origin.cxx

/* -*- Mode: C++; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
 *   Copyright 2020-2021 Couchbase, Inc.
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 */

#include "origin.hxx"

#include "core/utils/connection_string.hxx"

#include <fmt/chrono.h>
#include <fmt/core.h>

#include <tao/json.hpp>

namespace tao::json
{

template<>
struct traits<std::chrono::milliseconds> {
    template<template<typename...> class Traits>
    static void assign(tao::json::basic_value<Traits>& v, const std::chrono::milliseconds& o)
    {
        v = fmt::format("{}", o);
    }
};

template<>
struct traits<std::chrono::nanoseconds> {
    template<template<typename...> class Traits>
    static void assign(tao::json::basic_value<Traits>& v, const std::chrono::nanoseconds& o)
    {
        v = fmt::format("{}", o);
    }
};

template<>
struct traits<couchbase::core::tls_verify_mode> {
    template<template<typename...> class Traits>
    static void assign(tao::json::basic_value<Traits>& v, const couchbase::core::tls_verify_mode& o)
    {
        switch (o) {
            case couchbase::core::tls_verify_mode::none:
                v = "none";
                break;
            case couchbase::core::tls_verify_mode::peer:
                v = "peer";
                break;
        }
    }
};

template<>
struct traits<couchbase::core::io::ip_protocol> {
    template<template<typename...> class Traits>
    static void assign(tao::json::basic_value<Traits>& v, const couchbase::core::io::ip_protocol& o)
    {
        switch (o) {
            case couchbase::core::io::ip_protocol::any:
                v = "any";
                break;
            case couchbase::core::io::ip_protocol::force_ipv4:
                v = "force_ipv4";
                break;
            case couchbase::core::io::ip_protocol::force_ipv6:
                v = "force_ipv6";
                break;
        }
    }
};

template<>
struct traits<couchbase::core::io::dns::dns_config> {
    template<template<typename...> class Traits>
    static void assign(tao::json::basic_value<Traits>& v, const couchbase::core::io::dns::dns_config& o)
    {
        v = {
            { "port", o.port() },
            { "nameserver", o.nameserver() },
            { "timeout", o.timeout() },
        };
    }
};

template<>
struct traits<couchbase::core::tracing::threshold_logging_options> {
    template<template<typename...> class Traits>
    static void assign(tao::json::basic_value<Traits>& v, const couchbase::core::tracing::threshold_logging_options& o)
    {
        v = {
            { "orphaned_emit_interval", o.orphaned_emit_interval },
            { "orphaned_sample_size", o.orphaned_sample_size },
            { "threshold_emit_interval", o.threshold_emit_interval },
            { "threshold_sample_size", o.threshold_sample_size },
            { "key_value_threshold", o.key_value_threshold },
            { "query_threshold", o.query_threshold },
            { "view_threshold", o.view_threshold },
            { "search_threshold", o.search_threshold },
            { "analytics_threshold", o.analytics_threshold },
            { "management_threshold", o.management_threshold },
        };
    }
};

template<>
struct traits<couchbase::core::metrics::logging_meter_options> {
    template<template<typename...> class Traits>
    static void assign(tao::json::basic_value<Traits>& v, const couchbase::core::metrics::logging_meter_options& o)
    {
        v = {
            { "emit_interval", o.emit_interval },
        };
    }
};

template<>
struct traits<couchbase::durability_level> {
    template<template<typename...> class Traits>
    static void assign(tao::json::basic_value<Traits>& v, const couchbase::durability_level& o)
    {
        switch (o) {
            case couchbase::durability_level::none:
                v = "none";
                break;
            case couchbase::durability_level::majority:
                v = "majority";
                break;
            case couchbase::durability_level::majority_and_persist_to_active:
                v = "majority_and_persist_to_active";
                break;
            case couchbase::durability_level::persist_to_majority:
                v = "persist_to_majority";
                break;
        }
    }
};

