556 lines
18 KiB
C++
556 lines
18 KiB
C++
#include <memory>
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#include "etcd/Client.hpp"
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#include "v3/include/AsyncTxnResponse.hpp"
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#include "v3/include/AsyncRangeResponse.hpp"
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#include "v3/include/AsyncDelResponse.hpp"
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#include "v3/include/AsyncModifyResponse.hpp"
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#include <iostream>
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using grpc::Channel;
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using etcdserverpb::PutRequest;
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using etcdserverpb::RangeRequest;
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using etcdserverpb::TxnRequest;
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using etcdserverpb::DeleteRangeRequest;
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using etcdserverpb::Compare;
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using etcdserverpb::RequestOp;
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using grpc::ClientReaderWriter;
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using etcdserverpb::WatchRequest;
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using etcdserverpb::WatchResponse;
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using etcdserverpb::WatchCreateRequest;
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etcd::Client::Client(std::string const & address)
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: client(address), grpcClient(address)
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{
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std::string stripped_address(address);
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std::string substr("http://");
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std::string::size_type i = stripped_address.find(substr);
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if(i != std::string::npos)
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{
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stripped_address.erase(i,substr.length());
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}
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std::shared_ptr<Channel> channel = grpc::CreateChannel(stripped_address, grpc::InsecureChannelCredentials());
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stub_= KV::NewStub(channel);
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stub1_= Watch::NewStub(channel);
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}
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pplx::task<etcd::Response> etcd::Client::send_get_request(web::http::uri_builder & uri)
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{
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return Response::create(client.request(web::http::methods::GET, uri.to_string()));
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}
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pplx::task<etcd::Response> etcd::Client::send_del_request(web::http::uri_builder & uri)
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{
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return Response::create(client.request(web::http::methods::DEL, uri.to_string()));
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}
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pplx::task<etcd::Response> etcd::Client::send_put_request(web::http::uri_builder & uri, std::string const & key, std::string const & value)
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{
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std::string data = key + "=" + value;
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std::string content_type = "application/x-www-form-urlencoded; param=" + key;
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return Response::create(client.request(web::http::methods::PUT, uri.to_string(), data.c_str(), content_type.c_str()));
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}
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pplx::task<etcd::Response> etcd::Client::get(std::string const & key)
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{
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return send_asyncget(key);
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}
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pplx::task<etcd::Response> etcd::Client::set(std::string const & key, std::string const & value)
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{
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return send_asyncput(key,value);
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}
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pplx::task<etcd::Response> etcd::Client::add(std::string const & key, std::string const & value)
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{
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return send_asyncadd(key,value);
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}
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pplx::task<etcd::Response> etcd::Client::modify(std::string const & key, std::string const & value)
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{
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return send_asyncmodify(key,value);
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}
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pplx::task<etcd::Response> etcd::Client::modify_if(std::string const & key, std::string const & value, std::string const & old_value)
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{
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return send_asyncmodify_if(key, value, old_value);
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}
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pplx::task<etcd::Response> etcd::Client::modifyEntryWithValueAndOldIndex(std::string const & key, std::string const & value, int old_index) {
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etcdv3::AsyncRangeResponse* resp = etcdv3::Utils::getKey(key, grpcClient);
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if(!resp->reply.kvs_size())
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{
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resp->error_code=100;
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resp->error_message="Key not found";
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return Response::createResponse(*resp);
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}
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else if(resp->reply.kvs(0).mod_revision() != old_index)
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{
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resp->error_code = 101;
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resp->error_message = "Compare failed";
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return Response::createResponse(*resp);
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}
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PutRequest put_request;
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put_request.set_key(key);
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put_request.set_value(value);
