awscala.CredentialsLoader.scala Maven / Gradle / Ivy

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package awscala

import com.amazonaws.auth._
import com.amazonaws.AmazonClientException

/**
 * AWS Credentials loader.
 */
object CredentialsLoader {

  def load(): Credentials = {
    tryCredentials(new DefaultAWSCredentialsProviderChain)
      .getOrElse { throw new IllegalStateException(s"Failed to load AWS credentials! Make sure about environment or configuration.") }
  }

  private[this] def asScala(c: AWSCredentials): Credentials = c match {
    case sc: AWSSessionCredentials => Credentials(sc.getAWSAccessKeyId, sc.getAWSSecretKey, sc.getSessionToken)
    case _ => Credentials(c.getAWSAccessKeyId, c.getAWSSecretKey)
  }

  private[this] def tryCredentials(provider: AWSCredentialsProvider): Option[Credentials] = {
    try Option(asScala(provider.getCredentials))
    catch {
      case e: AmazonClientException => None
    }
  }

}