SLF4J Not Binding Framework: The blank log library in the Java class library details
SLF4J Not Binding Framework: The blank log library in the Java class library
Brief introduction
SLF4J (Simple Logging Facade for Java) is a simple abstract layer for Java applications to provide a unified log record interface.It allows applications to write logging code in a separate manner, and use different log libraries to implement actual log records at the same time.SLF4J Not Binding is a special binding of SLF4J. It provides a blank log record library for disable any log record operation in the application.
The role of SLF4J Not Binding
In the process of developing applications, enabling or disabled log records are one of the common needs.In some cases, when we develop or debug applications, we may want to completely disable log records to improve performance or reduce unnecessary output.At this time, SLF4J Not Binding has become a useful tool, which provides a lightweight solution to disable log record operations.
How to use SLF4J Not Binding
To use SLF4J Not Binding in the Java application, you need to configure it according to the following steps.
Step 1: Add dependencies
First of all, you need to add SLF4J NOP BIPING to the dependencies of the project.You can add it to the project's dependency file through building tools such as Maven or Gradle.
Maven dependence:
<dependencies>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-nop</artifactId>
<version>1.7.32</version>
</dependency>
</dependencies>
Gradle dependencies:
groovy
dependencies {
implementation 'org.slf4j:slf4j-nop:1.7.32'
}
Step 2: Configure log recorder
Next, you need to specify SLF4J Not Binding in the log configuration file of the application.
Example of using logback.xml configuration file:
<configuration>
<appender name="stdout" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
</encoder>
</appender>
<root level="debug">
<appender-ref ref="stdout" />
</root>
</configuration>
Example of using log4j.properties configuration file:
properties
log4j.rootLogger=debug,stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
In the above configuration file examples, the output log date time, thread information, log level, recorder name and message content, etc.
Step 3: Use SLF4J NOP BINDING
In the application code, the log record interface of the SLF4J is used for the log operation.Since SLF4J NOP BIP Binding is a blank log library, it does not perform any logging operations, so it will not produce any actual log output when enabled SLF4J Not Binding.
Example code:
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class MyApp {
private static final Logger logger = LoggerFactory.getLogger(MyApp.class);
public static void main(String[] args) {
logger.info("This is an informational message.");
logger.debug("This is a debug message.");
logger.error("This is an error message.");
}
}
In the above examples, we use the Logger interface of SLF4J to record different levels of log messages, but because the existence of SLF4J Not Binding, there will be no actual log output.
Summarize
SLF4J Not Binding is a special binding of SLF4J. It provides a lightweight solution to disable logging operations.By using SLF4J Not Binding in the application, you can flexibly enable or disable log records in the process of development and debugging, thereby improving the performance of the application and maintainability.