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etcdv3::AsyncModifyResponse* call= new etcdv3::AsyncModifyResponse("compareAndSwap");
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//below 2 lines can be removed once we are able to use Txn
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call->prev_value = resp->reply.kvs(0);
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call->client = &grpcClient;
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call->key = key;
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call->rpcInstance = grpcClient.stub_->AsyncPut(&call->context,put_request,&call->cq_);
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call->rpcInstance->Finish(&call->putResponse, &call->status, (void*)call);
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return Response::create(call);
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}
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pplx::task<etcd::Response> etcd::Client::modify_if(std::string const & key, std::string const & value, int old_index)
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{
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return modifyEntryWithValueAndOldIndex(key, value, old_index);
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}
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//note: this one seems to not need the parseResponse() method
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pplx::task<etcd::Response> etcd::Client::removeEntryWithKey(std::string const & entryKey) {
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etcdv3::AsyncRangeResponse* resp = etcdv3::Utils::getKey(entryKey, grpcClient);
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if(!resp->reply.kvs_size())
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{
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std::cout << "nothing to delete" << std::endl;
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resp->error_code = 100;
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resp->error_message = "Nothing to delete";
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return Response::createResponse(*resp);
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}
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etcdserverpb::DeleteRangeRequest deleteRangeRequest;
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deleteRangeRequest.set_key(entryKey);
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etcdv3::AsyncDelResponse* call = new etcdv3::AsyncDelResponse("delete");
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//mano-mano
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call->prev_value = resp->reply.kvs(0);
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call->client = &grpcClient;
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call->key = entryKey;
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call->rpcInstance = grpcClient.stub_->AsyncDeleteRange(&call->context, deleteRangeRequest, &call->cq_);
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call->rpcInstance->Finish(&call->deleteResponse, &call->status, (void*)call);
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return Response::createResponse(*call);
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}
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pplx::task<etcd::Response> etcd::Client::rm(std::string const & key)
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{
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return removeEntryWithKey(key);
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}
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pplx::task<etcd::Response> etcd::Client::removeEntryWithKeyAndValue(std::string const &entryKey, std::string const &oldValue) {
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etcdv3::AsyncRangeResponse *searchResult = etcdv3::Utils::getKey(entryKey, grpcClient);
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if(!searchResult->reply.kvs_size()) {
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searchResult->error_code = 100;
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searchResult->error_message = "Key not Found";
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return Response::createResponse(*searchResult);
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}
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else if(searchResult->reply.kvs(0).value() != oldValue) {
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searchResult->error_code = 101;
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searchResult->error_message = "Compare failed";
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return Response::createResponse(*searchResult);
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}
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etcdserverpb::DeleteRangeRequest deleteRangeRequest;
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deleteRangeRequest.set_key(entryKey);
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etcdv3::AsyncDelResponse *deleteResponseCall = new etcdv3::AsyncDelResponse("compareAndDelete");
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deleteResponseCall->prev_value = searchResult->reply.kvs(0);
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deleteResponseCall->client = &grpcClient;
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deleteResponseCall->key = entryKey;
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deleteResponseCall->rpcInstance = grpcClient.stub_->AsyncDeleteRange(&deleteResponseCall->context, deleteRangeRequest, &deleteResponseCall->cq_);
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deleteResponseCall->rpcInstance->Finish(&deleteResponseCall->deleteResponse, &deleteResponseCall->status, (void*)deleteResponseCall);
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return Response::createResponse(*deleteResponseCall);
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}
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pplx::task<etcd::Response> etcd::Client::rm_if(std::string const & key, std::string const & old_value)
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{
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return removeEntryWithKeyAndValue(key, old_value);
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}
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pplx::task<etcd::Response> etcd::Client::removeEntryWithKeyAndIndex(std::string const &entryKey, int oldIndex) {
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etcdv3::AsyncRangeResponse *searchResult = etcdv3::Utils::getKey(entryKey, grpcClient);
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if(!searchResult->reply.kvs_size()) {
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searchResult->error_code = 100;
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searchResult->error_message = "Key not Found";
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return Response::createResponse(*searchResult);
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}
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else if(searchResult->reply.kvs(0).create_revision() != oldIndex) {
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searchResult->error_code = 101;
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searchResult->error_message = "Compare failed";
