獨(dú)數(shù)據(jù)源問題