template<>
struct traits<couchbase::query_scan_consistency> {
    template<template<typename...> class Traits>
    static void assign(tao::json::basic_value<Traits>& v, const couchbase::query_scan_consistency& o)
    {
        switch (o) {
            case couchbase::query_scan_consistency::not_bounded:
                v = "not_bounded";
                break;
            case couchbase::query_scan_consistency::request_plus:
                v = "request_plus";
                break;
        }
    }
};

template<>
struct traits<couchbase::transactions::transactions_config::built> {
    template<template<typename...> class Traits>
    static void assign(tao::json::basic_value<Traits>& v, const couchbase::transactions::transactions_config::built& o)
    {
        v = {
            { "timeout", o.timeout },
            { "durability_level", o.level },
            {
              "query_config",
              {
                { "scan_consistency", o.query_config.scan_consistency },
              },
            },
            {
              "cleanup_config",
              {
                { "cleanup_lost_attempts", o.cleanup_config.cleanup_lost_attempts },
                { "cleanup_client_attempts", o.cleanup_config.cleanup_client_attempts },
                { "cleanup_window", o.cleanup_config.cleanup_window },
                { "collections", tao::json::empty_array },
              },
            },
        };
        if (const auto& p = o.metadata_collection; p.has_value()) {
            v["metadata_collection"] = {
                { "bucket", p.value().bucket },
                { "scope", p.value().scope },
                { "collection", p.value().collection },
            };
        }
        for (const auto& c : o.cleanup_config.collections) {
            v["cleanup_config"]["collections"].emplace_back(tao::json::value{
              { "bucket", c.bucket },
              { "scope", c.scope },
              { "collection", c.collection },
            });
        }
    }
};

} // namespace tao::json

namespace couchbase::core
{
auto
origin::to_json() const -> std::string
{
    tao::json::value json = {
        {
          "options",
          {
            { "bootstrap_timeout", options_.bootstrap_timeout },
            { "resolve_timeout", options_.resolve_timeout },
            { "connect_timeout", options_.connect_timeout },
            { "key_value_timeout", options_.key_value_timeout },
            { "key_value_durable_timeout", options_.key_value_durable_timeout },
            { "view_timeout", options_.view_timeout },
            { "query_timeout", options_.query_timeout },
            { "analytics_timeout", options_.analytics_timeout },
            { "search_timeout", options_.search_timeout },
            { "management_timeout", options_.management_timeout },
            { "enable_tls", options_.enable_tls },
            { "trust_certificate", options_.trust_certificate },
            { "enable_mutation_tokens", options_.enable_mutation_tokens },
            { "enable_tcp_keep_alive", options_.enable_tcp_keep_alive },
            { "use_ip_protocol", options_.use_ip_protocol },
            { "enable_dns_srv", options_.enable_dns_srv },
            { "dns_config", options_.dns_config },
            { "show_queries", options_.show_queries },
            { "enable_unordered_execution", options_.enable_unordered_execution },
            { "enable_clustermap_notification", options_.enable_clustermap_notification },
            { "enable_compression", options_.enable_compression },
            { "enable_tracing", options_.enable_tracing },
            { "enable_metrics", options_.enable_metrics },
            { "tcp_keep_alive_interval", options_.tcp_keep_alive_interval },
            { "config_poll_interval", options_.config_poll_interval },
            { "config_poll_floor", options_.config_poll_floor },
            { "config_idle_redial_timeout", options_.config_idle_redial_timeout },
            { "max_http_connections", options_.max_http_connections },
            { "idle_http_connection_timeout", options_.idle_http_connection_timeout },
            { "user_agent_extra", options_.user_agent_extra },
            { "dump_configuration", options_.dump_configuration },
            { "disable_mozilla_ca_certificates", options_.disable_mozilla_ca_certificates },
            { "metrics_options", options_.metrics_options },
            { "network", options_.network },
            { "tls_verify", options_.tls_verify },
            { "tracing_options", options_.tracing_options },
            { "transactions_options", options_.transactions },
          },
        },
    };
    {
        tao::json::value nodes = tao::json::empty_array;
        for (const auto& [hostname, port] : nodes_) {
            nodes.emplace_back(tao::json::value{
              { "hostname", hostname },
              { "port", port },
            });
        }
        json["bootstrap_nodes"] = nodes;
    }
    return tao::json::to_string(json);
}