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return Response::createResponse(*searchResult);
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}
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etcdserverpb::DeleteRangeRequest deleteRangeRequest;
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deleteRangeRequest.set_key(entryKey);
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etcdv3::AsyncDelResponse *deleteResponseCall = new etcdv3::AsyncDelResponse("compareAndDelete");
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deleteResponseCall->prev_value = searchResult->reply.kvs(0);
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deleteResponseCall->client = &grpcClient;
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deleteResponseCall->key = entryKey;
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deleteResponseCall->rpcInstance = grpcClient.stub_->AsyncDeleteRange(&deleteResponseCall->context, deleteRangeRequest, &deleteResponseCall->cq_);
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deleteResponseCall->rpcInstance->Finish(&deleteResponseCall->deleteResponse, &deleteResponseCall->status, (void*)deleteResponseCall);
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return Response::createResponse(*deleteResponseCall);
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}
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pplx::task<etcd::Response> etcd::Client::rm_if(std::string const & key, int old_index)
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{
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return removeEntryWithKeyAndIndex(key, old_index);
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}
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pplx::task<etcd::Response> etcd::Client::mkdir(std::string const & key)
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{
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web::http::uri_builder uri("/v2/keys" + key);
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return send_put_request(uri, "dir", "true");
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}
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pplx::task<etcd::Response> etcd::Client::rmdir(std::string const & key, bool recursive)
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{
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return send_asyncdelete(key,recursive);
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}
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pplx::task<etcd::Response> etcd::Client::ls(std::string const & key)
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{
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std::string range_end(key);
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int ascii = (int)range_end[range_end.length()-1];
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range_end.back() = ascii+1;
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return send_asyncget(key,range_end);
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}
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pplx::task<etcd::Response> etcd::Client::watch(std::string const & key, bool recursive)
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{
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web::http::uri_builder uri("/v2/keys" + key);
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uri.append_query("wait=true");
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if (recursive)
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uri.append_query("recursive=true");
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return send_get_request(uri);
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}
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pplx::task<etcd::Response> etcd::Client::watch(std::string const & key, int fromIndex, bool recursive)
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{
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web::http::uri_builder uri("/v2/keys" + key);
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uri.append_query("wait=true");
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uri.append_query("waitIndex", fromIndex);
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if (recursive)
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uri.append_query("recursive=true");
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return send_get_request(uri);
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}
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pplx::task<etcd::Response> etcd::Client::send_asyncadd(std::string const & key, std::string const & value)
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{
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//check if key is not present
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TxnRequest txn_request;
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Compare* compare = txn_request.add_compare();
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compare->set_result(Compare::CompareResult::Compare_CompareResult_EQUAL);
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compare->set_target(Compare::CompareTarget::Compare_CompareTarget_VERSION);
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compare->set_key(key);
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compare->set_version(0);
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//get key on failure
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std::unique_ptr<RangeRequest> get_request(new RangeRequest());
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get_request->set_key(key);
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RequestOp* req_failure = txn_request.add_failure();
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req_failure->set_allocated_request_range(get_request.release());
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//if success, add key and then get new value of key
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std::unique_ptr<PutRequest> put_request(new PutRequest());
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put_request->set_key(key);
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put_request->set_value(value);
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RequestOp* req_success = txn_request.add_success();
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req_success->set_allocated_request_put(put_request.release());
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get_request.reset(new RangeRequest());
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get_request->set_key(key);
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req_success = txn_request.add_success();
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req_success->set_allocated_request_range(get_request.release());
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std::shared_ptr<etcdv3::AsyncTxnResponse> call(new etcdv3::AsyncTxnResponse("create"));
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call->response_reader = stub_->AsyncTxn(&call->context,txn_request,&call->cq_);
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call->response_reader->Finish(&call->reply, &call->status, (void*)call.get());
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return Response::create(call);
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}
