Add websocket sample

spring-boot-samples/spring-boot-sample-websocket/src/test/java/org/springframework/boot/samples/websocket/echo/StandardClientApp.java

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+/*
+ * Copyright 2002-2013 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
+ *
+ *      http://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.boot.samples.websocket.echo;
+
+import static org.junit.Assert.assertEquals;
+
+import java.util.concurrent.CountDownLatch;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.junit.Test;
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.samples.websocket.client.GreetingService;
+import org.springframework.boot.samples.websocket.client.SimpleClientWebSocketHandler;
+import org.springframework.boot.samples.websocket.client.SimpleGreetingService;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.socket.client.WebSocketConnectionManager;
+import org.springframework.web.socket.client.endpoint.StandardWebSocketClient;
+
+public class StandardClientApp {
+
+	private static Log logger = LogFactory.getLog(StandardClientApp.class);
+
+	private static final String WS_URI = "ws://localhost:8080/echo";
+
+	@Test
+	public void runAndWait() throws Exception {
+		ApplicationContext context = SpringApplication.run(ClientConfiguration.class, "--spring.main.web_environment=false");
+		assertEquals(0, context.getBean(ClientConfiguration.class).latch.getCount());
+	}
+
+	@Configuration
+	static class ClientConfiguration implements CommandLineRunner {
+
+		private CountDownLatch latch = new CountDownLatch(1);
+
+		@Override
+		public void run(String... args) throws Exception {
+			logger.info("Waiting for response: latch=" + latch.getCount());
+			latch.await();
+			logger.info("Got response: latch=" + latch.getCount());
+		}
+
+		@Bean
+		public WebSocketConnectionManager wsConnectionManager() {
+
+			WebSocketConnectionManager manager = new WebSocketConnectionManager(client(), handler(), WS_URI);
+			manager.setAutoStartup(true);
+
+			return manager;
+		}
+
+		@Bean
+		public StandardWebSocketClient client() {
+			return new StandardWebSocketClient();
+		}
+
+		@Bean
+		public SimpleClientWebSocketHandler handler() {
+			return new SimpleClientWebSocketHandler(greetingService(), latch);
+		}
+
+		@Bean
+		public GreetingService greetingService() {
+			return new SimpleGreetingService();
+		}
+	}
+
+}