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redistest.cpp
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redistest.cpp
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// Copyright 2018 Stephan Menzel. Distributed under the Boost
// Software License, Version 1.0. (See accompanying file
// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
#include "mredis/AsyncClient.hpp"
#include "mredis/BlockingRetriever.hpp"
#include "tools/Log.hpp"
#include "tools/Error.hpp"
#include "tools/Random.hpp"
#include <boost/config.hpp>
#include <boost/thread.hpp>
#include <boost/asio.hpp>
#include <boost/chrono.hpp>
#include <boost/program_options.hpp>
#include <boost/fiber/all.hpp>
#ifndef _WIN32
#include <sys/resource.h>
#endif
#include <iostream>
#include <cstdlib>
#include <string>
using namespace moose::mredis;
using namespace moose::tools;
using FPromisedRedisMessage = boost::fibers::promise< RedisMessage >;
using FFutureRedisMessage = boost::fibers::future< RedisMessage >;
std::string server_ip_string;
void output_int_result(future_response &&n_response) {
RedisMessage response = n_response.get();
if (is_int(response)) {
std::cout << "Response: " << boost::get<boost::int64_t>(response) << std::endl;
} else {
std::cerr << "Unexpected response: " << response.which() << std::endl;
};
}
void expect_some_result(future_response &&n_response) {
if (n_response.wait_for(boost::chrono::seconds(5)) == boost::future_status::timeout) {
BOOST_THROW_EXCEPTION(redis_error() << error_message("Timeout expecting value"));
}
// whatever, just return
RedisMessage response = n_response.get();
}
void expect_int_result(future_response &&n_response, const boost::int64_t n_expected_value) {
RedisMessage response = n_response.get();
if (is_int(response)) {
if (boost::get<boost::int64_t>(response) != n_expected_value) {
BOOST_THROW_EXCEPTION(redis_error() << error_message("Unexpected int response")
<< error_argument(boost::get<boost::int64_t>(response)));
}
} else {
BOOST_THROW_EXCEPTION(redis_error() << error_message("Not an int response"));
};
}
void expect_string_result(future_response &&n_response) {
RedisMessage response = n_response.get();
if (is_string(response)) {
std::cout << "Got string response: " << boost::get<std::string>(response) << std::endl;
} else {
BOOST_THROW_EXCEPTION(redis_error() << error_message("Not a string response"));
};
}
void expect_string_result(const RedisMessage &n_response, const std::string &n_expected_string) {
if (is_string(n_response)) {
if (boost::get<std::string>(n_response) != n_expected_string) {
BOOST_THROW_EXCEPTION(redis_error() << error_message("Unexpected string response")
<< error_argument(boost::get<std::string>(n_response)));
}
} else {
BOOST_THROW_EXCEPTION(redis_error() << error_message("Not a string response"));
};
}
void expect_string_result(FFutureRedisMessage &&n_message, const std::string &n_expected_string) {
RedisMessage response = n_message.get();
expect_string_result(response, n_expected_string);
}
void expect_string_result(future_response &&n_response, const std::string &n_expected_string) {
RedisMessage response = n_response.get();
expect_string_result(response, n_expected_string);
}
void expect_null_result(future_response &&n_response) {
RedisMessage response = n_response.get();
if (is_null(response)) {
std::cout << "Got expected null response" << std::endl;
} else {
BOOST_THROW_EXCEPTION(redis_error() << error_message("Not a null response"));
};
}
bool test_binary_get() {
// Test getting and setting a binary value with at least one null byte in it.