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pplx::task<etcd::Response> etcd::Client::send_asyncmodify_if(std::string const & key, std::string const & value, std::string const & old_value)
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{
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//check key exist
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TxnRequest txn_request;
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Compare* compare = txn_request.add_compare();
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compare->set_result(Compare::CompareResult::Compare_CompareResult_GREATER);
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compare->set_target(Compare::CompareTarget::Compare_CompareTarget_VERSION);
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compare->set_key(key);
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compare->set_version(0);
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//check key value is equal to old_value
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compare = txn_request.add_compare();
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compare->set_result(Compare::CompareResult::Compare_CompareResult_EQUAL);
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compare->set_target(Compare::CompareTarget::Compare_CompareTarget_VALUE);
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compare->set_key(key);
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compare->set_value(old_value);
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etcdv3::AsyncPutResponse* call= new etcdv3::AsyncPutResponse("compareAndSwap");
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//get key on failure
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std::unique_ptr<RangeRequest> get_request(new RangeRequest());
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get_request->set_key(key);
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RequestOp* req_failure = txn_request.add_failure();
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req_failure->set_allocated_request_range(get_request.release());
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//on success get key value then modify and get new value
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get_request.reset(new RangeRequest());
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get_request->set_key(key);
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RequestOp* req_success = txn_request.add_success();
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req_success->set_allocated_request_range(get_request.release());
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std::unique_ptr<PutRequest> put_request(new PutRequest());
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put_request->set_key(key);
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put_request->set_value(value);
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req_success = txn_request.add_success();
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req_success->set_allocated_request_put(put_request.release());
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get_request.reset(new RangeRequest());
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get_request->set_key(key);
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req_success = txn_request.add_success();
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req_success->set_allocated_request_range(get_request.release());
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std::shared_ptr<etcdv3::AsyncTxnResponse> call(new etcdv3::AsyncTxnResponse("compareAndSwap"));
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call->response_reader = stub_->AsyncTxn(&call->context,txn_request,&call->cq_);
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call->response_reader->Finish(&call->reply, &call->status, (void*)call.get());
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return Response::create(call);
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}
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pplx::task<etcd::Response> etcd::Client::send_asyncmodify(std::string const & key, std::string const & value)
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{
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//check if key is present
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TxnRequest txn_request;
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Compare* compare = txn_request.add_compare();
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compare->set_result(Compare::CompareResult::Compare_CompareResult_GREATER);
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compare->set_target(Compare::CompareTarget::Compare_CompareTarget_VERSION);
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compare->set_key(key);
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compare->set_version(0);
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//success or failure
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//get key value before modification
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std::unique_ptr<RangeRequest> get_request(new RangeRequest());
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get_request->set_key(key);
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RequestOp* req_failure = txn_request.add_failure();
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req_failure->set_allocated_request_range(get_request.release());
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get_request.reset(new RangeRequest());
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get_request->set_key(key);
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RequestOp* req_success = txn_request.add_success();
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req_success->set_allocated_request_range(get_request.release());
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//if success, modify key and then get new value of key
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std::unique_ptr<PutRequest> put_request(new PutRequest());
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put_request->set_key(key);
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put_request->set_value(value);
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req_success = txn_request.add_success();
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req_success->set_allocated_request_put(put_request.release());
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get_request.reset(new RangeRequest());
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get_request->set_key(key);
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req_success = txn_request.add_success();
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req_success->set_allocated_request_range(get_request.release());
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std::shared_ptr<etcdv3::AsyncTxnResponse> call(new etcdv3::AsyncTxnResponse("update"));
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call->response_reader = stub_->AsyncTxn(&call->context,txn_request,&call->cq_);
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call->rpcInstance->Finish(&call->putResponse, &call->status, (void*)call);
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return Response::create(call);
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}
