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我正在使用AWS开发工具包for Java在AWS计量服务中使用。当我试图用AWSMarketplaceMeteringClientBuilder
创建AWSMarketplaceMeteringClient
,我发现,如果我用withRegion(Region region)
方法,我得到以下编译时错误:AWSMarketplaceMeteringClientBuilder.withRegion()不可见
The method withRegion(Region) from the type AwsClientBuilder<AWSMarketplaceMeteringClientBuilder,AWSMarketplaceMetering> is not visible
如下图所示的客户端代码:
AWSMarketplaceMeteringClient metClient = (AWSMarketplaceMeteringClient) AWSMarketplaceMeteringClientBuilder
.standard()
.withRegion(Regions.getCurrentRegion())
.withCredentials(InstanceProfileCredentialsProvider.getInstance())
.build();
而且当我尝试使用AWSMarketplaceMeteringClient
直接setRegion(Region region)
方法,我得到以下运行时错误:
Exception in thread "main" java.lang.UnsupportedOperationException: Client is immutable when created with the builder.
at com.amazonaws.AmazonWebServiceClient.checkMutability(AmazonWebServiceClient.java:854)
at com.amazonaws.AmazonWebServiceClient.setRegion(AmazonWebServiceClient.java:349)
那么应该如何使用withRegion(Region region)方法?