const std::string binary_sample("Hello\0 World", 12);
AsyncClient client(server_ip_string);
client.connect();
expect_string_result(client.set("redistest:myval:437!:bin_test_key", binary_sample), "OK");
future_response sr1 = client.get("redistest:myval:437!:bin_test_key");
RedisMessage br1 = sr1.get();
// I expect the response to be a string containing the same binary value
if (!is_string(br1)) {
std::cerr << "not a string response: " << br1.which() << std::endl;
return false;
} else {
if (binary_sample != boost::get<std::string>(br1)) {
std::cerr << "Binary set failed: " << boost::get<std::string>(br1) << std::endl;
return false;
}
}
client.del("redistest:myval:437!:bin_test_key");
return true;
}
// test the eval command a bit. I'll try not to actually test Lua as this is supposed to
// be way out of scope. So I'll keep the actual scripts minimal
bool test_lua() {
try {
AsyncClient client(server_ip_string);
client.connect();
// Very simple set
expect_string_result(
client.eval("return redis.call('set', 'redistest:foo', 'bar')"),
"OK"
);
// check for error condition. I want to know if get for a nonexisting value is an error or 0
expect_null_result(client.eval("return redis.call('get', 'fooo')"));
expect_null_result(client.eval("return redis.pcall('get', 'fooo')"));
expect_null_result(client.eval("return tonumber(redis.pcall('get', 'fooo'))"));
// to be used many times
std::vector<std::string> keys;
std::vector<std::string> args;
// Set with binary arguments
keys.emplace_back(std::string("redistest:Hel\r\nlo", 17));
args.emplace_back(std::string("W\0rld", 5));
expect_string_result(
client.eval("return redis.call('set', KEYS[1], ARGV[1])", keys, args),
"OK"
);
// get the binary string back using regular get and expect to be same
expect_string_result(client.get(std::string("redistest:Hel\r\nlo", 17)), std::string("W\0rld", 5));
keys.clear();
args.clear();
// a little more complex script that increases a number of seats and occupies one if available
expect_string_result(client.set("redistest:used_seats", "3"), "OK");
const std::string add_seat( // It appears as if everything is type-less stored as string.
// In order to make Lua know I intend to treat it as a number, I have
// to explicitly use tonumber()
"local used_seats = tonumber(redis.call('get', KEYS[1])) "
"if used_seats < 4 then "
"redis.call('incr', KEYS[1]) "
"redis.call('set', KEYS[2], ARGV[1]) "
"return 'OK' "
"else "
"return nil "
"end"
);
keys.emplace_back("redistest:used_seats");
keys.emplace_back("redistest:seat4");
args.emplace_back("Moose");
// This should work once
expect_string_result(client.eval(add_seat, keys, args), "OK");
keys[1] = "redistest:seat5";
args[0] = "PoorBugger";
// But not again because all seats are used
expect_null_result(client.eval(add_seat, keys, args));
// Which means, we only have entry one
expect_string_result(client.get("redistest:seat4"), "Moose");
expect_null_result(client.get("redistest:seat5"));
// cleanup
expect_some_result(client.del("redistest:used_seats"));
expect_some_result(client.del("redistest:seat4"));
expect_some_result(client.del(std::string("redistest:Hel\r\nlo", 17)));
expect_some_result(client.del("redistest:foo"));
return true;
} catch (const moose::mredis::redis_error &merr) {
std::cerr << "Error testing lua eval(): " << boost::diagnostic_information(merr) << std::endl;
} catch (...) {
std::cerr << "Unhandled exception testing lua eval()" << std::endl;
}
return false;
}
// Test setting a value with additional parameters
bool test_extended_set_params() {
try {
// Test getting and setting a binary value with at least one null byte in it.
