Add Endpoint to emit log messages

Author: KarstenSchnitter

sample-spring-boot/pom.xml

@@ -85,6 +85,13 @@
 			<plugin>
 				<groupId>org.springframework.boot</groupId>
 				<artifactId>spring-boot-maven-plugin</artifactId>
+				<executions>
+					<execution>
+						<goals>
+							<goal>repackage</goal>
+						</goals>
+					</execution>
+				</executions>
 			</plugin>
 		</plugins>
 	</build>

sample-spring-boot/src/main/java/com/sap/hcp/cf/logging/sample/springboot/controller/LogController.java

@@ -0,0 +1,56 @@
+package com.sap.hcp.cf.logging.sample.springboot.controller;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+/**
+ * This controller provides an endpoint to generate logs. This can be used to
+ * test logging.
+ */
+@RestController
+public class LogController {
+
+	private static final String DEFAULT_LOG_MESSAGE = "This is the default log message!";
+
+	/**
+	 * Generate a log event with the given parameters.
+	 * 
+	 * @param loggerName the name of the logger to use
+	 * @param logLevel   the level to use, allowed values: error, warn, info, debug,
+	 *                   trace
+	 * @param message    the message to log, defaults to
+	 *                   {@value #DEFAULT_LOG_MESSAGE}
+	 * @return a response containing the emitted message
+	 */
+	@PostMapping("/log/{logger}/{logLevel}")
+	public ResponseEntity<String> generateLog(@PathVariable("logger") String loggerName,
+			@PathVariable("logLevel") String logLevel,
+			@RequestParam(name = "m", required = false, defaultValue = DEFAULT_LOG_MESSAGE) String message) {
+		Logger logger = LoggerFactory.getLogger(loggerName);
+		switch (logLevel.toLowerCase()) {
+		case "error":
+			logger.error(message);
+			return ResponseEntity.ok().body("Generated error log with message: \"" + message + "\".");
+		case "warn":
+		case "warning":
+			logger.warn(message);
+			return ResponseEntity.ok().body("Generated warn log with message: \"" + message + "\".");
+		case "info":
+		case "informational":
+			logger.info(message);
+			return ResponseEntity.ok().body("Generated info log with message: \"" + message + "\".");
+		case "debug":
+			logger.debug(message);
+			return ResponseEntity.ok().body("Generated debug log with message: \"" + message + "\".");
+		case "trace":
+			logger.trace(message);
+			return ResponseEntity.ok().body("Generated trace log with message: \"" + message + "\".");
+		}
+		return ResponseEntity.badRequest().body("Unknows log level \"" + logLevel + "\".");
+	}
+}