public void setHostIgnored(boolean ignoreHost) {
    this.ignoreHost = ignoreHost ? Integer.valueOf(1) : Integer.valueOf(0);
  }
Sets whether this alert definition will ignore the hosts reporting the
alert and combine them all into a single alert entry.

@param ignoreHost {@code true} if this alert definition is to ignore hosts and
                  combine all alert instances into a single entry, {@code false}
                  otherwise.
ambari-server/src/main/java/org/apache/ambari/server/orm/entities/AlertDefinitionEntity.java