const std::string sample("Hello World!");
AsyncClient client(server_ip_string);
client.connect();
// Delete possibly existing test value
expect_some_result(client.del("redistest:no_exp"));
// First try to set value without XX should fail
expect_null_result(client.set("redistest:no_exp", sample, c_invalid_duration, SetCondition::XX));
// Now set the value with NX should succeed
expect_string_result(client.set("redistest:no_exp", sample, c_invalid_duration, SetCondition::NX), "OK");
// Check the value
expect_string_result(client.get("redistest:no_exp"), sample);
// Now the value should be set. Setting it again with XX should succeed
expect_string_result(client.set("redistest:no_exp", sample, c_invalid_duration, SetCondition::XX), "OK");
// Delete the value again
expect_int_result(client.del("redistest:no_exp"), 1);
// And set it with an expiry time of one second
expect_string_result(client.set("redistest:no_exp", sample, std::chrono::seconds(1)), "OK");
expect_string_result(client.get("redistest:no_exp"), sample);
// wait just over a second
boost::this_thread::sleep_for(boost::chrono::milliseconds(1100));
// and see if the value disappeared
expect_null_result(client.get("redistest:no_exp"));
// cleanup
expect_some_result(client.del("redistest:no_exp"));
return true;
} catch (const moose::mredis::redis_error &merr) {
std::cerr << "Error testing extended set parameters: " << boost::diagnostic_information(merr) << std::endl;
} catch (...) {
std::cerr << "Unhandled exception testing extended set parameters()" << std::endl;
}
return false;
}
// several test from when this was a new thing
bool test_hincr_by() {
AsyncClient client(server_ip_string);
client.connect();
expect_some_result(client.hset("redistest:myhash", "field", "1"));
expect_int_result(client.hincrby("redistest:myhash", "field", 1), 2);
expect_int_result(client.hincrby("redistest:myhash", "field", 1), 3);
expect_int_result(client.hincrby("redistest:myhash", "field", 1), 4);
expect_int_result(client.hincrby("redistest:myhash", "field", 1), 5);
expect_int_result(client.hincrby("redistest:myhash", "field", 1), 6);
expect_int_result(client.hincrby("redistest:myhash", "field", 1), 7);
std::cout << "Wait a sec... " << std::endl;
boost::this_thread::sleep_for(boost::chrono::milliseconds(200));
std::cout << "Again!" << std::endl;
output_int_result(client.hincrby("redistest:myhash", "field", 1));
output_int_result(client.hincrby("redistest:myhash", "field", 1));
output_int_result(client.hincrby("redistest:myhash", "field", 1));
output_int_result(client.hincrby("redistest:myhash", "field", 1));
output_int_result(client.hincrby("redistest:myhash", "field", 1));
output_int_result(client.hincrby("redistest:myhash", "field", 1));
output_int_result(client.hincrby("redistest:myhash", "field", 1));
client.hset("redistest:myhash", "testfield", "moep");
client.hget("redistest:myhash", "testfield", [] (const RedisMessage &n_response) {
expect_string_result(n_response, "moep");
});
boost::this_thread::sleep_for(boost::chrono::milliseconds(50));
expect_some_result(client.set("redistest:myval:437!:test_key", "This is my Test!"));
expect_string_result(client.get("redistest:myval:437!:test_key"), "This is my Test!");
// cleanup
expect_some_result(client.del("redistest:myval:437!:test_key"));
expect_some_result(client.del("redistest:myhash"));
expect_some_result(client.hdel("redistest:myhash", "testfield"));
return true;
}
// see if we can really wait on a fiber
bool test_fibers() {
// test fiber wait
AsyncClient client(server_ip_string);
client.connect();
expect_string_result(client.set("redistest:fibertest_1", "Hello"), "OK");
expect_string_result(client.set("redistest:fibertest_2", "World"), "OK");
std::shared_ptr<FPromisedRedisMessage> prom1(std::make_shared<FPromisedRedisMessage>());
std::shared_ptr<FPromisedRedisMessage> prom2(std::make_shared<FPromisedRedisMessage>());
client.get("redistest:fibertest_1", [prom1] (const RedisMessage &n_message) {
prom1->set_value(n_message);
});
client.get("redistest:fibertest_2", [prom2] (const RedisMessage &n_message) {
prom2->set_value(n_message);
});
expect_string_result(prom2->get_future(), "World");
expect_string_result(prom1->get_future(), "Hello");
expect_some_result(client.del("redistest:fibertest_1"));
expect_some_result(client.del("redistest:fibertest_2"));
return true;
}
bool test_larger_binaries_mt() {
const std::size_t num_keys = 10;
AsyncClient client(server_ip_string);
client.connect();
// Better do a pre-run cleanup in case previous runs had leftovers
for (unsigned int i = 0; i < num_keys; i++) {
future_response res = client.del("redistest:" + std::to_string(i));
if (res.wait_for(boost::chrono::seconds(15)) == boost::future_status::timeout) {
BOOST_THROW_EXCEPTION(redis_error() << error_message("Timeout deleting binary value"));
}
}
// prepare some samples to read and write later
// They are stored as fixed values of random bytes in a map and then read and written to redis
std::map<std::string, std::string> samples;
for (unsigned int i = 0; i < num_keys; i++) {
const boost::uint64_t byte_size = urand(64, 256);
std::string sample;
sample.reserve(byte_size);
for (unsigned int n = 0; n < byte_size; n++) {
sample.push_back(static_cast<char>(urand(0, 255)));
}
// Yes, keys are "0" to "9" as strings
samples["redistest:" + std::to_string(i)] = sample;
}
std::atomic<bool> failed{ false };
// start 10 threads that concurrently write and read those samples
boost::thread_group workers;
for (unsigned int i = 0; i < 10; i++) {
workers.add_thread(new boost::thread{ [&] {
try {
const boost::chrono::steady_clock::time_point thread_start = boost::chrono::steady_clock::now();
// for 30 seconds, we have 10 threads incrementing a value and checking the result or
// trying to cause a timeout, after which we are expected to recover.
