From fbb5c63c33d4b0d44a2907f908e3c4c174d663ba Mon Sep 17 00:00:00 2001
From: Alex Gleason <alex@alexgleason.me>
Date: Sun, 16 Feb 2025 11:45:08 -0600
Subject: [PATCH] metrics: make 'prefix' a variable

---
 packages/metrics/metrics.ts | 56 +++++++++++++++++++------------------
 1 file changed, 29 insertions(+), 27 deletions(-)

diff --git a/packages/metrics/metrics.ts b/packages/metrics/metrics.ts
index 7fe75a8f..0dd87b7f 100644
--- a/packages/metrics/metrics.ts
+++ b/packages/metrics/metrics.ts
@@ -1,149 +1,151 @@
 import { Counter, Gauge, Histogram } from 'prom-client';
 
+const prefix = 'ditto';
+
 export const httpRequestsCounter = new Counter({
-  name: 'ditto_http_requests_total',
+  name: `${prefix}_http_requests_total`,
   help: 'Total number of HTTP requests',
   labelNames: ['method'],
 });
 
 export const httpResponsesCounter = new Counter({
-  name: 'ditto_http_responses_total',
+  name: `${prefix}_http_responses_total`,
   help: 'Total number of HTTP responses',
   labelNames: ['method', 'path', 'status'],
 });
 
 export const httpResponseDurationHistogram = new Histogram({
-  name: 'ditto_http_response_duration_seconds',
+  name: `${prefix}_http_response_duration_seconds`,
   help: 'Histogram of HTTP response times in seconds',
   labelNames: ['method', 'path', 'status'],
 });
 
 export const streamingConnectionsGauge = new Gauge({
-  name: 'ditto_streaming_connections',
+  name: `${prefix}_streaming_connections`,
   help: 'Number of active connections to the streaming API',
 });
 
 export const streamingServerMessagesCounter = new Counter({
-  name: 'ditto_streaming_server_messages_total',
+  name: `${prefix}_streaming_server_messages_total`,
   help: 'Total number of messages sent from the streaming API',
 });
 
 export const streamingClientMessagesCounter = new Counter({
-  name: 'ditto_streaming_client_messages_total',
+  name: `${prefix}_streaming_client_messages_total`,
   help: 'Total number of messages received by the streaming API',
 });
 
 export const fetchResponsesCounter = new Counter({
-  name: 'ditto_fetch_responses_total',
+  name: `${prefix}_fetch_responses_total`,
   help: 'Total number of fetch requests',
   labelNames: ['method', 'status'],
 });
 
 export const firehoseEventsCounter = new Counter({
-  name: 'ditto_firehose_events_total',
+  name: `${prefix}_firehose_events_total`,
   help: 'Total number of Nostr events processed by the firehose',
   labelNames: ['kind'],
 });
 
 export const pipelineEventsCounter = new Counter({
-  name: 'ditto_pipeline_events_total',
+  name: `${prefix}_pipeline_events_total`,
   help: 'Total number of Nostr events processed by the pipeline',
   labelNames: ['kind'],
 });
 
 export const policyEventsCounter = new Counter({
-  name: 'ditto_policy_events_total',
+  name: `${prefix}_policy_events_total`,
   help: 'Total number of policy OK responses',
   labelNames: ['ok'],
 });
 
 export const relayEventsCounter = new Counter({
-  name: 'ditto_relay_events_total',
+  name: `${prefix}_relay_events_total`,
   help: 'Total number of EVENT messages processed by the relay',
   labelNames: ['kind'],
 });
 
 export const relayMessagesCounter = new Counter({
-  name: 'ditto_relay_messages_total',
+  name: `${prefix}_relay_messages_total`,
   help: 'Total number of Nostr messages processed by the relay',
   labelNames: ['verb'],
 });
 
 export const relayConnectionsGauge = new Gauge({
-  name: 'ditto_relay_connections',
+  name: `${prefix}_relay_connections`,
   help: 'Number of active connections to the relay',
 });
 
 export const dbQueriesCounter = new Counter({
-  name: 'ditto_db_queries_total',
+  name: `${prefix}_db_queries_total`,
   help: 'Total number of database queries',
   labelNames: ['kind'],
 });
 
 export const dbEventsCounter = new Counter({
-  name: 'ditto_db_events_total',
+  name: `${prefix}_db_events_total`,
   help: 'Total number of database inserts',
   labelNames: ['kind'],
 });
 
 export const dbPoolSizeGauge = new Gauge({
-  name: 'ditto_db_pool_size',
+  name: `${prefix}_db_pool_size`,
   help: 'Number of connections in the database pool',
 });
 
 export const dbAvailableConnectionsGauge = new Gauge({
-  name: 'ditto_db_available_connections',
+  name: `${prefix}_db_available_connections`,
   help: 'Number of available connections in the database pool',
 });
 
 export const dbQueryDurationHistogram = new Histogram({
-  name: 'ditto_db_query_duration_seconds',
+  name: `${prefix}_db_query_duration_seconds`,
   help: 'Duration of database queries',
 });
 
 export const cachedFaviconsSizeGauge = new Gauge({
-  name: 'ditto_cached_favicons_size',
+  name: `${prefix}_cached_favicons_size`,
   help: 'Number of domain favicons in cache',
 });
 
 export const cachedLnurlsSizeGauge = new Gauge({
-  name: 'ditto_cached_lnurls_size',
+  name: `${prefix}_cached_lnurls_size`,
   help: 'Number of LNURL details in cache',
 });
 
 export const cachedNip05sSizeGauge = new Gauge({
-  name: 'ditto_cached_nip05s_size',
+  name: `${prefix}_cached_nip05s_size`,
   help: 'Number of NIP-05 results in cache',
 });
 
 export const cachedLinkPreviewSizeGauge = new Gauge({
-  name: 'ditto_cached_link_previews_size',
+  name: `${prefix}_cached_link_previews_size`,
   help: 'Number of link previews in cache',
 });
 
 export const cachedTranslationsSizeGauge = new Gauge({
-  name: 'ditto_cached_translations_size',
+  name: `${prefix}_cached_translations_size`,
   help: 'Number of translated statuses in cache',
 });
 
 export const internalSubscriptionsSizeGauge = new Gauge({
-  name: 'ditto_internal_subscriptions_size',
+  name: `${prefix}_internal_subscriptions_size`,
   help: "Number of active subscriptions to Ditto's internal relay",
 });
 
 export const relayPoolRelaysSizeGauge = new Gauge({
-  name: 'ditto_relay_pool_relays_size',
+  name: `${prefix}_relay_pool_relays_size`,
   help: 'Number of relays in the relay pool',
   labelNames: ['ready_state'],
 });
 
 export const relayPoolSubscriptionsSizeGauge = new Gauge({
-  name: 'ditto_relay_pool_subscriptions_size',
+  name: `${prefix}_relay_pool_subscriptions_size`,
   help: 'Number of active subscriptions to the relay pool',
 });
 
 export const webPushNotificationsCounter = new Counter({
-  name: 'ditto_web_push_notifications_total',
+  name: `${prefix}_web_push_notifications_total`,
   help: 'Total number of Web Push notifications sent',
   labelNames: ['type'],
 });