static const char *def_exchange = "amq.fanout";
static const char *def_routingkey = "collectd";
+static pthread_t *subscriber_threads = NULL;
+static size_t subscriber_threads_num = 0;
+static _Bool subscriber_threads_running = 1;
+
#define CONF(c,f) (((c)->f != NULL) ? (c)->f : def_##f)
/*
sfree (conf);
} /* }}} void camqp_config_free */
+static char *camqp_bytes_cstring (amqp_bytes_t *in) /* {{{ */
+{
+ char *ret;
+
+ if ((in == NULL) || (in->bytes == NULL))
+ return (NULL);
+
+ ret = malloc (in->len + 1);
+ if (ret == NULL)
+ return (NULL);
+
+ memcpy (ret, in->bytes, in->len);
+ ret[in->len] = 0;
+
+ return (ret);
+} /* }}} char *camqp_bytes_cstring */
+
+static _Bool camqp_is_error (camqp_config_t *conf) /* {{{ */
+{
+ amqp_rpc_reply_t r;
+
+ r = amqp_get_rpc_reply (conf->connection);
+ if (r.reply_type == AMQP_RESPONSE_NORMAL)
+ return (0);
+
+ return (1);
+} /* }}} _Bool camqp_is_error */
+
+static char *camqp_strerror (camqp_config_t *conf, /* {{{ */
+ char *buffer, size_t buffer_size)
+{
+ amqp_rpc_reply_t r;
+
+ r = amqp_get_rpc_reply (conf->connection);
+ switch (r.reply_type)
+ {
+ case AMQP_RESPONSE_NORMAL:
+ sstrncpy (buffer, "Success", sizeof (buffer));
+ break;
+
+ case AMQP_RESPONSE_NONE:
+ sstrncpy (buffer, "Missing RPC reply type", sizeof (buffer));
+ break;
+
+ case AMQP_RESPONSE_LIBRARY_EXCEPTION:
+ if (r.library_errno)
+ return (sstrerror (r.library_errno, buffer, buffer_size));
+ else
+ sstrncpy (buffer, "End of stream", sizeof (buffer));
+ break;
+
+ case AMQP_RESPONSE_SERVER_EXCEPTION:
+ if (r.reply.id == AMQP_CONNECTION_CLOSE_METHOD)
+ {
+ amqp_connection_close_t *m = r.reply.decoded;
+ char *tmp = camqp_bytes_cstring (&m->reply_text);
+ ssnprintf (buffer, buffer_size, "Server connection error %d: %s",
+ m->reply_code, tmp);
+ sfree (tmp);
+ }
+ else if (r.reply.id == AMQP_CHANNEL_CLOSE_METHOD)
+ {
+ amqp_channel_close_t *m = r.reply.decoded;
+ char *tmp = camqp_bytes_cstring (&m->reply_text);
+ ssnprintf (buffer, buffer_size, "Server channel error %d: %s",
+ m->reply_code, tmp);
+ sfree (tmp);
+ }
+ else
+ {
+ ssnprintf (buffer, buffer_size, "Server error method %#"PRIx32,
+ r.reply.id);
+ }
+ break;
+
+ default:
+ ssnprintf (buffer, buffer_size, "Unknown reply type %i",
+ (int) r.reply_type);
+ }
+
+ return (buffer);
+} /* }}} char *camqp_strerror */
+
+static int camqp_setup_queue (camqp_config_t *conf) /* {{{ */
+{
+ amqp_queue_declare_ok_t *qd_ret;
+ amqp_basic_consume_ok_t *cm_ret;
+
+ qd_ret = amqp_queue_declare (conf->connection,
+ /* channel = */ CAMQP_CHANNEL,
+ /* queue = */ (conf->queue != NULL)
+ ? amqp_cstring_bytes (conf->queue)
+ : AMQP_EMPTY_BYTES,
+ /* passive = */ 0,
+ /* durable = */ 0,
+ /* exclusive = */ 0,
+ /* auto_delete = */ 1,
+ /* arguments = */ AMQP_EMPTY_TABLE);
+ if (qd_ret == NULL)
+ {
+ ERROR ("amqp plugin: amqp_queue_declare failed.");
+ camqp_close_connection (conf);
+ return (-1);
+ }
+
+ if (conf->queue == NULL)
+ {
+ conf->queue = camqp_bytes_cstring (&qd_ret->queue);
+ if (conf->queue == NULL)
+ {
+ ERROR ("amqp plugin: camqp_bytes_cstring failed.");
+ camqp_close_connection (conf);
+ return (-1);
+ }
+
+ INFO ("amqp plugin: Created queue \"%s\".", conf->queue);
+ }
+ DEBUG ("amqp plugin: Successfully created queue \"%s\".", conf->queue);
