Dieser Inhalt ist in der von Ihnen ausgewählten Sprache nicht verfügbar.
Chapter 1. Logging configuration
Read about the use of logging API in Red Hat build of Quarkus, configuring logging output, and using logging adapters to unify the output from other logging APIs.
Quarkus uses the JBoss Log Manager logging backend for publishing application and framework logs. Quarkus supports the JBoss Logging API and multiple other logging APIs, seamlessly integrated with JBoss Log Manager. You can use any of the following APIs:
1.1. Use JBoss Logging for application logging
When using the JBoss Logging API, your application requires no additional dependencies, as Red Hat build of Quarkus automatically provides it.
An example of using the JBoss Logging API to log a message:
import org.jboss.logging.Logger; import jakarta.ws.rs.GET; import jakarta.ws.rs.Path; import jakarta.ws.rs.Produces; import jakarta.ws.rs.core.MediaType; @Path("/hello") public class ExampleResource { private static final Logger LOG = Logger.getLogger(ExampleResource.class); @GET @Produces(MediaType.TEXT_PLAIN) public String hello() { LOG.info("Hello"); return "hello"; } }
While JBoss Logging routes log messages into JBoss Log Manager directly, one of your libraries might rely on a different logging API. In such cases, you need to use a logging adapter to ensure that its log messages are routed to JBoss Log Manager as well.
1.2. Get an application logger
To get an application logger in Red Hat build of Quarkus, select one of the following approaches.
1.2.1. Declaring a logger field
With this classic approach, you use a specific API to obtain a logger instance, store it in a static field of a class, and call logging operations upon this instance.
The same flow can be applied with any of the supported logging APIs.
An example of storing a logger instance into a static field by using the JBoss Logging API:
package com.example; import org.jboss.logging.Logger; public class MyService { private static final Logger log = Logger.getLogger(MyService.class); 1 public void doSomething() { log.info("It works!"); 2 } }
1.2.2. Simplified logging
Quarkus simplifies logging by automatically adding logger fields to classes that use io.quarkus.logging.Log
. This eliminates the need for repetitive boilerplate code and enhances logging setup convenience.
An example of simplified logging with static method calls:
package com.example; import io.quarkus.logging.Log; 1 class MyService { 2 public void doSomething() { Log.info("Simple!"); 3 } }
- 1
- The
io.quarkus.logging.Log
class contains the same methods as JBoss Logging, except that they arestatic
. - 2
- Note that the class does not declare a logger field. This is because during application build, a
private static final org.jboss.logging.Logger
field is created automatically in each class that uses theLog
API. The fully qualified name of the class that calls theLog
methods is used as a logger name. In this example, the logger name would becom.example.MyService
. - 3
- Finally, all calls to
Log
methods are rewritten to regular JBoss Logging calls on the logger field during the application build.
Only use the Log
API in application classes, not in external dependencies. Log
method calls that are not processed by Quarkus at build time will throw an exception.
1.2.3. Injecting a configured logger
The injection of a configured org.jboss.logging.Logger
logger instance with the @Inject
annotation is another alternative to adding an application logger, but is applicable only to CDI beans.
You can use @Inject Logger log
, where the logger gets named after the class you inject it to, or @Inject @LoggerName("…") Logger log
, where the logger will receive the specified name. Once injected, you can use the log
object to invoke logging methods.
An example of two different types of logger injection:
package com.example; import org.jboss.logging.Logger; @ApplicationScoped class SimpleBean { @Inject Logger log; 1 @LoggerName("foo") Logger fooLog; 2 public void ping() { log.info("Simple!"); fooLog.info("Goes to _foo_ logger!"); } }
The logger instances are cached internally. Therefore, when a logger is injected, for example, into a @RequestScoped
bean, it is shared for all bean instances to avoid possible performance penalties associated with logger instantiation.
1.3. Use log levels
Red Hat build of Quarkus provides different log levels, which helps developers to control the amount of information logged based on the severity of the events.
