Simplify server auto-configuration

This simplifies the server-side auto-configuration as follows:

- delete svc discover abstraction (use ObjectProvider for now)
- use single AC class

spring-grpc-core/src/main/java/org/springframework/grpc/server/lifecycle/GrpcServerLifecycle.java

@@ -28,6 +28,7 @@ import java.util.concurrent.atomic.AtomicInteger;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.springframework.context.ApplicationEventPublisher;
+import org.springframework.context.ApplicationEventPublisherAware;
 import org.springframework.context.SmartLifecycle;
 import org.springframework.grpc.server.GrpcServerFactory;
 
@@ -38,8 +39,9 @@ import io.grpc.Server;
  *
  * @author Michael (yidongnan@gmail.com)
  * @author Dave Syer
+ * @author Chris Bono
  */
-public class GrpcServerLifecycle implements SmartLifecycle {
+public class GrpcServerLifecycle implements SmartLifecycle, ApplicationEventPublisherAware {
 
 	private static final Log logger = LogFactory.getLog(GrpcServerLifecycle.class);
 
@@ -49,7 +51,7 @@ public class GrpcServerLifecycle implements SmartLifecycle {
 
 	private final Duration shutdownGracePeriod;
 
-	private final ApplicationEventPublisher eventPublisher;
+	private ApplicationEventPublisher eventPublisher;
 
 	private Server server;
 
@@ -57,14 +59,10 @@ public class GrpcServerLifecycle implements SmartLifecycle {
 	 * Creates a new GrpcServerLifecycle
 	 * @param factory The server factory to use.
 	 * @param shutdownGracePeriod The time to wait for the server to gracefully shut down.
-	 * @param eventPublisher The event publisher to use.
 	 */
-	public GrpcServerLifecycle(final GrpcServerFactory factory, final Duration shutdownGracePeriod,
-			final ApplicationEventPublisher eventPublisher) {
-
+	public GrpcServerLifecycle(final GrpcServerFactory factory, final Duration shutdownGracePeriod) {
 		this.factory = requireNonNull(factory, "factory");
 		this.shutdownGracePeriod = requireNonNull(shutdownGracePeriod, "shutdownGracePeriod");
-		this.eventPublisher = eventPublisher;
 	}
 
 	@Override
@@ -107,6 +105,11 @@ public class GrpcServerLifecycle implements SmartLifecycle {
 		return this.server == null ? 0 : this.server.getPort();
 	}
 
+	@Override
+	public void setApplicationEventPublisher(ApplicationEventPublisher eventPublisher) {
+		this.eventPublisher = eventPublisher;
+	}
+
 	/**
 	 * Creates and starts the grpc server.
 	 * @throws IOException If the server is unable to bind the port.

spring-grpc-core/src/test/java/org/springframework/grpc/server/DefaultGrpcServerFactoryTests.java

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2024-2024 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.grpc.server;
+
+import org.junit.jupiter.api.Test;
+
+/**
+ * Tests for {@link DefaultGrpcServerFactory}/
+ */
+class DefaultGrpcServerFactoryTests {
+
+	@Test
+	void placeholderTest() {
+	}
+
+}