+
+ /* bind to an exchange */
+ if (conf->exchange != NULL)
+ {
+ amqp_queue_bind_ok_t *qb_ret;
+
+ /* create the exchange */
+ if (conf->exchange_type != NULL)
+ {
+ amqp_exchange_declare_ok_t *ed_ret;
+
+ ed_ret = amqp_exchange_declare (conf->connection,
+ /* channel = */ CAMQP_CHANNEL,
+ /* exchange = */ amqp_cstring_bytes (conf->exchange),
+ /* type = */ amqp_cstring_bytes (conf->exchange_type),
+ /* passive = */ 0,
+ /* durable = */ 0,
+ /* auto_delete = */ 1,
+ /* arguments = */ AMQP_EMPTY_TABLE);
+ if ((ed_ret == NULL) && camqp_is_error (conf))
+ {
+ char errbuf[1024];
+ ERROR ("amqp plugin: amqp_exchange_declare failed: %s",
+ camqp_strerror (conf, errbuf, sizeof (errbuf)));
+ camqp_close_connection (conf);
+ return (-1);
+ }
+ }
+
+ DEBUG ("amqp plugin: queue = %s; exchange = %s; routing_key = %s;",
+ conf->queue, conf->exchange, CONF (conf, routingkey));
+
+ assert (conf->queue != NULL);
+ qb_ret = amqp_queue_bind (conf->connection,
+ /* channel = */ CAMQP_CHANNEL,
+ /* queue = */ amqp_cstring_bytes (conf->queue),
+ /* exchange = */ amqp_cstring_bytes (conf->exchange),
+#if 1
+ /* routing_key = */ amqp_cstring_bytes (CONF (conf, routingkey)),
+#else
+ /* routing_key = */ AMQP_EMPTY_BYTES,
+#endif
+ /* arguments = */ AMQP_EMPTY_TABLE);
+ if ((qb_ret == NULL) && camqp_is_error (conf))
+ {
+ char errbuf[1024];
+ ERROR ("amqp plugin: amqp_queue_bind failed: %s",
+ camqp_strerror (conf, errbuf, sizeof (errbuf)));
+ camqp_close_connection (conf);
+ return (-1);
+ }
+ } /* if (conf->exchange != NULL) */
+
+ cm_ret = amqp_basic_consume (conf->connection,
+ /* channel = */ CAMQP_CHANNEL,
+ /* queue = */ amqp_cstring_bytes (conf->queue),
+ /* consumer_tag = */ AMQP_EMPTY_BYTES,
+ /* no_local = */ 0,
+ /* no_ack = */ 1,
+ /* exclusive = */ 0);
+ if ((cm_ret == NULL) && camqp_is_error (conf))
+ {
+ char errbuf[1024];
+ ERROR ("amqp plugin: amqp_basic_consume failed: %s",
+ camqp_strerror (conf, errbuf, sizeof (errbuf)));
+ camqp_close_connection (conf);
+ return (-1);
+ }
+
+ return (0);
+} /* }}} int camqp_setup_queue */
+
static int camqp_connect (camqp_config_t *conf) /* {{{ */
{
amqp_rpc_reply_t reply;
INFO ("amqp plugin: Successfully opened connection to vhost \"%s\" "
"on %s:%i.", CONF(conf, vhost), CONF(conf, host), conf->port);
+
+ if (!conf->publish)
+ return (camqp_setup_queue (conf));
return (0);
} /* }}} int camqp_connect */
+static int camqp_read_body (camqp_config_t *conf, /* {{{ */
+ size_t body_size)
+{
+ char body[body_size + 1];
+ char *body_ptr;
+ size_t received;
+ amqp_frame_t frame;
+ int status;
+
+ memset (body, 0, sizeof (body));
+ body_ptr = &body[0];
+ received = 0;
+
+ while (received < body_size)
+ {
+ status = amqp_simple_wait_frame (conf->connection, &frame);
+ if (status < 0)
+ {
+ char errbuf[1024];
+ status = (-1) * status;
+ ERROR ("amqp plugin: amqp_simple_wait_frame failed: %s",
+ sstrerror (status, errbuf, sizeof (errbuf)));
+ camqp_close_connection (conf);
+ return (status);
+ }
+
+ if (frame.frame_type != AMQP_FRAME_BODY)
+ {
+ NOTICE ("amqp plugin: Unexpected frame type: %#"PRIx8,
+ frame.frame_type);
+ return (-1);
+ }
+
+ if ((body_size - received) < frame.payload.body_fragment.len)
+ {
