[Factors] Integrate mqtt in trigger2

crates/factor-outbound-mqtt/src/host.rs

@@ -6,16 +6,7 @@ use spin_factor_outbound_networking::OutboundAllowedHosts;
 use spin_world::v2::mqtt::{self as v2, Connection, Error, Qos};
 use tracing::{instrument, Level};
 
-#[async_trait]
-pub trait ClientCreator: Send + Sync {
-    fn create(
-        &self,
-        address: String,
-        username: String,
-        password: String,
-        keep_alive_interval: Duration,
-    ) -> Result<Arc<dyn MqttClient>, Error>;
-}
+use crate::ClientCreator;
 
 pub struct InstanceState {
     allowed_hosts: OutboundAllowedHosts,

crates/factor-outbound-mqtt/src/lib.rs

@@ -15,7 +15,7 @@ use spin_factors::{
 use spin_world::v2::mqtt::{self as v2, Error, Qos};
 use tokio::sync::Mutex;
 
-pub use host::{ClientCreator, MqttClient};
+pub use host::MqttClient;
 
 pub struct OutboundMqttFactor {
     create_client: Arc<dyn ClientCreator>,
@@ -73,6 +73,19 @@ pub struct NetworkedMqttClient {
 const MQTT_CHANNEL_CAP: usize = 1000;
 
 impl NetworkedMqttClient {
+    /// Create a [`ClientCreator`] that creates a [`NetworkedMqttClient`].
+    pub fn creator() -> Arc<dyn ClientCreator> {
+        Arc::new(|address, username, password, keep_alive_interval| {
+            Ok(Arc::new(NetworkedMqttClient::create(
+                address,
+                username,
+                password,
+                keep_alive_interval,
+            )?) as _)
+        })
+    }
+
+    /// Create a new [`NetworkedMqttClient`] with the given address, username, password, and keep alive interval.
     pub fn create(
         address: String,
         username: String,
@@ -127,3 +140,30 @@ impl MqttClient for NetworkedMqttClient {
         Ok(())
     }
 }
+
+/// A trait for creating MQTT client.
+#[async_trait]
+pub trait ClientCreator: Send + Sync {
+    fn create(
+        &self,
+        address: String,
+        username: String,
+        password: String,
+        keep_alive_interval: Duration,
+    ) -> Result<Arc<dyn MqttClient>, Error>;
+}
+
+impl<F> ClientCreator for F
+where
+    F: Fn(String, String, String, Duration) -> Result<Arc<dyn MqttClient>, Error> + Send + Sync,
+{
+    fn create(
+        &self,
+        address: String,
+        username: String,
+        password: String,
+        keep_alive_interval: Duration,
+    ) -> Result<Arc<dyn MqttClient>, Error> {
+        self(address, username, password, keep_alive_interval)
+    }
+}

crates/runtime-config/Cargo.toml

@@ -16,6 +16,7 @@ spin-factor-key-value-spin = { path = "../factor-key-value-spin" }
 spin-factor-key-value-redis = { path = "../factor-key-value-redis" }
 spin-factor-key-value-azure = { path = "../factor-key-value-azure" }
 spin-factor-outbound-http = { path = "../factor-outbound-http" }
+spin-factor-outbound-mqtt = { path = "../factor-outbound-mqtt" }
 spin-factor-outbound-networking = { path = "../factor-outbound-networking" }
 spin-factor-outbound-redis = { path = "../factor-outbound-redis" }
 spin-factor-sqlite = { path = "../factor-sqlite" }

crates/runtime-config/src/lib.rs

@@ -4,6 +4,7 @@ use anyhow::Context as _;
 use spin_factor_key_value::runtime_config::spin::{self as key_value, MakeKeyValueStore};
 use spin_factor_key_value::{DefaultLabelResolver as _, KeyValueFactor};
 use spin_factor_outbound_http::OutboundHttpFactor;
+use spin_factor_outbound_mqtt::OutboundMqttFactor;
 use spin_factor_outbound_networking::runtime_config::spin::SpinTlsRuntimeConfig;
 use spin_factor_outbound_networking::OutboundNetworkingFactor;
 use spin_factor_outbound_redis::OutboundRedisFactor;
@@ -176,6 +177,12 @@ impl FactorRuntimeConfigSource<OutboundHttpFactor> for TomlRuntimeConfigSource<'
     }
 }
 
+impl FactorRuntimeConfigSource<OutboundMqttFactor> for TomlRuntimeConfigSource<'_> {
+    fn get_runtime_config(&mut self) -> anyhow::Result<Option<()>> {
+        Ok(None)
+    }
+}
+
 impl FactorRuntimeConfigSource<SqliteFactor> for TomlRuntimeConfigSource<'_> {
     fn get_runtime_config(&mut self) -> anyhow::Result<Option<spin_factor_sqlite::RuntimeConfig>> {
         self.sqlite.resolve_from_toml(self.table.as_ref())

crates/trigger2/Cargo.toml

@@ -21,13 +21,14 @@ spin-app = { path = "../app" }
 spin-common = { path = "../common" }
 spin-componentize = { path = "../componentize" }
 spin-core = { path = "../core" }
+spin-factor-key-value = { path = "../factor-key-value" }
 spin-factor-outbound-http = { path = "../factor-outbound-http" }
+spin-factor-outbound-mqtt = { path = "../factor-outbound-mqtt" }
 spin-factor-outbound-networking = { path = "../factor-outbound-networking" }
+spin-factor-outbound-redis = { path = "../factor-outbound-redis" }
+spin-factor-sqlite = { path = "../factor-sqlite" }
 spin-factor-variables = { path = "../factor-variables" }
 spin-factor-wasi = { path = "../factor-wasi" }
-spin-factor-key-value = { path = "../factor-key-value" }
-spin-factor-sqlite = { path = "../factor-sqlite" }
-spin-factor-outbound-redis = { path = "../factor-outbound-redis" }
 spin-factors = { path = "../factors" }
 spin-factors-executor = { path = "../factors-executor" }
 spin-telemetry = { path = "../telemetry" }

crates/trigger2/src/factors.rs

@@ -2,6 +2,7 @@ use std::path::PathBuf;
 
 use spin_factor_key_value::KeyValueFactor;
 use spin_factor_outbound_http::OutboundHttpFactor;
+use spin_factor_outbound_mqtt::{NetworkedMqttClient, OutboundMqttFactor};
 use spin_factor_outbound_networking::OutboundNetworkingFactor;
 use spin_factor_outbound_redis::OutboundRedisFactor;
 use spin_factor_sqlite::SqliteFactor;
@@ -19,6 +20,7 @@ pub struct TriggerFactors {
     pub outbound_http: OutboundHttpFactor,
     pub sqlite: SqliteFactor,
     pub redis: OutboundRedisFactor,
+    pub mqtt: OutboundMqttFactor,
 }
 
 impl TriggerFactors {
@@ -37,6 +39,7 @@ impl TriggerFactors {
             outbound_http: OutboundHttpFactor,
             sqlite: SqliteFactor::new(default_sqlite_label_resolver),
             redis: OutboundRedisFactor::new(),
+            mqtt: OutboundMqttFactor::new(NetworkedMqttClient::creator()),
         }
     }
 }