slf4j | Simple Logging Facade for Java

 by   qos-ch Java Version: v_2.0.7 License: MIT

kandi X-RAY | slf4j Summary

kandi X-RAY | slf4j Summary

slf4j is a Java library typically used in Logging applications. slf4j has build file available, it has a Permissive License and it has medium support. However slf4j has 172 bugs and it has 1 vulnerabilities. You can download it from GitHub, Maven.

The Simple Logging Facade for Java (SLF4J) serves as a simple facade or abstraction for various logging frameworks (e.g. java.util.logging, logback, log4j) allowing the end user to plug in the desired logging framework at deployment time. More information can be found on the SLF4J website.

            kandi-support Support

              slf4j has a medium active ecosystem.
              It has 2145 star(s) with 936 fork(s). There are 114 watchers for this library.
              It had no major release in the last 6 months.
              slf4j has no issues reported. There are 104 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of slf4j is v_2.0.7

            kandi-Quality Quality

              slf4j has 172 bugs (3 blocker, 1 critical, 71 major, 97 minor) and 1267 code smells.

            kandi-Security Security

              slf4j has 1 vulnerability issues reported (1 critical, 0 high, 0 medium, 0 low).
              slf4j code analysis shows 0 unresolved vulnerabilities.
              There are 52 security hotspots that need review.

            kandi-License License

              slf4j is licensed under the MIT License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              slf4j releases are not available. You will need to build from source code and install.
              Deployable package is available in Maven.
              Build file is available. You can build the component from source.
              Installation instructions are available. Examples and code snippets are not available.
              slf4j saves you 10373 person hours of effort in developing the same functionality from scratch.
              It has 21087 lines of code, 1689 functions and 305 files.
              It has medium code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi has reviewed slf4j and discovered the below as its top functions. This is intended to give you an instant insight into slf4j implemented functionality, and help decide if they suit your requirements.
            • Log a message at level TRACE
            • Log a message at the TRACE level
            • Get a resource as a stream
            • Returns the context class loader
            • Get a boolean property
            • Gets the string property
            • Log a message at the FATAL level
            • Log a trace message
            • Log a message at trace level
            • Log a message at level FATAL
            • Indicates if the log level is enabled
            • Check if the log level is enabled
            • Checks if is info enabled
            • Check if the log level is enabled
            • Check if this log level is enabled
            • Get attribute names
            • Removes an attribute
            • Returns true if the log enabled
            • Log a message at debug level
            • Set an attribute
            • Resolve object
            • Deserialize object
            • Gets a unique id for an object
            • Issue a warning
            • Get an attribute
            Get all kandi verified functions for this library.

            slf4j Key Features

            No Key Features are available at this moment for slf4j.

            slf4j Examples and Code Snippets

            Returns an instance of Slf4J logger .
            javadot img1Lines of Code : 4dot img1License : Permissive (MIT License)
            copy iconCopy
                public System.Logger getLogger(String name, Module module) {
                    return new Slf4jLogger(name);
            copy iconCopy
            function alert2() {
              // with integration of the extra column
              var sh1 = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("Data");
              var sh2 = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("Output2");
              var output = []
              if (sh
            Generating multiple jars for spring boot with gradle
            Lines of Code : 52dot img3License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            import org.springframework.boot.gradle.plugin.SpringBootPlugin
            import org.springframework.boot.gradle.tasks.bundling.BootJar
            plugins {
                id("org.springframework.boot") version "2.6.4"
            group = "io.mateo"
            java {
            Cuda gdb print constant
            Lines of Code : 70dot img4License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            $ cat
            const int cs = 1 << 14;
            __constant__ int cdata[cs];
            __global__ void k(int *gdata){
              gdata[0] = cdata[0];
            int main(){
              int *hdata = new int[cs];
              for (int i = 0; i < cs; i++) hdata[i] = i+1;
            How to swap env file for another docker service
            Lines of Code : 45dot img5License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            # docker-compose.cypress.yml
            # Used only for integration testing
            version: '3.8'
                build: .
                restart: on-failure
                  - "3000:3000"
                env_file: .env.test # <-- specific to this test-oriented Compose
            Can Google Cloud server as an endpoint for Snowflake HTTPS traffic?
            Lines of Code : 29dot img6License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            swagger: '2.0'
              title: API Gateway config for Snowflake external function.
              description: This configuration file connects the API Gateway resource to the remote service (Cloud Run).
              version: 1.0.0
              - https
            Validating the SSIS config files configured on the SQL Server Agent Jobs
            Lines of Code : 58dot img7License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
                [sJOB].[job_id] AS [JobID]
                , [sJOB].[name] AS [JobName]
                , [sJSTP].[step_uid] AS [StepID]
                , [sJSTP].[step_id] AS [StepNo]
                , [sJSTP].[step_name] AS [StepName]
                , CASE [sJSTP].[subsystem]
                    WHEN 'ActiveScri
            How to reference an already running docker container in jenkins docker plugin?
            Lines of Code : 22dot img8License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            // Assign a unique (and known) Compose project name
            def projectName = env.BUILD_TAG
            try {
              // Start up the Compose stack
              sh "docker-compose -p ${projectName} up --build -d"
              // (Consider limiting to dependencies only, without --build)
            Is testing in Gitlab Ci supported with Opensearch docker images as a service?
            Lines of Code : 15dot img9License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            CMD ["./"]
              stage: integration
                OPENSEARCH_JAVA_OPTS: "-Xms512m -Xmx512m"
                DISABLE_INSTALL_DEMO_CONFIG: "true"
                DISABLE_SECURITY_PLUGIN: "true"
            Cypress: Import tests into "./cypress/integration" from multiple npm dependencies?
            Lines of Code : 45dot img10License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            const cypress = require('cypress')
            const testProjects = ['../cy_test_A', '../cy_test_B']
            testProjects.forEach(project => {
                reporter: 'junit',
                browser: 'chrome',
                project,                // can specify the p