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pplx::task<etcd::Response> etcd::Client::send_asyncget(std::string const & key, std::string const& range_end)
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{
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RangeRequest get_request;
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get_request.set_key(key);
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if(!range_end.empty())
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{
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get_request.set_range_end(range_end);
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get_request.set_sort_target(RangeRequest::SortTarget::RangeRequest_SortTarget_KEY);
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get_request.set_sort_order(RangeRequest::SortOrder::RangeRequest_SortOrder_ASCEND);
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}
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std::shared_ptr<etcdv3::AsyncRangeResponse> call(new etcdv3::AsyncRangeResponse());
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call->response_reader = stub_->AsyncRange(&call->context,get_request,&call->cq_);
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call->response_reader->Finish(&call->reply, &call->status, (void*)call.get());
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return Response::create(call);
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}
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pplx::task<etcd::Response> etcd::Client::send_asyncput(std::string const & key, std::string const & value)
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{
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//check if key is not present
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TxnRequest txn_request;
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Compare* compare = txn_request.add_compare();
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compare->set_result(Compare::CompareResult::Compare_CompareResult_EQUAL);
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compare->set_target(Compare::CompareTarget::Compare_CompareTarget_VERSION);
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compare->set_key(key);
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compare->set_version(0);
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//get key on failure, get key before put, modify and then get updated key
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std::unique_ptr<RangeRequest> get_request(new RangeRequest());
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get_request->set_key(key);
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RequestOp* req_failure = txn_request.add_failure();
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req_failure->set_allocated_request_range(get_request.release());
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std::unique_ptr<PutRequest> put_request(new PutRequest());
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put_request->set_key(key);
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put_request->set_value(value);
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req_failure = txn_request.add_failure();
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req_failure->set_allocated_request_put(put_request.release());
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get_request.reset(new RangeRequest());
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get_request->set_key(key);
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req_failure = txn_request.add_failure();
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req_failure->set_allocated_request_range(get_request.release());
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//if success, put key and then get new value of key
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put_request.reset(new PutRequest());
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put_request->set_key(key);
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put_request->set_value(value);
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RequestOp* req_success = txn_request.add_success();
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req_success->set_allocated_request_put(put_request.release());
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get_request.reset(new RangeRequest());
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get_request->set_key(key);
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req_success = txn_request.add_success();
|
|
req_success->set_allocated_request_range(get_request.release());
|
|
|
|
std::shared_ptr<etcdv3::AsyncTxnResponse> call(new etcdv3::AsyncTxnResponse("set"));
|
|
|
|
call->response_reader = stub_->AsyncTxn(&call->context,txn_request,&call->cq_);
|
|
|
|
call->response_reader->Finish(&call->reply, &call->status, (void*)call.get());
|
|
|
|
return Response::create(call);
|
|
}
|
|
|
|
pplx::task<etcd::Response> etcd::Client::send_asyncdelete(std::string const & key, bool recursive)
|
|
{
|
|
|
|
//check if key is present
|
|
TxnRequest txn_request;
|
|
Compare* compare = txn_request.add_compare();
|
|
compare->set_result(Compare::CompareResult::Compare_CompareResult_GREATER);
|
|
compare->set_target(Compare::CompareTarget::Compare_CompareTarget_VERSION);
|
|
compare->set_key(key);
|
|
compare->set_version(0);
|
|
|
|
std::string range_end(key);
|
|
if(recursive)
|
|
{
|
|
int ascii = (int)range_end[range_end.length()-1];
|
|
range_end.back() = ascii+1;
|
|
}
|
|
|
|
//if success, get key, delete
|
|
std::unique_ptr<RangeRequest> get_request(new RangeRequest());
|
|
get_request->set_key(key);
|
|
if(recursive)
|
|
{
|
|
get_request->set_range_end(range_end);
|
|
get_request->set_sort_target(RangeRequest::SortTarget::RangeRequest_SortTarget_KEY);
|
|
get_request->set_sort_order(RangeRequest::SortOrder::RangeRequest_SortOrder_ASCEND);
|
|
}
|
|
|
|
RequestOp* req_success = txn_request.add_success();
|
|
req_success->set_allocated_request_range(get_request.release());
|
|
|
|
std::unique_ptr<DeleteRangeRequest> del_request(new DeleteRangeRequest());
|
|
del_request->set_key(key);
|
|
if(recursive)
|
|
{
|
|
del_request->set_range_end(range_end);
|
|
}
|
|
|
|
req_success = txn_request.add_success();
|
|
req_success->set_allocated_request_delete_range(del_request.release());
|
|
|
|
|
|
//if success, get key, delete
|
|
get_request.reset(new RangeRequest());
|
|
get_request->set_key(key);
|
|
if(recursive)
|
|
{
|
|
get_request->set_range_end(range_end);
|
|
get_request->set_sort_target(RangeRequest::SortTarget::RangeRequest_SortTarget_KEY);
|
|
get_request->set_sort_order(RangeRequest::SortOrder::RangeRequest_SortOrder_ASCEND);
|
|
}
|
|
RequestOp* req_failure = txn_request.add_failure();
|
|
req_failure->set_allocated_request_range(get_request.release());
|
|
|
|
del_request.reset(new DeleteRangeRequest());
|
|
del_request->set_key(key);
|
|
if(recursive)
|
|
{
|
|
del_request->set_range_end(range_end);
|
|
}
|
|
|
|
req_failure = txn_request.add_failure();
|
|
req_failure->set_allocated_request_delete_range(del_request.release());
|
|
|
|
|
|
std::shared_ptr<etcdv3::AsyncTxnResponse> call(new etcdv3::AsyncTxnResponse("delete"));
|
|
|
|
call->response_reader = stub_->AsyncTxn(&call->context,txn_request,&call->cq_);
|
|
|
|
call->response_reader->Finish(&call->reply, &call->status, (void*)call.get());
|
|
|
|
return Response::create(call);
|
|
}
|
|
|
|
|