Package com.xceptance.xlt.api.engine

Interface Data

All Known Implementing Classes:
AbstractData, ActionData, CustomData, CustomValue, EventData, PageLoadTimingData, RequestData, TimerData, TransactionData, WebVitalData
public interface Data
The Data interface defines the minimum functionality any data record must implement to be recordable by the XLT engine. Typically, the XLT engine already collects sufficient data (e.g. error and run time values). However, it may be necessary to log other important values as well. For this, a new data record type needs to be created, either by implementing this interface or - preferably - by extending from one of the already existing data record types.

Such a data record class must obey the following rules:

  • it must define a type code character to enable XLT to tell one type of data record from the other (Note that the type codes 'A', 'C', 'E', 'J', 'P', 'R', 'T', 'V', and 'W' are already used by the XLT engine.)
  • it must have a name
  • it must have a time stamp
  • it must be able to serialize its state as a list of strings
  • it must be able to reconstruct its state from a list of strings
Serialization and reconstruction: Note that toList() on the one side and setBaseValues(List) and setRemainingValues(List) on the other side work inversely. The data produced by toList() during a load test will later be passed to setBaseValues(List) and setRemainingValues(List) during report creation. It is the programmer's responsibility to ensure that the implementation of these methods is in sync.

The data record can be logged using the DataManager.

  • Method Summary

    Modifier and Type
    Method
    Description
    String
    getAgentName()
    Returns the name of the agent that produced this data record.
    String
    getName()
    Returns the name of this data record.
    long
    getTime()
    Returns the time when the event occurred that this data record was created for.
    String
    getTransactionName()
    Returns the name of the transaction that produced this data record.
    char
    getTypeCode()
    Returns the type code of this data record.
    void
    setAgentName(String agentName)
    Sets the name of the agent that produced this data record.
    void
    setBaseValues(List<XltCharBuffer> values)
    Called by XLT during report creation to recreate the base object state (type code, name, and timestamp) from the passed string list.
    void
    setName(String name)
    Sets the name of this data record.
    void
    setRemainingValues(List<XltCharBuffer> values)
    Called by XLT during report creation to recreate the remaining object state from the passed string list.
    void
    setTime(long time)
    Sets the time when this record's event occurred.
    void
    setTransactionName(String transactionName)
    Sets the name of the transaction that produced this data record.
    List<String>
    toList()
    Called by XLT during a load test to return the full state of the object as a list of strings.

  • Method Details

    • toList

      List<String> toList()
      Called by XLT during a load test to return the full state of the object as a list of strings. The first three entries have to be, in this order, the type code, the name, and the timestamp. All remaining entries and their order are specific to the concrete implementation class.
      Returns:
      the list of values that form the state of this object
      See Also:

    • setBaseValues

      void setBaseValues(List<XltCharBuffer> values)
      Called by XLT during report creation to recreate the base object state (type code, name, and timestamp) from the passed string list. The remaining values may later be initialized by calling setRemainingValues(List) with the same list of values. Splitting the process of recreating the full object state into two methods is purely for performance reasons as the second step is not always needed.
      Parameters:
      values - the string list to recreate the object state from
      See Also:

    • setRemainingValues

      void setRemainingValues(List<XltCharBuffer> values)
      Called by XLT during report creation to recreate the remaining object state from the passed string list. The base values have already been initialized by calling setBaseValues(List) with the same list of values. Splitting the process of recreating the full object state into two methods is purely for performance reasons as the second step is not always needed.
      Parameters:
      values - the string list to recreate the object state from
      See Also:

    • getAgentName

      String getAgentName()
      Returns the name of the agent that produced this data record. Only used during report generation or analysis.
      Returns:
      the agent's name

    • getName

      String getName()
      Returns the name of this data record.
      Returns:
      the name

    • getTime

      long getTime()
      Returns the time when the event occurred that this data record was created for.
      Returns:
      the time

    • getTransactionName

      String getTransactionName()
      Returns the name of the transaction that produced this data record. Only used during report generation or analysis.
      Returns:
      the transaction's name

    • getTypeCode

      char getTypeCode()
      Returns the type code of this data record.
      Returns:
      the type code

    • setAgentName

      void setAgentName(String agentName)
      Sets the name of the agent that produced this data record. Only used during report generation or analysis.
      Parameters:
      agentName - the agent's name

    • setName

      void setName(String name)
      Sets the name of this data record.
      Parameters:
      name - the name

    • setTime

      void setTime(long time)
      Sets the time when this record's event occurred. To obtain the timestamp, please use GlobalClock.millis().
      Parameters:
      time - the timestamp

    • setTransactionName

      void setTransactionName(String transactionName)
      Sets the name of the transaction that produced this data record. Only used during report generation or analysis.
      Parameters:
      transactionName - the transaction's name