I am currently using Spring Boot in my application and I know that it uses Logback as its default logging implementation.
Currently in my applications.properties file I have the following:
#some other properties
#logging details
logging.path= path/to/my/log/folder
This currently logs to a file: spring.log in my output folder.
How can I change this file so that it contains a time-stamp and date of when it was created?
E.g - "my-application-log-DATE-TIME.log"
Drop the .properties file style configuration and use logback's proper one - logback.xml. Spring Boot is fully prepared for this! Here's an example:
<property name="logPattern" value="%d %-5level %logger{35} - %msg%n"/>
<property name="logEncoding" value="UTF-8"/>
<property name="logDirectory" value="logs"/>
<appender name="fileAppender" class="ch.qos.logback.core.rolling.RollingFileAppender">
<file>${logDirectory}/myapplication.log</file>
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<fileNamePattern>${logDirectory}/myapplication_%d{yyyy-MM-dd}.%i.log</fileNamePattern>
<timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
<maxFileSize>30MB</maxFileSize>
</timeBasedFileNamingAndTriggeringPolicy>
</rollingPolicy>
<encoder>
<charset>${logEncoding}</charset>
<pattern>${logPattern}</pattern>
</encoder>
</appender>
<logger name="org.springframework" level="warn"/>
<root level="INFO">
<appender-ref ref="fileAppender"/>
</root>
This will not just add a timestamp to the log file, but will help you with log rotation as well (e.g. it'll keep old logs until they reach a certain size, etc).
You are in the right way to do it. Use the property support of Spring Boot to custom you application.properties file.
// application.properties file
app.name=appname
logging.path=logpath
logging.file=${appname}-{timestamp}.log
In the other hand in your backing class, you can create an url helper to get the property value :
/**
* Helper class to get configured urls.
*/
@Component
public class UrlHelper {
@Inject
private Environment env;
private static final String LOGGING_TIMESTAMP = "{timestamp}";
private static String loggingFileUrlPattern;
/**
* Initializes properties.
*/
@PostConstruct
public void initProperties() {
loggingFileUrlPattern = env.getRequiredProperty("logging.file");
}
/**
* Formats the loggin Url pattern application property with the current
* timestamp
*
* @param timestamp
* current timestamp.
* @return The complete logging file url.
*/
public static String buildLoggingFileUrl(String timestamp) {
return loggingFileUrlPattern.replace(LOGGING_FILE_URL, timestamp);
}
}
Hope it helps !
In the appender, try to add this:
<layout class="ch.qos.logback.classic.PatternLayout">
<Pattern>
%d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger{36} - %msg%n
</Pattern> </layout>
