/**
 * Terminate Instances Action Sample
 * The TerminateInstances operation shuts down one or more instances. This
 * operation is idempotent; if you terminate an instance more than once, each call
 * will succeed.
 * Terminated instances will remain visible after termination (approximately one
 * hour).  
 * @param Amazon_EC2_Interface $service instance of Amazon_EC2_Interface
 * @param mixed $request Amazon_EC2_Model_TerminateInstances or array of parameters
 */
function invokeTerminateInstances(Amazon_EC2_Interface $service, $request)
{
    try {
        $response = $service->terminateInstances($request);
        echo "Service Response\n";
        echo "=============================================================================\n";
        echo "        TerminateInstancesResponse\n";
        if ($response->isSetResponseMetadata()) {
            echo "            ResponseMetadata\n";
            $responseMetadata = $response->getResponseMetadata();
            if ($responseMetadata->isSetRequestId()) {
                echo "                RequestId\n";
                echo "                    " . $responseMetadata->getRequestId() . "\n";
            }
        }
        if ($response->isSetTerminateInstancesResult()) {
            echo "            TerminateInstancesResult\n";
            $terminateInstancesResult = $response->getTerminateInstancesResult();
            $terminatingInstanceList = $terminateInstancesResult->getTerminatingInstance();
            foreach ($terminatingInstanceList as $terminatingInstance) {
                echo "                TerminatingInstance\n";
                if ($terminatingInstance->isSetInstanceId()) {
                    echo "                    InstanceId\n";
                    echo "                        " . $terminatingInstance->getInstanceId() . "\n";
                }
                if ($terminatingInstance->isSetCurrentState()) {
                    echo "                    CurrentState\n";
                    $currentState = $terminatingInstance->getCurrentState();
                    if ($currentState->isSetCode()) {
                        echo "                        Code\n";
                        echo "                            " . $currentState->getCode() . "\n";
                    }
                    if ($currentState->isSetName()) {
                        echo "                        Name\n";
                        echo "                            " . $currentState->getName() . "\n";
                    }
                }
                if ($terminatingInstance->isSetPreviousState()) {
                    echo "                    PreviousState\n";
                    $previousState = $terminatingInstance->getPreviousState();
                    if ($previousState->isSetCode()) {
                        echo "                        Code\n";
                        echo "                            " . $previousState->getCode() . "\n";
                    }
                    if ($previousState->isSetName()) {
                        echo "                        Name\n";
                        echo "                            " . $previousState->getName() . "\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";
    }
}