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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "configsnapshot.h"
#include <vespa/config/subscription/configsubscription.h>
#include <vespa/config/print/configdatabuffer.h>
#include <vespa/config/common/exceptions.h>
#include <vespa/config/common/misc.h>
#include <vespa/config/frt/protocol.h>
#include <vespa/vespalib/data/slime/slime.h>
#include <vespa/vespalib/stllike/asciistream.h>
using vespalib::Slime;
using vespalib::slime::Cursor;
using vespalib::slime::Inspector;
using vespalib::Memory;
namespace config {
const int64_t ConfigSnapshot::SNAPSHOT_FORMAT_VERSION = 1;
ConfigSnapshot::ConfigSnapshot()
: _valueMap(),
_generation(0) {}
ConfigSnapshot::~ConfigSnapshot() = default;
ConfigSnapshot::ConfigSnapshot(const ConfigSnapshot &rhs) = default;
ConfigSnapshot &
ConfigSnapshot::operator=(const ConfigSnapshot &rhs) {
if (&rhs != this) {
ConfigSnapshot tmp(rhs);
tmp.swap(*this);
}
return *this;
}
void
ConfigSnapshot::swap(ConfigSnapshot &rhs) {
_valueMap.swap(rhs._valueMap);
std::swap(_generation, rhs._generation);
}
ConfigSnapshot::ConfigSnapshot(const SubscriptionList &subscriptionList, int64_t generation)
: _valueMap(),
_generation(generation)
{
for (SubscriptionList::const_iterator it(subscriptionList.begin()), mt(subscriptionList.end()); it != mt; it++) {
_valueMap[(*it)->getKey()] = Value((*it)->getLastGenerationChanged(), (*it)->getConfig());
}
}
ConfigSnapshot::ConfigSnapshot(const ValueMap &valueMap, int64_t generation)
: _valueMap(valueMap),
_generation(generation) {
}
ConfigSnapshot::ValueMap::const_iterator
ConfigSnapshot::find(const ConfigKey &key) const {
ValueMap::const_iterator it(_valueMap.find(key));
if (it == _valueMap.end()) {
throw IllegalConfigKeyException("Unable to find config for key " + key.toString());
}
return it;
}
ConfigSnapshot
ConfigSnapshot::subset(const ConfigKeySet & keySet) const
{
ValueMap subSet;
for (const ConfigKey & key : keySet) {
ValueMap::const_iterator found(_valueMap.find(key));
if (found != _valueMap.end()) {
subSet[key] = found->second;
}
}
return ConfigSnapshot(subSet, _generation);
}
int64_t ConfigSnapshot::getGeneration() const { return _generation; }
size_t ConfigSnapshot::size() const { return _valueMap.size(); }
bool ConfigSnapshot::empty() const { return _valueMap.empty(); }
void
ConfigSnapshot::serialize(ConfigDataBuffer & buffer) const
{
Slime & slime(buffer.slimeObject());
Cursor & root(slime.setObject());
root.setDouble("version", SNAPSHOT_FORMAT_VERSION);
switch (SNAPSHOT_FORMAT_VERSION) {
case 1:
serializeV1(root);
break;
case 2:
serializeV2(root);
break;
default:
vespalib::asciistream ss;
ss << "Version '" << SNAPSHOT_FORMAT_VERSION << "' is not a valid version.";
throw ConfigWriteException(ss.str());
}
}
void
ConfigSnapshot::serializeV1(Cursor & root) const
{
root.setDouble("generation", _generation);
Cursor & snapshots(root.setArray("snapshots"));
for (ValueMap::const_iterator it(_valueMap.begin()), mt(_valueMap.end()); it != mt; it++) {
Cursor & snapshot(snapshots.addObject());
serializeKeyV1(snapshot.setObject("configKey"), it->first);
serializeValueV1(snapshot.setObject("configPayload"), it->second);
}
}
void
ConfigSnapshot::serializeV2(Cursor & root) const
{
root.setDouble("generation", _generation);
Cursor & snapshots(root.setArray("snapshots"));
for (ValueMap::const_iterator it(_valueMap.begin()), mt(_valueMap.end()); it != mt; it++) {
Cursor & snapshot(snapshots.addObject());
serializeKeyV1(snapshot.setObject("configKey"), it->first);
serializeValueV2(snapshot.setObject("configPayload"), it->second);
}
}
void
ConfigSnapshot::serializeKeyV1(Cursor & cursor, const ConfigKey & key) const
{