Table 1.1. Available log levels:
OFF | A special level used in configuration to turn off logging. |
FATAL | A critical service failure or total inability to handle any requests. |
ERROR | A major issue in processing or an inability to complete a request. |
WARN | A non-critical service error or problem that might not require immediate correction. |
INFO | Service lifecycle events or other important infrequent information. |
DEBUG | Additional information about lifecycle events or events not tied to specific requests, useful for debugging. |
TRACE | Detailed per-request debugging information, potentially at a very high frequency. |
ALL | A special level to turn on logging for all messages, including custom levels. |
You can also configure the following levels for applications and libraries that use java.util.logging
:
SEVERE | Same as ERROR. |
WARNING | Same as WARN. |
CONFIG | Service configuration information. |
FINE | Same as DEBUG. |
FINER | Same as TRACE. |
FINEST |
Increased debug output compared to |
Numerical level value | Standard level name | Equivalent java.util.logging (JUL) level name |
---|---|---|
1100 | FATAL | Not applicable |
1000 | ERROR | SEVERE |
900 | WARN | WARNING |
800 | INFO | INFO |
700 | Not applicable | CONFIG |
500 | DEBUG | FINE |
400 | TRACE | FINER |
300 | Not applicable | FINEST |
1.4. Configure the log level, category, and format
JBoss Logging, integrated into Red Hat build of Quarkus, offers a unified configuration for all supported logging APIs through a single configuration file that sets up all available extensions. To adjust runtime logging, modify the application.properties
file.
An example of how you can set the default log level to INFO
logging and include Hibernate DEBUG
logs:
quarkus.log.level=INFO quarkus.log.category."org.hibernate".level=DEBUG
When you set the log level to below DEBUG
, you must also adjust the minimum log level. This setting might be applied either globally with the quarkus.log.min-level
configuration property, or per category:
quarkus.log.category."org.hibernate".min-level=TRACE
This sets a floor level for which Quarkus needs to generate supporting code. The minimum log level must be set at build time so that Quarkus can open the door to optimization opportunities where logging on unusable levels can be elided.
An example from native execution:
Setting INFO
as the minimum logging level sets lower-level checks, such as isTraceEnabled
, to false
. This identifies code like if(logger.isDebug()) callMethod();
that will never be executed and mark it as "dead."
If you add these properties on the command line, ensure the "
character is escaped properly:
-Dquarkus.log.category.\"org.hibernate\".level=TRACE
All potential properties are listed in the logging configuration reference section.
1.4.1. Logging categories
Logging is configured on a per-category basis, with each category being configured independently. Configuration for a category applies recursively to all subcategories unless there is a more specific subcategory configuration.
The parent of all logging categories is called the "root category." As the ultimate parent, this category might contain a configuration that applies globally to all other categories. This includes the globally configured handlers and formatters.
Example 1.1. An example of a global configuration that applies to all categories:
quarkus.log.handlers=con,mylog quarkus.log.handler.console.con.enable=true quarkus.log.handler.file.mylog.enable=true
In this example, the root category is configured to use two named handlers: con
and mylog
.
Example 1.2. An example of a per-category configuration:
quarkus.log.category."org.apache.kafka.clients".level=INFO quarkus.log.category."org.apache.kafka.common.utils".level=INFO
This example shows how you can configure the minimal log level on the categories org.apache.kafka.clients
and org.apache.kafka.common.utils
.
For more information, see Logging configuration reference.
If you want to configure something extra for a specific category, create a named handler like quarkus.log.handler.[console|file|syslog].<your-handler-name>.*
and set it up for that category by using quarkus.log.category.<my-category>.handlers
.
An example use case can be a desire to use a different timestamp format for log messages which are saved to a file than the format used for other handlers.
For further demonstration, see the outputs of the Attaching named handlers to a category example.
Property Name | Default | Description |
---|---|---|
|
|
The level to use to configure the category named |
|
|
The minimum logging level to use to configure the category named |
|
| Specify whether this logger should send its output to its parent logger. |
|
| The names of the handlers that you want to attach to a specific category. |
[a]
Some extensions might define customized default log levels for certain categories to reduce log noise by default. Setting the log level in configuration will override any extension-defined log levels.
[b]
By default, the configured category gets the same handlers attached as the one on the root logger.
|
The .
symbol separates the specific parts in the configuration property. The quotes in the property name are used as a required escape to keep category specifications, such as quarkus.log.category."io.quarkus.smallrye.jwt".level=TRACE
, intact.
1.4.2. Root logger configuration
The root logger category is handled separately, and is configured by using the following properties:
Property Name | Default | Description |
---|---|---|
|
| The default log level for every log category. |
|
| The default minimum log level for every log category. |
- The parent category is examined if no level configuration exists for a given logger category.
- The root logger configuration is used if no specific configurations are provided for the category and any of its parent categories.
