From 7e63583d04f716a05be68ca2d1fd647f552e38ed Mon Sep 17 00:00:00 2001
From: Jose Gomez <k13gomez@gmail.com>
Date: Wed, 27 Aug 2025 23:23:02 -0500
Subject: [PATCH] Add Jetty options for acceptor/selector threads

---
 ring-jetty-adapter/src/ring/adapter/jetty.clj | 26 ++++++++++++-------
 .../test/ring/adapter/test/jetty.clj          | 25 +++++++++++++++++-
 2 files changed, 41 insertions(+), 10 deletions(-)

diff --git a/ring-jetty-adapter/src/ring/adapter/jetty.clj b/ring-jetty-adapter/src/ring/adapter/jetty.clj
index 07d58df2..cd076297 100644
--- a/ring-jetty-adapter/src/ring/adapter/jetty.clj
+++ b/ring-jetty-adapter/src/ring/adapter/jetty.clj
@@ -177,14 +177,20 @@
     (.setAllowNullPathInfo true)
     (JettyWebSocketServletContainerInitializer/configure nil)))
 
-(defn- server-connector ^ServerConnector [^Server server & factories]
-  (ServerConnector. server #^"[Lorg.eclipse.jetty.server.ConnectionFactory;"
-                             (into-array ConnectionFactory factories)))
+(defn- server-connector ^ServerConnector [^Server server factories options]
+  (let [acceptors (options :acceptor-threads -1)
+        selectors (options :selector-threads -1)]
+    (ServerConnector. server (int acceptors) (int selectors)
+                      ^"[Lorg.eclipse.jetty.server.ConnectionFactory;"
+                      (into-array ConnectionFactory factories))))
 
 (defn- unix-domain-server-connector ^UnixDomainServerConnector
-  [^Server server & factories]
-  (UnixDomainServerConnector. server #^"[Lorg.eclipse.jetty.server.ConnectionFactory;"
-                                       (into-array ConnectionFactory factories)))
+  [^Server server factories options]
+  (let [acceptors (options :acceptor-threads -1)
+        selectors (options :selector-threads -1)]
+    (UnixDomainServerConnector. server (int acceptors) (int selectors)
+                                ^"[Lorg.eclipse.jetty.server.ConnectionFactory;"
+                                (into-array ConnectionFactory factories))))
 
 (defn- http-config ^HttpConfiguration [options]
   (doto (HttpConfiguration.)
@@ -196,7 +202,7 @@
 
 (defn- http-connector ^ServerConnector [server options]
   (let [http-factory (HttpConnectionFactory. (http-config options))]
-    (doto (server-connector server http-factory)
+    (doto (server-connector server [http-factory] options)
       (.setPort (options :port 80))
       (.setHost (options :host))
       (.setIdleTimeout (options :max-idle-time 200000)))))
@@ -248,7 +254,7 @@
     (when-let [scan-interval (options :keystore-scan-interval)]
       (.addBean server (doto (KeyStoreScanner. ssl-context)
                          (.setScanInterval scan-interval))))
-    (doto (server-connector server ssl-factory http-factory)
+    (doto (server-connector server [ssl-factory http-factory] options)
       (.setPort ssl-port)
       (.setHost (options :host))
       (.setIdleTimeout (options :max-idle-time 200000)))))
@@ -257,7 +263,7 @@
   (let [http-factory (HttpConnectionFactory. (http-config options))
         socket (io/file (options :unix-socket))]
     (.deleteOnExit socket)
-    (doto (unix-domain-server-connector server http-factory)
+    (doto (unix-domain-server-connector server [http-factory] options)
       (.setUnixDomainPath (.toPath socket))
       (.setIdleTimeout (options :max-idle-time 200000)))))
 
@@ -328,6 +334,8 @@
   :thread-pool            - custom thread pool instance for Jetty to use
   :truststore             - a truststore to use for SSL connections
   :trust-password         - the password to the truststore
+  :acceptor-threads       - the number of acceptor threads to use
+  :selector-threads       - the number of selector threads to use
   :max-threads            - the maximum number of threads to use (default 50)
   :min-threads            - the minimum number of threads to use (default 8)
   :max-queued-requests    - the maximum number of requests to be queued
diff --git a/ring-jetty-adapter/test/ring/adapter/test/jetty.clj b/ring-jetty-adapter/test/ring/adapter/test/jetty.clj
index 02829c7a..ce08ff9c 100644
--- a/ring-jetty-adapter/test/ring/adapter/test/jetty.clj
+++ b/ring-jetty-adapter/test/ring/adapter/test/jetty.clj
@@ -126,7 +126,14 @@
                              (.send))]
             (is (= (.getStatus response) 200))
             (is (.getMediaType response) "text/plain")
-            (is (= (.getContentAsString response) "Hello World")))))))
+            (is (= (.getContentAsString response) "Hello World"))))
+        (testing "with custom connector options"
+          (let [server (run-jetty hello-world {:http? false
+                                               :unix-socket test-unix-domain-socket
+                                               :join? false
+                                               :acceptor-threads 2})]
+            (is (= 2 (-> server (.getConnectors) first (.getAcceptors))))
+            (.stop server))))))
 
   (testing "HTTPS server"
     (with-server hello-world {:port test-port
@@ -329,6 +336,22 @@
       (is (= 1000 (. thread-pool getIdleTimeout)))
       (.stop server)))
 
+  (testing "using default connector options"
+    (let [server (run-jetty hello-world {:port test-port
+                                         :join? false})]
+      (is (>= 1 (-> server (.getConnectors) first (.getAcceptors))))
+      (is (> (-> server (.getConnectors) first (.getSelectorManager) (.getSelectorCount)) 1))
+      (.stop server)))
+
+  (testing "using custom connector options"
+    (let [server (run-jetty hello-world {:port test-port
+                                         :join? false
+                                         :acceptor-threads 2
+                                         :selector-threads 8})]
+      (is (= 2 (-> server (.getConnectors) first (.getAcceptors))))
+      (is (= 8 (-> server (.getConnectors) first (.getSelectorManager) (.getSelectorCount))))
+      (.stop server)))
+
   (testing "providing custom thread-pool"
     (let [pool   (QueuedThreadPool.)
           server (run-jetty hello-world {:port test-port