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Welcome to the AWS Code Examples Repository. This repo contains code examples used in the AWS documentation, AWS SDK Developer Guides, and more. For more information, see the Readme.md file below.

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4136 add cpp lambda runtime (#4244) * lambda runtime working * revised documentation * editorial fixes * Code review fixes
2023-01-20 12:36:13 -05:00
// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
#include <memory>
#include <cstring>
#include <aws/lambda-runtime/runtime.h>
#include <aws/logging/logging.h>
#include <json/json.h>
using namespace aws::lambda_runtime;
char const ACTION_KEY[] = "action";
char const NUMBER_X_KEY[] = "x";
char const NUMBER_Y_KEY[] = "y";
char const RESULT_KEY[] = "result";
char const PLUS_ACTION[] = "plus";
char const MINUS_ACTION[] = "minus";
char const TIMES_ACTION[] = "times";
char const DIVIDED_BY_ACTION[] = "divided-by";
char const TAG[] = "LAMBDA_LOG";
static aws::logging::verbosity gLogLevel = aws::logging::verbosity::error;
static void myLog(aws::logging::verbosity v, char const* tag, char const* msg, va_list args);
[[gnu::format(printf, 2, 3)]] static void log_error(char const* tag, char const* msg, ...);
[[gnu::format(printf, 2, 3)]] static void log_info(char const* tag, char const* msg, ...);
[[gnu::format(printf, 2, 3)]] static void log_debug(char const* tag, char const* msg, ...);
invocation_response my_handler(invocation_request const& request)
{
log_debug(TAG, "my_handler called.");
Json::Value root;
Json::CharReaderBuilder charReaderBuilder;
const std::unique_ptr<Json::CharReader> reader(charReaderBuilder.newCharReader());
JSONCPP_STRING err;
if (!reader->parse(request.payload.c_str(), request.payload.c_str() + request.payload.length(), &root,
&err)) {
return invocation_response::failure(std::string("Failed to parse input JSON. ") + err, "InvalidJSON");
}
if (!root.isMember(ACTION_KEY) || !root[ACTION_KEY].isString())
{
return invocation_response::failure("Missing valid 'action'.", "InvalidInput");
}
if (!root.isMember(NUMBER_X_KEY) || !root[NUMBER_X_KEY].isNumeric())
{
return invocation_response::failure("Missing valid 'x'.", "InvalidInput");
}
if (!root.isMember(NUMBER_Y_KEY) || !root[NUMBER_Y_KEY].isNumeric())
{
return invocation_response::failure("Missing valid 'y'.", "InvalidInput");
}
log_debug(TAG, "Json input is correct");
std::string action = root[ACTION_KEY].asString();
double x_number = root[NUMBER_X_KEY].asDouble();
double y_number = root[NUMBER_Y_KEY].asDouble();
if (action == PLUS_ACTION)
{
log_info(TAG, "operation %f + %f = %f", x_number, y_number, x_number + y_number);
Json::Value result;
result[RESULT_KEY] = x_number + y_number;
Json::StreamWriterBuilder builder;
return invocation_response::success(Json::writeString(builder, result), "application/json");
}
else if (action == MINUS_ACTION)
{
log_info(TAG, "operation %f - %f = %f", x_number, y_number, x_number - y_number);
Json::Value result;
result[RESULT_KEY] = x_number - y_number;
Json::StreamWriterBuilder builder;
return invocation_response::success(Json::writeString(builder, result), "application/json");
}
else if (action == TIMES_ACTION)
{
log_info(TAG, "operation %f * %f = %f", x_number, y_number, x_number * y_number);
Json::Value result;
result[RESULT_KEY] = x_number * y_number;
Json::StreamWriterBuilder builder;
return invocation_response::success(Json::writeString(builder, result), "application/json");
}
else if (action == DIVIDED_BY_ACTION)
{
if (y_number== 0)
{
log_error (TAG, "Divide by zero error");
return invocation_response::failure("Divide by zero error", "InvalidOperand");
}
log_info(TAG, "operation %f / %f = %f", x_number, y_number, x_number / y_number);
Json::Value result;
result[RESULT_KEY] = x_number / y_number;
Json::StreamWriterBuilder builder;
return invocation_response::success(Json::writeString(builder, result), "application/json");
}
else
{
log_error (TAG, "Unimplemented action %s", action.c_str());
return invocation_response::failure(std::string("Invalid action. ") + action, "InvalidAction");
}
}
CPP: Lambda - update Dockerfile (#4945) * simplified the cpp lambda * Changed lambda runtime to debug * Added tag to docker file source
2023-06-27 12:03:19 -04:00
int main(int argc, char *argv[])
4136 add cpp lambda runtime (#4244) * lambda runtime working * revised documentation * editorial fixes * Code review fixes
2023-01-20 12:36:13 -05:00
{
CPP: Lambda - update Dockerfile (#4945) * simplified the cpp lambda * Changed lambda runtime to debug * Added tag to docker file source
2023-06-27 12:03:19 -04:00
if (argc > 1)
{
aws::logging::log_info (TAG, "Lambda executable %s called with handler %s.", argv[0], argv[1]);
}
4136 add cpp lambda runtime (#4244) * lambda runtime working * revised documentation * editorial fixes * Code review fixes
2023-01-20 12:36:13 -05:00
const char* log_level = std::getenv("LOG_LEVEL");
if (log_level)
{
if (strcmp("DEBUG", log_level) == 0)
{
gLogLevel = aws::logging::verbosity::debug;
}
else if (strcmp("INFO", log_level) == 0)
{
gLogLevel = aws::logging::verbosity::info;
}
}
run_handler(my_handler);
return 0;
}
void myLog(aws::logging::verbosity v, char const* tag, char const* msg, va_list args)
{
if (v <= gLogLevel)
{
aws::logging::log(v, tag, msg, args);
}
}
[[gnu::format(printf, 2, 3)]] inline void log_error(char const* tag, char const* msg, ...)
{
va_list args;
va_start(args, msg);
myLog(aws::logging::verbosity::error, tag, msg, args);
va_end(args);
(void)tag;
(void)msg;
}
[[gnu::format(printf, 2, 3)]] inline void log_info(char const* tag, char const* msg, ...)
{
va_list args;
va_start(args, msg);
myLog(aws::logging::verbosity::info, tag, msg, args);
va_end(args);
}
[[gnu::format(printf, 2, 3)]] inline void log_debug(char const* tag, char const* msg, ...)
{
va_list args;
va_start(args, msg);
myLog(aws::logging::verbosity::debug, tag, msg, args);
va_end(args);
}
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