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https://issues.apache.org/jira/browse/JAMES-2171?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16716422#comment-16716422
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ASF GitHub Bot commented on JAMES-2171:
---------------------------------------

Github user chibenwa commented on a diff in the pull request:

    https://github.com/apache/james-project/pull/145#discussion_r240499957
  
    --- Diff: 
mailet/standard/src/main/java/org/apache/james/transport/mailets/LogMessage.java
 ---
    @@ -73,9 +136,15 @@ public void init() {
                 headers = getInitParameter("headers", true);
                 body = getInitParameter("body", true);
                 bodyMax = (getInitParameter("maxBody") == null) ? 0 : 
Integer.parseInt(getInitParameter("maxBody"));
    +            if(bodyMax < 0){
    +                logger.error("Parsed a negative maxBody value and caused 
initialization failure");
    +                throw new IllegalArgumentException("The value of maxBody 
cannot be negative.");
    +            }
                 comment = getInitParameter("comment");
    -        } catch (Exception e) {
    -            logger.error("Caught exception while initializing LogMessage", 
e);
    +        } catch (NumberFormatException e){
    +            logger.error("Caught exception while parsing maxBody value", 
e);
    --- End diff --
    
    I would argue that we don't want to start with an invalid configuration. 
Maybe catching these exceptions is not needed?


> LogMessage mailet improvments
> -----------------------------
>
>                 Key: JAMES-2171
>                 URL: https://issues.apache.org/jira/browse/JAMES-2171
>             Project: James Server
>          Issue Type: Improvement
>          Components: Mailet Contributions
>    Affects Versions: master
>            Reporter: Tellier Benoit
>            Priority: Major
>              Labels: easyfix, newbie
>
> Today, one can use the LogMessage to generate log messages upon mail reception
> But the LogMessage have the following limits:
>  - It do not let you configure the warn level
>  - It does generate several logs. One would be simpler to review.
>  - It does add some unneeded informations, like mail name already carried by 
> the MDC
>  - It does not allow logging of specific headers or specific attributeNames. 
> This leads to missing information as well as "to much information".
>  - The code quality of the mailet is poor.
> You will:
>  - Ensure a single log message will be generated. For this you will call the 
> logger one time and concatenate log messages parts.
>  - Remove the log line with mail name.
>  - Add a **level** configuration option. It can takes value **warn**, 
> **info**, **debug** or **error**. It will be used to set the logger log level.
>  - Add a **specificHeaders** configuration option. It takes a comma separated 
> list of header names to include in the log message. By default it is empty.
>  - Add a **specificAttributes** configuration option.  It takes a comma 
> separated list of attribute names to be included in the log message. By 
> default it is empty.
>  - **body** configuration option should be false by default
>  - **header** configuration option should be false by default
>  - **init** should propagate exception while initilizing (Integer parse 
> exception, also passing a negative max body should throw.)
>  - Remove inlined affectation for field. They can be unset on their 
> declaration and set when init is called.
> Correct *LogMessageTest* accordingly.
> Don't hesitate to reach us on the *gitter* chat if you have any question.



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