Java.io.FileOutputStream in Google App Engine

Question

Why "FileOutputStream" is a restricted class in Google App Engine? Is there any other way to use the "FileOutputStream" in Google App Engine?

Ian Marshall · Accepted Answer · 2013-11-22 13:59:36Z

1

java.io.FileOutputStream is a restricted class in Google App Engine for Java because GAE/J apps are not allowed to write data to their local file systems. Therefore, GAE/J apps cannot use this class directly.

By connecting or communicating with applications outside of GAE, writing to a file system (and thus using java.io.FileOutputStream indirectly) may be possible.

GAE/J apps can store persistent data within the Google Cloud environment in ways other than by writing to a local file system.

answered Nov 22, 2013 at 13:59

Ian Marshall

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