package org.lsst.ccs.config;
   
   import javax.persistence.Entity;
   import javax.persistence.GeneratedValue;
   import javax.persistence.Id;
   import java.io.Serializable;
   
   /**
    * Entries int his table are generated by reading the status bus where subsystem advertise their startup.
   * <P>
   * Though there is a "endTimestamp" it is possible that the end of an execution is "missed" by the system.
   * So finding the configuration at a precise moment in time may be complex.
   * <p>
   *     this can be done either by sorting (should be performed during a day task)
   *     or as a direct operation
   * <P>
   *   in this last case two operations should correlate:
   *   <UL>
   *       <LI> When creating a new entry with same subsystem name
   *       get all entries with same subsystem and where "timenext" is zero.
   *       put the timenext at current value and if "endTimeStampLimit" is max put the current time
   *        <LI> when looking for a precise entry in time.
   *        just operate a comparison between starttime and endTimeLimit
   *
   *   </UL>
   * @author bamade
   */
  // Date: 24/05/12
  
      @Entity
  public class RunHistory  implements Serializable {
      private static final long serialVersionUID = 927127673789827728L;
      @Id
      @GeneratedValue
      private long id ;
  
      private String subsystemName;
  
      private String configurationName;
  
      private String tag ;
  
      private long startTimestamp ;
      /**
       * used to tell that the <TT>startTimestamp</TT> is not real but was artificially reconstituted
       * (an unlikely event: end message received and start message lost)
       */
      private boolean startGuessed ;
  
      /**
       * Possible end of task: may be missing due to dysfunctional system.
       * So next occurence with same subsystem will replace by its own time.
       * Defaults to  STILL_VALID
       */
      private long endTimestampLimit = PackCst.STILL_VALID;
      /**
       * used to tall that the <TT>endTimestampLimit</TT> has been artificially set
       * to a value which is different from constant <TT>STILL_VALID</TT> : this
       * may happen when an "end" message is lost.
       */
      private boolean endGuessed ;
  
      /**
       * startTimestamp of next entry in time with same subsystem.
       * Defaults to zero
       */
      private long timeNext = 0L;
  
      RunHistory() {}
  
      public RunHistory(String subsystemName, String configurationName, String tag, long startTimestamp) {
          this.subsystemName = subsystemName;
          this.configurationName = configurationName;
          this.tag = tag;
          this.startTimestamp = startTimestamp;
      }
      ///////////////////////////// ACCESSORS/MUTATORS
  
      public long getId() {
          return id;
      }
  
       void setId(long id) {
          this.id = id;
      }
  
      public String getSubsystemName() {
          return subsystemName;
      }
  
       void setSubsystemName(String subsystemName) {
          this.subsystemName = subsystemName;
      }
  
      public String getConfigurationName() {
          return configurationName;
      }
  
       void setConfigurationName(String configurationName) {
         this.configurationName = configurationName;
     }
 
     public String getTag() {
         return tag;
     }
 
     void setTag(String tag) {
         this.tag = tag;
     }
 
     public long getStartTimestamp() {
         return startTimestamp;
     }
 
      void setStartTimestamp(long startTimestamp) {
         this.startTimestamp = startTimestamp;
     }
 
     public boolean isStartGuessed() {
         return startGuessed;
     }
 
     public void setStartGuessed(boolean startGuessed) {
         this.startGuessed = startGuessed;
     }
 
     public boolean isEndGuessed() {
         return endGuessed;
     }
 
     public void setEndGuessed(boolean endGuessed) {
         this.endGuessed = endGuessed;
     }
 
     public long getEndTimestampLimit() {
         return endTimestampLimit;
     }
 
     public void setEndTimestampLimit(long endTimestampLimit) {
         this.endTimestampLimit = endTimestampLimit;
     }
 
     public long getTimeNext() {
         return timeNext;
     }
 
     public void setTimeNext(long timeNext) {
         this.timeNext = timeNext;
     }
 }