Although the root logger’s handlers are usually configured directly via quarkus.log.console
, quarkus.log.file
and quarkus.log.syslog
, it can nonetheless have additional named handlers attached to it using the quarkus.log.handlers
property.
1.5. Logging format
Red Hat build of Quarkus uses a pattern-based logging formatter that generates human-readable text logs by default, but you can also configure the format for each log handler by using a dedicated property.
For the console handler, the property is quarkus.log.console.format
.
The logging format string supports the following symbols:
Symbol | Summary | Description |
---|---|---|
|
|
Renders a simple |
| Category | Renders the category name. |
| Source class | Renders the source class name.[a] |
| Date |
Renders a date with the given date format string, which uses the syntax defined by |
| Exception | Renders the thrown exception, if any. |
| Source file | Renders the source file name.[a] |
| Host name | Renders the system simple host name. |
| Qualified host name | Renders the system’s fully qualified host name, which might be the same as the simple host name, depending on operating system configuration. |
| Process ID | Render the current process PID. |
| Source location | Renders the source location information, which includes source file name, line number, class name, and method name.[a] |
| Source line | Renders the source line number.[a] |
| Full Message | Renders the log message plus exception (if any). |
| Source method | Renders the source method name.[a] |
| Newline | Renders the platform-specific line separator string. |
| Process name | Render the name of the current process. |
| Level | Render the log level of the message. |
| Relative time | Render the time in milliseconds since the start of the application log. |
| Simple message | Renders just the log message, with no exception trace. |
| Thread name | Render the thread name. |
| Thread ID | Render the thread ID. |
| Time zone |
Set the time zone of the output to |
| Mapped Diagnostic Context Value | Renders the value from Mapped Diagnostic Context. |
| Mapped Diagnostic Context Values |
Renders all the values from Mapped Diagnostic Context in format |
| Nested Diagnostics context values |
Renders all the values from Nested Diagnostics Context in format |
[a]
Format sequences which examine caller information might affect performance
|
1.5.1. Alternative console logging formats
Changing the console log format is useful, for example, when the console output of the Quarkus application is captured by a service that processes and stores the log information for later analysis.
1.5.1.1. JSON logging format
The quarkus-logging-json
extension might be employed to add support for the JSON logging format and its related configuration.
Add this extension to your build file as the following snippet illustrates:
Using Maven:
<dependency> <groupId>io.quarkus</groupId> <artifactId>quarkus-logging-json</artifactId> </dependency>
Using Gradle:
implementation("io.quarkus:quarkus-logging-json")
By default, the presence of this extension replaces the output format configuration from the console configuration, and the format string and the color settings (if any) are ignored. The other console configuration items, including those that control asynchronous logging and the log level, will continue to be applied.
For some, it will make sense to use humanly readable (unstructured) logging in dev mode and JSON logging (structured) in production mode. This can be achieved using different profiles, as shown in the following configuration.
Disable JSON logging in application.properties for dev and test mode:
%dev.quarkus.log.console.json=false %test.quarkus.log.console.json=false
1.5.1.1.1. Configuration
Configure the JSON logging extension using supported properties to customize its behavior.
Configuration property fixed at build time - All other configuration properties are overridable at runtime
Configuration property | Type | Default |
Type | Default | |
Determine whether to enable the JSON console formatting extension, which disables "normal" console formatting.
Environment variable: | boolean |
|
Enable "pretty printing" of the JSON record. Note that some JSON parsers will fail to read the pretty printed output.
Environment variable: | boolean |
|
The date format to use. The special string "default" indicates that the default format should be used.
Environment variable: | string |
|
The special end-of-record delimiter to be used. By default, newline is used.
Environment variable: | string | |
The zone ID to use. The special string "default" indicates that the default zone should be used.
Environment variable: | string |
|
The exception output type to specify.
Environment variable: |
|
|
Enable printing of more details in the log. Printing the details can be expensive as the values are retrieved from the caller. The details include the source class name, source file name, source method name, and source line number.
Environment variable: | boolean |
|
Override keys with custom values. Omitting this value indicates that no key overrides will be applied.
Environment variable: | string | |
Keys to be excluded from the JSON output.
Environment variable: | list of string | |
Additional field value.
Environment variable: | string | required |
Additional field type specification. Supported types:
Environment variable: |
|
|
Type | Default | |
Determine whether to enable the JSON console formatting extension, which disables "normal" console formatting.
