Hi,
In my humble opinion, the only way that makes sense is to create a proxy
object on the client side. The proxy hands out a "fake" connection to the
client and makes it transparent to the client where the "real" connection
really lives.
Client <--- ODBC ---> proxy driver <--- RPC ----> server driver
<--- ODBC ---> connection
Whether or not the approach as a whole makes sense, and whether it will be
performant enough to satisfy your needs, is another story.
Have fun,
JensG
-----Ursprüngliche Nachricht-----
From: reena upadhyay
Sent: Wednesday, June 17, 2015 8:17 PM
To: [email protected]
Subject: Re: How to represent java object as return type of service in
.thrift file
I have built custom ODBC driver which works at client side, and there I
would need a connection object.
On Wed, Jun 17, 2015 at 11:43 PM, Stuart Reynolds <[email protected]>
wrote:
This isn't going to work. A java.sql.Connection contains data that
can't be communicated outside of the process (e.g. file system
objects)
This is a limitation of (almost all) network communication protocols,
not specifically thrift.
I guess, *why* do you want to send a Connection object out of your
process?
There's probably something more sensible that you should send instead.
On Wed, Jun 17, 2015 at 11:00 AM, reena upadhyay <[email protected]>
wrote:
> Ok. Thanks for the reply.
>
> But my actual use case is: I want my service to return
java.sql.Connection
> object, and this data type is not supported in hive. How it represent it
in
> thrift file?
>
> .thrift file is:
>
> service databaseService{
> Connection openConnection(),}
>
>
> The openConnection method code in service implementation class:
>
> @Override
> public Connection openConnection() throws TException {
> // here is the code that fetch the user object from database
> return connecton;
> }
>
>
> On Wed, Jun 17, 2015 at 11:19 PM, nash <[email protected]> wrote:
>
>> I typically do it like this:
>>
>> struct User {
>> 1: required string username;
>> 2: required i32 id;
>> 3: required string homedir;
>> }
>>
>> service UserService {
>> User getUser(1:i32 userid);
>> }
>>
>> When I compile the thrift file, it generates the User class.
>>
>> --nash
>>
>> On Wed, Jun 17, 2015 at 10:41 AM reena upadhyay <[email protected]>
>> wrote:
>>
>> > I'm developing a service using apache thrift. I have a service named
>> > getUser which returns User object. I couldn't find any way to define
>> > user-defined data type as a return type for my service defined in
.thrift
>> > file.
>> >
>> > user.thrift file looks like:
>> >
>> > service UserService{
>> > User getUser(1:i32 userId),}
>> >
>> > When I am compiling the user.thrift to generate java source code, I
>> > am
>> > getting "*Type "User" has not been defined*" error. Can anyone please
>> help
>> > me, how to represent this user-defined java object as a data type in
>> > thrift.
>> >
>> > The getUser method code in service implementation class:
>> >
>> > @Override
>> > public User getUser(int user id) throws TException {
>> > // here is the code that fetch the user object from database
>> > return user;
>> > }
>> >
>> > This is my User class, whose object is being returned by service
getUser:
>> >
>> > public class User {
>> >
>> > private int userId;private String name;private String city;private
>> > String country;public int getUserId() {
>> > return userId;}public void setUserId(int userId) {
>> > this.userId = userId;}public String getName() {
>> > return name;}public void setName(String name) {
>> > this.name = name;}public String getCity() {
>> > return city;}public void setCity(String city) {
>> > this.city = city;}public String getCountry() {
>> > return country;}public void setCountry(String country) {
>> > this.country = country;}
>> >
>> > }
>> >
>>
