AutoConfigure

自动配置的内容

自动配置的 Serializer 是 ：

@Bean
@ConditionalOnMissingBean
public Serializer serializer() {
    XStreamSerializer xStreamSerializer = new XStreamSerializer();
    xStreamSerializer.getXStream().setClassLoader(beanClassLoader);
    return xStreamSerializer;

自动配置的 EventBus 是 SimpleEventBus：

@Bean
@ConditionalOnMissingBean({EventStorageEngine.class, EventBus.class, EventStore.class})
public EventBus eventBus(AxonConfiguration configuration) {
    return new SimpleEventBus(Integer.MAX_VALUE, configuration.messageMonitor(EventStore.class, "eventStore"));

自动配置 TransactionManager 时，先看有没有 PlatformTransactionManager，如果有则配置为 SpringTransactionManager，如果没有，则取默认配置，结果为 NoTransactionManager:

@AutoConfigureAfter(TransactionConfiguration.class)
@Configuration
public static class DefaultTransactionConfiguration {
    @Bean
    @ConditionalOnMissingBean(TransactionManager.class)
    public TransactionManager axonTransactionManager() {
        return NoTransactionManager.INSTANCE;
}
@Configuration
@ConditionalOnClass(PlatformTransactionManager.class)
@AutoConfigureAfter(name = "org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration")
public static class TransactionConfiguration {
    @Bean
    @ConditionalOnMissingBean
    @ConditionalOnBean(PlatformTransactionManager.class)
    public TransactionManager axonTransactionManager(PlatformTransactionManager transactionManager) {
        return new SpringTransactionManager(transactionManager);