fix: add disable env flag for consumer (#475)

config/Development.toml

@@ -102,4 +102,7 @@ base_url = "https://eu.sandbox.api-ingenico.com/"
 
 [scheduler]
 stream = "SCHEDULER_STREAM"
+
+[scheduler.consumer]
+disabled = false
 consumer_group = "SCHEDULER_GROUP"

config/config.example.toml

@@ -166,7 +166,10 @@ cards = [
 # It defines the the streams/queues name and configuration as well as event selection variables
 [scheduler]
 stream = "SCHEDULER_STREAM"
+
+[scheduler.consumer]
 consumer_group = "SCHEDULER_GROUP"
+disabled = false                   # This flag decides if the consumer should actively consume task
 
 [scheduler.producer]
 upper_fetch_limit = 0             # Upper limit for fetching entries from the redis queue (in seconds)

crates/router/src/configs/defaults.rs

@@ -82,8 +82,8 @@ impl Default for super::settings::SchedulerSettings {
     fn default() -> Self {
         Self {
             stream: "SCHEDULER_STREAM".into(),
-            consumer_group: "SCHEDULER_GROUP".into(),
             producer: super::settings::ProducerSettings::default(),
+            consumer: super::settings::ConsumerSettings::default(),
         }
     }
 }
@@ -100,6 +100,15 @@ impl Default for super::settings::ProducerSettings {
     }
 }
 
+impl Default for super::settings::ConsumerSettings {
+    fn default() -> Self {
+        Self {
+            disabled: false,
+            consumer_group: "SCHEDULER_GROUP".into(),
+        }
+    }
+}
+
 #[cfg(feature = "kv_store")]
 impl Default for super::settings::DrainerSettings {
     fn default() -> Self {

crates/router/src/configs/settings.rs

@@ -164,8 +164,8 @@ pub struct ConnectorParams {
 #[serde(default)]
 pub struct SchedulerSettings {
     pub stream: String,
-    pub consumer_group: String,
     pub producer: ProducerSettings,
+    pub consumer: ConsumerSettings,
 }
 
 #[derive(Debug, Clone, Deserialize)]
@@ -179,6 +179,13 @@ pub struct ProducerSettings {
     pub batch_size: usize,
 }
 
+#[derive(Debug, Clone, Deserialize)]
+#[serde(default)]
+pub struct ConsumerSettings {
+    pub disabled: bool,
+    pub consumer_group: String,
+}
+
 #[cfg(feature = "kv_store")]
 #[derive(Debug, Clone, Deserialize)]
 #[serde(default)]

crates/router/src/configs/validations.rs

@@ -152,7 +152,7 @@ impl super::settings::SchedulerSettings {
             ))
         })?;
 
-        when(self.consumer_group.is_default_or_empty(), || {
+        when(self.consumer.consumer_group.is_default_or_empty(), || {
             Err(ApplicationError::InvalidConfigurationValueError(
                 "scheduler consumer group must not be empty".into(),
             ))

crates/router/src/scheduler/consumer.rs

@@ -71,6 +71,12 @@ pub async fn start_consumer(
         match rx.try_recv() {
             Err(oneshot::error::TryRecvError::Empty) => {
                 interval.tick().await;
+
+                // A guard from env to disable the consumer
+                if settings.consumer.disabled {
+                    continue;
+                }
+
                 tokio::task::spawn(pt_utils::consumer_operation_handler(
                     state.clone(),
                     options.clone(),
@@ -112,7 +118,7 @@ pub async fn consumer_operations(
     settings: &settings::SchedulerSettings,
 ) -> CustomResult<(), errors::ProcessTrackerError> {
     let stream_name = settings.stream.clone();
-    let group_name = settings.consumer_group.clone();
+    let group_name = settings.consumer.consumer_group.clone();
     let consumer_name = format!("consumer_{}", Uuid::new_v4());
 
     let group_created = &mut state

crates/router/src/scheduler/utils.rs

@@ -156,7 +156,7 @@ pub fn divide_into_batches(
         .fold(Vec::new(), |mut batches, item| {
             let batch = ProcessTrackerBatch {
                 id: batch_id.clone(),
-                group_name: conf.consumer_group.clone(),
+                group_name: conf.consumer.consumer_group.clone(),
                 stream_name: conf.stream.clone(),
                 connection_name: String::new(),
                 created_time: batch_creation_time,