Environment variable: | boolean |
|
Enable "pretty printing" of the JSON record. Note that some JSON parsers will fail to read the pretty printed output.
Environment variable: | boolean |
|
The date format to use. The special string "default" indicates that the default format should be used.
Environment variable: | string |
|
The special end-of-record delimiter to be used. By default, newline is used.
Environment variable: | string | |
The zone ID to use. The special string "default" indicates that the default zone should be used.
Environment variable: | string |
|
The exception output type to specify.
Environment variable: |
|
|
Enable printing of more details in the log. Printing the details can be expensive as the values are retrieved from the caller. The details include the source class name, source file name, source method name, and source line number.
Environment variable: | boolean |
|
Override keys with custom values. Omitting this value indicates that no key overrides will be applied.
Environment variable: | string | |
Keys to be excluded from the JSON output.
Environment variable: | list of string | |
Additional field value.
Environment variable: | string | required |
Additional field type specification. Supported types:
Environment variable: |
|
|
Type | Default | |
Determine whether to enable the JSON console formatting extension, which disables "normal" console formatting.
Environment variable: | boolean |
|
Enable "pretty printing" of the JSON record. Note that some JSON parsers will fail to read the pretty printed output.
Environment variable: | boolean |
|
The date format to use. The special string "default" indicates that the default format should be used.
Environment variable: | string |
|
The special end-of-record delimiter to be used. By default, newline is used.
Environment variable: | string | |
The zone ID to use. The special string "default" indicates that the default zone should be used.
Environment variable: | string |
|
The exception output type to specify.
Environment variable: |
|
|
Enable printing of more details in the log. Printing the details can be expensive as the values are retrieved from the caller. The details include the source class name, source file name, source method name, and source line number.
Environment variable: | boolean |
|
Override keys with custom values. Omitting this value indicates that no key overrides will be applied.
Environment variable: | string | |
Keys to be excluded from the JSON output.
Environment variable: | list of string | |
Additional field value.
Environment variable: | string | required |
Additional field type specification. Supported types:
Environment variable: |
|
|
Enabling pretty printing might cause certain processors and JSON parsers to fail.
Printing the details can be expensive as the values are retrieved from the caller. The details include the source class name, source file name, source method name, and source line number.
1.6. Log handlers
A log handler is a logging component responsible for the emission of log events to a recipient. Red Hat build of Quarkus includes several different log handlers: console, file, and syslog.
The featured examples use com.example
as a logging category.
1.6.1. Console log handler
The console log handler is enabled by default, and it directs all log events to the application’s console, usually the system’s stdout
.
A global configuration example:
quarkus.log.console.format=%d{yyyy-MM-dd HH:mm:ss} %-5p [%c] (%t) %s%e%n
A per-category configuration example:
quarkus.log.handler.console.my-console-handler.format=%d{yyyy-MM-dd HH:mm:ss} [com.example] %s%e%n quarkus.log.category."com.example".handlers=my-console-handler quarkus.log.category."com.example".use-parent-handlers=false
For details about its configuration, see the console logging configuration reference.
1.6.2. File log handler
To log events to a file on the application’s host, use the Quarkus file log handler. The file log handler is disabled by default, so you must first enable it.
The Quarkus file log handler supports log file rotation.
Log file rotation ensures efficient log management by preserving a specified number of backup files while keeping the primary log file updated and at a manageable size.
A global configuration example:
quarkus.log.file.enable=true quarkus.log.file.path=application.log quarkus.log.file.format=%d{yyyy-MM-dd HH:mm:ss} %-5p [%c] (%t) %s%e%n
A per-category configuration example:
quarkus.log.handler.file.my-file-handler.enable=true quarkus.log.handler.file.my-file-handler.path=application.log quarkus.log.handler.file.my-file-handler.format=%d{yyyy-MM-dd HH:mm:ss} [com.example] %s%e%n quarkus.log.category."com.example".handlers=my-file-handler quarkus.log.category."com.example".use-parent-handlers=false
For details about its configuration, see the file logging configuration reference.
1.6.3. Syslog log handler
The syslog handler in Quarkus follows the Syslog protocol, which is used to send log messages on UNIX-like systems. It uses the protocol defined in RFC 5424.
By default, the syslog handler is disabled. When enabled, it sends all log events to a syslog server, typically the local syslog server for the application.
