Activiti系列：是否可以让某些流程的信息写到历史表，而另外一些不写？

public void recordProcessInstanceStart(ExecutionEntity processInstance) {
    if(isHistoryLevelAtLeast(HistoryLevel.ACTIVITY)) {
      HistoricProcessInstanceEntity historicProcessInstance = new HistoricProcessInstanceEntity(processInstance);
      
      // Insert historic process-instance
      getDbSqlSession().insert(historicProcessInstance);
	  ....
}

public boolean isHistoryLevelAtLeast(HistoryLevel level) {
    if(log.isDebugEnabled()) {
      log.debug("Current history level: {}, level required: {}", historyLevel, level);
    }
    // Comparing enums actually compares the location of values declared in the enum
    return historyLevel.isAtLeast(level);
  }

/**
 * Enum that contains all possible history-levels. 
 * 
 * @author Frederik Heremans
 */
public enum HistoryLevel {
  
  NONE("none"),
  ACTIVITY("activity"),
  AUDIT("audit"),
  FULL("full");
  
  private String key;
  
  private HistoryLevel(String key) {
    this.key = key;
  }
  
  /**
   * @param key string representation of level
   * @return {@link HistoryLevel} for the given key
   * @throws ActivitiException when passed in key doesn‘t correspond to existing level
   */
  public static HistoryLevel getHistoryLevelForKey(String key) {
    for(HistoryLevel level : values()) {
      if(level.key.equals(key)) {
        return level;
      }
    }
    throw new ActivitiIllegalArgumentException("Illegal value for history-level: " + key);
  }
  /**
   * String representation of this history-level.
   */
  public String getKey() {
    return key;
  }
  
  /**
   * Checks if the given level is the same as, or higher in order than the
   * level this method is executed on.
   */
  public boolean isAtLeast(HistoryLevel level) {
    // Comparing enums actually compares the location of values declared in the enum
    return this.compareTo(level) >= 0;
  }
}