Hi, patch [1] introducing ToStringBuilder was merged to master a few days ago and hopefully additional fixes [2] for ToStringBuilder will be merged soon. ToStringBuilder is a helper class which eases implementation of toString() method, which usually contains a lot of class info for logging purposes. For example take a look at following class: public class Test { private boolean flag; private int number; private List<String> messages; private String password; ... } Using ToStringBuilder we can easily create toString() method: @Override public String toString() { return ToStringBuilder.forInstance(this) .append("flag", flag) .append("number", getNumber()) .append("message", getMessages) .appendFiltered("password", getPassword()) .build(); } Using this toString() method we will receive following output (assuming that attributes as filled in with values): Test:{flag='false', number='0', message='[msg1, msg2]', password='***'} For more information about ToStringBuilder please take a look at source code which is documented by JavaDoc. It would be great if we start to use this builder in engine code, so I created patch [3] which refactors existing relevant toString() methods to use ToStringBuilder. Thanks Martin Perina [1] https://gerrit.ovirt.org/39240 [2] https://gerrit.ovirt.org/39720 [3] https://gerrit.ovirt.org/39721