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// Copyright 2019 Oath Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include <logd/exceptions.h>
#include <logd/rpc_forwarder.h>
#include <vespa/vespalib/gtest/gtest.h>
using namespace logdemon;
void
encode_log_response(const ProtoConverter::ProtoLogResponse& src, FRT_Values& dst)
{
auto buf = src.SerializeAsString();
dst.AddInt8(0);
dst.AddInt32(buf.size());
dst.AddData(buf.data(), buf.size());
}
bool
decode_log_request(FRT_Values& src, ProtoConverter::ProtoLogRequest& dst)
{
uint8_t encoding = src[0]._intval8;
assert(encoding == 0);
uint32_t uncompressed_size = src[1]._intval32;
assert(uncompressed_size == src[2]._data._len);
return dst.ParseFromArray(src[2]._data._buf, src[2]._data._len);
}
std::string garbage("garbage");
struct RpcServer : public FRT_Invokable {
FRT_Supervisor supervisor;
int request_count;
std::vector<std::string> messages;
bool reply_with_error;
bool reply_with_proto_response;
public:
RpcServer()
: supervisor(),
request_count(0),
messages(),
reply_with_error(false),
reply_with_proto_response(true)
{
supervisor.Listen(0);
supervisor.Start();
FRT_ReflectionBuilder builder(&supervisor);
builder.DefineMethod("vespa.logserver.archiveLogMessages", "bix", "bix",
FRT_METHOD(RpcServer::rpc_archive_log_messages), this);
}
~RpcServer() {
supervisor.ShutDown(true);
}
int get_listen_port() {
return supervisor.GetListenPort();
}
void rpc_archive_log_messages(FRT_RPCRequest* request) {
ProtoConverter::ProtoLogRequest proto_request;
ASSERT_TRUE(decode_log_request(*request->GetParams(), proto_request));
++request_count;
for (const auto& message : proto_request.log_messages()) {
messages.push_back(message.payload());
}
if (reply_with_error) {
request->SetError(123, "This is a server error");
return;
}
if (reply_with_proto_response) {
ProtoConverter::ProtoLogResponse proto_response;
encode_log_response(proto_response, *request->GetReturn());
} else {
auto& dst = *request->GetReturn();
dst.AddInt8(0);
dst.AddInt32(garbage.size());
dst.AddData(garbage.data(), garbage.size());
}
}
};
std::string
make_log_line(const std::string& payload)
{
return "1234.5678\tmy_host\t10/20\tmy_service\tmy_component\tinfo\t" + payload;
}
struct RpcForwarderTest : public ::testing::Test {
RpcServer server;
RpcForwarder forwarder;
RpcForwarderTest()
: forwarder("localhost", server.get_listen_port(), 60.0, 3)
{
}
void forward_line(const std::string& payload) {
forwarder.forwardLine(make_log_line(payload));
}
void flush() {
forwarder.flush();
}
void expect_messages() {
expect_messages(0, {});
}
void expect_messages(int exp_request_count, const std::vector<std::string>& exp_messages) {
EXPECT_EQ(exp_request_count, server.request_count);
EXPECT_EQ(exp_messages, server.messages);
}
};
TEST_F(RpcForwarderTest, does_not_send_rpc_with_no_log_messages)
{
expect_messages();
flush();
expect_messages();
}
TEST_F(RpcForwarderTest, can_send_rpc_with_single_log_message)
{
forward_line("a");
expect_messages();
flush();
expect_messages(1, {"a"});
}
TEST_F(RpcForwarderTest, can_send_rpc_with_multiple_log_messages)
{
forward_line("a");
forward_line("b");
expect_messages();
flush();
expect_messages(1, {"a", "b"});
}
TEST_F(RpcForwarderTest, automatically_sends_rpc_when_max_messages_limit_is_reached)
{
forward_line("a");
forward_line("b");
expect_messages();
forward_line("c");
expect_messages(1, {"a", "b", "c"});
forward_line("d");
expect_messages(1, {"a", "b", "c"});
forward_line("e");
expect_messages(1, {"a", "b", "c"});
forward_line("f");
expect_messages(2, {"a", "b", "c", "d", "e", "f"});
}
TEST_F(RpcForwarderTest, throws_when_rpc_reply_contains_errors)
{
server.reply_with_error = true;
forward_line("a");
EXPECT_THROW(flush(), logdemon::ConnectionException);
}
TEST_F(RpcForwarderTest, throws_when_rpc_reply_does_not_contain_proto_response)
{
server.reply_with_proto_response = false;
forward_line("a");
EXPECT_THROW(flush(), logdemon::DecodeException);
}
GTEST_MAIN_RUN_ALL_TESTS()
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