            Community Discussions


            How do I use a Transaction in a Reactive Flow in Spring Integration?
            Asked 2021-Jun-15 at 18:32

            I am querying a database for an item using R2DBC and Spring Integration. I want to extend the transaction boundary a bit to include a handler - if the handler fails I want to roll back the database operation. But I'm having difficulty even establishing transactionality explicitly in my integration flow. The flow is defined as



            Answered 2021-Jun-15 at 18:32

            Well, it's indeed not possible that declarative way since we don't have hook for injecting to the reactive type in the middle on that level.

            Try to look into a TransactionalOperator and its usage from the Java DSL's fluxTransform():



            Java RabbitMQ connection is already closed
            Asked 2021-Jun-15 at 10:14

            I need to push messages to external rabbitmq. My java configuration successfully declares queue to push, but every time I try to push, I have next exception:



            Answered 2021-Jun-15 at 07:19

            I'm struggling to understand how that code fits together, but this part strikes me as definitely wrong:



            Spring Batch Using CompositeItemWriter and CompositeItemProcessor
            Asked 2021-Jun-15 at 06:57

            Using Spring Batch, I have to write in two different table, but using the same ItemReader.

            I can't figure out how to use one ItemReader and a CompositeItemWriter.

            Here's the JobConfiguration :



            Answered 2021-Jun-15 at 06:57

            This is because your ItemProcessorSurveillance implements two interfaces: ItemProcessor and StepExecutionListener but is only registered as an ItemProcessor in the step. It should also be registered as a listener so that beforeStep is called when appropriate to set the stepExecution field.



            Getting java.lang.ClassNotFoundException when I try to do spark-submit, referred other similar queries online but couldnt get it to work
            Asked 2021-Jun-14 at 09:36

            I am new to Spark and am trying to run on a hadoop cluster a simple spark jar file built through maven in intellij. But I am getting classnotfoundexception in all the ways I tried to submit the application through spark-submit.

            My pom.xml:



            Answered 2021-Jun-14 at 09:36

            You need to add scala-compiler configuration to your pom.xml. The problem is without that there is nothing to compile your SparkTrans.scala file into java classes.




            Mybatis custom type handler doesn't work: java.lang.NoSuchMethodException:
            Asked 2021-Jun-14 at 07:50

            ** I am implementing role-based access control to my application. There are 3 users(Admin, Teacher, Student) in the application with same attribute so I created a basedUser entity to let them inherit it. I wished to get the user's authority when I select it from the database, so I created a type handler to convert the authority in String type to GrantedAuthority type in the process but I don't know why I keep getting this error: **

            nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.reflection.ReflectionException: Error instantiating interface with invalid types () or values (). Cause: java.lang.NoSuchMethodException:] with root cause

            java.lang.NoSuchMethodException: at java.base/java.lang.Class.getConstructor0( ~[na:na] at java.base/java.lang.Class.getDeclaredConstructor( ~[na:na] at org.apache.ibatis.reflection.factory.DefaultObjectFactory.instantiateClass( ~[mybatis-3.5.4.jar:3.5.4] at org.apache.ibatis.reflection.factory.DefaultObjectFactory.create( ~[mybatis-3.5.4.jar:3.5.4] at org.apache.ibatis.reflection.factory.DefaultObjectFactory.create( ~[mybatis-3.5.4.jar:3.5.4] at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.createResultObject( ~[mybatis-3.5.4.jar:3.5.4] at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.createResultObject( ~[mybatis-3.5.4.jar:3.5.4]

            I have been looking for answers to this problem but not getting anywhere close, does anyone know how to solve this problem??