A global configuration example:
quarkus.log.syslog.enable=true quarkus.log.syslog.app-name=my-application quarkus.log.syslog.format=%d{yyyy-MM-dd HH:mm:ss} %-5p [%c] (%t) %s%e%n
A per-category configuration example:
quarkus.log.handler.syslog.my-syslog-handler.enable=true quarkus.log.handler.syslog.my-syslog-handler.app-name=my-application quarkus.log.handler.syslog.my-syslog-handler.format=%d{yyyy-MM-dd HH:mm:ss} [com.example] %s%e%n quarkus.log.category."com.example".handlers=my-syslog-handler quarkus.log.category."com.example".use-parent-handlers=false
For details about its configuration, see the Syslog logging configuration reference.
1.7. Add a logging filter to your log handler
Log handlers, such as the console log handler, can be linked with a filter that determines whether a log record should be logged.
To register a logging filter:
Annotate a
final
class that implementsjava.util.logging.Filter
with@io.quarkus.logging.LoggingFilter
, and set thename
property:An example of writing a filter:
package com.example; import io.quarkus.logging.LoggingFilter; import java.util.logging.Filter; import java.util.logging.LogRecord; @LoggingFilter(name = "my-filter") public final class TestFilter implements Filter { private final String part; public TestFilter(@ConfigProperty(name = "my-filter.part") String part) { this.part = part; } @Override public boolean isLoggable(LogRecord record) { return !record.getMessage().contains(part); } }
In this example, we exclude log records containing specific text from console logs. The specific text to filter on is not hard-coded; instead, it is read from the
my-filter.part
configuration property.An example of Configuring the filter in
application.properties
:my-filter.part=TEST
Attach the filter to the corresponding handler using the
filter
configuration property, located inapplication.properties
:quarkus.log.console.filter=my-filter
1.8. Examples of logging configurations
The following examples show some of the ways in which you can configure logging in Red Hat build of Quarkus:
Console DEBUG logging except for Quarkus logs (INFO), no color, shortened time, shortened category prefixes
quarkus.log.console.format=%d{HH:mm:ss} %-5p [%c{2.}] (%t) %s%e%n quarkus.log.console.level=DEBUG quarkus.console.color=false quarkus.log.category."io.quarkus".level=INFO
If you add these properties in the command line, ensure "
is escaped. For example, -Dquarkus.log.category.\"io.quarkus\".level=DEBUG
.
File TRACE logging configuration
quarkus.log.file.enable=true # Send output to a trace.log file under the /tmp directory quarkus.log.file.path=/tmp/trace.log quarkus.log.file.level=TRACE quarkus.log.file.format=%d{HH:mm:ss} %-5p [%c{2.}] (%t) %s%e%n # Set 2 categories (io.quarkus.smallrye.jwt, io.undertow.request.security) to TRACE level quarkus.log.min-level=TRACE quarkus.log.category."io.quarkus.smallrye.jwt".level=TRACE quarkus.log.category."io.undertow.request.security".level=TRACE
As we do not change the root logger, the console log contains only INFO
or higher level logs.
Named handlers attached to a category
# Send output to a trace.log file under the /tmp directory quarkus.log.file.path=/tmp/trace.log quarkus.log.console.format=%d{HH:mm:ss} %-5p [%c{2.}] (%t) %s%e%n # Configure a named handler that logs to console quarkus.log.handler.console."STRUCTURED_LOGGING".format=%e%n # Configure a named handler that logs to file quarkus.log.handler.file."STRUCTURED_LOGGING_FILE".enable=true quarkus.log.handler.file."STRUCTURED_LOGGING_FILE".format=%e%n # Configure the category and link the two named handlers to it quarkus.log.category."io.quarkus.category".level=INFO quarkus.log.category."io.quarkus.category".handlers=STRUCTURED_LOGGING,STRUCTURED_LOGGING_FILE
Named handlers attached to the root logger
# configure a named file handler that sends the output to 'quarkus.log' quarkus.log.handler.file.CONSOLE_MIRROR.enable=true quarkus.log.handler.file.CONSOLE_MIRROR.path=quarkus.log # attach the handler to the root logger quarkus.log.handlers=CONSOLE_MIRROR
1.9. Centralized log management
Use a centralized location to efficiently collect, store, and analyze log data from various components and instances of the application.
To send logs to a centralized tool such as Graylog, Logstash, or Fluentd, see the Quarkus Centralized log management guide.
1.10. Configure logging for @QuarkusTest
Enable proper logging for @QuarkusTest
by setting the java.util.logging.manager
system property to org.jboss.logmanager.LogManager
.
