Re: [appengine-java] Re: how to save binary data in JDO
upload image into datastore,and display on webpage here
http://www.hapeblog.com/blog.shtml?id=2002
2010/3/15 rissen risse...@gmail.com
In my app , I upload image file by Apache Commons FileUpload and save
it in datastore, then get the binary data from the datastore and
display the image in serlvet.
the detail : http://mimaiji.appspot.com/article?method=viewid=9001
On 3月2日, 下午11时37分, Valentino Hankypants f.hirs...@gmx.at wrote:
hi jake,
thanks for your replies.
in my case i have jsp-page with a form. the user should have the
possibility to select a file. i used the input type=file
name=test directive from html.
after the user selected a file, he clicks a button. by clicking this
button the binary data of the selected file should be read and saved
in a blob in the GAE storage.
afterwards i'll give the user the possibility to open the uploaded
file by clicking a link...
therefore, should i use this gaevfs or not?
up to now my major problem is, how can i get the binary data from the
form in my servlet class where i handle the form actions? i got all
other informations by HttpServletRequest.getParameter(test);
greatz and hoping for some help ;-)
flo
On 2 Mrz., 15:24, Jake jbrooko...@cast.org wrote:
You're not limited to 1MB - you're just limited to using 1MB
entities. The GAEVFS link I sent you implies that it's files can span
multiple entities. As Mrityunjay stated, though, large storage
requires payment. See the quotas for details:
http://code.google.com/appengine/docs/quotas.html
Jake
On Mar 1, 12:43 pm, Valentino Hankypants f.hirs...@gmx.at wrote:
so i only can upload binary data up to 1 MB?
any possibility to upload binary data with GBs?
greatz
On 1 Mrz., 18:36, Jake jbrooko...@cast.org wrote:
Hey,
Saving binary data to the datastore isn't too difficult - you can
just
use a Blob type and ensure that you don't break the 1MB capacity of
a
single entity. You can see my class declaration below. The hard
part is converting a file upload to a byte[] and then from a byte[]
back into what you would consider a downloadable file. That
depends, somewhat, on your implementation. For example, I use the
Wicket architecture and all I need to do is
FileUpload f = fileUploadField.getFileUpload();
BinaryFileData b = new BinaryFileData(f.getBytes());
pm.makePersistent(b);
I presume you are not using Wicket, but some other framework.
You'll
need to look into how it handles file uploads.
You may also find this interesting:
http://code.google.com/p/gaevfs/
I haven't used it, but it skips the whole byte[] thing entirely.
Jake
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class BinaryFileData implements Serializable {
private static final long serialVersionUID = 1L;
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key key;
@Persistent
private String name;
@Persistent
private String mimeType;
@Persistent(defaultFetchGroup=true)
private Blob data;
public BinaryFileData(byte[] bytes) {
this.data = new Blob(bytes);
}
public byte[] getData() {
return data.getBytes();
}
public void setData(byte[] d) {
this.data = new Blob(d);
}
}
On Mar 1, 11:25 am, Valentino Hankypants f.hirs...@gmx.at wrote:
hello together,
i started working with the app engine some days ago, and now i
want to
save some binary data (pdf, etc.) from my app (eg by clicking a
button) in the storage system.
anybody who can help me doing this? (tutorials, etc.)
greatz
flo
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[appengine-java] Re: how to save binary data in JDO
In my app , I upload image file by Apache Commons FileUpload and save
it in datastore, then get the binary data from the datastore and
display the image in serlvet.
the detail : http://mimaiji.appspot.com/article?method=viewid=9001
On 3月2日, 下午11时37分, Valentino Hankypants f.hirs...@gmx.at wrote:
hi jake,
thanks for your replies.
in my case i have jsp-page with a form. the user should have the
possibility to select a file. i used the input type=file
name=test directive from html.
after the user selected a file, he clicks a button. by clicking this
button the binary data of the selected file should be read and saved
in a blob in the GAE storage.
