Re: Problem creating a RPC Service
would you mind posting the code of the class you are trying to make work? it would be nice to see the package name and imports, as well as how you are using the FileWriter. On Aug 2, 1:42 am, Sednus sed...@gmail.com wrote: Hi, I am tring to implement a service using RPC, this service should be able to take a string (originally written by user on a text area) and save it into a text file onto the server side. My problem is that when I create the FileWriter object Eclipse says that FileWriter is not supporteed by gwt. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: Problem creating a RPC Service
In addition to what Nathan requests, is your backend running on App Engine? They do not support FileWriter. jason On Mon, Aug 3, 2009 at 7:16 AM, Nathan Wells nwwe...@gmail.com wrote: would you mind posting the code of the class you are trying to make work? it would be nice to see the package name and imports, as well as how you are using the FileWriter. On Aug 2, 1:42 am, Sednus sed...@gmail.com wrote: Hi, I am tring to implement a service using RPC, this service should be able to take a string (originally written by user on a text area) and save it into a text file onto the server side. My problem is that when I create the FileWriter object Eclipse says that FileWriter is not supporteed by gwt. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: Problem creating a RPC Service
yes, it is runnning on App Engine, if it's not supported is there
anyway to make this happen?
public class CompileServiceImpl extends RemoteServiceServlet
implements
ICompileSercvice {
public String compile(String code) {
try
{
File file = new File(temp.c);
System.out.println(file created);
BufferedWriter out = new BufferedWriter(new
FileWriter(file));
out.write(code);
out.close();
}}
On Aug 3, 8:38 am, Jason Parekh jasonpar...@gmail.com wrote:
In addition to what Nathan requests, is your backend running on App Engine?
They do not support FileWriter.
jason
On Mon, Aug 3, 2009 at 7:16 AM, Nathan Wells nwwe...@gmail.com wrote:
would you mind posting the code of the class you are trying to make
work? it would be nice to see the package name and imports, as well as
how you are using the FileWriter.
On Aug 2, 1:42 am, Sednus sed...@gmail.com wrote:
Hi,
I am tring to implement a service using RPC, this service
should be able to take a string (originally written by user on a text
area) and save it into a text file onto the server side. My problem
is that when I create the FileWriter object Eclipse says that
FileWriter is not supporteed by gwt.
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
Google Web Toolkit group.
To post to this group, send email to Google-Web-Toolkit@googlegroups.com
To unsubscribe from this group, send email to
google-web-toolkit+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/Google-Web-Toolkit?hl=en
-~--~~~~--~~--~--~---
Re: Problem creating a RPC Service
No, unfortunately you don't have file system access on App Engine. You can
store data in databases, but you won't have any file handlers to that data.
jason
On Mon, Aug 3, 2009 at 11:25 AM, Sednus sed...@gmail.com wrote:
yes, it is runnning on App Engine, if it's not supported is there
anyway to make this happen?
public class CompileServiceImpl extends RemoteServiceServlet
implements
ICompileSercvice {
public String compile(String code) {
try
{
File file = new File(temp.c);
System.out.println(file created);
BufferedWriter out = new BufferedWriter(new
FileWriter(file));
out.write(code);
out.close();
}}
On Aug 3, 8:38 am, Jason Parekh jasonpar...@gmail.com wrote:
In addition to what Nathan requests, is your backend running on App
Engine?
They do not support FileWriter.
jason
On Mon, Aug 3, 2009 at 7:16 AM, Nathan Wells nwwe...@gmail.com wrote:
would you mind posting the code of the class you are trying to make
work? it would be nice to see the package name and imports, as well as
how you are using the FileWriter.
On Aug 2, 1:42 am, Sednus sed...@gmail.com wrote:
Hi,
I am tring to implement a service using RPC, this service
should be able to take a string (originally written by user on a text
area) and save it into a text file onto the server side. My problem
is that when I create the FileWriter object Eclipse says that
FileWriter is not supporteed by gwt.
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
Google Web Toolkit group.
