gae-filestore is a really simple (but powerful!) virtual file system implementation upon Google App Engine DataStore. The implementation uses the Low-level DataStore API to store files, and memcache for the faster file metadata access.

Look at a simple Java example which uses gae-filestore:

``` FileStore fileStore = FileStoreFactory.getFileStore();

DataStoreFile file = fileStore.getFile("foo/bar/test.txt", true); PrintWriter pw = new PrintWriter(new OutputStreamWriter(file.openForWrite())); pw.println("Hello World!"); pw.close();

file = fileStore.getFile("foo/bar/test.txt", false); BufferedReader br = new BufferedReader(new InputStreamReader(file.openForRead())); System.out.println(bw.readLine()); ```

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If you like the code, look at my other projects on http://code.google.com/u/TheBojda/.

If you have any question, please feel free to contact me at thebojda AT gmail DOT com.