cursor.setString("configId", Memory(key.getConfigId()));
cursor.setString("defName", Memory(key.getDefName()));
cursor.setString("defNamespace", Memory(key.getDefNamespace()));
cursor.setString("defMd5", Memory(key.getDefMd5()));
Cursor & defSchema(cursor.setArray("defSchema"));
for (const vespalib::string & line : key.getDefSchema()) {
defSchema.addString(vespalib::Memory(line));
}
}
void
ConfigSnapshot::serializeValueV1(Cursor & cursor, const Value & value) const
{
cursor.setDouble("lastChanged", value.first);
value.second.serializeV1(cursor.setArray("lines"));
}
void
ConfigSnapshot::serializeValueV2(Cursor & cursor, const Value & value) const
{
cursor.setDouble("lastChanged", value.first);
cursor.setString("xxhash64", Memory(value.second.getXxhash64()));
value.second.serializeV2(cursor.setObject("payload"));
}
void
ConfigSnapshot::deserialize(const ConfigDataBuffer & buffer)
{
const Slime & slime(buffer.slimeObject());
Inspector & inspector(slime.get());
int64_t version = static_cast<int64_t>(inspector["version"].asDouble());
switch (version) {
case 1:
deserializeV1(inspector);
break;
case 2:
deserializeV2(inspector);
break;
default:
vespalib::asciistream ss;
ss << "Version '" << version << "' is not a valid version.";
throw ConfigReadException(ss.str());
}
}
void
ConfigSnapshot::deserializeV1(Inspector & root)
{
_generation = static_cast<int64_t>(root["generation"].asDouble());
Inspector & snapshots(root["snapshots"]);
for (size_t i = 0; i < snapshots.children(); i++) {
Inspector & snapshot(snapshots[i]);
ConfigKey key(deserializeKeyV1(snapshot["configKey"]));
Value value(deserializeValueV1(snapshot["configPayload"]));
_valueMap[key] = value;
}
}
void
ConfigSnapshot::deserializeV2(Inspector & root)
{
_generation = static_cast<int64_t>(root["generation"].asDouble());
Inspector & snapshots(root["snapshots"]);
for (size_t i = 0; i < snapshots.children(); i++) {
Inspector & snapshot(snapshots[i]);
ConfigKey key(deserializeKeyV1(snapshot["configKey"]));
Value value(deserializeValueV2(snapshot["configPayload"]));
_valueMap[key] = value;
}
}
ConfigKey
ConfigSnapshot::deserializeKeyV1(Inspector & inspector) const
{
StringVector schema;
Inspector & s(inspector["defSchema"]);
for (size_t i = 0; i < s.children(); i++) {
schema.push_back(s[i].asString().make_string());
}
return ConfigKey(inspector["configId"].asString().make_string(),
inspector["defName"].asString().make_string(),
inspector["defNamespace"].asString().make_string(),
inspector["defMd5"].asString().make_string(),
schema);
}
std::pair<int64_t, ConfigValue>
ConfigSnapshot::deserializeValueV1(Inspector & inspector) const
{
StringVector payload;
int64_t lastChanged = static_cast<int64_t>(inspector["lastChanged"].asDouble());
Inspector & s(inspector["lines"]);
for (size_t i = 0; i < s.children(); i++) {
payload.push_back(s[i].asString().make_string());
}
return Value(lastChanged, ConfigValue(payload));
}
namespace {
class FixedPayload : public protocol::Payload {
public:
const Inspector & getSlimePayload() const override {
return _data.get();
}
Slime & getData() { return _data; }
~FixedPayload() override;
private:
Slime _data;
};
FixedPayload::~FixedPayload() = default;
}
std::pair<int64_t, ConfigValue>
ConfigSnapshot::deserializeValueV2(Inspector & inspector) const
{
int64_t lastChanged = static_cast<int64_t>(inspector["lastChanged"].asDouble());
vespalib::string xxhash64(inspector["xxhash64"].asString().make_string());
auto payload = std::make_unique<FixedPayload>();
copySlimeObject(inspector["payload"], payload->getData().setObject());
return Value(lastChanged, ConfigValue(std::move(payload), xxhash64));
}
}
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