To post to this group, send email to Google-Web-Toolkit@googlegroups.com
To unsubscribe from this group, send email to
google-web-toolkit+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/Google-Web-Toolkit?hl=en
-~--~~~~--~~--~--~---
Re: Problem creating a RPC Service
Well, I really need to create a file on the server side and write on
it whatever the user types on a text area is there any onther way
to accomplish this?
On Aug 3, 10:30 am, Jason Parekh jasonpar...@gmail.com wrote:
No, unfortunately you don't have file system access on App Engine. You can
store data in databases, but you won't have any file handlers to that data.
jason
On Mon, Aug 3, 2009 at 11:25 AM, Sednus sed...@gmail.com wrote:
yes, it is runnning on App Engine, if it's not supported is there
anyway to make this happen?
public class CompileServiceImpl extends RemoteServiceServlet
implements
ICompileSercvice {
public String compile(String code) {
try
{
File file = new File(temp.c);
System.out.println(file created);
BufferedWriter out = new BufferedWriter(new
FileWriter(file));
out.write(code);
out.close();
}}
On Aug 3, 8:38 am, Jason Parekh jasonpar...@gmail.com wrote:
In addition to what Nathan requests, is your backend running on App
Engine?
They do not support FileWriter.
jason
On Mon, Aug 3, 2009 at 7:16 AM, Nathan Wells nwwe...@gmail.com wrote:
would you mind posting the code of the class you are trying to make
work? it would be nice to see the package name and imports, as well as
how you are using the FileWriter.
On Aug 2, 1:42 am, Sednus sed...@gmail.com wrote:
Hi,
I am tring to implement a service using RPC, this service
should be able to take a string (originally written by user on a text
area) and save it into a text file onto the server side. My problem
is that when I create the FileWriter object Eclipse says that
FileWriter is not supporteed by gwt.
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
Google Web Toolkit group.
To post to this group, send email to Google-Web-Toolkit@googlegroups.com
To unsubscribe from this group, send email to
google-web-toolkit+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/Google-Web-Toolkit?hl=en
-~--~~~~--~~--~--~---
Re: Problem creating a RPC Service
Well, I really need to create a file on the server side and write on
it whatever the user types on a text area is there any onther way
to accomplish this?
On Aug 3, 10:30 am, Jason Parekh jasonpar...@gmail.com wrote:
No, unfortunately you don't have file system access on App Engine. You can
store data in databases, but you won't have any file handlers to that data.
jason
On Mon, Aug 3, 2009 at 11:25 AM, Sednus sed...@gmail.com wrote:
yes, it is runnning on App Engine, if it's not supported is there
anyway to make this happen?
public class CompileServiceImpl extends RemoteServiceServlet
implements
ICompileSercvice {
public String compile(String code) {
try
{
File file = new File(temp.c);
System.out.println(file created);
BufferedWriter out = new BufferedWriter(new
FileWriter(file));
out.write(code);
out.close();
}}
On Aug 3, 8:38 am, Jason Parekh jasonpar...@gmail.com wrote:
In addition to what Nathan requests, is your backend running on App
Engine?
They do not support FileWriter.
jason
On Mon, Aug 3, 2009 at 7:16 AM, Nathan Wells nwwe...@gmail.com wrote:
would you mind posting the code of the class you are trying to make
work? it would be nice to see the package name and imports, as well as
how you are using the FileWriter.
On Aug 2, 1:42 am, Sednus sed...@gmail.com wrote:
Hi,
I am tring to implement a service using RPC, this service
should be able to take a string (originally written by user on a text
area) and save it into a text file onto the server side. My problem
is that when I create the FileWriter object Eclipse says that
FileWriter is not supporteed by gwt.
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
Google Web Toolkit group.
To post to this group, send email to Google-Web-Toolkit@googlegroups.com
To unsubscribe from this group, send email to
google-web-toolkit+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/Google-Web-Toolkit?hl=en
-~--~~~~--~~--~--~---
Re: Problem creating a RPC Service
Well, I really need to create a file on the server side and write on
it whatever the user types on a text area is there any onther way
to accomplish this?
