mybatis-plus 3.3.2 部署多个pod id冲突问题
配置：
# 设置随机
mybatis-plus.global-config.worker-id: ${random.int(1,31)}
mybatis-plus.global-config.datacenter-id: ${random.int(1,31)}
源码解析：MybatisSqlSessionFactoryBean
重点：new MybatisSqlSessionFactoryBuilder().build(targetConfiguration); -->IdWorker.setIdentifierGenerator(identifierGenerator);
java
protected SqlSessionFactory buildSqlSessionFactory() throws Exception {
final MybatisConfiguration targetConfiguration;
// TODO 使用 MybatisXmlConfigBuilder 而不是 XMLConfigBuilder
MybatisXMLConfigBuilder xmlConfigBuilder = null;
if (this.configuration != null) {
targetConfiguration = this.configuration;
if (targetConfiguration.getVariables() == null) {
targetConfiguration.setVariables(this.configurationProperties);
} else if (this.configurationProperties != null) {
targetConfiguration.getVariables().putAll(this.configurationProperties);
}
} else if (this.configLocation != null) {
// TODO 使用 MybatisXMLConfigBuilder
xmlConfigBuilder = new MybatisXMLConfigBuilder(this.configLocation.getInputStream(), null, this.configurationProperties);
targetConfiguration = xmlConfigBuilder.getConfiguration();
} else {
LOGGER.debug(() -> "Property 'configuration' or 'configLocation' not specified, using default MyBatis Configuration");
// TODO 使用 MybatisConfiguration
targetConfiguration = new MybatisConfiguration();
Optional.ofNullable(this.configurationProperties).ifPresent(targetConfiguration::setVariables);
}
// TODO 无配置启动所必须的
this.globalConfig = Optional.ofNullable(this.globalConfig).orElseGet(GlobalConfigUtils::defaults);
this.globalConfig.setDbConfig(Optional.ofNullable(this.globalConfig.getDbConfig()).orElseGet(GlobalConfig.DbConfig::new));
// TODO 初始化 id-work 以及 打印骚东西
targetConfiguration.setGlobalConfig(this.globalConfig);
// TODO 自定义枚举类扫描处理
if (hasLength(this.typeEnumsPackage)) {
Set<Class<?>> classes;
if (typeEnumsPackage.contains(StringPool.STAR) && !typeEnumsPackage.contains(StringPool.COMMA)
&& !typeEnumsPackage.contains(StringPool.SEMICOLON)) {
classes = scanClasses(typeEnumsPackage, null);
if (classes.isEmpty()) {
LOGGER.warn(() -> "Can't find class in '[" + typeEnumsPackage + "]' package. Please check your configuration.");
}
} else {
classes = new HashSet<>();
String[] typeEnumsPackageArray = tokenizeToStringArray(this.typeEnumsPackage,
ConfigurableApplicationContext.CONFIG_LOCATION_DELIMITERS);
Assert.notNull(typeEnumsPackageArray, "not find typeEnumsPackage:" + typeEnumsPackage);
Stream.of(typeEnumsPackageArray).forEach(typePackage -> {
try {
Set<Class<?>> scanTypePackage = scanClasses(typePackage, null);
if (scanTypePackage.isEmpty()) {
LOGGER.warn(() -> "Can't find class in '[" + typePackage + "]' package. Please check your configuration.");
} else {
classes.addAll(scanTypePackage);
}
} catch (IOException e) {
throw new MybatisPlusException("Cannot scan class in '[" + typePackage + "]' package", e);
}
});
}
// 取得类型转换注册器
TypeHandlerRegistry typeHandlerRegistry = targetConfiguration.getTypeHandlerRegistry();
classes.stream()
.filter(Class::isEnum)
.filter(MybatisEnumTypeHandler::isMpEnums)
.forEach(cls -> typeHandlerRegistry.register(cls, MybatisEnumTypeHandler.class));
}
Optional.ofNullable(this.objectFactory).ifPresent(targetConfiguration::setObjectFactory);
Optional.ofNullable(this.objectWrapperFactory).ifPresent(targetConfiguration::setObjectWrapperFactory);
Optional.ofNullable(this.vfs).ifPresent(targetConfiguration::setVfsImpl);
if (hasLength(this.typeAliasesPackage)) {
scanClasses(this.typeAliasesPackage, this.typeAliasesSuperType).stream()
.filter(clazz -> !clazz.isAnonymousClass()).filter(clazz -> !clazz.isInterface())
.filter(clazz -> !clazz.isMemberClass()).forEach(targetConfiguration.getTypeAliasRegistry()::registerAlias);
}
