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Date: Sat, 6 Oct 2012 19:17:12 -0700 (PDT)
From: Rahul Jaiswal <jaiswal.ra...@gmail.com>
To: mongodb-user@googlegroups.com
Message-Id: <8e62ebdd-b331-412e-a83a-d5de0f5c6933@googlegroups.com>
Subject: Spring GridFsOperations (Java) API for storing in mongo with a
 custom prefix
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I am using GridFsOperations API of spring-data for mongodb to store large 
files in chunks in the db. Here is my code:

@Autowired
private GridFsOperations gridOperation;

public String save(InputStream inputStream, String contentType, String filename) {
  ...
  GridFSFile file = gridOperation.store(inputStream, filename, metaData);
  return file.getId().toString();
}

The code works fine but it always stores files in collections starting with 
prefix "fs", which is the default in mongodb. Is there a way to specify a 
different prefix so that I can have different files and chunks for 
different kinds of files to be stored?

EDIT: additional question

How do I specify the chunk size? Is it advisable to have different chunk 
sizes for different kinds of files, for example, 1 mb for image files and 
10 mb for video files?

Thanks in advance

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<p style=3D"font-size: 14px; clear: both; word-wrap: break-word; color: rgb=
(0, 0, 0); font-family: Arial, 'Liberation Sans', 'DejaVu Sans', sans-serif=
; ">I am using GridFsOperations API of spring-data for mongodb to store lar=
ge files in chunks in the db. Here is my code:</p><pre style=3D"margin-bott=
om: 10px; padding: 5px; font-size: 14px; background-color: rgb(238, 238, 23=
8); font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mon=
o', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospac=
e, serif; overflow: auto; width: auto; max-height: 600px; color: rgb(0, 0, =
0); line-height: 18px; "><code style=3D"font-family: Consolas, Menlo, Monac=
o, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera=
 Sans Mono', 'Courier New', monospace, serif; ">@Autowired
private GridFsOperations gridOperation;

public String save(InputStream inputStream, String contentType, String file=
name) {
  ...
  GridFSFile file =3D gridOperation.store(inputStream, filename, metaData);
  return file.getId().toString();
}
</code></pre><p style=3D"font-size: 14px; clear: both; word-wrap: break-wor=
d; color: rgb(0, 0, 0); font-family: Arial, 'Liberation Sans', 'DejaVu Sans=
', sans-serif; ">The code works fine but it always stores files in collecti=
ons starting with prefix "fs", which is the default in mongodb. Is there a =
way to specify a different prefix so that I can have different files and ch=
unks for different kinds of files to be stored?</p><p style=3D"font-size: 1=
4px; clear: both; word-wrap: break-word; color: rgb(0, 0, 0); font-family: =
Arial, 'Liberation Sans', 'DejaVu Sans', sans-serif; ">EDIT: additional que=
stion</p><p style=3D"font-size: 14px; clear: both; word-wrap: break-word; c=
olor: rgb(0, 0, 0); font-family: Arial, 'Liberation Sans', 'DejaVu Sans', s=
ans-serif; ">How do I specify the chunk size? Is it advisable to have diffe=
rent chunk sizes for different kinds of files, for example, 1 mb for image =
files and 10 mb for video files?</p><p style=3D"font-size: 14px; clear: bot=
h; word-wrap: break-word; color: rgb(0, 0, 0); font-family: Arial, 'Liberat=
ion Sans', 'DejaVu Sans', sans-serif; ">Thanks in advance</p>
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