On Aug 3, 10:30 am, Jason Parekh jasonpar...@gmail.com wrote:
No, unfortunately you don't have file system access on App Engine. You can
store data in databases, but you won't have any file handlers to that data.
jason
On Mon, Aug 3, 2009 at 11:25 AM, Sednus sed...@gmail.com wrote:
yes, it is runnning on App Engine, if it's not supported is there
anyway to make this happen?
public class CompileServiceImpl extends RemoteServiceServlet
implements
ICompileSercvice {
public String compile(String code) {
try
{
File file = new File(temp.c);
System.out.println(file created);
BufferedWriter out = new BufferedWriter(new
FileWriter(file));
out.write(code);
out.close();
}}
On Aug 3, 8:38 am, Jason Parekh jasonpar...@gmail.com wrote:
In addition to what Nathan requests, is your backend running on App
Engine?
They do not support FileWriter.
jason
On Mon, Aug 3, 2009 at 7:16 AM, Nathan Wells nwwe...@gmail.com wrote:
would you mind posting the code of the class you are trying to make
work? it would be nice to see the package name and imports, as well as
how you are using the FileWriter.
On Aug 2, 1:42 am, Sednus sed...@gmail.com wrote:
Hi,
I am tring to implement a service using RPC, this service
should be able to take a string (originally written by user on a text
area) and save it into a text file onto the server side. My problem
is that when I create the FileWriter object Eclipse says that
FileWriter is not supporteed by gwt.
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
Google Web Toolkit group.
To post to this group, send email to Google-Web-Toolkit@googlegroups.com
To unsubscribe from this group, send email to
google-web-toolkit+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/Google-Web-Toolkit?hl=en
-~--~~~~--~~--~--~---
Re: Problem creating a RPC Service
Well, I really need to create a file on the server side and write on
it whatever the user types on a text area is there any onther way
to accomplish this?
On Aug 3, 10:30 am, Jason Parekh jasonpar...@gmail.com wrote:
No, unfortunately you don't have file system access on App Engine. You can
store data in databases, but you won't have any file handlers to that data.
jason
On Mon, Aug 3, 2009 at 11:25 AM, Sednus sed...@gmail.com wrote:
yes, it is runnning on App Engine, if it's not supported is there
anyway to make this happen?
public class CompileServiceImpl extends RemoteServiceServlet
implements
ICompileSercvice {
public String compile(String code) {
try
{
File file = new File(temp.c);
System.out.println(file created);
BufferedWriter out = new BufferedWriter(new
FileWriter(file));
out.write(code);
out.close();
}}
On Aug 3, 8:38 am, Jason Parekh jasonpar...@gmail.com wrote:
In addition to what Nathan requests, is your backend running on App
Engine?
They do not support FileWriter.
jason
On Mon, Aug 3, 2009 at 7:16 AM, Nathan Wells nwwe...@gmail.com wrote:
would you mind posting the code of the class you are trying to make
work? it would be nice to see the package name and imports, as well as
how you are using the FileWriter.
On Aug 2, 1:42 am, Sednus sed...@gmail.com wrote:
Hi,
I am tring to implement a service using RPC, this service
should be able to take a string (originally written by user on a text
area) and save it into a text file onto the server side. My problem
is that when I create the FileWriter object Eclipse says that
FileWriter is not supporteed by gwt.
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
Google Web Toolkit group.
To post to this group, send email to Google-Web-Toolkit@googlegroups.com
To unsubscribe from this group, send email to
google-web-toolkit+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/Google-Web-Toolkit?hl=en
-~--~~~~--~~--~--~---
Re: Problem creating a RPC Service
Not that I'm aware of (I'm not too familiar with App Engine though, so
hopefully someone else chimes in.)
jason
On Mon, Aug 3, 2009 at 12:00 PM, Sednus sed...@gmail.com wrote:
Well, I really need to create a file on the server side and write on
it whatever the user types on a text area is there any onther way
to accomplish this?
