GitHub user DennisYudin edited a discussion: [ERROR] class file for
org.apache.logging.log4j.Logger not found
Hi there i've got some troubles with log4j2 and I hope someone will help me.
Here's a thing.
I've got a small multi-module jakartaEE project and I'm getting Compilation
failure which says:
> error: cannot access Logger
> [ERROR] class file for org.apache.logging.log4j.Logger not found
This happends when I try to compile one of my module.
The Idea is simple I've got a log4j2 wrapper in one module which looks like
this:
```
public class Log4jHelper implements LogHelper {
private static final String TR_EXT_ID_NAME = "[extTrId: %d] ";
private static final String TR_ID_N_EXT_ID_NAME = "[trId: %d, extTrId:
%d] ";
private static final String TR_ID_NAME = "[trId: %d] ";
private static final Map<Class<? extends Throwable>, Level> exceptions
= new ConcurrentHashMap<>();
private final Logger log;
private Log4jHelper(Logger log) {
this.log = log;
}
public static LogHelper getLogger(Class<?> clazz) {
return new Log4jHelper(LogManager.getLogger(clazz));
}
public static LogHelper getLogger(Logger log) {
return new Log4jHelper(log);
}
public static void registerException(Class<? extends Throwable> clazz,
Level level) {
exceptions.put(clazz, level);
}
@Override
public void debug(Long trId, Long extTrId, String msg, Object...
params) {
log(Level.DEBUG, trId, extTrId, null, msg, params);
}
// and other methods
```
And in another module I try to use it
I added module with logging as dependecy to another module where I wanna use it
```
<dependency>
<groupId>com.packt.cookbook.libraries</groupId>
<artifactId>common</artifactId>
<version>${project.version}</version>
</dependency>
```
and after that Im trying to use it
```
@Path("members")
@RequestScoped
public class MemberRESTService {
private static final LogHelper log =
Log4jHelper.getLogger(MemberRESTService.class);
@Inject
private Validator validator;
@Inject
private MemberRepository repository;
@Inject
private Registration registration;
@PostConstruct
public void init() {
log.info("WEB module: logging is working...");
}
```
and when I run `mvn clean compile` command Im getting Compilation failure.
When I add to the pom of my second module log4j-api dependency, problem is gone.
```
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<scope>provided</scope>
</dependency>
```
But when I run `mvn dependency:analyze` I can see the message:
```
Unused declared dependencies found:
[WARNING] org.apache.logging.log4j:log4j-api:jar:2.23.1:provided
```
I think is not OK.
[Project repo: ]https://github.com/DennisYudin/simple-ear-jakartaee10
I would appreciate for any help!
GitHub link: https://github.com/apache/logging-log4j2/discussions/4046
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