code: private void parseSSLCertFile() {
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled()) {
              Tr.entry(tc, "parseSSLCertFile");
          }
  
          String fileName = null;
          String lineRead = null;
          BufferedReader bufferReader = null;
  
          // Obtain Default Cert Label
          certDefaultLabel = getProperty(PROTOCOL_HTTPS_CERT_DEFAULT_LABEL);
  
          // Obtain Cert Mapping File
          try {
              fileName = getProperty(PROTOCOL_HTTPS_CERT_MAPPING_FILE);
  
              if (fileName != null && 0 < fileName.length()) {
                  bufferReader = new BufferedReader(new FileReader(fileName));
  
                  // For each entry, parse the label and ip address
                  lineRead = bufferReader.readLine();
                  while (lineRead != null) {
                      extractSSLServerCert(lineRead.trim());
                      lineRead = bufferReader.readLine();
                  }
              }
          } catch (Exception e) {
              FFDCFilter.processException(e, getClass().getName(), "parseSSLCertFile", this);
              if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled())
                  Tr.debug(tc, "Error parsing file; " + e);
          } finally {
              if (null != bufferReader) {
                  try {
                      bufferReader.close();
                  } catch (IOException ioe) {
                      // ignore
                  }
              }
          }
  
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled()) {
              Tr.exit(tc, "parseSSLCertFile");
          }
      }
docs: Parse Server SSL Certificate Mapping File.