On Aug 3, 10:30 am, Jason Parekh jasonpar...@gmail.com wrote:
No, unfortunately you don't have file system access on App Engine. You
can
store data in databases, but you won't have any file handlers to that
data.
jason
On Mon, Aug 3, 2009 at 11:25 AM, Sednus sed...@gmail.com wrote:
yes, it is runnning on App Engine, if it's not supported is there
anyway to make this happen?
public class CompileServiceImpl extends RemoteServiceServlet
implements
ICompileSercvice {
public String compile(String code) {
try
{
File file = new File(temp.c);
System.out.println(file created);
BufferedWriter out = new BufferedWriter(new
FileWriter(file));
out.write(code);
out.close();
}}
On Aug 3, 8:38 am, Jason Parekh jasonpar...@gmail.com wrote:
In addition to what Nathan requests, is your backend running on App
Engine?
They do not support FileWriter.
jason
On Mon, Aug 3, 2009 at 7:16 AM, Nathan Wells nwwe...@gmail.com
wrote:
would you mind posting the code of the class you are trying to make
work? it would be nice to see the package name and imports, as well
as
how you are using the FileWriter.
On Aug 2, 1:42 am, Sednus sed...@gmail.com wrote:
Hi,
I am tring to implement a service using RPC, this service
should be able to take a string (originally written by user on a
text
area) and save it into a text file onto the server side. My
problem
is that when I create the FileWriter object Eclipse says that
FileWriter is not supporteed by gwt.
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
Google Web Toolkit group.
To post to this group, send email to Google-Web-Toolkit@googlegroups.com
To unsubscribe from this group, send email to
google-web-toolkit+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/Google-Web-Toolkit?hl=en
-~--~~~~--~~--~--~---
Re: Problem creating a RPC Service
Sure, you just have to run it on your own server, running jetty or tomcat, etc. On Mon, Aug 3, 2009 at 12:00 PM, Sednus sed...@gmail.com wrote: Well, I really need to create a file on the server side and write on it whatever the user types on a text area is there any onther way to accomplish this? On Aug 3, 10:30 am, Jason Parekh jasonpar...@gmail.com wrote: No, unfortunately you don't have file system access on App Engine. You can store data in databases, but you won't have any file handlers to that data. jason --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: Problem creating a RPC Service
Yes, I was planning to run it on my own server... but how do I make that while still using GWT? is it possible? On Aug 3, 11:04 am, Daniel Jue teamp...@gmail.com wrote: Sure, you just have to run it on your own server, running jetty or tomcat, etc. On Mon, Aug 3, 2009 at 12:00 PM, Sednus sed...@gmail.com wrote: Well, I really need to create a file on the server side and write on it whatever the user types on a text area is there any onther way to accomplish this? On Aug 3, 10:30 am, Jason Parekh jasonpar...@gmail.com wrote: No, unfortunately you don't have file system access on App Engine. You can store data in databases, but you won't have any file handlers to that data. jason --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: Problem creating a RPC Service
It really has nothing to do with GWT. You would have a servlet on the serverside that responds to rpc calls, and the servlet would call some file writing command. (in the simplest, non-refactored way). The file writing part doesn't care where the input came from. As in logging, you won't be able to guarantee what order the data comes in when getting RPC calls. So multiple commands issued quicky may generate out-of-order text. This said, since you are asking kind of basic questions... Are you absolutely sure you want to write a file on the system? Are you trying to do something unusual? Most people would use a DB tier because it can handle multiple users and updates better, and it's easier to have a timestamp tacked onto the message, where it can be sorted. Cleaning up the filesystem can be a chore. Dealing with the filesystem is a chore. File locking? etc. On Mon, Aug 3, 2009 at 12:26 PM, Sednus sed...@gmail.com wrote: Yes, I was planning to run it on my own server... but how do I make that while still using GWT? is it possible? On Aug 3, 11:04 am, Daniel Jue teamp...@gmail.com wrote: Sure, you just have to run it on your own server, running jetty or tomcat, etc. On Mon, Aug 3, 2009 at 12:00 PM, Sednus sed...@gmail.com wrote: Well, I really need to create a file on the server side and write on it whatever the user types on a text area is there any onther way to accomplish this? On Aug 3, 10:30 am, Jason Parekh jasonpar...@gmail.com wrote: No, unfortunately you don't have file system access on App Engine. You can store data in databases, but you won't have any file handlers to that data. jason --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: Problem creating a RPC Service