The system property must be set early on to be effective, so it is recommended to configure it in the build system.
Setting the java.util.logging.manager
system property in the Maven Surefire plugin configuration
<build> <plugins> <plugin> <artifactId>maven-surefire-plugin</artifactId> <version>${surefire-plugin.version}</version> <configuration> <systemPropertyVariables> <java.util.logging.manager>org.jboss.logmanager.LogManager</java.util.logging.manager> 1 <quarkus.log.level>DEBUG</quarkus.log.level> 2 <maven.home>${maven.home}</maven.home> </systemPropertyVariables> </configuration> </plugin> </plugins> </build>
For Gradle, add the following configuration to the build.gradle
file:
test { systemProperty "java.util.logging.manager", "org.jboss.logmanager.LogManager" }
See also Running @QuarkusTest
from an IDE.
1.11. Use other logging APIs
Red Hat build of Quarkus relies on the JBoss Logging library for all the logging requirements.
Suppose you use libraries that depend on other logging libraries, such as Apache Commons Logging, Log4j, or SLF4J. In that case, exclude them from the dependencies and use one of the JBoss Logging adapters.
This is especially important when building native executables, as you could encounter issues similar to the following when compiling the native executable:
Caused by java.lang.ClassNotFoundException: org.apache.commons.logging.impl.LogFactoryImpl
The logging implementation is not included in the native executable, but you can resolve this issue using JBoss Logging adapters.
These adapters are available for popular open-source logging components, as explained in the next chapter.
1.11.1. Add a logging adapter to your application
For each logging API that is not jboss-logging
:
Add a logging adapter library to ensure that messages logged through these APIs are routed to the JBoss Log Manager backend.
NoteThis step is unnecessary for libraries that are dependencies of a Quarkus extension where the extension handles it automatically.
Apache Commons Logging:
Using Maven:
<dependency> <groupId>org.jboss.logging</groupId> <artifactId>commons-logging-jboss-logging</artifactId> </dependency>
Using Gradle:
implementation("org.jboss.logging:commons-logging-jboss-logging")
Log4j:
Using Maven:
<dependency> <groupId>org.jboss.logmanager</groupId> <artifactId>log4j-jboss-logmanager</artifactId> </dependency>
Using Gradle:
implementation("org.jboss.logmanager:log4j-jboss-logmanager")
Log4j 2:
Using Maven:
<dependency> <groupId>org.jboss.logmanager</groupId> <artifactId>log4j2-jboss-logmanager</artifactId> </dependency>
Using Gradle:
implementation("org.jboss.logmanager:log4j2-jboss-logmanager")
NoteDo not include any Log4j dependencies, as the
log4j2-jboss-logmanager
library contains everything needed to use Log4j as a logging implementation.
SLF4J:
Using Maven:
<dependency> <groupId>org.jboss.slf4j</groupId> <artifactId>slf4j-jboss-logmanager</artifactId> </dependency>
Using Gradle:
implementation("org.jboss.slf4j:slf4j-jboss-logmanager")
- Verify whether the logs generated by the added library adhere to the same format as the other Quarkus logs.
1.11.2. Use MDC to add contextual log information
Quarkus overrides the logging Mapped Diagnostic Context (MDC) to improve compatibility with its reactive core.
1.11.2.1. Add and read MDC data
To add data to the MDC and extract it in your log output:
Use the
MDC
class to set the data.-
Add
import org.jboss.logmanager.MDC;
Set
MDC.put(…)
as shown in the example below:An example with JBoss Logging and
io.quarkus.logging.Log
package me.sample; import io.quarkus.logging.Log; import jakarta.ws.rs.GET; import jakarta.ws.rs.Path; import org.jboss.logmanager.MDC; import java.util.UUID; @Path("/hello/jboss") public class GreetingResourceJbossLogging { @GET @Path("/test") public String greeting() { MDC.put("request.id", UUID.randomUUID().toString()); MDC.put("request.path", "/hello/test"); Log.info("request received"); return "hello world!"; } }
-
Add
Configure the log format to use
%X{mdc-key}
:quarkus.log.console.format=%d{HH:mm:ss} %-5p request.id=%X{request.id} request.path=%X{request.path} [%c{2.}] (%t) %s%n
The resulting message contains the MDC data:
08:48:13 INFO request.id=c37a3a36-b7f6-4492-83a1-de41dbc26fe2 request.path=/hello/test [me.sa.GreetingResourceJbossLogging] (executor-thread-1) request received
1.11.2.2. MDC and supported logging APIs
Based on your logging API, use one of the following MDC classes:
-
Log4j 1 -
org.apache.log4j.MDC.put(key, value)
-
Log4j 2 -
org.apache.logging.log4j.ThreadContext.put(key, value)
-
SLF4J -
org.slf4j.MDC.put(key, value)
1.11.2.3. MDC propagation
In Quarkus, the MDC provider has a specific implementation for handling the reactive context, ensuring that MDC data is propagated during reactive and asynchronous processing.
