scala - 使用可注入参数创建类

Question

考虑以下类：

class MongoDumpBuilder (recordingId: String, parquetService: ParquetService) {
...
}

我想注入parquetService，问题是我想创建MongoDumpBuilder如下：

注意：我想传递recordingId.stringify给班级

new MongoDumpBuilder(recordingId.stringify)
        .withPacificEvents(pacificEvents)
        .withAssets(assets)
        .withTransactions(transactions)
        .withReports(reports)
        .withExpenses(expenses)
        .build()

但这仅适用于：

new MongoDumpBuilder(recordingId.stringify, parquetService)

如果我愿意MongoDumpBuilder，Inject我将无法创建它

class MongoDumpBuilder @Inject()(recordingId: String, parquetService: ParquetService) {
???
}

任何想法如何解决它？

标签： scalaplayframeworkguice

Answer 1

您可以使用命名来绑定recordingId. 将此添加到您的Module：

bind(classOf[String]).annotatedWith(Names.named("recordingId")).toInstance(recordingId.stringify)

然后定义你的类：

class MongoDumpBuilder @Inject()(@Named("recordingId") val recordingId: String, parquetService: ParquetService) {
...
}