rabbitMQ implementation

controller/RabbitMQ.cpp

@@ -0,0 +1,91 @@
+#include "RabbitMQ.hpp"
+
+#include <amqp.h>
+#include <amqp_tcp_socket.h>
+#include <stdexcept>
+#include <cstring>
+
+namespace ZeroTier
+{
+
+RabbitMQ::RabbitMQ(MQConfig *cfg, const char *queueName)
+    : _mqc(cfg)
+    , _qName(queueName)
+    , _socket(NULL)
+    , _status(0)
+{   
+}
+
+RabbitMQ::~RabbitMQ()
+{
+    amqp_channel_close(_conn, _channel, AMQP_REPLY_SUCCESS);
+    amqp_connection_close(_conn, AMQP_REPLY_SUCCESS);
+    amqp_destroy_connection(_conn);
+}
+
+void RabbitMQ::init()
+{
+    struct timeval tval;
+    memset(&tval, 0, sizeof(struct timeval));
+    tval.tv_sec = 5;
+
+    fprintf(stderr, "Initializing RabbitMQ %s\n", _qName);
+    _conn = amqp_new_connection();
+    _socket = amqp_tcp_socket_new(_conn);
+    if (!_socket) {
+        throw std::runtime_error("Can't create socket for RabbitMQ");
+    }
+    
+    _status = amqp_socket_open_noblock(_socket, _mqc->host, _mqc->port, &tval);
+    if (_status) {
+        throw std::runtime_error("Can't connect to RabbitMQ");
+    }
+    
+    amqp_rpc_reply_t r = amqp_login(_conn, "/", 0, 131072, 0, AMQP_SASL_METHOD_PLAIN,
+        _mqc->username, _mqc->password);
+    if (r.reply_type != AMQP_RESPONSE_NORMAL) {
+        throw std::runtime_error("RabbitMQ Login Error");
+    }
+
+    static int chan = 0;
+    amqp_channel_open(_conn, ++chan);
+    r = amqp_get_rpc_reply(_conn);
+    if(r.reply_type != AMQP_RESPONSE_NORMAL) {
+        throw std::runtime_error("Error opening communication channel");
+    }
+    _channel = chan;
+
+    _q = amqp_queue_declare(_conn, _channel, amqp_cstring_bytes(_qName), 0, 0, 0, 0, amqp_empty_table);
+    r = amqp_get_rpc_reply(_conn);
+    if (r.reply_type != AMQP_RESPONSE_NORMAL) {
+        throw std::runtime_error("Error declaring queue");
+    }
+
+    amqp_basic_consume(_conn, _channel, amqp_cstring_bytes(_qName), amqp_empty_bytes, 0, 1, 0, amqp_empty_table);
+    r = amqp_get_rpc_reply(_conn);
+    if (r.reply_type != AMQP_RESPONSE_NORMAL) {
+        throw std::runtime_error("Error conuming");
+    }
+    fprintf(stderr, "RabbitMQ Init OK %s\n", _qName);
+}
+
+std::string RabbitMQ::consume()
+{
+    amqp_rpc_reply_t res;
+    amqp_envelope_t envelope;
+    amqp_maybe_release_buffers(_conn);
+
+    res = amqp_consume_message(_conn, &envelope, NULL, 0);
+    if (res.reply_type != AMQP_RESPONSE_NORMAL) {
+        throw std::runtime_error("Error getting message");
+    }
+
+    std::string msg(
+        (const char*)envelope.message.body.bytes,
+        envelope.message.body.len
+    );
+    amqp_destroy_envelope(&envelope);
+    return msg;
+}
+
+}