// Each failure to do so, causes the thread to end
while (!failed && (boost::chrono::steady_clock::now() - thread_start) < boost::chrono::seconds(30)) {
if (urand(1000) == 1) {
std::cout << ".";
}
// either read or write
if (urand(0, 1) == 0) {
// write one sample
const std::string key = "redistest:" + std::to_string(urand(0, num_keys - 1));
// throw on not OK
expect_string_result(client.set(key, samples[key]), "OK");
} else {
// read one sample
const std::string key = "redistest:" + std::to_string(urand(0, num_keys - 1));
future_response res = client.get(key);
if (res.wait_for(boost::chrono::seconds(15)) == boost::future_status::timeout) {
BOOST_THROW_EXCEPTION(redis_error() << error_message("Timeout getting binary value"));
}
RedisMessage response = res.get();
if (is_null(response)) {
// value not written yet
continue;
}
if (is_string(response)) {
const std::string str_res = boost::get<std::string>(response);
const std::string original_sample = samples[key];
// compare the string with the original in the map
if (original_sample != str_res) {
BOOST_THROW_EXCEPTION(redis_error() << error_message("Retrieved binary value does not match original sample"));
}
} else {
BOOST_THROW_EXCEPTION(redis_error() << error_message("Retrieved binary value does not match original sample"));
}
}
}
std::cout << std::endl;
} catch (const moose_error &merr) {
std::cerr << "Exception in reading / writing large binaries: " << boost::diagnostic_information(merr);
failed.store(true);
}
} } );
}
workers.join_all();
// cleanup
for (unsigned int i = 0; i < num_keys; i++) {
future_response res = client.del("redistest:" + std::to_string(i));
if (res.wait_for(boost::chrono::seconds(15)) == boost::future_status::timeout) {
BOOST_THROW_EXCEPTION(redis_error() << error_message("Timeout deleting binary value"));
}
}
return !failed;
}
using fsec = boost::chrono::duration<float>;
bool test_connection_timeout() {
{
const boost::chrono::steady_clock::time_point start = boost::chrono::steady_clock::now();
try {
std::cerr << "Testing sync connection timeout" << std::endl;
// test connection timeout with our load balancer. It should filter redis port inbound,
// causing our connection to time out
AsyncClient client("TestingInbound-8a9215d5cf5207b9.elb.eu-central-1.amazonaws.com");
// Should timeout after 2 seconds
client.connect();
// We do not want to be here
std::cerr << "Sync connection timeout failed" << std::endl;
return false;
} catch (const moose::mredis::redis_error &merr) {
const fsec dur = (boost::chrono::steady_clock::now() - start);
if (dur > boost::chrono::milliseconds(1900) && dur < boost::chrono::milliseconds(2100)) {
std::cout << "Connection timeout worked OK after " << dur.count() << " secs: " << merr.server_message() << std::endl;
} else {
std::cerr << "Connection timeout unexpected, exception after " << dur.count() << " secs: " << merr.server_message() << std::endl;
return false;
}
}
if ((boost::chrono::steady_clock::now() - start) > boost::chrono::seconds(3)) {
std::cerr << "Connection timeout too long or not at all, perhaps you don't even see this" << std::endl;
}
}
{
std::cerr << "Testing async connection timeout" << std::endl;
const boost::chrono::steady_clock::time_point start = boost::chrono::steady_clock::now();
try {
// Now let's try the same thing with async connect
AsyncClient client("TestingInbound-8a9215d5cf5207b9.elb.eu-central-1.amazonaws.com");