afterwards i'll give the user the possibility to open the uploaded
file by clicking a link...
therefore, should i use this gaevfs or not?
up to now my major problem is, how can i get the binary data from the
form in my servlet class where i handle the form actions? i got all
other informations by HttpServletRequest.getParameter(test);
greatz and hoping for some help ;-)
flo
On 2 Mrz., 15:24, Jake jbrooko...@cast.org wrote:
You're not limited to 1MB - you're just limited to using 1MB
entities. The GAEVFS link I sent you implies that it's files can span
multiple entities. As Mrityunjay stated, though, large storage
requires payment. See the quotas for
details:http://code.google.com/appengine/docs/quotas.html
Jake
On Mar 1, 12:43 pm, Valentino Hankypants f.hirs...@gmx.at wrote:
so i only can upload binary data up to 1 MB?
any possibility to upload binary data with GBs?
greatz
On 1 Mrz., 18:36, Jake jbrooko...@cast.org wrote:
Hey,
Saving binary data to the datastore isn't too difficult - you can just
use a Blob type and ensure that you don't break the 1MB capacity of a
single entity. You can see my class declaration below. The hard
part is converting a file upload to a byte[] and then from a byte[]
back into what you would consider a downloadable file. That
depends, somewhat, on your implementation. For example, I use the
Wicket architecture and all I need to do is
FileUpload f = fileUploadField.getFileUpload();
BinaryFileData b = new BinaryFileData(f.getBytes());
pm.makePersistent(b);
I presume you are not using Wicket, but some other framework. You'll
need to look into how it handles file uploads.
You may also find this interesting:http://code.google.com/p/gaevfs/
I haven't used it, but it skips the whole byte[] thing entirely.
Jake
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class BinaryFileData implements Serializable {
private static final long serialVersionUID = 1L;
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key key;
@Persistent
private String name;
@Persistent
private String mimeType;
@Persistent(defaultFetchGroup=true)
private Blob data;
public BinaryFileData(byte[] bytes) {
this.data = new Blob(bytes);
}
public byte[] getData() {
return data.getBytes();
}
public void setData(byte[] d) {
this.data = new Blob(d);
}
}
On Mar 1, 11:25 am, Valentino Hankypants f.hirs...@gmx.at wrote:
hello together,
i started working with the app engine some days ago, and now i want to
save some binary data (pdf, etc.) from my app (eg by clicking a
button) in the storage system.
anybody who can help me doing this? (tutorials, etc.)
greatz
flo
--
You received this message because you are subscribed to the Google Groups
Google App Engine for Java group.
To post to this group, send email to google-appengine-j...@googlegroups.com.
To unsubscribe from this group, send email to
google-appengine-java+unsubscr...@googlegroups.com.
For more options, visit this group at
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[appengine-java] Re: how to save binary data in JDO
You're not limited to 1MB - you're just limited to using 1MB
entities. The GAEVFS link I sent you implies that it's files can span
multiple entities. As Mrityunjay stated, though, large storage
requires payment. See the quotas for details:
http://code.google.com/appengine/docs/quotas.html
Jake
On Mar 1, 12:43 pm, Valentino Hankypants f.hirs...@gmx.at wrote:
so i only can upload binary data up to 1 MB?
any possibility to upload binary data with GBs?
greatz
On 1 Mrz., 18:36, Jake jbrooko...@cast.org wrote:
Hey,
Saving binary data to the datastore isn't too difficult - you can just
use a Blob type and ensure that you don't break the 1MB capacity of a
single entity. You can see my class declaration below. The hard
part is converting a file upload to a byte[] and then from a byte[]
back into what you would consider a downloadable file. That
depends, somewhat, on your implementation. For example, I use the
Wicket architecture and all I need to do is
FileUpload f = fileUploadField.getFileUpload();
BinaryFileData b = new BinaryFileData(f.getBytes());
pm.makePersistent(b);
I presume you are not using Wicket, but some other framework. You'll
need to look into how it handles file uploads.