Well, I am trying to make an interface so that students can write their code on the web and I can compile it and run it in a computer cluster( Parallel Programs)... For them to see the how they work... but I've never worked woth stuff like this :s I am really noobie , but yes I need to create the file so to compile it and run it, yes its something unususal and i don't know what a DB tier is :( On Aug 3, 11:38 am, Daniel Jue teamp...@gmail.com wrote: It really has nothing to do with GWT. You would have a servlet on the serverside that responds to rpc calls, and the servlet would call some file writing command. (in the simplest, non-refactored way). The file writing part doesn't care where the input came from. As in logging, you won't be able to guarantee what order the data comes in when getting RPC calls. So multiple commands issued quicky may generate out-of-order text. This said, since you are asking kind of basic questions... Are you absolutely sure you want to write a file on the system? Are you trying to do something unusual? Most people would use a DB tier because it can handle multiple users and updates better, and it's easier to have a timestamp tacked onto the message, where it can be sorted. Cleaning up the filesystem can be a chore. Dealing with the filesystem is a chore. File locking? etc. On Mon, Aug 3, 2009 at 12:26 PM, Sednus sed...@gmail.com wrote: Yes, I was planning to run it on my own server... but how do I make that while still using GWT? is it possible? On Aug 3, 11:04 am, Daniel Jue teamp...@gmail.com wrote: Sure, you just have to run it on your own server, running jetty or tomcat, etc. On Mon, Aug 3, 2009 at 12:00 PM, Sednus sed...@gmail.com wrote: Well, I really need to create a file on the server side and write on it whatever the user types on a text area is there any onther way to accomplish this? On Aug 3, 10:30 am, Jason Parekh jasonpar...@gmail.com wrote: No, unfortunately you don't have file system access on App Engine. You can store data in databases, but you won't have any file handlers to that data. jason --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: Problem creating a RPC Service
I dont think that you're looking at your problem right. For starters GWT and AppEngine are to totally separate and unrelated things. If you don't intend to host on AppEngine you probably dont need to develop with it. Using RPC's to add lines of text to a file sounds like a really bad idea. Like everyone else is saying, use a DB. AppEngine should make persisting the info to a DB about as simple as it gets. (if you want to use it) When you're ready to pull down the user entered code to compile it you can use an admin GWT page (or a simple servlet) that you would create to read the text from the DB, and send it down to you so that it can be compiled. If you wrote the retrieving component as a servlet then you could set the page content type to plain/text and write the text directly to the response which would give you a file save dialog when you try to retrieve it. Just my quick though to solving the problem, ymmv. On Aug 3, 12:04 pm, Sednus sed...@gmail.com wrote: Well, I am trying to make an interface so that students can write their code on the web and I can compile it and run it in a computer cluster( Parallel Programs)... For them to see the how they work... but I've never worked woth stuff like this :s I am really noobie , but yes I need to create the file so to compile it and run it, yes its something unususal and i don't know what a DB tier is :( On Aug 3, 11:38 am, Daniel Jue teamp...@gmail.com wrote: It really has nothing to do with GWT. You would have a servlet on the serverside that responds to rpc calls, and the servlet would call some file writing command. (in the simplest, non-refactored way). The file writing part doesn't care where the input came from. As in logging, you won't be able to guarantee what order the data comes in when getting RPC calls. So multiple commands issued quicky may generate out-of-order text. This said, since you are asking kind of basic questions... Are you absolutely sure you want to write a file on the system? Are you trying to do something unusual? Most people would use a DB tier because it can handle multiple users and updates better, and it's easier to have a timestamp tacked onto the message, where it can be sorted. Cleaning up the filesystem can be a chore. Dealing with the filesystem is a chore. File locking? etc. On Mon, Aug 3, 2009 at 12:26 PM, Sednus sed...