boost::shared_future<bool> ret = client.async_connect();
// Wait for longer than the actual timeout would be, so I can assert than I should be able to get()
if (ret.wait_for(boost::chrono::seconds(30)) == boost::future_status::timeout) {
std::cerr << "Async connection timeout failed, future timed out" << std::endl;
return false;
}
// this will throw if the connection times out
const bool r = ret.get();
boost::ignore_unused(r);
// We do not want to be here
std::cerr << "Async connection timeout failed" << std::endl;
return false;
} catch (const moose::mredis::redis_error &merr) {
const fsec dur = (boost::chrono::steady_clock::now() - start);
if (dur > boost::chrono::milliseconds(1900) && dur < boost::chrono::milliseconds(2100)) {
std::cout << "Async connection timeout worked OK after " << dur.count() << " secs" << std::endl;
} else {
std::cerr << "Async connection timeout unexpected, exception after " << dur.count() << " secs: " << merr.server_message() << std::endl;
return false;
}
}
if ((boost::chrono::steady_clock::now() - start) > boost::chrono::seconds(3)) {
std::cerr << "Async connection timeout too long or not at all, perhaps you don't even see this" << std::endl;
}
}
return true;
}
// see if we can simulate read timeouts
bool test_read_timeout() {
AsyncClient client(server_ip_string);
client.connect();
client.set("redistest:timeout_test_value", "Hello World!");
// OK, now what is the desired behavior?
// If a read timeout from the server occurs, I want the client object to continue to exist,
// but close the connection and re-establish it.
// Existing handlers, like the one that is waiting for response here should be
// salvaged and be called after the re-connect
//
// Alas, this won't be in the cards right now as I lack the time
// and so all I can have now is to shutdown the connection and call the handler
// with an error. Since I am using the retriever, I expect wait_for_response()
// to throw after 5 seconds
//
//
boost::chrono::steady_clock::time_point start = boost::chrono::steady_clock::now();
try {
// Set the wait for the response to 10 seconds
BlockingRetriever< std::vector<RedisMessage> > sleep_getter{ 10 };
// cause timeout after 5 (command will forcably take 6)
client.debug_sleep(7, sleep_getter.responder()); // read timeout is 5 seconds, so this should trigger it
const std::optional< std::vector<RedisMessage> > sr = sleep_getter.wait_for_response();
// Now expect the client to have caused the error after approximately 5 seconds
const fsec dur = (boost::chrono::steady_clock::now() - start);
// Whatever that is, the retriever should have bailed with an exception after 10 seconds
if (dur > boost::chrono::seconds(10)) {
return false;
}
std::cerr << "Read timeout failed, returned after " << dur.count() << " secs" << std::endl;
return false;
} catch (const moose::mredis::redis_error &merr) {
const fsec dur = (boost::chrono::steady_clock::now() - start);
if (dur > boost::chrono::milliseconds(4500) && dur < boost::chrono::milliseconds(5500)) {
std::cout << "Read timeout worked OK after " << dur.count() << " secs" << std::endl;
} else {
std::cerr << "Read timeout did not work, exception after " << dur.count() << " secs: " << merr.server_message() << std::endl;
return false;
}
} catch (...) {
std::cerr << "Unhandled exception caught. Read timeout failed" << std::endl;
return false;
}
// So, what now?