You may also find this interesting:http://code.google.com/p/gaevfs/
I haven't used it, but it skips the whole byte[] thing entirely.
Jake
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class BinaryFileData implements Serializable {
private static final long serialVersionUID = 1L;
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key key;
@Persistent
private String name;
@Persistent
private String mimeType;
@Persistent(defaultFetchGroup=true)
private Blob data;
public BinaryFileData(byte[] bytes) {
this.data = new Blob(bytes);
}
public byte[] getData() {
return data.getBytes();
}
public void setData(byte[] d) {
this.data = new Blob(d);
}
}
On Mar 1, 11:25 am, Valentino Hankypants f.hirs...@gmx.at wrote:
hello together,
i started working with the app engine some days ago, and now i want to
save some binary data (pdf, etc.) from my app (eg by clicking a
button) in the storage system.
anybody who can help me doing this? (tutorials, etc.)
greatz
flo
--
You received this message because you are subscribed to the Google Groups
Google App Engine for Java group.
To post to this group, send email to google-appengine-j...@googlegroups.com.
To unsubscribe from this group, send email to
google-appengine-java+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: how to save binary data in JDO
hi jake,
thanks for your replies.
in my case i have jsp-page with a form. the user should have the
possibility to select a file. i used the input type=file
name=test directive from html.
after the user selected a file, he clicks a button. by clicking this
button the binary data of the selected file should be read and saved
in a blob in the GAE storage.
afterwards i'll give the user the possibility to open the uploaded
file by clicking a link...
therefore, should i use this gaevfs or not?
up to now my major problem is, how can i get the binary data from the
form in my servlet class where i handle the form actions? i got all
other informations by HttpServletRequest.getParameter(test);
greatz and hoping for some help ;-)
flo
On 2 Mrz., 15:24, Jake jbrooko...@cast.org wrote:
You're not limited to 1MB - you're just limited to using 1MB
entities. The GAEVFS link I sent you implies that it's files can span
multiple entities. As Mrityunjay stated, though, large storage
requires payment. See the quotas for
details:http://code.google.com/appengine/docs/quotas.html
Jake
On Mar 1, 12:43 pm, Valentino Hankypants f.hirs...@gmx.at wrote:
so i only can upload binary data up to 1 MB?
any possibility to upload binary data with GBs?
greatz
On 1 Mrz., 18:36, Jake jbrooko...@cast.org wrote:
Hey,
Saving binary data to the datastore isn't too difficult - you can just
use a Blob type and ensure that you don't break the 1MB capacity of a
single entity. You can see my class declaration below. The hard
part is converting a file upload to a byte[] and then from a byte[]
back into what you would consider a downloadable file. That
depends, somewhat, on your implementation. For example, I use the
Wicket architecture and all I need to do is
FileUpload f = fileUploadField.getFileUpload();
BinaryFileData b = new BinaryFileData(f.getBytes());
pm.makePersistent(b);
I presume you are not using Wicket, but some other framework. You'll
need to look into how it handles file uploads.
You may also find this interesting:http://code.google.com/p/gaevfs/
I haven't used it, but it skips the whole byte[] thing entirely.
Jake
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class BinaryFileData implements Serializable {
private static final long serialVersionUID = 1L;
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key key;
@Persistent
private String name;
@Persistent
private String mimeType;
@Persistent(defaultFetchGroup=true)
private Blob data;
public BinaryFileData(byte[] bytes) {
this.data = new Blob(bytes);
}
public byte[] getData() {
return data.getBytes();
}
public void setData(byte[] d) {
this.data = new Blob(d);
}
}
On Mar 1, 11:25 am, Valentino Hankypants f.hirs...@gmx.at wrote:
hello together,
i started working with the app engine some days ago, and now i want to
save some binary data (pdf, etc.) from my app (eg by clicking a
button) in the storage system.
anybody who can help me doing this? (tutorials, etc.)
greatz
flo
--
You received this message because you are subscribed to the Google Groups
Google App Engine for Java group.
