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ListenerProcessor.cpp
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ListenerProcessor.cpp
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/* Copyright (c) 2020 vesoft inc. All rights reserved.
*
* This source code is licensed under Apache 2.0 License.
*/
#include "meta/processors/listener/ListenerProcessor.h"
#include "kvstore/LogEncoder.h"
#include "meta/ActiveHostsMan.h"
DECLARE_int32(heartbeat_interval_secs);
DECLARE_uint32(expired_time_factor);
namespace nebula {
namespace meta {
void AddListenerProcessor::process(const cpp2::AddListenerReq& req) {
auto space = req.get_space_id();
CHECK_SPACE_ID_AND_RETURN(space);
folly::SharedMutex::WriteHolder holder(LockUtils::lock());
auto type = req.get_type();
const auto& hosts = req.get_hosts();
auto ret = listenerExist(space, type);
if (ret != nebula::cpp2::ErrorCode::E_LISTENER_NOT_FOUND) {
if (ret == nebula::cpp2::ErrorCode::SUCCEEDED) {
LOG(INFO) << "Add listener failed, listener already exists.";
ret = nebula::cpp2::ErrorCode::E_EXISTED;
} else {
LOG(INFO) << "Add listener failed, error: " << apache::thrift::util::enumNameSafe(ret);
}
handleErrorCode(ret);
onFinished();
return;
}
// TODO : (sky) if type is elasticsearch, need check text search service.
const auto& prefix = MetaKeyUtils::partPrefix(space);
auto iterRet = doPrefix(prefix);
if (!nebula::ok(iterRet)) {
auto retCode = nebula::error(iterRet);
LOG(INFO) << "List parts failed, error: " << apache::thrift::util::enumNameSafe(retCode);
handleErrorCode(retCode);
onFinished();
return;
}
std::vector<PartitionID> parts;
auto iter = nebula::value(iterRet).get();
while (iter->valid()) {
parts.emplace_back(MetaKeyUtils::parsePartKeyPartId(iter->key()));
iter->next();
}
std::vector<kvstore::KV> data;
for (size_t i = 0; i < parts.size(); i++) {
data.emplace_back(MetaKeyUtils::listenerKey(space, parts[i], type),
MetaKeyUtils::serializeHostAddr(hosts[i % hosts.size()]));
}
auto timeInMilliSec = time::WallClock::fastNowInMilliSec();
LastUpdateTimeMan::update(data, timeInMilliSec);
auto result = doSyncPut(std::move(data));
handleErrorCode(result);
onFinished();
}
void RemoveListenerProcessor::process(const cpp2::RemoveListenerReq& req) {
auto space = req.get_space_id();
CHECK_SPACE_ID_AND_RETURN(space);
folly::SharedMutex::WriteHolder holder(LockUtils::lock());
auto type = req.get_type();
auto ret = listenerExist(space, type);
if (ret != nebula::cpp2::ErrorCode::SUCCEEDED) {
if (ret == nebula::cpp2::ErrorCode::E_LISTENER_NOT_FOUND) {
LOG(INFO) << "Remove listener failed, listener not exists.";
} else {
LOG(INFO) << "Remove listener failed, error: " << apache::thrift::util::enumNameSafe(ret);
}
handleErrorCode(ret);
onFinished();
return;
}
const auto& prefix = MetaKeyUtils::listenerPrefix(space, type);
auto iterRet = doPrefix(prefix);
if (!nebula::ok(iterRet)) {
auto retCode = nebula::error(iterRet);
LOG(INFO) << "Remove listener failed, error: " << apache::thrift::util::enumNameSafe(retCode);
handleErrorCode(retCode);
onFinished();
return;
}
auto iter = nebula::value(iterRet).get();
auto batchHolder = std::make_unique<kvstore::BatchHolder>();
while (iter->valid()) {
auto key = iter->key();
batchHolder->remove(key.str());
iter->next();
}
auto timeInMilliSec = time::WallClock::fastNowInMilliSec();
LastUpdateTimeMan::update(batchHolder.get(), timeInMilliSec);
auto batch = encodeBatchValue(std::move(batchHolder)->getBatch());
doBatchOperation(std::move(batch));
}
void ListListenerProcessor::process(const cpp2::ListListenerReq& req) {
auto space = req.get_space_id();
CHECK_SPACE_ID_AND_RETURN(space);
folly::SharedMutex::ReadHolder holder(LockUtils::lock());
const auto& prefix = MetaKeyUtils::listenerPrefix(space);
auto iterRet = doPrefix(prefix);
if (!nebula::ok(iterRet)) {
auto retCode = nebula::error(iterRet);
LOG(INFO) << "List listener failed, error: " << apache::thrift::util::enumNameSafe(retCode);
handleErrorCode(retCode);
onFinished();
return;
}
auto activeHostsRet =
ActiveHostsMan::getActiveHosts(kvstore_,
FLAGS_heartbeat_interval_secs * FLAGS_expired_time_factor,
cpp2::HostRole::STORAGE_LISTENER);
if (!nebula::ok(activeHostsRet)) {
handleErrorCode(nebula::error(activeHostsRet));
onFinished();
return;
}
std::vector<nebula::meta::cpp2::ListenerInfo> listeners;
auto activeHosts = std::move(nebula::value(activeHostsRet));
auto iter = nebula::value(iterRet).get();
while (iter->valid()) {
cpp2::ListenerInfo listener;
listener.type_ref() = MetaKeyUtils::parseListenerType(iter->key());
listener.host_ref() = MetaKeyUtils::deserializeHostAddr(iter->val());
listener.part_id_ref() = MetaKeyUtils::parseListenerPart(iter->key());
if (std::find(activeHosts.begin(), activeHosts.end(), *listener.host_ref()) !=
activeHosts.end()) {
listener.status_ref() = cpp2::HostStatus::ONLINE;
} else {
listener.status_ref() = cpp2::HostStatus::OFFLINE;
}
listeners.emplace_back(std::move(listener));
iter->next();
}
resp_.listeners_ref() = std::move(listeners);
handleErrorCode(nebula::cpp2::ErrorCode::SUCCEEDED);
onFinished();
}
} // namespace meta
} // namespace nebula