As a result, you can still access the MDC data in various scenarios:
- After asynchronous calls, for example, when a REST client returns a Uni.
-
In code submitted to
org.eclipse.microprofile.context.ManagedExecutor
. -
In code executed with
vertx.executeBlocking()
.
If applicable, MDC data is stored in a duplicated context, which is an isolated context for processing a single task or request.
1.12. Logging configuration reference
Configuration property fixed at build time - All other configuration properties are overridable at runtime
Configuration property | Type | Default |
If enabled and a metrics extension is present, logging metrics are published.
Environment variable: | boolean |
|
The default minimum log level.
Environment variable: |
| |
This will decorate the stacktrace in dev mode to show the line in the code that cause the exception
Environment variable: | boolean |
|
The log level of the root category, which is used as the default log level for all categories. JBoss Logging supports Apache-style log levels:
In addition, it also supports the standard JDK log levels.
Environment variable: |
| |
The names of additional handlers to link to the root category. These handlers are defined in consoleHandlers, fileHandlers, or syslogHandlers.
Environment variable: | list of string | |
Type | Default | |
The minimum log level for this category. By default, all categories are configured with
To get runtime logging below
As an example, to get
Environment variable: | InheritableLevel |
|
The log level for this category.
Note that to get log levels below
Environment variable: | InheritableLevel |
|
The names of the handlers to link to this category.
Environment variable: | list of string | |
Specify whether this logger should send its output to its parent Logger
Environment variable: | boolean |
|
Type | Default | |
If console logging should be enabled
Environment variable: | boolean |
|
If console logging should go to
Environment variable: | boolean |
|
The log format. Note that this value is ignored if an extension is present that takes control of console formatting (e.g., an XML or JSON-format extension).
Environment variable: | string |
|
The console log level.
Environment variable: |
| |
Specify how much the colors should be darkened. Note that this value is ignored if an extension is present that takes control of console formatting (e.g., an XML or JSON-format extension).
Environment variable: | int |
|
The name of the filter to link to the console handler.
Environment variable: | string | |
Indicates whether to log asynchronously
Environment variable: | boolean |
|
The queue length to use before flushing writing
Environment variable: | int |
|
Determine whether to block the publisher (rather than drop the message) when the queue is full
Environment variable: |
|
|
Type | Default | |
If file logging should be enabled
Environment variable: | boolean |
|
The log format
Environment variable: | string |
|
The level of logs to be written into the file.
Environment variable: |
| |
The name of the file in which logs will be written.
Environment variable: |
| |
The name of the filter to link to the file handler.
Environment variable: | string | |
The character encoding used
Environment variable: | ||
Indicates whether to log asynchronously
Environment variable: | boolean |
|
The queue length to use before flushing writing
Environment variable: | int |
|
Determine whether to block the publisher (rather than drop the message) when the queue is full
Environment variable: |
|
|
The maximum log file size, after which a rotation is executed.
Environment variable: |
| |
The maximum number of backups to keep.
Environment variable: | int |
|
The file handler rotation file suffix. When used, the file will be rotated based on its suffix.
The suffix must be in a date-time format that is understood by Example fileSuffix: .yyyy-MM-dd Note: If the suffix ends with .zip or .gz, the rotation file will also be compressed.
Environment variable: | string | |
Indicates whether to rotate log files on server initialization.