To post to this group, send email to google-appengine-j...@googlegroups.com.
To unsubscribe from this group, send email to
google-appengine-java+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: how to save binary data in JDO
Hey,
Saving binary data to the datastore isn't too difficult - you can just
use a Blob type and ensure that you don't break the 1MB capacity of a
single entity. You can see my class declaration below. The hard
part is converting a file upload to a byte[] and then from a byte[]
back into what you would consider a downloadable file. That
depends, somewhat, on your implementation. For example, I use the
Wicket architecture and all I need to do is
FileUpload f = fileUploadField.getFileUpload();
BinaryFileData b = new BinaryFileData(f.getBytes());
pm.makePersistent(b);
I presume you are not using Wicket, but some other framework. You'll
need to look into how it handles file uploads.
You may also find this interesting: http://code.google.com/p/gaevfs/
I haven't used it, but it skips the whole byte[] thing entirely.
Jake
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class BinaryFileData implements Serializable {
private static final long serialVersionUID = 1L;
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key key;
@Persistent
private String name;
@Persistent
private String mimeType;
@Persistent(defaultFetchGroup=true)
private Blob data;
public BinaryFileData(byte[] bytes) {
this.data = new Blob(bytes);
}
public byte[] getData() {
return data.getBytes();
}
public void setData(byte[] d) {
this.data = new Blob(d);
}
}
On Mar 1, 11:25 am, Valentino Hankypants f.hirs...@gmx.at wrote:
hello together,
i started working with the app engine some days ago, and now i want to
save some binary data (pdf, etc.) from my app (eg by clicking a
button) in the storage system.
anybody who can help me doing this? (tutorials, etc.)
greatz
flo
--
You received this message because you are subscribed to the Google Groups
Google App Engine for Java group.
To post to this group, send email to google-appengine-j...@googlegroups.com.
To unsubscribe from this group, send email to
google-appengine-java+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: how to save binary data in JDO
so i only can upload binary data up to 1 MB?
any possibility to upload binary data with GBs?
greatz
On 1 Mrz., 18:36, Jake jbrooko...@cast.org wrote:
Hey,
Saving binary data to the datastore isn't too difficult - you can just
use a Blob type and ensure that you don't break the 1MB capacity of a
single entity. You can see my class declaration below. The hard
part is converting a file upload to a byte[] and then from a byte[]
back into what you would consider a downloadable file. That
depends, somewhat, on your implementation. For example, I use the
Wicket architecture and all I need to do is
FileUpload f = fileUploadField.getFileUpload();
BinaryFileData b = new BinaryFileData(f.getBytes());
pm.makePersistent(b);
I presume you are not using Wicket, but some other framework. You'll
need to look into how it handles file uploads.
You may also find this interesting:http://code.google.com/p/gaevfs/
I haven't used it, but it skips the whole byte[] thing entirely.
Jake
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class BinaryFileData implements Serializable {
private static final long serialVersionUID = 1L;
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key key;
@Persistent
private String name;
@Persistent
private String mimeType;
@Persistent(defaultFetchGroup=true)
private Blob data;
public BinaryFileData(byte[] bytes) {
this.data = new Blob(bytes);
}
public byte[] getData() {
return data.getBytes();
}
public void setData(byte[] d) {
this.data = new Blob(d);
}
}
On Mar 1, 11:25 am, Valentino Hankypants f.hirs...@gmx.at wrote:
hello together,
i started working with the app engine some days ago, and now i want to
save some binary data (pdf, etc.) from my app (eg by clicking a
button) in the storage system.
anybody who can help me doing this? (tutorials, etc.)
greatz
flo
--
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Google App Engine for Java group.
To post to this group, send email to google-appengine-j...@googlegroups.com.
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google-appengine-java+unsubscr...@googlegroups.com.
For more options, visit this group at
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