在使用普通的身份验证凭据，我可以做的：

When using plain auth credentials I can do:

ContextBuilder.newBuilder("aws-s3").credentials(keyId, key).buildView(BlobStoreContext.class);

...访问BlobStoreContext为S3。

... to access BlobStoreContext for S3.

在本机亚马逊的Java API，我可以使用安全令牌服务（STS）承担的角色，并使用临时凭据访问S3或任何其他AWS服务。

In native Amazon java api I can use Security Token Service (STS) to assume role and use temporary credentials to access S3 or any other AWS service.

我如何做到这一点的jclouds？

How do I do this in jclouds?

推荐答案

我想它了。

这code段允许承担的角色和使用温度凭据访问S3：

This code snippet allows to assume role and use temp credentials to access S3:

STSApi api = ContextBuilder.newBuilder("sts").credentials(keyId,
        key).buildApi(STSApi.class);

AssumeRoleOptions assumeRoleOptions = new AssumeRoleOptions().durationSeconds(3600).externalId(externalId);
final UserAndSessionCredentials credentials = api.assumeRole(roleArn, sessionName, assumeRoleOptions);

Supplier<Credentials> credentialsSupplier = new Supplier<Credentials>() {
    @Override
    public Credentials get() {
        return credentials.getCredentials();
    }
};
BlobStoreContext context = ContextBuilder.newBuilder("aws-s3").credentialsSupplier(credentialsSupplier).buildView(BlobStoreContext.class);