[ome-devel] Using omero.gateway.Gateway for sudo-connections

[Christian Carsten Sachs]

Hi Dominik,

thanks for the fast response!

I was playing around with these options but so far had no luck. Attached 
a whole minimal (non)working example:

<<<

Logger logger = new SimpleLogger();
Gateway gateway = new Gateway(logger);

LoginCredentials ADMIN_CREDENTIALS = new LoginCredentials();

ADMIN_CREDENTIALS.getServer().setHostname("hostname");
ADMIN_CREDENTIALS.getUser().setUsername("admin");
ADMIN_CREDENTIALS.getUser().setPassword("password");

ExperimenterData adminUser = gateway.connect(ADMIN_CREDENTIALS);

SecurityContext adminCtx = new SecurityContext(adminUser.getGroupId());

ExperimenterData user = 
gateway.getFacility(AdminFacility.class).lookupExperimenter(adminCtx, 
"normalUserName");

SecurityContext ctx = new SecurityContext(user.getGroupId());

// with or without that line
//ctx = adminCtx;

ctx.setExperimenter(user);
ctx.sudo();

for(DatasetData d : 
gateway.getFacility(BrowseFacility.class).getDatasets(ctx)) {
     System.out.println(d.getName());
}

 >>>

This yields

-! 4/15/16 13:12:15:171 warning: main: null - createSession retry: 1
-! 4/15/16 13:12:20:186 warning: main: null - createSession retry: 2
Could not load hierarchy
omero.gateway.exception.DSOutOfServiceException: Could not derive connector
	at omero.gateway.Gateway.getConnector(Gateway.java:1301)
	at omero.gateway.Gateway.getPojosService(Gateway.java:493)
	at 
omero.gateway.facility.BrowseFacility.getDatasets(BrowseFacility.java:457)
...

(both when I try to set the new experimenter to adminCtx or create a new 
ctx and set it ...)

Am I doing something wrong?

Thanks a lot,
best regards,
Christian Sachs

On 2016-04-15 12:58, Dominik Lindner (Staff) wrote:
> Hi Christian,
>
> it should work when you set the user via SecurityContext.setExperimenter() and set the sudo flag via SecurityContext.sudo().
> Then operations using this SecurityContext will be performed in the user context.
>
> I’ll have to check if we have a working code example in the docs somewhere.
>
> Regards,
> Dominik
>
>
>> On 15 Apr 2016, at 11:47, Christian Carsten Sachs <c.sachs at fz-juelich.de> wrote:
>>
>> Hello,
>>
>> I'd like to connect to OMERO via Java using a sudo connection, i.e.
>> login as an admin user, and then perform actions as another user.
>>
>> While there is example code at
>> https://github.com/openmicroscopy/openmicroscopy/blob/master/examples/OmeroClients/sudo.java
>> the code 'manually' establishes a connection, while the current
>> developer documentation urges to use the omero.gateway.Gateway class to
>> manage the connection (as far as I read, this is the modern and
>> recommended way).
>>
>> Is there any way to use omero.gateway.Gateway for a sudo connection?
>>
>> I played around with something like this,
>>
>> adminUser = gateway.connect(ADMIN_CREDENTIALS);
>>
>> adminCtx = new SecurityContext(adminUser.getGroupId());
>>
>> user =
>> gateway.getFacility(AdminFacility.class).lookupExperimenter(adminCtx,
>> "normalUserName");
>>
>> ctx = new SecurityContext(user.getGroupId());
>>
>> but using ctx lateron fails; I assume the necessary services are not
>> properly started/connected, what gateway would normally do upon login;
>> unfortunately I don't seem to find a way to force the gateway object to
>> do this lateron for another user ...
>>
>> I looked around a bit and have some ideas how it might be done manually
>> ... within omero.gateway.Gateway, but unfortunately as the necessary
>> variables appear private I can't really access that from outside code.
>>
>> Best regards,
>> Christian Sachs
>>
>>
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