+ WARNING ("amqp plugin: Body is larger than indicated by header.");
+ return (-1);
+ }
+
+ memcpy (body_ptr, frame.payload.body_fragment.bytes,
+ frame.payload.body_fragment.len);
+ body_ptr += frame.payload.body_fragment.len;
+ received += frame.payload.body_fragment.len;
+ } /* while (received < body_size) */
+
+ DEBUG ("amqp plugin: camqp_read_body: body = %s", body);
+
+ return (0);
+} /* }}} int camqp_read_body */
+
+static int camqp_read_header (camqp_config_t *conf) /* {{{ */
+{
+ int status;
+ amqp_frame_t frame;
+
+ status = amqp_simple_wait_frame (conf->connection, &frame);
+ if (status < 0)
+ {
+ char errbuf[1024];
+ status = (-1) * status;
+ ERROR ("amqp plugin: amqp_simple_wait_frame failed: %s",
+ sstrerror (status, errbuf, sizeof (errbuf)));
+ camqp_close_connection (conf);
+ return (status);
+ }
+
+ if (frame.frame_type != AMQP_FRAME_HEADER)
+ {
+ NOTICE ("amqp plugin: Unexpected frame type: %#"PRIx8,
+ frame.frame_type);
+ return (-1);
+ }
+
+ return (camqp_read_body (conf, frame.payload.properties.body_size));
+} /* }}} int camqp_read_header */
+
+static void *camqp_subscribe_thread (void *user_data) /* {{{ */
+{
+ camqp_config_t *conf = user_data;
+ int status;
+
+ while (subscriber_threads_running)
+ {
+ amqp_frame_t frame;
+
+ status = camqp_connect (conf);
+ if (status != 0)
+ {
+ ERROR ("amqp plugin: camqp_connect failed. "
+ "Will sleep for %i seconds.", interval_g);
+ sleep (interval_g);
+ continue;
+ }
+
+ status = amqp_simple_wait_frame (conf->connection, &frame);
+ if (status < 0)
+ {
+ ERROR ("amqp plugin: amqp_simple_wait_frame failed. "
+ "Will sleep for %i seconds.", interval_g);
+ camqp_close_connection (conf);
+ sleep (interval_g);
+ continue;
+ }
+
+ if (frame.frame_type != AMQP_FRAME_METHOD)
+ {
+ DEBUG ("amqp plugin: Unexpected frame type: %#"PRIx8,
+ frame.frame_type);
+ continue;
+ }
+
+ if (frame.payload.method.id != AMQP_BASIC_DELIVER_METHOD)
+ {
+ DEBUG ("amqp plugin: Unexpected method id: %#"PRIx32,
+ frame.payload.method.id);
+ continue;
+ }
+
+ status = camqp_read_header (conf);
+
+ amqp_maybe_release_buffers (conf->connection);
+ } /* while (subscriber_threads_running) */
+
+ camqp_config_free (conf);
+ pthread_exit (NULL);
+} /* }}} void *camqp_subscribe_thread */
+
+static int camqp_subscribe_init (camqp_config_t *conf) /* {{{ */
+{
+ int status;
+ pthread_t *tmp;
+
+ tmp = realloc (subscriber_threads,
+ sizeof (*subscriber_threads) * (subscriber_threads_num + 1));
+ if (tmp == NULL)
+ {
+ ERROR ("amqp plugin: realloc failed.");
+ camqp_config_free (conf);
+ return (ENOMEM);
+ }
+ subscriber_threads = tmp;
+ tmp = subscriber_threads + subscriber_threads_num;
+ memset (tmp, 0, sizeof (*tmp));
+
+ status = pthread_create (tmp, /* attr = */ NULL,
+ camqp_subscribe_thread, conf);
+ if (status != 0)
+ {
+ char errbuf[1024];
+ ERROR ("amqp plugin: pthread_create failed: %s",
+ sstrerror (status, errbuf, sizeof (errbuf)));
+ camqp_config_free (conf);
+ return (status);
+ }
+
+ subscriber_threads_num++;
+
+ return (0);
+} /* }}} int camqp_subscribe_init */
+
static int camqp_write_locked (camqp_config_t *conf, /* {{{ */
const char *buffer)
{
oconfig_item_t *child = ci->children + i;
if (strcasecmp ("Host", child->key) == 0)
- status = cf_util_get_string (ci, &conf->host);
