diff options
Diffstat (limited to 'exporting/pubsub/pubsub.c')
| -rw-r--r-- | exporting/pubsub/pubsub.c | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/exporting/pubsub/pubsub.c b/exporting/pubsub/pubsub.c new file mode 100644 index 0000000..336a096 --- /dev/null +++ b/exporting/pubsub/pubsub.c @@ -0,0 +1,194 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#include "pubsub.h" + +/** + * Initialize Pub/Sub connector instance + * + * @param instance an instance data structure. + * @return Returns 0 on success, 1 on failure. + */ +int init_pubsub_instance(struct instance *instance) +{ + instance->worker = pubsub_connector_worker; + + instance->start_batch_formatting = NULL; + instance->start_host_formatting = format_host_labels_json_plaintext; + instance->start_chart_formatting = NULL; + + + if (EXPORTING_OPTIONS_DATA_SOURCE(instance->config.options) == EXPORTING_SOURCE_DATA_AS_COLLECTED) + instance->metric_formatting = format_dimension_collected_json_plaintext; + else + instance->metric_formatting = format_dimension_stored_json_plaintext; + + instance->end_chart_formatting = NULL; + instance->end_host_formatting = flush_host_labels; + instance->end_batch_formatting = NULL; + + instance->prepare_header = NULL; + instance->check_response = NULL; + + instance->buffer = (void *)buffer_create(0); + if (!instance->buffer) { + error("EXPORTING: cannot create buffer for Pub/Sub exporting connector instance %s", instance->config.name); + return 1; + } + uv_mutex_init(&instance->mutex); + uv_cond_init(&instance->cond_var); + + struct pubsub_specific_data *connector_specific_data = callocz(1, sizeof(struct pubsub_specific_data)); + instance->connector_specific_data = (void *)connector_specific_data; + + struct pubsub_specific_config *connector_specific_config = + (struct pubsub_specific_config *)instance->config.connector_specific_config; + char error_message[ERROR_LINE_MAX + 1] = ""; + if (pubsub_init( + (void *)connector_specific_data, error_message, instance->config.destination, + connector_specific_config->credentials_file, connector_specific_config->project_id, + connector_specific_config->topic_id)) { + error( + "EXPORTING: Cannot initialize a Pub/Sub publisher for instance %s: %s", + instance->config.name, error_message); + return 1; + } + + return 0; +} + +/** + * Clean a PubSub connector instance + * + * @param instance an instance data structure. + */ +void clean_pubsub_instance(struct instance *instance) +{ + info("EXPORTING: cleaning up instance %s ...", instance->config.name); + + struct pubsub_specific_data *connector_specific_data = + (struct pubsub_specific_data *)instance->connector_specific_data; + pubsub_cleanup(connector_specific_data); + freez(connector_specific_data); + + buffer_free(instance->buffer); + + struct pubsub_specific_config *connector_specific_config = + (struct pubsub_specific_config *)instance->config.connector_specific_config; + freez(connector_specific_config->credentials_file); + freez(connector_specific_config->project_id); + freez(connector_specific_config->topic_id); + freez(connector_specific_config); + + info("EXPORTING: instance %s exited", instance->config.name); + instance->exited = 1; + + return; +} + +/** + * Pub/Sub connector worker + * + * Runs in a separate thread for every instance. + * + * @param instance_p an instance data structure. + */ +void pubsub_connector_worker(void *instance_p) +{ + struct instance *instance = (struct instance *)instance_p; + struct pubsub_specific_config *connector_specific_config = instance->config.connector_specific_config; + struct pubsub_specific_data *connector_specific_data = instance->connector_specific_data; + + while (!instance->engine->exit) { + struct stats *stats = &instance->stats; + char error_message[ERROR_LINE_MAX + 1] = ""; + + uv_mutex_lock(&instance->mutex); + while (!instance->data_is_ready) + uv_cond_wait(&instance->cond_var, &instance->mutex); + instance->data_is_ready = 0; + + + if (unlikely(instance->engine->exit)) { + uv_mutex_unlock(&instance->mutex); + break; + } + + // reset the monitoring chart counters + stats->received_bytes = + stats->sent_bytes = + stats->sent_metrics = + stats->lost_metrics = + stats->receptions = + stats->transmission_successes = + stats->transmission_failures = + stats->data_lost_events = + stats->lost_bytes = + stats->reconnects = 0; + + BUFFER *buffer = (BUFFER *)instance->buffer; + size_t buffer_len = buffer_strlen(buffer); + + stats->buffered_bytes = buffer_len; + + if (pubsub_add_message(instance->connector_specific_data, (char *)buffer_tostring(buffer))) { + error("EXPORTING: Instance %s: Cannot add data to a message", instance->config.name); + + stats->data_lost_events++; + stats->lost_metrics += stats->buffered_metrics; + stats->lost_bytes += buffer_len; + + goto cleanup; + } + + debug( + D_BACKEND, "EXPORTING: pubsub_publish(): project = %s, topic = %s, buffer = %zu", + connector_specific_config->project_id, connector_specific_config->topic_id, buffer_len); + + if (pubsub_publish((void *)connector_specific_data, error_message, stats->buffered_metrics, buffer_len)) { + error("EXPORTING: Instance: %s: Cannot publish a message: %s", instance->config.name, error_message); + + stats->transmission_failures++; + stats->data_lost_events++; + stats->lost_metrics += stats->buffered_metrics; + stats->lost_bytes += buffer_len; + + goto cleanup; + } + + stats->sent_bytes = buffer_len; + stats->transmission_successes++; + + size_t sent_metrics = 0, lost_metrics = 0, sent_bytes = 0, lost_bytes = 0; + + if (unlikely(pubsub_get_result( + connector_specific_data, error_message, &sent_metrics, &sent_bytes, &lost_metrics, &lost_bytes))) { + // oops! we couldn't send (all or some of the) data + error("EXPORTING: %s", error_message); + error( + "EXPORTING: failed to write data to service '%s'. Willing to write %zu bytes, wrote %zu bytes.", + instance->config.destination, lost_bytes, sent_bytes); + + stats->transmission_failures++; + stats->data_lost_events++; + stats->lost_metrics += lost_metrics; + stats->lost_bytes += lost_bytes; + } else { + stats->receptions++; + stats->sent_metrics = sent_metrics; + } + + cleanup: + send_internal_metrics(instance); + + buffer_flush(buffer); + stats->buffered_metrics = 0; + + uv_mutex_unlock(&instance->mutex); + +#ifdef UNIT_TESTING + return; +#endif + } + + clean_pubsub_instance(instance); +} |