What is the difference between these packages cloud.storage and appengine.tools.cloudstorage?

Question

Can anyone explain what is the difference between these two packages com.google.cloud.storage (https://googleapis.github.io/google-cloud-java/google-cloud-clients/apidocs/com/google/cloud/storage/package-summary.html ) and com.google.appengine.tools.cloudstorage (https://cloud.google.com/appengine/docs/standard/java/googlecloudstorageclient/javadoc/com/google/appengine/tools/cloudstorage/package-summary)

Are there any differences in how they function ? Which package is used in which scenario ?

I am developing a Spring MVC application and want to upload files (>100 MB) directly to Cloud Storage and download them without any errors and without going through App Engine instances.

Answer 1

• com.google.appengine.tools.cloudstorage is the old library, only in use for apps running in App Engine Standard. It's the only library that Java 7 supports, so if your app is running on Java 7, it's the way to go. However, the Java 7 runtime has been deprecated, so, I don't recommend going this way.
• com.google.cloud.storage is the most recent, and recommended Cloud Storage client library. It should be the one that you use in your app, as it's the most recent, updated and compatible library for GCS.Java 7 doesn't support this library. Then again, you shouldn't be using Java 7.