how to debug or log info in bean

I am assuming this is component in OSGI.

I prefer using this library for logging, its very helpful, can you try to integrate this. Its simple

http://www.slf4j.org/manual.html

hi...

yes i am using it. but it is not printing to adobe error.log

and this java class is in <package>.components

what do you mean by component in OSGI?

In OSGI,

Can you open logger configuration and find out whether there is a separate log file configured for your class in  which this code is present.

Also please check what is the log level setup.

Are you able to see logs of other classes ?

Link: http://localhost:4502/system/console/configMgr

Can you please share snippet of your code?

Can you ensure that JAR files required are present in you OSGI.

as far as I can see the core bundle is present in

http://localhost:4502/system/console/bundles

http://localhost:4502/system/console/osgi-installer

I need to show a DAM asset file size in 1 of my components.

So I pass here URL as for example  /content/dam/project_name/<path>/filename.pdf

  private int getFileSize(URL url) {
        HttpURLConnection conn = null;
        try {
            log.info(" URL : " +  url.toString());
            conn = (HttpURLConnection) url.openConnection();
            log.info(" connected");
            conn.setRequestMethod("HEAD");
            conn.getInputStream();
            
            log.info(" input streem");
            
            return conn.getContentLength();
            
           
            
        } catch (IOException e) {
            e.printStackTrace();
            return -1;
        } finally {
            conn.disconnect();
        }
  }

Did you properly declare the logger:

/** Default log. */

protected final Logger log = LoggerFactory.getLogger(this.getClass());

the information is written to the aem log file too. 

What file are you looking in? 

So the bundle that contains your java code is empty?

Did you follow the guide[1] for adding Java classes to your OSGI bundle? It seems like your maven file has not been configured correctly to include the java class. After building you bundle, you should be able to unpack the jar file and see your class file.

Regards,

Opkar

[1] https://helpx.adobe.com/experience-manager/using/creating-osgi-bundles-digital-marketing.html

oh not mine was:

private final Logger log = LoggerFactory.getLogger(getClass());

I added this, compiled and deployed. but it is still not writing log.

should i restart?