@gmail.com wrote: Yes, I was planning to run it on my own server... but how do I make that while still using GWT? is it possible? On Aug 3, 11:04 am, Daniel Jue teamp...@gmail.com wrote: Sure, you just have to run it on your own server, running jetty or tomcat, etc. On Mon, Aug 3, 2009 at 12:00 PM, Sednus sed...@gmail.com wrote: Well, I really need to create a file on the server side and write on it whatever the user types on a text area is there any onther way to accomplish this? On Aug 3, 10:30 am, Jason Parekh jasonpar...@gmail.com wrote: No, unfortunately you don't have file system access on App Engine. You can store data in databases, but you won't have any file handlers to that data. jason --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: Problem creating a RPC Service
Thinking more on this particular app, I think you've hit the nail on the head. While I don't know all the requirements, I would say you would split this into a few pieces: A console/service app that gets text from somewhere and runs it. (The somewhere could be directly from a DB if you can contact it, or through a servlet request or email.) A GWT web app that records the user entries to a DB. You don't even really *need* GWT's async abilities since you probably aren't trying to do real time compiling on each line, etc. Just a big text box with a submit button on the bottom. A DB structured to hold a user's text data. It would need all the meta data necessary to recreate it as a file (name, timestamp, etc) and also support overwriting/versioning. Back at the university, we would email our jar'd source to an automated account, and then it would scan the source for plagarism, compile it, the run dozens of tests and record the output. Then we'd get the results mailed back to us. Not sure if the plagarism scan was done on the source or on the bytecode, but that's another note of a different song. On Mon, Aug 3, 2009 at 2:17 PM, Trevis trevistho...@gmail.com wrote: I dont think that you're looking at your problem right. For starters GWT and AppEngine are to totally separate and unrelated things. If you don't intend to host on AppEngine you probably dont need to develop with it. Using RPC's to add lines of text to a file sounds like a really bad idea. Like everyone else is saying, use a DB. AppEngine should make persisting the info to a DB about as simple as it gets. (if you want to use it) When you're ready to pull down the user entered code to compile it you can use an admin GWT page (or a simple servlet) that you would create to read the text from the DB, and send it down to you so that it can be compiled. If you wrote the retrieving component as a servlet then you could set the page content type to plain/text and write the text directly to the response which would give you a file save dialog when you try to retrieve it. Just my quick though to solving the problem, ymmv. On Aug 3, 12:04 pm, Sednus sed...@gmail.com wrote: Well, I am trying to make an interface so that students can write their code on the web and I can compile it and run it in a computer cluster( Parallel Programs)... For them to see the how they work... but I've never worked woth stuff like this :s I am really noobie , but yes I need to create the file so to compile it and run it, yes its something unususal and i don't know what a DB tier is :( On Aug 3, 11:38 am, Daniel Jue teamp...@gmail.com wrote: It really has nothing to do with GWT. You would have a servlet on the serverside that responds to rpc calls, and the servlet would call some file writing command. (in the simplest, non-refactored way). The file writing part doesn't care where the input came from. As in logging, you won't be able to guarantee what order the data comes in when getting RPC calls. So multiple commands issued quicky may generate out-of-order text. This said, since you are asking kind of basic questions... Are you absolutely sure you want to write a file on the system? Are you trying to do something unusual? Most people would use a DB tier because it can handle multiple users and updates better, and it's easier to have a timestamp tacked onto the message, where it can be sorted. Cleaning up the filesystem can be a chore. Dealing with the filesystem is a chore. File locking? etc. On Mon, Aug 3, 2009 at 12:26 PM, Sednus sed...@gmail.com wrote: Yes, I was planning to run it on my own server... but how do I make that while still using GWT? is it possible? On Aug 3, 11:04 am, Daniel Jue teamp...@gmail.com wrote: Sure, you just have to run it on your own server, running jetty or tomcat, etc. On Mon, Aug 3, 2009 at 12:00 PM, Sednus sed...@gmail.com wrote: Well, I really need to create a file on the server side and write on it whatever the user types on a text area is there any onther way to accomplish this? On Aug 3, 10:30 am, Jason Parekh jasonpar...@gmail.com wrote: No, unfortunately you don't have file system access on App Engine. You can store data in databases, but you won't have any file handlers to that data. jason --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: Problem creating a RPC Service
