/**
 * Describe Instance Attribute Action Sample
 * Returns information about an attribute of an instance. Only one attribute can be specified per call.  
 * @param Amazon_EC2_Interface $service instance of Amazon_EC2_Interface
 * @param mixed $request Amazon_EC2_Model_DescribeInstanceAttribute or array of parameters
 */
function invokeDescribeInstanceAttribute(Amazon_EC2_Interface $service, $request)
{
    try {
        $response = $service->describeInstanceAttribute($request);
        echo "Service Response\n";
        echo "=============================================================================\n";
        echo "        DescribeInstanceAttributeResponse\n";
        if ($response->isSetResponseMetadata()) {
            echo "            ResponseMetadata\n";
            $responseMetadata = $response->getResponseMetadata();
            if ($responseMetadata->isSetRequestId()) {
                echo "                RequestId\n";
                echo "                    " . $responseMetadata->getRequestId() . "\n";
            }
        }
        if ($response->isSetDescribeInstanceAttributeResult()) {
            echo "            DescribeInstanceAttributeResult\n";
            $describeInstanceAttributeResult = $response->getDescribeInstanceAttributeResult();
            if ($describeInstanceAttributeResult->isSetInstanceAttribute()) {
                echo "                InstanceAttribute\n";
                $instanceAttribute = $describeInstanceAttributeResult->getInstanceAttribute();
                if ($instanceAttribute->isSetInstanceId()) {
                    echo "                    InstanceId\n";
                    echo "                        " . $instanceAttribute->getInstanceId() . "\n";
                }
                if ($instanceAttribute->isSetInstanceType()) {
                    echo "                    InstanceType\n";
                    echo "                        " . $instanceAttribute->getInstanceType() . "\n";
                }
                if ($instanceAttribute->isSetKernelId()) {
                    echo "                    KernelId\n";
                    echo "                        " . $instanceAttribute->getKernelId() . "\n";
                }
                if ($instanceAttribute->isSetRamdiskId()) {
                    echo "                    RamdiskId\n";
                    echo "                        " . $instanceAttribute->getRamdiskId() . "\n";
                }
                if ($instanceAttribute->isSetUserData()) {
                    echo "                    UserData\n";
                    echo "                        " . $instanceAttribute->getUserData() . "\n";
                }
                if ($instanceAttribute->isSetDisableApiTermination()) {
                    echo "                    DisableApiTermination\n";
                    echo "                        " . $instanceAttribute->getDisableApiTermination() . "\n";
                }
                if ($instanceAttribute->isSetInstanceInitiatedShutdownBehavior()) {
                    echo "                    InstanceInitiatedShutdownBehavior\n";
                    echo "                        " . $instanceAttribute->getInstanceInitiatedShutdownBehavior() . "\n";
                }
                if ($instanceAttribute->isSetRootDeviceName()) {
                    echo "                    RootDeviceName\n";
                    echo "                        " . $instanceAttribute->getRootDeviceName() . "\n";
                }
                $blockDeviceMappingList = $instanceAttribute->getBlockDeviceMapping();
                foreach ($blockDeviceMappingList as $blockDeviceMapping) {
                    echo "                    BlockDeviceMapping\n";
                    if ($blockDeviceMapping->isSetDeviceName()) {
                        echo "                        DeviceName\n";
                        echo "                            " . $blockDeviceMapping->getDeviceName() . "\n";
                    }
                    if ($blockDeviceMapping->isSetEbs()) {
                        echo "                        Ebs\n";
                        $ebs = $blockDeviceMapping->getEbs();
                        if ($ebs->isSetVolumeId()) {
                            echo "                            VolumeId\n";
                            echo "                                " . $ebs->getVolumeId() . "\n";
                        }
                        if ($ebs->isSetStatus()) {
                            echo "                            Status\n";
                            echo "                                " . $ebs->getStatus() . "\n";
                        }
                        if ($ebs->isSetAttachTime()) {
                            echo "                            AttachTime\n";
                            echo "                                " . $ebs->getAttachTime() . "\n";
                        }
                        if ($ebs->isSetDeleteOnTermination()) {
                            echo "                            DeleteOnTermination\n";
                            echo "                                " . $ebs->getDeleteOnTermination() . "\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";
    }
}