bool
cluster_credentials::uses_certificate() const
{
    return !certificate_path.empty();
}
} // namespace couchbase::core

couchbase::core::origin::origin(const couchbase::core::origin& other)
  : options_(other.options_)
  , credentials_(other.credentials_)
  , nodes_(other.nodes_)
  , next_node_(nodes_.begin())
{
}
couchbase::core::origin::origin(couchbase::core::cluster_credentials auth,
                                const std::string& hostname,
                                std::uint16_t port,
                                couchbase::core::cluster_options options)
  : options_(std::move(options))
  , credentials_(std::move(auth))
  , nodes_{ { hostname, std::to_string(port) } }
  , next_node_(nodes_.begin())
{
}
couchbase::core::origin::origin(couchbase::core::cluster_credentials auth,
                                const std::string& hostname,
                                const std::string& port,
                                couchbase::core::cluster_options options)
  : options_(std::move(options))
  , credentials_(std::move(auth))
  , nodes_{ { hostname, port } }
  , next_node_(nodes_.begin())
{
}
couchbase::core::origin::origin(couchbase::core::cluster_credentials auth, const couchbase::core::utils::connection_string& connstr)
  : options_(connstr.options)
  , credentials_(std::move(auth))
{
    nodes_.reserve(connstr.bootstrap_nodes.size());
    for (const auto& node : connstr.bootstrap_nodes) {
        nodes_.emplace_back(node.address, node.port > 0 ? std::to_string(node.port) : std::to_string(connstr.default_port));
    }
    next_node_ = nodes_.begin();
}
couchbase::core::origin&
couchbase::core::origin::operator=(const couchbase::core::origin& other)
{
    if (this != &other) {
        options_ = other.options_;
        credentials_ = other.credentials_;
        nodes_ = other.nodes_;
        next_node_ = nodes_.begin();
        exhausted_ = false;
    }
    return *this;
}
const std::string&
couchbase::core::origin::username() const
{
    return credentials_.username;
}
const std::string&
couchbase::core::origin::password() const
{
    return credentials_.password;
}
const std::string&
couchbase::core::origin::certificate_path() const
{
    return credentials_.certificate_path;
}
const std::string&
couchbase::core::origin::key_path() const
{
    return credentials_.key_path;
}
std::vector<std::string>
couchbase::core::origin::get_hostnames() const
{
    std::vector<std::string> res;
    res.reserve(nodes_.size());
    for (const auto& [hostname, _] : nodes_) {
        res.emplace_back(hostname);
    }
    return res;
}
std::vector<std::string>
couchbase::core::origin::get_nodes() const
{
    std::vector<std::string> res;
    res.reserve(nodes_.size());
    for (const auto& [hostname, port] : nodes_) {
        res.emplace_back(fmt::format("\"{}:{}\"", hostname, port));
    }
    return res;
}
void
couchbase::core::origin::set_nodes(couchbase::core::origin::node_list nodes)
{
    nodes_ = std::move(nodes);
    next_node_ = nodes_.begin();
    exhausted_ = false;
}
std::pair<std::string, std::string>
couchbase::core::origin::next_address()
{
    if (exhausted_) {
        restart();
    }

    auto address = *next_node_;
    if (++next_node_ == nodes_.end()) {
        exhausted_ = true;
    }
    return address;
}
bool
couchbase::core::origin::exhausted() const
{
    return exhausted_;
}
void
couchbase::core::origin::restart()
{
    exhausted_ = false;
    next_node_ = nodes_.begin();
}
const couchbase::core::cluster_options&
couchbase::core::origin::options() const
{
    return options_;
}
couchbase::core::cluster_options&
couchbase::core::origin::options()
{
    return options_;
}
const couchbase::core::cluster_credentials&
couchbase::core::origin::credentials() const
{
    return credentials_;
}