add newrelic logging capability

src/newrelic_logger.rs

@@ -0,0 +1,36 @@
+use anyhow::Result as AnyhowResult;
+use newrelic::{App, Transaction};
+
+pub struct NewRelicLogger {
+  newrelic_api: Option<App>,
+}
+
+impl NewRelicLogger {
+  pub fn new(app_name: &str, api_key: &str) -> AnyhowResult<Self> {
+    let newrelic_api = App::new(app_name, api_key)?;
+    Ok(Self {
+      newrelic_api: Some(newrelic_api),
+    })
+  }
+
+  pub fn null_instance() -> Self {
+    Self {
+      newrelic_api: None,
+    }
+  }
+
+  pub fn try_new_or_null(app_name: &str, api_key: &str) -> Self {
+    match Self::new(app_name, api_key) {
+      Ok(instance) => instance,
+      Err(_) => Self::null_instance(),
+    }
+  }
+
+  pub fn web_transaction(&self, transaction_name: &str) -> Option<Transaction> {
+    if let Some(ref newrelic_api) = self.newrelic_api {
+      info!("Logging request to NewRelic");
+      return newrelic_api.web_transaction(transaction_name).ok();
+    }
+    None
+  }
+}