+ status = cf_util_get_string (child, &conf->host);
else if (strcasecmp ("Port", child->key) == 0)
{
status = cf_util_get_port_number (child);
}
}
else if (strcasecmp ("VHost", child->key) == 0)
- status = cf_util_get_string (ci, &conf->vhost);
+ status = cf_util_get_string (child, &conf->vhost);
else if (strcasecmp ("User", child->key) == 0)
- status = cf_util_get_string (ci, &conf->user);
+ status = cf_util_get_string (child, &conf->user);
else if (strcasecmp ("Password", child->key) == 0)
- status = cf_util_get_string (ci, &conf->password);
+ status = cf_util_get_string (child, &conf->password);
else if (strcasecmp ("Exchange", child->key) == 0)
- status = cf_util_get_string (ci, &conf->exchange);
+ status = cf_util_get_string (child, &conf->exchange);
else if ((strcasecmp ("ExchangeType", child->key) == 0) && !publish)
- status = cf_util_get_string (ci, &conf->exchange_type);
+ status = cf_util_get_string (child, &conf->exchange_type);
else if ((strcasecmp ("Queue", child->key) == 0) && !publish)
- status = cf_util_get_string (ci, &conf->queue);
+ status = cf_util_get_string (child, &conf->queue);
else if (strcasecmp ("RoutingKey", child->key) == 0)
- status = cf_util_get_string (ci, &conf->routingkey);
+ status = cf_util_get_string (child, &conf->routingkey);
else if (strcasecmp ("Persistent", child->key) == 0)
{
_Bool tmp = 0;
- status = cf_util_get_boolean (ci, &tmp);
+ status = cf_util_get_boolean (child, &tmp);
if (tmp)
conf->delivery_mode = CAMQP_DM_PERSISTENT;
else
conf->delivery_mode = CAMQP_DM_VOLATILE;
}
else if (strcasecmp ("StoreRates", child->key) == 0)
- status = cf_util_get_boolean (ci, &conf->store_rates);
+ status = cf_util_get_boolean (child, &conf->store_rates);
else
WARNING ("amqp plugin: Ignoring unknown "
"configuration option \"%s\".", child->key);
return (status);
}
+ if (conf->exchange != NULL)
+ {
+ DEBUG ("amqp plugin: camqp_config_connection: exchange = %s;",
+ conf->exchange);
+ }
+
if (publish)
{
char cbname[128];
return (status);
}
}
+ else
+ {
+ status = camqp_subscribe_init (conf);
+ if (status != 0)
+ {
+ camqp_config_free (conf);
+ return (status);
+ }
+ }
return (0);
} /* }}} int camqp_config_connection */
if (strcasecmp ("Publish", child->key) == 0)
camqp_config_connection (child, /* publish = */ 1);
+ else if (strcasecmp ("Subscribe", child->key) == 0)
+ camqp_config_connection (child, /* publish = */ 0);
else
WARNING ("amqp plugin: Ignoring unknown config option \"%s\".",
child->key);
static int shutdown (void) /* {{{ */
{
- /* FIXME: Set a global shutdown variable here. */
+ size_t i;
+
+ DEBUG ("amqp plugin: Shutting down %zu subscriber threads.",
+ subscriber_threads_num);
+
+ subscriber_threads_running = 0;
+ for (i = 0; i < subscriber_threads_num; i++)
+ {
+ /* FIXME: Sending a signal is not very elegant here. Maybe find out how
+ * to use a timeout in the thread and check for the variable in regular
+ * intervals. */
+ pthread_kill (subscriber_threads[i], SIGTERM);
+ pthread_join (subscriber_threads[i], /* retval = */ NULL);
+ }
+
+ subscriber_threads_num = 0;
+ sfree (subscriber_threads);
+
+ DEBUG ("amqp plugin: All subscriber threads exited.");
+
return (0);
} /* }}} int shutdown */
projects / collectd.git / commitdiff