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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "exceptions.h"
#include "metrics.h"
#include "proto_converter.h"
#include "rpc_forwarder.h"
#include <vespa/log/exceptions.h>
#include <vespa/vespalib/util/buffer.h>
#include <vespa/vespalib/util/stringfmt.h>
#include <vespa/fnet/frt/rpcrequest.h>
#include <vespa/fnet/frt/supervisor.h>
#include <vespa/log/log.h>
LOG_SETUP(".logd.rpc_forwarder");
using ns_log::BadLogLineException;
using ns_log::LogMessage;
using vespalib::make_string;
namespace logdemon {
namespace {
class GuardedRequest {
private:
FRT_RPCRequest* _request;
public:
GuardedRequest()
: _request(new FRT_RPCRequest())
{}
~GuardedRequest() {
_request->internal_subref();
}
FRT_RPCRequest& operator*() const { return *_request; }
FRT_RPCRequest* get() const { return _request; }
FRT_RPCRequest* operator->() const { return get(); }
};
}
void
RpcForwarder::ping_logserver()
{
GuardedRequest request;
request->SetMethodName("frt.rpc.ping");
_target->InvokeSync(request.get(), _rpc_timeout_secs);
if (!request->CheckReturnTypes("")) {
auto error_msg = make_string("Error in rpc ping to logserver ('%s'): '%s'",
_connection_spec.c_str(), request->GetErrorMessage());
LOG(debug, "%s", error_msg.c_str());
throw ConnectionException(error_msg);
}
}
RpcForwarder::RpcForwarder(Metrics& metrics, const ForwardMap& forward_filter, FRT_Supervisor& supervisor,
const vespalib::string &hostname, int rpc_port,
double rpc_timeout_secs, size_t max_messages_per_request)
: _metrics(metrics),
_connection_spec(make_string("tcp/%s:%d", hostname.c_str(), rpc_port)),
_rpc_timeout_secs(rpc_timeout_secs),
_max_messages_per_request(max_messages_per_request),
_target(supervisor.GetTarget(_connection_spec.c_str())),
_messages(),
_bad_lines(0),
_forward_filter(forward_filter)
{
ping_logserver();
}
RpcForwarder::~RpcForwarder() = default;
namespace {
void
encode_log_request(const ProtoConverter::ProtoLogRequest& src, FRT_RPCRequest& dst)
{
dst.SetMethodName("vespa.logserver.archiveLogMessages");
auto buf = src.SerializeAsString();
auto& params = *dst.GetParams();
params.AddInt8(0); // '0' indicates no compression
params.AddInt32(buf.size());
params.AddData(buf.data(), buf.size());
}
bool
decode_log_response(FRT_RPCRequest& src, ProtoConverter::ProtoLogResponse& dst)
{
auto& values = *src.GetReturn();
uint8_t encoding = values[0]._intval8;
assert(encoding == 0); // Not using compression
uint32_t uncompressed_size = values[1]._intval32;
(void) uncompressed_size;
return dst.ParseFromArray(values[2]._data._buf, values[2]._data._len);
}
bool
should_forward_log_message(const LogMessage& message, const ForwardMap& filter)
{
auto found = filter.find(message.level());
if (found != filter.end()) {
return found->second;
}
return false;
}
}
void
RpcForwarder::forwardLine(std::string_view line)
{
LogMessage message;
try {
message.parse_log_line(line);
} catch (BadLogLineException &e) {
LOG(spam, "Skipping bad logline: %s", e.what());
++_bad_lines;
return;
}
_metrics.countLine(ns_log::Logger::logLevelNames[message.level()], message.service());
if (should_forward_log_message(message, _forward_filter)) {
_messages.push_back(std::move(message));
if (_messages.size() == _max_messages_per_request) {
flush();
}
}
}
void
RpcForwarder::flush()
{
if (_messages.empty()) {
return;
}
ProtoConverter::ProtoLogRequest proto_request;
ProtoConverter::log_messages_to_proto(_messages, proto_request);
GuardedRequest request;
encode_log_request(proto_request, *request);
_target->InvokeSync(request.get(), _rpc_timeout_secs);
if (!request->CheckReturnTypes("bix")) {
auto error_msg = make_string("Error in rpc reply from logserver ('%s'): '%s'",
_connection_spec.c_str(), request->GetErrorMessage());
LOG(debug, "%s", error_msg.c_str());
throw ConnectionException(error_msg);
}
ProtoConverter::ProtoLogResponse proto_response;
if (!decode_log_response(*request, proto_response)) {
auto error_msg = make_string("Error during decoding of protobuf response from logserver ('%s')", _connection_spec.c_str());
LOG(warning, "%s", error_msg.c_str());
throw DecodeException(error_msg);
}
_messages.clear();
}
int
RpcForwarder::badLines() const
{
return _bad_lines;
}
void
RpcForwarder::resetBadLines()
{
_bad_lines = 0;
}
}
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