();
headers.put("My-Username-Header", request.getRemoteUser());
API.embedFormJava(…, headers);
```
If needed, you can also [pass the user's roles and group through additional headers](https://doc.orbeon.com/~/revisions/-LFrzxlvP9UXA6_RDYI9/access-control-and-permissions/users#if-using-individual-headers).
### Logging configuration
The embedding JAR uses SLF4J for logging. If your application already uses SLF4J and already has slf4j-api.jar, you can remove the one provided by Orbeon under `WEB-INF/lib`. Otherwise, you must keep slf4j-api.jar in your application's `WEB-INF/lib` folder.
*OPTIONAL: In addition, if you want to actually configure logging for the embedding library, you must add a logging adapter for SLF4j and the appropriate configuration file, for example for log4j. See the sample configuration file under* `WEB-INF/classes/log4j.properties.template`*.*
### HTTP client configuration
The embedding implementation communicates with the rest of Orbeon Forms via HTTP or HTTPS. In general, you probably won't have to change this configuration. By default, it is as follows:
```markup
oxf.http.stale-checking-enabled
true
oxf.http.so-timeout
0
oxf.http.chunk-requests
false
oxf.http.proxy.host
oxf.http.proxy.port
oxf.http.proxy.exclude
oxf.http.ssl.hostname-verifier
strict
oxf.http.ssl.keystore.uri
oxf.http.ssl.keystore.password
oxf.http.proxy.use-ssl
false
oxf.http.proxy.username
oxf.http.proxy.password
oxf.http.proxy.ntlm.host
oxf.http.proxy.ntlm.domain
```
Details about the meaning of these parameters are [available here](https://doc.orbeon.com/~/revisions/-LFrzxlvP9UXA6_RDYI9/configuration/properties/general).
### HTTP server configuration
You can enable HTTP gzip compression between the embedding implementation and Form Runner. For example, with Tomcat:
```markup
```
## Usage scenarios
In your Java web application, any page covered by the servlet filter can call the embedding API. You can have a single page calling a single form, or several pages each calling a different form. Or, pages can (based on URL parameters, internal application state, etc.), embed a form dynamically.
As of Orbeon Forms 4.7, the embedded form cannot navigate in place to another form or mode (such as Review).
However, it can save form or send form data as it does in the standalone case. It can also run custom [processes](https://doc.orbeon.com/~/revisions/-LFrzxlvP9UXA6_RDYI9/form-runner/advanced/buttons-and-processes) which can redirect the entire embedding page with `navigate`, or run JavaScript functions with `navigate(uri = "javascript:alert('Done!')")`. This allows communicating with the embedding application.
## Form Builder embedding
\[SINCE Orbeon Forms 2016.3]
In addition to published forms, you can embed Form Builder: just use `orbeon` and `builder` as Form Runner app/form names.
The embedding application can set the size the embedded Form Builder `` element via CSS or JavaScript, and Form Builder will adjust its size accordingly:
```markup