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#include <chrono>
#include <Storages/MergeTree/RequestResponse.h>
#include <Core/ProtocolDefines.h>
#include <Common/SipHash.h>
#include <IO/VarInt.h>
#include <IO/WriteHelpers.h>
#include <IO/ReadHelpers.h>
#include <consistent_hashing.h>
namespace DB
{
namespace ErrorCodes
{
extern const int UNKNOWN_PROTOCOL;
extern const int UNKNOWN_ELEMENT_OF_ENUM;
}
namespace
{
CoordinationMode validateAndGet(uint8_t candidate)
{
if (candidate <= static_cast<uint8_t>(CoordinationMode::MAX))
return static_cast<CoordinationMode>(candidate);
throw Exception(ErrorCodes::UNKNOWN_ELEMENT_OF_ENUM, "Unknown reading mode: {}", candidate);
}
}
void ParallelReadRequest::serialize(WriteBuffer & out) const
{
UInt64 version = DBMS_PARALLEL_REPLICAS_PROTOCOL_VERSION;
/// Must be the first
writeIntBinary(version, out);
writeIntBinary(mode, out);
writeIntBinary(replica_num, out);
writeIntBinary(min_number_of_marks, out);
description.serialize(out);
}
String ParallelReadRequest::describe() const
{
String result;
result += fmt::format("replica_num: {} \n", replica_num);
result += fmt::format("min_num_of_marks: {} \n", min_number_of_marks);
result += description.describe();
return result;
}
ParallelReadRequest ParallelReadRequest::deserialize(ReadBuffer & in)
{
UInt64 version;
readIntBinary(version, in);
if (version != DBMS_PARALLEL_REPLICAS_PROTOCOL_VERSION)
throw Exception(ErrorCodes::UNKNOWN_PROTOCOL, "Protocol versions for parallel reading "\
"from replicas differ. Got: {}, supported version: {}",
version, DBMS_PARALLEL_REPLICAS_PROTOCOL_VERSION);
CoordinationMode mode;
size_t replica_num;
size_t min_number_of_marks;
RangesInDataPartsDescription description;
uint8_t mode_candidate;
readIntBinary(mode_candidate, in);
mode = validateAndGet(mode_candidate);
readIntBinary(replica_num, in);
readIntBinary(min_number_of_marks, in);
description.deserialize(in);
return ParallelReadRequest(
mode,
replica_num,
min_number_of_marks,
std::move(description)
);
}
void ParallelReadRequest::merge(ParallelReadRequest & other)
{
assert(mode == other.mode);
assert(replica_num == other.replica_num);
assert(min_number_of_marks == other.min_number_of_marks);
description.merge(other.description);
}
void ParallelReadResponse::serialize(WriteBuffer & out) const
{
UInt64 version = DBMS_PARALLEL_REPLICAS_PROTOCOL_VERSION;
/// Must be the first
writeIntBinary(version, out);
writeBoolText(finish, out);
description.serialize(out);
}
String ParallelReadResponse::describe() const
{
return fmt::format("{}. Finish: {}", description.describe(), finish);
}
void ParallelReadResponse::deserialize(ReadBuffer & in)
{
UInt64 version;
readIntBinary(version, in);
if (version != DBMS_PARALLEL_REPLICAS_PROTOCOL_VERSION)
throw Exception(ErrorCodes::UNKNOWN_PROTOCOL, "Protocol versions for parallel reading " \
"from replicas differ. Got: {}, supported version: {}",
version, DBMS_PARALLEL_REPLICAS_PROTOCOL_VERSION);
readBoolText(finish, in);
description.deserialize(in);
}
void InitialAllRangesAnnouncement::serialize(WriteBuffer & out) const
{
UInt64 version = DBMS_PARALLEL_REPLICAS_PROTOCOL_VERSION;
/// Must be the first
writeIntBinary(version, out);
writeIntBinary(mode, out);
description.serialize(out);
writeIntBinary(replica_num, out);
}
String InitialAllRangesAnnouncement::describe()
{
String result;
result += description.describe();
result += fmt::format("----------\nReceived from {} replica\n", replica_num);
return result;
}
InitialAllRangesAnnouncement InitialAllRangesAnnouncement::deserialize(ReadBuffer & in)
{
UInt64 version;
readIntBinary(version, in);
if (version != DBMS_PARALLEL_REPLICAS_PROTOCOL_VERSION)
throw Exception(ErrorCodes::UNKNOWN_PROTOCOL, "Protocol versions for parallel reading " \
"from replicas differ. Got: {}, supported version: {}",
version, DBMS_PARALLEL_REPLICAS_PROTOCOL_VERSION);
CoordinationMode mode;
RangesInDataPartsDescription description;
size_t replica_num;
uint8_t mode_candidate;
readIntBinary(mode_candidate, in);
mode = validateAndGet(mode_candidate);
description.deserialize(in);
readIntBinary(replica_num, in);
return InitialAllRangesAnnouncement {
mode,
description,
replica_num
};
}
}
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