如何在 Mongock 更新日志中注入没有接口的 bean

Question

我正在将 Spring Boot 应用程序从 2.2.2 迁移到 2.2.3。 我还将 mongock 升级到 4.1.16，因为到目前为止使用的 2.0.2 版本不再兼容。

我有这个更新日志，它在 2.0.2 中运行良好，但在 4.1.16 中不起作用：

    @ChangeSet(order = "001", id = "initDatabaseParametre", author = "xxxxx")
    public void initDatabaseParametre(ParametreManager parametreManager, ObjectMapper mapper) throws IOException 
        // someting
    }

使用 4.1.16 我有这个例外，因为 ObjectMapper 不是一个接口 (com.fasterxml.jackson.databind.ObjectMapper) ：

io.changock.migration.api.exception.ChangockException: Error in method[ChangelogInitDatabase.initDatabaseParametre] : Parameter of type [ObjectMapper] must be an interface
        at io.changock.runner.core.MigrationExecutor.processExceptionOnChangeSetExecution(MigrationExecutor.java:179)
        at io.changock.runner.core.MigrationExecutor.processSingleChangeSet(MigrationExecutor.java:97)
        at io.changock.runner.core.MigrationExecutor.lambda$processSingleChangeLog$2(MigrationExecutor.java:89)
        at io.changock.runner.core.MigrationExecutor.executeInTransactionIfStrategyOrUsualIfNot(MigrationExecutor.java:75)
        at io.changock.runner.core.MigrationExecutor.processSingleChangeLog(MigrationExecutor.java:89)
        at io.changock.runner.core.MigrationExecutor.lambda$processAllChangeLogs$1(MigrationExecutor.java:83)
        at io.changock.runner.core.MigrationExecutor.executeInTransactionIfStrategyOrUsualIfNot(MigrationExecutor.java:75)
        at io.changock.runner.core.MigrationExecutor.processAllChangeLogs(MigrationExecutor.java:83)
        at io.changock.runner.core.MigrationExecutor.lambda$executeMigration$0(MigrationExecutor.java:64)
        at com.github.cloudyrock.mongock.driver.mongodb.springdata.v3.SpringDataMongo3Driver.executeInTransaction(SpringDataMongo3Driver.java:108)
        at io.changock.runner.core.MigrationExecutor.executeInTransactionIfStrategyOrUsualIfNot(MigrationExecutor.java:73)
        at io.changock.runner.core.MigrationExecutor.executeMigration(MigrationExecutor.java:64)
        at io.changock.runner.spring.v5.core.SpringMigrationExecutor.executeMigration(SpringMigrationExecutor.java:38)
        at io.changock.runner.core.ChangockBase.execute(ChangockBase.java:44)
        at io.changock.runner.spring.v5.ChangockSpringBuilderBase$ChangockSpringApplicationRunner.run(ChangockSpringBuilderBase.java:110)
        at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:786)
        at org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:776)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:322)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1237)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226)
        at com.myproject.MyApplication.main(MyApplication.java:23)
Caused by: io.changock.migration.api.exception.ChangockException: Parameter of type [ObjectMapper] must be an interface
        at io.changock.runner.core.DependencyManagerWithContext.getDependency(DependencyManagerWithContext.java:42)
        at io.changock.runner.core.MigrationExecutor.getParameter(MigrationExecutor.java:165)
        at io.changock.runner.core.MigrationExecutor.executeChangeSetMethod(MigrationExecutor.java:155)
        at io.changock.runner.core.MigrationExecutor.executeAndLogChangeSet(MigrationExecutor.java:111)
        at io.changock.runner.spring.v5.core.SpringMigrationExecutor.executeAndLogChangeSet(SpringMigrationExecutor.java:44)
        at io.changock.runner.core.MigrationExecutor.processSingleChangeSet(MigrationExecutor.java:95)
        ... 19 common frames omitted

我的更改日志中需要 ObjectMapper，因为我的迁移过程读取 json 文件。

Answer 1

正如您在更改集方法中使用自定义 bean 部分中看到的那样，在 Mongock 的文档中，您在更改集中使用的自定义 bean 必须是接口。

这里有一些解释。

但是，您可以告诉 Mongock 您不想要那样。 侵入性较小的机制是向您的@NonLockGuarded参数添加注释@NonLockGuarded ，如本节所述。

这种方法的缺点是每次在所有更改集中使用该 bean 时都需要添加注释。 也许更方便但也更具侵入性的方法是向 bean 的类型添加相同的注释，在本例中为 ObjectMapper，如本节所述。

正如我假设它是杰克逊的 ObjectMapper，而不是所有这些，您可以将 SpringContext 作为参数并从中获取 ObjectMapper bean，但由于显而易见的原因，它并不理想（这适用于任何类型的 bean）