/**
 * Associate Address Action Sample
 * The AssociateAddress operation associates an elastic IP address with an
 * instance.
 * If the IP address is currently assigned to another instance, the IP address is
 * assigned to the new instance. This is an idempotent operation. If you enter it
 * more than once, Amazon EC2 does not return an error.  
 * @param Amazon_EC2_Interface $service instance of Amazon_EC2_Interface
 * @param mixed $request Amazon_EC2_Model_AssociateAddress or array of parameters
 */
function invokeAssociateAddress(Amazon_EC2_Interface $service, $request)
{
    try {
        $response = $service->associateAddress($request);
        echo "Service Response\n";
        echo "=============================================================================\n";
        echo "        AssociateAddressResponse\n";
        if ($response->isSetResponseMetadata()) {
            echo "            ResponseMetadata\n";
            $responseMetadata = $response->getResponseMetadata();
            if ($responseMetadata->isSetRequestId()) {
                echo "                RequestId\n";
                echo "                    " . $responseMetadata->getRequestId() . "\n";
            }
        }
    } catch (Amazon_EC2_Exception $ex) {
        echo "Caught Exception: " . $ex->getMessage() . "\n";
        echo "Response Status Code: " . $ex->getStatusCode() . "\n";
        echo "Error Code: " . $ex->getErrorCode() . "\n";
        echo "Error Type: " . $ex->getErrorType() . "\n";
        echo "Request ID: " . $ex->getRequestId() . "\n";
        echo "XML: " . $ex->getXML() . "\n";
    }
}