Project Parameter Not Found when Creating Google Cloud Bucket (Java API)

Question

I am attempting to create a google cloud bucket using the below function:

  def createBucket(bucketName: String, credentials: String): Bucket = {

    val credentialStream = new ByteArrayInputStream(
      credentials.getBytes(StandardCharsets.UTF_8.name()))
    val storage = StorageOptions.newBuilder
      .setCredentials(ServiceAccountCredentials.fromStream(credentialStream))
      .build()
      .getService()
    storage.create(BucketInfo.newBuilder(bucketName).build())
  }

The credential stream I am reading in is a standard google cloud credentials JSON and contains the project ID. However, I am receiving an error java.lang.NullPointerException: Required parameter project must be specified as shown below:

play.api.UnexpectedException: Unexpected exception[StorageException: java.lang.NullPointerException: Required parameter project must be specified.]
        at play.api.http.HttpErrorHandlerExceptions$.throwableToUsefulException(HttpErrorHandler.scala:276)
        at play.api.http.DefaultHttpErrorHandler.onServerError(HttpErrorHandler.scala:206)
        at play.api.GlobalSettings$class.onError(GlobalSettings.scala:160)
        at play.api.DefaultGlobal$.onError(GlobalSettings.scala:188)
        at play.api.http.GlobalSettingsHttpErrorHandler.onServerError(HttpErrorHandler.scala:98)
        at play.core.server.netty.PlayRequestHandler$$anonfun$2$$anonfun$apply$1.applyOrElse(PlayRequestHandler.scala:100)
        at play.core.server.netty.PlayRequestHandler$$anonfun$2$$anonfun$apply$1.applyOrElse(PlayRequestHandler.scala:99)
        at scala.concurrent.Future$$anonfun$recoverWith$1.apply(Future.scala:346)
        at scala.concurrent.Future$$anonfun$recoverWith$1.apply(Future.scala:345)
        at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:32)
Caused by: com.google.cloud.storage.StorageException: java.lang.NullPointerException: Required parameter project must be specified.
        at com.google.cloud.storage.StorageException.translateAndThrow(StorageException.java:71)
        at com.google.cloud.storage.StorageImpl.create(StorageImpl.java:114)
        at models.services.CloudServiceImpl.createBucket(CloudServiceImpl.scala:728)

Any idea why this might be? I was attempting to follow the API guide outlined here: https://cloud.google.com/storage/docs/creating-buckets#storage-create-bucket-java

mongolol mongolol · Accepted Answer · 2017-09-20T17:07:19

So, it turns out that creating a storage object from a credentials JSON does not assign it to the project referenced by the JSON. It must be manually set:

val storage = StorageOptions.newBuilder
  .setCredentials(ServiceAccountCredentials.fromStream(credentialStream))
  .setProjectId(projectId)
  .build
  .getService

Project Parameter Not Found when Creating Google Cloud Bucket (Java API)

2 Answers