if (!isEmpty(this.typeAliases)) {
Stream.of(this.typeAliases).forEach(typeAlias -> {
targetConfiguration.getTypeAliasRegistry().registerAlias(typeAlias);
LOGGER.debug(() -> "Registered type alias: '" + typeAlias + "'");
});
}
if (!isEmpty(this.plugins)) {
Stream.of(this.plugins).forEach(plugin -> {
targetConfiguration.addInterceptor(plugin);
LOGGER.debug(() -> "Registered plugin: '" + plugin + "'");
});
}
if (hasLength(this.typeHandlersPackage)) {
scanClasses(this.typeHandlersPackage, TypeHandler.class).stream().filter(clazz -> !clazz.isAnonymousClass())
.filter(clazz -> !clazz.isInterface()).filter(clazz -> !Modifier.isAbstract(clazz.getModifiers()))
.forEach(targetConfiguration.getTypeHandlerRegistry()::register);
}
if (!isEmpty(this.typeHandlers)) {
Stream.of(this.typeHandlers).forEach(typeHandler -> {
targetConfiguration.getTypeHandlerRegistry().register(typeHandler);
LOGGER.debug(() -> "Registered type handler: '" + typeHandler + "'");
});
}
if (!isEmpty(this.scriptingLanguageDrivers)) {
Stream.of(this.scriptingLanguageDrivers).forEach(languageDriver -> {
targetConfiguration.getLanguageRegistry().register(languageDriver);
LOGGER.debug(() -> "Registered scripting language driver: '" + languageDriver + "'");
});
}
Optional.ofNullable(this.defaultScriptingLanguageDriver).ifPresent(targetConfiguration::setDefaultScriptingLanguage);
if (this.databaseIdProvider != null) {// fix #64 set databaseId before parse mapper xmls
try {
targetConfiguration.setDatabaseId(this.databaseIdProvider.getDatabaseId(this.dataSource));
} catch (SQLException e) {
throw new NestedIOException("Failed getting a databaseId", e);
}
}
Optional.ofNullable(this.cache).ifPresent(targetConfiguration::addCache);
if (xmlConfigBuilder != null) {
try {
xmlConfigBuilder.parse();
LOGGER.debug(() -> "Parsed configuration file: '" + this.configLocation + "'");
} catch (Exception ex) {
throw new NestedIOException("Failed to parse config resource: " + this.configLocation, ex);
} finally {
ErrorContext.instance().reset();
}
}
targetConfiguration.setEnvironment(new Environment(MybatisSqlSessionFactoryBean.class.getSimpleName(),
this.transactionFactory == null ? new SpringManagedTransactionFactory() : this.transactionFactory,
this.dataSource));
if (this.mapperLocations != null) {
if (this.mapperLocations.length == 0) {
LOGGER.warn(() -> "Property 'mapperLocations' was specified but matching resources are not found.");
} else {
for (Resource mapperLocation : this.mapperLocations) {
if (mapperLocation == null) {
continue;
}
try {
XMLMapperBuilder xmlMapperBuilder = new XMLMapperBuilder(mapperLocation.getInputStream(),
targetConfiguration, mapperLocation.toString(), targetConfiguration.getSqlFragments());
xmlMapperBuilder.parse();
} catch (Exception e) {
throw new NestedIOException("Failed to parse mapping resource: '" + mapperLocation + "'", e);
} finally {
ErrorContext.instance().reset();
}
LOGGER.debug(() -> "Parsed mapper file: '" + mapperLocation + "'");
}
}
} else {
LOGGER.debug(() -> "Property 'mapperLocations' was not specified.");
}
final SqlSessionFactory sqlSessionFactory = new MybatisSqlSessionFactoryBuilder().build(targetConfiguration);
// TODO SqlRunner
SqlHelper.FACTORY = sqlSessionFactory;
// TODO 打印骚东西 Banner
if (globalConfig.isBanner()) {
System.out.println(" _ _ |_ _ _|_. ___ _ | _ ");
System.out.println("| | |\\/|_)(_| | |_\\ |_)||_|_\\ ");
System.out.println(" / | ");
System.out.println(" " + MybatisPlusVersion.getVersion() + " ");
}
return sqlSessionFactory;
}idworker实战
其中mybatis-plus内置的ImadcnIdentifierGenerator方法，就已经提供了对idworker框架的支持。
升级版本：v3.4.0
" + MybatisPlusVersion.getVersion() + " ");
}
return sqlSessionFactory;
}
# idworker实战
其中mybatis-plus内置的`ImadcnIdentifierGenerator`方法，就已经提供了对idworker框架的支持。
升级版本：v3.4.0