Thanks a lot guys, I'll give it a try. On Aug 3, 1:40 pm, Daniel Jue teamp...@gmail.com wrote: Thinking more on this particular app, I think you've hit the nail on the head. While I don't know all the requirements, I would say you would split this into a few pieces: A console/service app that gets text from somewhere and runs it. (The somewhere could be directly from a DB if you can contact it, or through a servlet request or email.) A GWT web app that records the user entries to a DB. You don't even really *need* GWT's async abilities since you probably aren't trying to do real time compiling on each line, etc. Just a big text box with a submit button on the bottom. A DB structured to hold a user's text data. It would need all the meta data necessary to recreate it as a file (name, timestamp, etc) and also support overwriting/versioning. Back at the university, we would email our jar'd source to an automated account, and then it would scan the source for plagarism, compile it, the run dozens of tests and record the output. Then we'd get the results mailed back to us. Not sure if the plagarism scan was done on the source or on the bytecode, but that's another note of a different song. On Mon, Aug 3, 2009 at 2:17 PM, Trevis trevistho...@gmail.com wrote: I dont think that you're looking at your problem right. For starters GWT and AppEngine are to totally separate and unrelated things. If you don't intend to host on AppEngine you probably dont need to develop with it. Using RPC's to add lines of text to a file sounds like a really bad idea. Like everyone else is saying, use a DB. AppEngine should make persisting the info to a DB about as simple as it gets. (if you want to use it) When you're ready to pull down the user entered code to compile it you can use an admin GWT page (or a simple servlet) that you would create to read the text from the DB, and send it down to you so that it can be compiled. If you wrote the retrieving component as a servlet then you could set the page content type to plain/text and write the text directly to the response which would give you a file save dialog when you try to retrieve it. Just my quick though to solving the problem, ymmv. On Aug 3, 12:04 pm, Sednus sed...@gmail.com wrote: Well, I am trying to make an interface so that students can write their code on the web and I can compile it and run it in a computer cluster( Parallel Programs)... For them to see the how they work... but I've never worked woth stuff like this :s I am really noobie , but yes I need to create the file so to compile it and run it, yes its something unususal and i don't know what a DB tier is :( On Aug 3, 11:38 am, Daniel Jue teamp...@gmail.com wrote: It really has nothing to do with GWT. You would have a servlet on the serverside that responds to rpc calls, and the servlet would call some file writing command. (in the simplest, non-refactored way). The file writing part doesn't care where the input came from. As in logging, you won't be able to guarantee what order the data comes in when getting RPC calls. So multiple commands issued quicky may generate out-of-order text. This said, since you are asking kind of basic questions... Are you absolutely sure you want to write a file on the system? Are you trying to do something unusual? Most people would use a DB tier because it can handle multiple users and updates better, and it's easier to have a timestamp tacked onto the message, where it can be sorted. Cleaning up the filesystem can be a chore. Dealing with the filesystem is a chore. File locking? etc. On Mon, Aug 3, 2009 at 12:26 PM, Sednus sed...@gmail.com wrote: Yes, I was planning to run it on my own server... but how do I make that while still using GWT? is it possible? On Aug 3, 11:04 am, Daniel Jue teamp...@gmail.com wrote: Sure, you just have to run it on your own server, running jetty or tomcat, etc. On Mon, Aug 3, 2009 at 12:00 PM, Sednus sed...@gmail.com wrote: Well, I really need to create a file on the server side and write on it whatever the user types on a text area is there any onther way to accomplish this? On Aug 3, 10:30 am, Jason Parekh jasonpar...@gmail.com wrote: No, unfortunately you don't have file system access on App Engine. You can store data in databases, but you won't have any file handlers to that data. jason --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at
