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/**
*
*/
package uk.org.ury.backend.server;
import java.util.HashMap;
import java.util.Map;
import uk.org.ury.backend.server.ApiRequestHandler;
import uk.org.ury.backend.server.Server;
import uk.org.ury.backend.server.exceptions.HandleFailureException;
/**
* A request handler for server queries.
*
* @author Matt Windsor
*/
public class ServerRequestHandler implements ApiRequestHandler
{
/**
* Handle a server GET request (that is, a request for data
* output).
*
* @param parameters A key-value map of parameters supplied with
* the server request. Typically, the function
* parameter will detail the function that the
* request handler is expected to perform.
*
* @param server The server from which the request originated.
* This will be able to provide the handler with
* pooled resources, for example the database.
*
* @return A list of lines to return in the body of the
* server's response to the client.
*
* @throws HandleFailureException if the handler cannot
* handle the request.
*/
@Override
public Map<String, Object>
handleGetRequest (Map<String, String> parameters, Server server)
throws HandleFailureException
{
Map<String, Object> response = new HashMap<String, Object> ();
if (parameters.containsKey ("function"))
{
String function = parameters.get ("function");
if (function.equals ("info"))
{
getInfo (response, server);
}
else if (function.equals ("help"))
{
response.put ("INFO", "Available functions:");
response.put ("INFO", "info - Get server information.");
}
else if (function.equals ("test"))
response.put ("INFO", "Test succeeded.");
else
throw new HandleFailureException ("Unknown function: "
+ function + ". (Try 'function=help'.)");
}
else
throw new HandleFailureException ("No function provided. (Try 'function=help'.)");
return response;
}
/**
* Retrieve information about the server.
*
* @param response The response list to populate.
*
* @param server The server providing database resources.
*
* @throws HandleFailureException if an error occurs
* that thwarts the handling of the request.
*/
private void
getInfo (Map<String, Object> response, Server server)
throws HandleFailureException
{
response.put ("INFO", "University Radio York BAPS Replacement");
response.put ("INFO", "Server version is " + server.getVersion ());
}
}
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