            Answered 2021-Jun-14 at 07:50

            Type handler is not a good fit for your usage.
            You should use constructor mapping.



            Eclipse PDE : java.lang.NoClassDefFoundError: org/eclipse/core/resources/ResourcesPlugin
            Asked 2021-Jun-13 at 15:15

            I have an Eclipse application which on execution giving below error -



            Answered 2021-Jun-13 at 15:15

            The log shows that the ResourcesPlugin is being found but its plug-in activator is getting a null pointer exception when it tries to get the IContentTypeManager.

            The content type manager is provided using OSGi declarative services but you have not included org.apache.felix.scr which deals with this.

            So at a minimum you need to include org.apache.felix.scr and start it in the section:



            Spring boot @Transactional not rolling back the database inserts
            Asked 2021-Jun-11 at 13:01

            Need some help here, I'm not able to understand why my transactions are not getting rolled back in an event of exception.

            I will try to put my code as close to as It is on the project (cannot share on the internet)

            This is my Service



            Answered 2021-Jun-11 at 12:22

            The method must be public if you want to use @Transactional.

            As per Spring Documentation:

            When you use transactional proxies with Spring’s standard configuration, you should apply the @Transactional annotation only to methods with public visibility. If you do annotate protected, private, or package-visible methods with the @Transactional annotation, no error is raised, but the annotated method does not exhibit the configured transactional settings.



            Bootstrap broker not being used to consume from topic
            Asked 2021-Jun-10 at 17:33

            A simple spring-boot-kafka which consumes from a topic on a network cluster:


            Bootstrap broker localhost:9092 (id: -1 rack: null) disconnected

            Connection to node -1 (localhost/ could not be established. Broker may not be available.


            The configured broker is not local, it's BROKER_1.FOO.NET:9094, and it is available.




            Answered 2021-Jun-10 at 17:33

            it's BROKER_1.FOO.NET:9094, and it is available.

            The bootstrap port may be available and responding to requests, but that broker then returned it's configured advertised.listeners.

            Based on your error, either

            1. that's set to be localhost/
            2. or you're getting the default Spring property for the bootstrap servers config



            Receive message with a custom object on Android SignalR client, data isn't deserializing
            Asked 2021-Jun-10 at 13:49

            I'm using SignalR on ASP.NET Core 5 web server for Android device management. I can send messages from device (D2C), and receive messages with String parameters (C2D). But I can't receive messages with custom object parameters, the handler receives all object members as null. I develop an WPF client and it receives this object well.

            I'm following ASP.NET Core SignalR Java client documentation. It explains how to use custom objects in Passing Class information in Java section.

            In build.gradle file:



            Answered 2021-Jun-10 at 13:49

            It seems that in the java client the custom object field names should be in lowercase. So changing the field names solves the problem.

            Custom class in Android project:



            Copy header tag in xml spring batch application
            Asked 2021-Jun-10 at 08:14

            I am using spring-batch in spring-boot application. The Spring Boot version is 2.3.3.RELEASE.

            What I intend to achieve

            I have to read a xml file containing thousands of Transactions with header tag (fileInformation). Do some business logic on transaction and then write the file back with the updated values in transaction. I am using StaxEventItemReader for reading the file and StaxEventItemWriter for writing to the file. Then i have couple of ItemProcessors for handling the business logic. Xml file looks like :



            Answered 2021-Jun-10 at 07:38

            You step is doing too much. I would beak things down to two steps:

            • Step 1: extracts the file information header and puts it in the job execution context
            • Step 2: reads the file information header from the execution context and uses it in whatever step-scoped bean needed for that step (for example the stax callback in your case)

            Here is a quick example:


            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


            No vulnerabilities reported

            Install slf4j

            SLF4J uses Maven as its build tool. All versions upto and including 1.7.x require Java 5 or later to build. SLF4J version 2.0.x requires Java 9 or later.


            If you are interested in improving SLF4J, that is great! The SLF4J community looks forward to your contribution. Please follow this process:.
            Find more information at:

            Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items

            Find more libraries
          • HTTPS


          • CLI

            gh repo clone qos-ch/slf4j

          • sshUrl


          • Stay Updated

            Subscribe to our newsletter for trending solutions and developer bootcamps

            Agree to Sign up and Terms & Conditions

            Share this Page

            share link