Add exception endpoints to tomcat-jsp sample

Update `spring-boot-sample-tomcat-jsp` to include endpoints that trigger
exceptions. Primarily to aid testing of the ErrorPageFilter.

See gh-2745

Author: philwebb

spring-boot-samples/spring-boot-sample-tomcat-jsp/src/main/java/sample/jsp/MyException.java

@@ -0,0 +1,25 @@
+/*
+ * Copyright 2012-2015 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 sample.jsp;
+
+public class MyException extends RuntimeException {
+
+	public MyException(String message) {
+		super(message);
+	}
+
+}

spring-boot-samples/spring-boot-sample-tomcat-jsp/src/main/java/sample/jsp/MyRestResponse.java

@@ -0,0 +1,31 @@
+/*
+ * Copyright 2012-2015 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 sample.jsp;
+
+public class MyRestResponse {
+
+	private String message;
+
+	public MyRestResponse(String message) {
+		this.message = message;
+	}
+
+	public String getMessage() {
+		return this.message;
+	}
+
+}

spring-boot-samples/spring-boot-sample-tomcat-jsp/src/main/java/sample/jsp/WelcomeController.java

@@ -20,8 +20,12 @@
 import java.util.Map;
 
 import org.springframework.beans.factory.annotation.Value;
+import org.springframework.http.HttpStatus;
 import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.ExceptionHandler;
 import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.ResponseBody;
+import org.springframework.web.bind.annotation.ResponseStatus;
 
 @Controller
 public class WelcomeController {
@@ -36,4 +40,20 @@ public String welcome(Map<String, Object> model) {
 		return "welcome";
 	}
 
+	@RequestMapping("/fail")
+	public String fail() {
+		throw new MyException("Oh dear!");
+	}
+
+	@RequestMapping("/fail2")
+	public String fail2() {
+		throw new IllegalStateException();
+	}
+
+	@ExceptionHandler(MyException.class)
+	@ResponseStatus(HttpStatus.BAD_REQUEST)
+	public @ResponseBody MyRestResponse handleMyRuntimeException(MyException exception) {
+		return new MyRestResponse("Some data I want to send back to the client.");
+	}
+
 }