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Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
A logback converter to support an indent customer conversion specifier.

Note that the convert(ch.qos.logback.classic.spi.ILoggingEvent) method simply returns a java.lang.String with a single character based on the passed event's marker (if the marker is not recognised or no marker is present, a java.lang.String with a single space character is returned).

Actual indenting has not been implemented as it will affect trace performance. Using a suitable Boss trace filter it will be possible for Boss trace to format and indent as required anyway, hence indentation is not required by the service team.

public class IndentConverter extends ClassicConverter {
  private static Map<MarkerStringmarkerMap = new HashMap<MarkerString>();
  static {
    .put(..getValue(),     "i");
    .put(..getValue(),    "e");
    .put(..getValue(),     "f");
    .put(..getValue(),    "{");
    .put(..getValue(),     "}");
    .put(..getValue(),     "d");
  public String convert(ILoggingEvent event) {
    final Marker marker = event.getMarker();
    String indent = null;
    if (marker != nullindent = .get(marker);
    if (indent == nullindent = " ";
    return indent;
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