解决mybatis+springboot+flowable6.4.0遇到的问题
作者：ToBeYourBaBa
文章主要介绍了MyBatis和Flowable在Spring Boot项目中的冲突问题,以及如何通过排除Flowable的SQLSession注入、增加Flowable属性配置和处理数据库表错误来解决这个问题
问题
org.apache.ibatis.binding.BindingException: Invalid bound statement (not found)
写错对应关系 namespace等骚操作造成的就不说了。动动脑子。下面主要说冲突导致的这个问题。
源码查看
1 报错位置
MappedStatement ms = resolveMappedStatement(mapperInterface, methodName, declaringClass,
configuration);
if (ms == null) {
if (method.getAnnotation(Flush.class) != null) {
name = null;
type = SqlCommandType.FLUSH;
} else {
throw new BindingException("Invalid bound statement (not found): "
+ mapperInterface.getName() + "." + methodName);
}
...
2 ms为啥为空 因为 mappedStatements里没有(MapperLocations配置没生效)
private MappedStatement resolveMappedStatement(Class<?> mapperInterface, String methodName,
Class<?> declaringClass, Configuration configuration) {
String statementId = mapperInterface.getName() + "." + methodName;
if (configuration.hasStatement(statementId)) {
return configuration.getMappedStatement(statementId);
} else if (mapperInterface.equals(declaringClass)) {
return null;
}
public boolean hasStatement(String statementName) {
return hasStatement(statementName, true);
}
public boolean hasStatement(String statementName, boolean validateIncompleteStatements) {
if (validateIncompleteStatements) {
buildAllStatements();
}
return mappedStatements.containsKey(statementName);
}
3 真正原因！ @ConditionalOnMissingBean ！！！！：如果容器中没有,就注入,如果有就不注入.mybatis的sqlsession被flowable的覆盖了
mybatis的：org.mybatis.spring.boot.autoconfigure.MybatisAutoConfiguration里
@Bean
@ConditionalOnMissingBean
public SqlSessionFactory sqlSessionFactory(DataSource dataSource) throws Exception {
...
factory.setMapperLocations(this.properties.resolveMapperLocations());
...
}
flowable的：org.flowable.ui.modeler.conf.DatabaseConfiguration里
@Bean
public SqlSessionFactory sqlSessionFactory(DataSource dataSource) {
SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
sqlSessionFactoryBean.setDataSource(dataSource);
String databaseType = this.initDatabaseType(dataSource);
if (databaseType == null) {
throw new FlowableException("couldn't deduct database type");
} else {
try {
Properties properties = new Properties();
properties.put("prefix", this.modelerAppProperties.getDataSourcePrefix());
properties.put("blobType", "BLOB");
properties.put("boolValue", "TRUE");
properties.load(this.getClass().getClassLoader().getResourceAsStream("org/flowable/db/properties/" + databaseType + ".properties"));
sqlSessionFactoryBean.setConfigurationProperties(properties);
sqlSessionFactoryBean.setMapperLocations(ResourcePatternUtils.getResourcePatternResolver(this.resourceLoader).getResources("classpath:/META-INF/modeler-mybatis-mappings/*.xml"));
sqlSessionFactoryBean.afterPropertiesSet();
return sqlSessionFactoryBean.getObject();
} catch (Exception var5) {
throw new FlowableException("Could not create sqlSessionFactory", var5);
}
}
}
4 很明显，mybatis的配置被覆盖了。吐槽一下flowable-ui的源码！
解决办法
就是兼顾 flowable和mybatis的配置
1 第一步 排除flowable的sqlsession注入：
在@ComponentScan里加入这样的话。 @Filter(type = FilterType.ASSIGNABLE_TYPE, classes = DatabaseConfiguration.class)
2 第二步 增加flowable的属性配置等。application.properties里添加如下配置。加modeler-mybatis-mapping那个
mybatis.mapperLocations=classpath*:mapper/*/*.xml,classpath:/META-INF/modeler-mybatis-mappings/*.xml #这里就是配个空。或者配置数据库用户名 username也行,不要瞎改哈(这个是查询前缀-flowable) mybatis.configuration-properties.prefix = mybatis.configuration-properties.blobType = BLOB mybatis.configuration-properties.boolValue = TRUE
3 第三步，做到这直接启动项目可能会报 act_de_model表找不到等错误。再一个@Configuration配置里加入以下bean的注入
@Bean
public Liquibase liquibase(DataSource dataSource) {
Liquibase liquibase = null;
Liquibase var5;
try {
DatabaseConnection connection = new JdbcConnection(dataSource.getConnection());
Database database = DatabaseFactory.getInstance().findCorrectDatabaseImplementation(connection);
database.setDatabaseChangeLogTableName("ACT_DE_" + database.getDatabaseChangeLogTableName());
database.setDatabaseChangeLogLockTableName("ACT_DE_" + database.getDatabaseChangeLogLockTableName());
liquibase = new Liquibase("META-INF/liquibase/flowable-modeler-app-db-changelog.xml", new ClassLoaderResourceAccessor(), database);
liquibase.update("flowable");
var5 = liquibase;
} catch (Exception var9) {
throw new InternalServerErrorException("Error creating liquibase database", var9);
} finally {
}
return var5;
}
总结
以上为个人经验，希望能给大家一个参考，也希望大家多多支持脚本之家。