// Since I assume the client has now dropped its connection and I know the server should be OK
// we expect the client to re-connect as the next command comes in
// I'll do this by asking the server for the value we wrote earlier, which
// I expect the reconnect to be done in just over 2 secs, as the debug sleep above should have two left
// hence the tight timeout
start = boost::chrono::steady_clock::now();
try {
BlockingRetriever< std::string > value_getter{ 3 };
client.get("redistest:timeout_test_value", value_getter.responder());
const std::optional<std::string> value = value_getter.wait_for_response();
const fsec dur = (boost::chrono::steady_clock::now() - start);
if (!value || value->empty()) {
std::cerr << "No test value returned from Redis. Command returned after " << dur.count() << " secs" << std::endl;
return false;
} else {
if (*value == "Hello World!") {
if (dur > boost::chrono::milliseconds(1500) && dur < boost::chrono::milliseconds(2500)) {
std::cout << "Reconnect worked OK after " << dur.count() << " secs" << std::endl;
} else {
std::cerr << "Reconnect after unexpected time of " << dur.count() << " secs" << std::endl;
return false;
}
} else {
std::cerr << "Test value did not check out: " << *value << std::endl;
return false;
}
}
} catch (const moose::mredis::redis_error &merr) {
const fsec dur = (boost::chrono::steady_clock::now() - start);
std::cerr << "Reconnect failed after " << dur.count() << " seconds: " << merr.server_message() << std::endl;
return false;
} catch (...) {
const fsec dur = (boost::chrono::steady_clock::now() - start);
std::cerr << "Unhandled exception caught when reconnecting after " << dur.count() << " seconds" << std::endl;
return false;
}
client.del("redistest:timeout_test_value");
try {
std::cout << "Testing recovered client" << std::endl;
// Now do a few more sets and reads, which should now go quickly, as the connection should be stable now
start = boost::chrono::steady_clock::now();
client.set("redistest:testvalue", "42");
expect_int_result(client.incr("redistest:testvalue"), 43);
expect_int_result(client.incr("redistest:testvalue"), 44);
expect_int_result(client.incr("redistest:testvalue"), 45);
expect_int_result(client.incr("redistest:testvalue"), 46);
expect_int_result(client.incr("redistest:testvalue"), 47);
expect_int_result(client.incr("redistest:testvalue"), 48);
client.del("redistest:testvalue");
fsec duration = (boost::chrono::steady_clock::now() - start);
if (duration < boost::chrono::milliseconds(200)) {
std::cout << "Using reconnected client worked OK" << std::endl;
} else {
std::cerr << "Using reconnected client took unreasonably long: " << duration.count() << " secs" << std::endl;
return false;
}
std::cout << "Sleeping this thread for 5 seconds" << std::endl;
boost::this_thread::sleep_for(boost::chrono::seconds(5));
std::cout << "Back to test it again" << std::endl;
// Now do a few more sets and reads, which should now go quickly, as the connection should still be OK
start = boost::chrono::steady_clock::now();
client.set("redistest:testvalue", "42");
expect_int_result(client.incr("redistest:testvalue"), 43);
expect_int_result(client.incr("redistest:testvalue"), 44);
expect_int_result(client.incr("redistest:testvalue"), 45);
expect_int_result(client.incr("redistest:testvalue"), 46);
expect_int_result(client.incr("redistest:testvalue"), 47);
expect_int_result(client.incr("redistest:testvalue"), 48);
client.del("redistest:testvalue");
duration = (boost::chrono::steady_clock::now() - start);
if (duration < boost::chrono::milliseconds(200)) {
std::cout << "Using reconnected client again worked OK" << std::endl;
} else {
std::cerr << "Using reconnected client again took unreasonably long: " << duration.count() << " secs" << std::endl;
return false;
}
std::cout << "Sleeping this thread for 3 more seconds" << std::endl;
boost::this_thread::sleep_for(boost::chrono::seconds(5));
std::cout << "Back to test it one last time" << std::endl;
// Now do a few more sets and reads, which should now go quickly, as the connection should still be OK
start = boost::chrono::steady_clock::now();
client.set("redistest:testvalue", "23");
expect_int_result(client.incr("redistest:testvalue"), 24);
expect_int_result(client.incr("redistest:testvalue"), 25);
expect_int_result(client.incr("redistest:testvalue"), 26);
expect_int_result(client.incr("redistest:testvalue"), 27);
expect_int_result(client.incr("redistest:testvalue"), 28);
expect_int_result(client.incr("redistest:testvalue"), 29);
client.del("redistest:testvalue");
duration = (boost::chrono::steady_clock::now() - start);
if (duration < boost::chrono::milliseconds(200)) {
std::cout << "Using reconnected client again worked OK" << std::endl;
} else {
std::cerr << "Using reconnected client again took unreasonably long: " << duration.count() << " secs" << std::endl;
return false;
}
return true;
} catch (const moose::mredis::redis_error &merr) {
std::cerr << "Error re-using client: " << boost::diagnostic_information(merr) << std::endl;
} catch (...) {
std::cerr << "Unhandled exception using recovered client" << std::endl;
}
return false;
}
// read timeouts in multi-thread usage
bool test_mt_read_timeout() {
AsyncClient client(server_ip_string);
client.connect();
std::atomic<bool> success{ true };
// I am aware that I would have to have a wider lock scope to actually
// have only one cause a timeout. This is not my intention. I should be able to stomach
// more anyway. I just intend to make it very likely only one does it to KISS it
std::atomic<bool> timeout_caused{ false };
const boost::chrono::steady_clock::time_point total_start = boost::chrono::steady_clock::now();
client.set("redistest:mt:testval", "42");
// start 10 threads that concurrently run a test similar to the single threaded read timeout test
boost::thread_group workers;
for (unsigned int i = 0; i < 20; i++) {
workers.add_thread(new boost::thread{ [&] {
const boost::chrono::steady_clock::time_point thread_start = boost::chrono::steady_clock::now();
boost::int64_t current_value = 0;
// for one minute, we have 10 threads incrementing a value and checking the result or
// trying to cause a timeout, after which we are expected to recover.
