uschindler commented on pull request #536:
URL: https://github.com/apache/solr/pull/536#issuecomment-1015287079
For the record this is how to use log4j (just some debugging example
copypasted):
```
static final class LoggingAccessLog extends AbstractLifeCycle
implements RequestLog {
private final org.apache.logging.log4j.Logger log;
public LoggingAccessLog(String logname) {
this.log =
org.apache.logging.log4j.LogManager.getLogger(logname);
}
@Override
public void log(Request req, Response resp) {
final StringBuilder line=new StringBuilder("From: ")
.append(req.getRemoteHost())
.append("; Req:
\"").append(req.getMethod()).append(' ').append(req.getRequestURI());
final String query = req.getQueryString();
if (query != null) {
line.append('?').append(query);
}
line.append(' ').append(req.getProtocol()).append("\";
Status: ").append(resp.getStatus()).append("; Bytes:
").append(resp.getContentCount());
final String
referer=req.getHeader(HttpHeader.REFERER.asString());
if (referer!=null) line.append("; Referer:
\"").append(referer).append('"');
final String
userAgent=req.getHeader(HttpHeader.USER_AGENT.asString());
if (userAgent!=null) line.append("; User-Agent:
\"").append(userAgent).append('"');
if (req.isSecure()) line.append("; secure");
log.info(line.toString());
}
}
```
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