Add quit command

src/main/java/org/springframework/shell2/Bootstrap.java

@@ -36,7 +36,7 @@ import org.springframework.shell.converters.SimpleFileConverter;
 		value = {AvailableCommandsConverter.class, SimpleFileConverter.class}))
 public class Bootstrap {
 
-	public static void main(String[] args) {
+	public static void main(String[] args) throws Exception {
 		ConfigurableApplicationContext context = SpringApplication.run(Bootstrap.class);
 		context.getBean(JLineShell.class).run();
 	}

src/main/java/org/springframework/shell2/DefaultMethodTargetResolver.java

@@ -39,7 +39,7 @@ public class DefaultMethodTargetResolver implements MethodTargetResolver {
 				ShellMethod shellMapping = method.getAnnotation(ShellMethod.class);
 				String[] keys = shellMapping.value();
 				if (keys.length == 0) {
-					keys = new String[]{method.getName()};
+					keys = new String[] {method.getName()};
 				}
 				for (String key : keys) {
 					methodTargets.put(key, new MethodTarget(method, bean, shellMapping.help()));

src/main/java/org/springframework/shell2/ExitRequest.java

@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 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.shell2;
+
+/**
+ * This exception, when thrown and caught, will ask the shell to gracefully shutdown.
+ *
+ * @author Eric Bottard
+ */
+public class ExitRequest extends RuntimeException {
+
+	private final int code;
+
+	public ExitRequest() {
+		this(0);
+	}
+
+	public ExitRequest(int code) {
+		this.code = code;
+	}
+
+	public int status() {
+		return 0;
+	}
+}

src/main/java/org/springframework/shell2/JLineShell.java

@@ -16,6 +16,8 @@
 
 package org.springframework.shell2;
 
+import java.io.Closeable;
+import java.io.IOException;
 import java.lang.reflect.Parameter;
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -123,7 +125,7 @@ public class JLineShell implements Shell {
 	}
 
 
-	public void run() {
+	public void run() throws IOException {
 		while (true) {
 			lineReader.readLine("shell:>");
 			String separator = "";
@@ -177,6 +179,12 @@ public class JLineShell implements Shell {
 				try {
 					result = ReflectionUtils.invokeMethod(methodTarget.getMethod(), methodTarget.getBean(), rawArgs);
 				}
+				catch (ExitRequest e) {
+					if (applicationContext instanceof Closeable) {
+						((Closeable)applicationContext).close();
+						System.exit(e.status());
+					}
+				}
 				catch (Exception e) {
 					result = e;
 				}

src/main/java/org/springframework/shell2/commands/Quit.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2015 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.shell2.commands;
+
+import org.springframework.shell2.ExitRequest;
+import org.springframework.shell2.ShellComponent;
+import org.springframework.shell2.ShellMethod;
+
+/**
+ * A command that terminates the running shell.
+ *
+ * @author Eric Bottard
+ */
+@ShellComponent("")
+public class Quit {
+
+	@ShellMethod(help = "Exit the shell")
+	public void quit() {
+		throw new ExitRequest();
+	}
+}