// Each failure to do so, causes the thread to end
while ((boost::chrono::steady_clock::now() - thread_start) < boost::chrono::seconds(60)) {
if (moose::tools::urand(50000) == 1) {
std::cout << "Thread " << boost::this_thread::get_id() << " ticking" << std::endl;
}
// In rare (.001%) of cases I want to cause a timeout, in all others I
// just do an increment to cause traffic
if (moose::tools::urand(100000) == 1) {
if (timeout_caused) {
continue;
}
std::cout << "Causing timeout" << std::endl;
timeout_caused.store(true);
const boost::chrono::steady_clock::time_point start = boost::chrono::steady_clock::now();
try {
// Set the wait for the response to 9 seconds
BlockingRetriever< std::vector<RedisMessage> > sleep_getter{ 9 };
client.debug_sleep(7, sleep_getter.responder()); // read timeout is 5 seconds, so this should trigger it
const std::optional< std::vector<RedisMessage> > sr = sleep_getter.wait_for_response();
// Now expect the client to have caused the error after approximately 5 seconds
// because this is when the timeout hits
const fsec dur = (boost::chrono::steady_clock::now() - start);
// Whatever that is, the retriever should have bailed with an exception after 9 seconds
if (dur > boost::chrono::milliseconds(9500)) {
std::cerr << "mt read timeout unexpectedly long after " << dur.count() << " secs" << std::endl;
success.store(false);
break;
}
// We are not supposed to arrive here
std::cerr << "Read timeout failed, returned after " << dur.count() << " secs" << std::endl;
success.store(false);
break;
} catch (const moose::mredis::redis_error &merr) {
const fsec dur = (boost::chrono::steady_clock::now() - start);
if (dur > boost::chrono::milliseconds(4500) && dur < boost::chrono::milliseconds(5500)) {
std::cout << "Read timeout worked OK after " << dur.count() << " secs" << std::endl;
} else {
std::cerr << "Read timeout did not work, exception after " << dur.count() << " secs: " << merr.server_message() << std::endl;
success.store(false);
break;
}
} catch (...) {
std::cerr << "Unhandled exception caught. Read timeout failed" << std::endl;
success.store(false);
break;
}
} else {
// Normal traffic causing incr operation
// Each incr operation is either:
// * within a few ms (normal)
// * read timeout hits after 5 seconds (exception) (caused by endless wait)
// * getter hits wait timeout after 6 seconds (exception)
const boost::chrono::steady_clock::time_point get_start = boost::chrono::steady_clock::now();
try {
BlockingRetriever< boost::int64_t > incr_getter{ 6 };
client.incr("redistest:mt:testval", incr_getter.responder());
const std::optional< boost::int64_t > incr_result = incr_getter.wait_for_response();
const fsec dur = (boost::chrono::steady_clock::now() - get_start);
// Whatever that is, the retriever should have bailed with an exception after 10 seconds
// I'll treat it as an extra error and break the loop
if (dur > boost::chrono::milliseconds(6500)) {
std::cerr << "mt read or timeout failed after " << dur.count() << " secs" << std::endl;
success.store(false);
break;
}
if (!incr_result) {
std::cerr << "mt returned without a value after " << dur.count() << " secs" << std::endl;
success.store(false);
break;
} else {
if (*incr_result <= current_value) {
std::cerr << "incr result not larger than last time: " << *incr_result << " was: " << current_value << std::endl;
success.store(false);
break;
} else {
// This should be the 'normal' case
current_value = *incr_result;
}
}
} catch (const moose::mredis::redis_error &merr) {
const fsec dur = (boost::chrono::steady_clock::now() - get_start);
if (dur < boost::chrono::milliseconds(5500)) {
std::cout << "Read timeout worked OK after " << dur.count() << " secs" << std::endl;