You need to either set a
Environment variable: | boolean |
|
Type | Default | |
If syslog logging should be enabled
Environment variable: | boolean |
|
The IP address and port of the Syslog server
Environment variable: | host:port |
|
The app name used when formatting the message in RFC5424 format
Environment variable: | string | |
The name of the host the messages are being sent from
Environment variable: | string | |
Sets the facility used when calculating the priority of the message as defined by RFC-5424 and RFC-3164
Environment variable: |
|
|
Set the
Environment variable: |
|
|
Sets the protocol used to connect to the Syslog server
Environment variable: |
|
|
If enabled, the message being sent is prefixed with the size of the message
Environment variable: | boolean |
|
Set to
Environment variable: | boolean |
|
Enables or disables blocking when attempting to reconnect a
Environment variable: | boolean |
|
The log message format
Environment variable: | string |
|
The log level specifying what message levels will be logged by the Syslog logger
Environment variable: |
| |
The name of the filter to link to the file handler.
Environment variable: | string | |
The maximum length, in bytes, of the message allowed to be sent. The length includes the header and the message.
If not set, the default value is
Environment variable: | ||
Indicates whether to log asynchronously
Environment variable: | boolean |
|
The queue length to use before flushing writing
Environment variable: | int |
|
Determine whether to block the publisher (rather than drop the message) when the queue is full
Environment variable: |
|
|
Type | Default | |
If console logging should be enabled
Environment variable: | boolean |
|
If console logging should go to
Environment variable: | boolean |
|
The log format. Note that this value is ignored if an extension is present that takes control of console formatting (e.g., an XML or JSON-format extension).
Environment variable: | string |
|
The console log level.
Environment variable: |
| |
Specify how much the colors should be darkened. Note that this value is ignored if an extension is present that takes control of console formatting (e.g., an XML or JSON-format extension).
Environment variable: | int |
|
The name of the filter to link to the console handler.
Environment variable: | string | |
Indicates whether to log asynchronously
Environment variable: | boolean |
|
The queue length to use before flushing writing
Environment variable: | int |
|
Determine whether to block the publisher (rather than drop the message) when the queue is full
Environment variable: |
|
|
Type | Default | |
If file logging should be enabled
Environment variable: | boolean |
|
The log format
Environment variable: | string |
|
The level of logs to be written into the file.
Environment variable: |
| |
The name of the file in which logs will be written.
Environment variable: |
| |
The name of the filter to link to the file handler.
Environment variable: | string | |
The character encoding used
Environment variable: | ||
Indicates whether to log asynchronously
Environment variable: | boolean |
|
The queue length to use before flushing writing
Environment variable: | int |
|
Determine whether to block the publisher (rather than drop the message) when the queue is full
Environment variable: |
|
|
The maximum log file size, after which a rotation is executed.
Environment variable: |
| |
The maximum number of backups to keep.
Environment variable: | int |
|
The file handler rotation file suffix. When used, the file will be rotated based on its suffix.
The suffix must be in a date-time format that is understood by Example fileSuffix: .yyyy-MM-dd Note: If the suffix ends with .zip or .gz, the rotation file will also be compressed.
Environment variable: | string | |
Indicates whether to rotate log files on server initialization.
You need to either set a
Environment variable: | boolean |
|
Type | Default | |
If syslog logging should be enabled
Environment variable: | boolean |
|
The IP address and port of the Syslog server
Environment variable: | host:port |
|
The app name used when formatting the message in RFC5424 format
Environment variable: | string | |
The name of the host the messages are being sent from
Environment variable: | string | |
Sets the facility used when calculating the priority of the message as defined by RFC-5424 and RFC-3164
Environment variable: |
|
|
Set the
Environment variable: |
|
|
Sets the protocol used to connect to the Syslog server
Environment variable: |
|
|
If enabled, the message being sent is prefixed with the size of the message
Environment variable: | boolean |
|
Set to
Environment variable: | boolean |
|
Enables or disables blocking when attempting to reconnect a
Environment variable: | boolean |
|
The log message format
Environment variable: | string |
|
The log level specifying what message levels will be logged by the Syslog logger
Environment variable: |
| |
The name of the filter to link to the file handler.
Environment variable: | string | |
The maximum length, in bytes, of the message allowed to be sent. The length includes the header and the message.
If not set, the default value is
Environment variable: | ||
Indicates whether to log asynchronously
Environment variable: | boolean |
|
The queue length to use before flushing writing
Environment variable: | int |
|
Determine whether to block the publisher (rather than drop the message) when the queue is full
Environment variable: |
|
|
Type | Default | |
The message prefix to match
Environment variable: | list of string |
|
The new log level for the filtered message. Defaults to DEBUG.
Environment variable: |
|
A size configuration option recognizes strings in this format (shown as a regular expression): [0-9]+[KkMmGgTtPpEeZzYy]?
.
If no suffix is given, assume bytes.