mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
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133 lines
2.7 KiB
C++
133 lines
2.7 KiB
C++
/* Redis node-type.
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*
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* Author: Steffen Vogel <post@steffenvogel.de>
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* SPDX-FileCopyrightText: 2014-2023 Institute for Automation of Complex Power Systems, RWTH Aachen University
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* SPDX-License-Identifier: Apache-2.0
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*/
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#pragma once
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#include <atomic>
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#include <thread>
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#include <unordered_map>
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#include <sw/redis++/redis++.h>
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#include <villas/format.hpp>
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#include <villas/node.hpp>
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#include <villas/node/config.hpp>
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#include <villas/pool.hpp>
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#include <villas/queue_signalled.h>
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#include <villas/task.hpp>
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#include <villas/timing.hpp>
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namespace villas {
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namespace node {
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enum class RedisMode { KEY, HASH, CHANNEL };
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inline std::ostream &operator<<(std::ostream &os, const enum villas::node::RedisMode &m) {
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switch (m) {
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case villas::node::RedisMode::KEY:
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os << "key";
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break;
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case villas::node::RedisMode::HASH:
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os << "hash";
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break;
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case villas::node::RedisMode::CHANNEL:
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os << "channel";
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break;
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}
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return os;
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}
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class RedisConnection {
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public:
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sw::redis::Redis context;
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protected:
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enum State { INITIALIZED, RUNNING, STOPPING };
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std::thread thread;
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std::atomic<enum State> state;
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void onMessage(const std::string &channel, const std::string &msg);
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void loop();
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std::unordered_multimap<std::string, NodeCompat *> subscriberMap;
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sw::redis::Subscriber subscriber;
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villas::Logger logger;
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public:
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RedisConnection(const sw::redis::ConnectionOptions &opts);
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static RedisConnection *get(const sw::redis::ConnectionOptions &opts);
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void start();
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void stop();
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void subscribe(NodeCompat *n, const std::string &channel);
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void unsubscribe(NodeCompat *n, const std::string &channel);
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};
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struct redis {
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sw::redis::ConnectionOptions options;
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RedisConnection *conn;
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enum RedisMode mode;
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std::string key;
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bool notify; // Use Redis Keyspace notifications to listen for updates.
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struct Task task; // Timer for periodic events.
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double
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rate; // Rate for polling key updates if keyspace notifications are disabled.
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Format *formatter;
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struct Pool pool;
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struct CQueueSignalled queue;
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};
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int redis_init(NodeCompat *n);
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int redis_destroy(NodeCompat *n);
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int redis_parse(NodeCompat *n, json_t *json);
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char *redis_print(NodeCompat *n);
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int redis_check(NodeCompat *n);
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int redis_prepare(NodeCompat *n);
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int redis_start(NodeCompat *n);
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int redis_stop(NodeCompat *n);
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int redis_pause(NodeCompat *n);
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int redis_resume(NodeCompat *n);
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int redis_write(NodeCompat *n, struct Sample *const smps[], unsigned cnt);
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int redis_read(NodeCompat *n, struct Sample *const smps[], unsigned cnt);
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int redis_reverse(NodeCompat *n);
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int redis_poll_fds(NodeCompat *n, int fds[]);
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int redis_netem_fds(NodeCompat *n, int fds[]);
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} // namespace node
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} // namespace villas
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