} else {
std::cerr << "Read timeout did not work, exception after " << dur.count() << " secs: " << merr.server_message() << std::endl;
success.store(false);
break;
}
} catch (...) {
std::cerr << "Unhandled exception caught. Read timeout failed" << std::endl;
success.store(false);
break;
}
}
}
} });
}
workers.join_all();
const fsec total_duration = (boost::chrono::steady_clock::now() - total_start);
std::cout << "All threads joined after " << total_duration.count() << " seconds" << std::endl;
{
// new client for cleanup as we don't know in what state the original one is now
AsyncClient cleaner(server_ip_string);
cleaner.connect();
cleaner.del("redistest:mt:testval");
}
if (!success) {
std::cerr << "One or more threads in MT test reported an error" << std::endl;
return false;
}
return true;
}
// see if we can deal with log running operations. I use a script to simulate this
void test_long_runs() {
// test fiber wait
AsyncClient client(server_ip_string);
client.connect();
// I set some other value to have something to retrieve later
client.set("answer", "42");
const std::vector<std::string> keys{};
const std::vector<std::string> args{
"10000000000" // loops
};
const std::string time_wasting_script{
"local cnt = 42 "
"local ret = 0 "
"for i = 0,tonumber(ARGV[1]),1 do "
"cnt = cnt * i "
"cnt = cnt / 2 "
"ret = ret + cnt * i "
"end "
"return ret "
};
BlockingRetriever<boost::int64_t> rtr(1); // timeout of one second should be busted
try {
client.eval(time_wasting_script, keys, args, rtr.responder());
const std::optional<boost::int64_t> result = rtr.wait_for_response();
// I don't want to see either message but the timeout to cause an exception
if (!result) {
std::cerr << "No result from endless loop" << *result << std::endl;
} else {
std::cout << "Endless loop returned " << *result << std::endl;
}
} catch (const moose::mredis::redis_error &merr) {
std::cout << "Endless caused exception. Now try to recover the client. " << merr.server_message() << std::endl;
}
// #moep #performance
// This is not done yet. The server is now in a state that it won't accept
// anything other than treating the endless script by either killing it for forcefully shutting down the server.
// I don't know yet what and how I should implement
BlockingRetriever<boost::int64_t> dummy_getter(1); // timeout of one second should be enough
client.get("answer", dummy_getter.responder());
const std::optional<boost::int64_t> result = dummy_getter.wait_for_response();
boost::ignore_unused(result);
client.del("answer");
}
int main(int argc, char **argv) {
#ifndef _WIN32
// core dumps may be disallowed by parent of this process; change that
struct rlimit core_limits;
core_limits.rlim_cur = core_limits.rlim_max = RLIM_INFINITY;
setrlimit(RLIMIT_CORE, &core_limits);
#endif
moose::tools::init_logging();
namespace po = boost::program_options;
po::options_description desc("redis test options");
desc.add_options()
("help,h", "Print this help message")
("omit,o", "if set, long running tests such as timeouts will be omitted, otherwise (default) performed.")
("server,s", po::value<std::string>()->default_value("127.0.0.1"), "give redis server ip");
try {
po::variables_map vm;
po::store(po::parse_command_line(argc, argv, desc), vm);
po::notify(vm);
if (vm.count("help")) {
std::cout << "Behold your options!\n";
std::cout << desc << std::endl;
return EXIT_SUCCESS;
}
const bool perform_long_running_tests = !vm.count("omit");
server_ip_string = vm["server"].as<std::string>();
std::cout << "===========================================" << std::endl;
std::cout << "Testing getter and setter" << std::endl;