Polish "Add properties for Jetty threadpool"

See gh-17871

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/ServerProperties.java

@@ -907,12 +907,12 @@ public class ServerProperties {
 		private Integer selectors = -1;
 
 		/**
-		 * Maximum amount of threads.
+		 * Maximum number of threads.
 		 */
 		private Integer maxThreads = 200;
 
 		/**
-		 * Minimum amount of threads.
+		 * Minimum number of threads.
 		 */
 		private Integer minThreads = 8;
 

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/embedded/JettyWebServerFactoryCustomizer.java

@@ -18,6 +18,7 @@ package org.springframework.boot.autoconfigure.web.embedded;
 
 import java.time.Duration;
 import java.util.Arrays;
+import java.util.function.Consumer;
 
 import org.eclipse.jetty.server.AbstractConnector;
 import org.eclipse.jetty.server.ConnectionFactory;
@@ -82,11 +83,11 @@ public class JettyWebServerFactoryCustomizer
 		propertyMapper.from(jettyProperties::getMaxHttpPostSize).asInt(DataSize::toBytes).when(this::isPositive)
 				.to((maxHttpPostSize) -> customizeMaxHttpPostSize(factory, maxHttpPostSize));
 		propertyMapper.from(jettyProperties::getMaxThreads).when(this::isPositive)
-				.to((maxThreads) -> customizeMaxThreads(factory, maxThreads));
+				.to((maxThreads) -> customizeThreadPool(factory, (threadPool) -> threadPool.setMaxThreads(maxThreads)));
 		propertyMapper.from(jettyProperties::getMinThreads).when(this::isPositive)
-				.to((minThreads) -> customizeMinThreads(factory, minThreads));
-		propertyMapper.from(jettyProperties::getIdleTimeout).when(this::isPositive)
-				.to((idleTimeout) -> customizeIdleTimeout(factory, idleTimeout));
+				.to((minThreads) -> customizeThreadPool(factory, (threadPool) -> threadPool.setMinThreads(minThreads)));
+		propertyMapper.from(jettyProperties::getIdleTimeout).when(this::isPositive).to(
+				(idleTimeout) -> customizeThreadPool(factory, (threadPool) -> threadPool.setIdleTimeout(idleTimeout)));
 		propertyMapper.from(properties::getConnectionTimeout).whenNonNull()
 				.to((connectionTimeout) -> customizeConnectionTimeout(factory, connectionTimeout));
 		propertyMapper.from(jettyProperties::getAccesslog).when(ServerProperties.Jetty.Accesslog::isEnabled)
@@ -140,29 +141,11 @@ public class JettyWebServerFactoryCustomizer
 		});
 	}
 
-	private void customizeMaxThreads(ConfigurableJettyWebServerFactory factory, int maxThreads) {
+	private void customizeThreadPool(ConfigurableJettyWebServerFactory factory, Consumer<QueuedThreadPool> customizer) {
 		factory.addServerCustomizers((connector) -> {
 			ThreadPool threadPool = connector.getThreadPool();
 			if (threadPool instanceof QueuedThreadPool) {
-				((QueuedThreadPool) threadPool).setMaxThreads(maxThreads);
-			}
-		});
-	}
-
-	private void customizeMinThreads(ConfigurableJettyWebServerFactory factory, int minThreads) {
-		factory.addServerCustomizers((connector) -> {
-			ThreadPool threadPool = connector.getThreadPool();
-			if (threadPool instanceof QueuedThreadPool) {
-				((QueuedThreadPool) threadPool).setMinThreads(minThreads);
-			}
-		});
-	}
-
-	private void customizeIdleTimeout(ConfigurableJettyWebServerFactory factory, int idleTimeout) {
-		factory.addServerCustomizers((connector) -> {
-			ThreadPool threadPool = connector.getThreadPool();
-			if (threadPool instanceof QueuedThreadPool) {
-				((QueuedThreadPool) threadPool).setIdleTimeout(idleTimeout);
+				customizer.accept((QueuedThreadPool) threadPool);
 			}
 		});
 	}

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/embedded/JettyWebServerFactoryCustomizerTests.java

@@ -28,7 +28,6 @@ import org.eclipse.jetty.server.HttpConfiguration.ConnectionFactory;
 import org.eclipse.jetty.server.RequestLog;
 import org.eclipse.jetty.server.RequestLogWriter;
 import org.eclipse.jetty.util.thread.QueuedThreadPool;
-import org.eclipse.jetty.util.thread.ThreadPool;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
@@ -116,33 +115,27 @@ class JettyWebServerFactoryCustomizerTests {
 	}
 
 	@Test
-	void maxThreadsCanBeCustomized() throws IOException {
+	void maxThreadsCanBeCustomized() {
 		bind("server.jetty.max-threads=100");
 		JettyWebServer server = customizeAndGetServer();
-		ThreadPool threadPool = server.getServer().getThreadPool();
-		if (threadPool instanceof QueuedThreadPool) {
-			assertThat(((QueuedThreadPool) threadPool).getMaxThreads()).isEqualTo(100);
-		}
+		QueuedThreadPool threadPool = (QueuedThreadPool) server.getServer().getThreadPool();
+		assertThat(threadPool.getMaxThreads()).isEqualTo(100);
 	}
 
 	@Test
-	void minThreadsCanBeCustomized() throws IOException {
+	void minThreadsCanBeCustomized() {
 		bind("server.jetty.min-threads=100");
 		JettyWebServer server = customizeAndGetServer();
-		ThreadPool threadPool = server.getServer().getThreadPool();
-		if (threadPool instanceof QueuedThreadPool) {
-			assertThat(((QueuedThreadPool) threadPool).getMinThreads()).isEqualTo(100);
-		}
+		QueuedThreadPool threadPool = (QueuedThreadPool) server.getServer().getThreadPool();
+		assertThat(threadPool.getMinThreads()).isEqualTo(100);
 	}
 
 	@Test
-	void idleTimeoutCanBeCustomized() throws IOException {
+	void idleTimeoutCanBeCustomized() {
 		bind("server.jetty.idle-timeout=100");
 		JettyWebServer server = customizeAndGetServer();
-		ThreadPool threadPool = server.getServer().getThreadPool();
-		if (threadPool instanceof QueuedThreadPool) {
-			assertThat(((QueuedThreadPool) threadPool).getIdleTimeout()).isEqualTo(100);
-		}
+		QueuedThreadPool threadPool = (QueuedThreadPool) server.getServer().getThreadPool();
+		assertThat(threadPool.getIdleTimeout()).isEqualTo(100);
 	}
 
 	private CustomRequestLog getRequestLog(JettyWebServer server) {