openHAB

Module: OpenHAB::Core::Items::Persistence

Included in:
GenericItem
Defined in:
lib/openhab/core/items/persistence.rb

Overview

Items extensions to support openHAB's Persistence feature.

Examples:

The following examples are based on these items

Number        UV_Index
Number:Power  Power_Usage "Power Usage [%.2f W]"

Getting persistence data from the system default persistence service

UV_Index.average_since(1.hour.ago)      # returns a DecimalType
Power_Usage.average_since(12.hours.ago) # returns a QuantityType that corresponds to the item's type

Querying a non-default persistence service

UV_Index.average_since(1.hour.ago, :influxdb)
Power_Usage.average_since(12.hours.ago, :rrd4j)

Time of day shortcuts

# Persistence methods accept any object that responds to #to_zoned_date_time, which includes
# LocalTime, LocalDate, and Ruby's Time, Date, and DateTime.
# This allows for easy querying of start of day
logger.info Power_Usage.average_since(LocalTime::MIDNIGHT)
logger.info Power_Usage.average_since(LocalDate.now)
# Ruby's Date can be used too
logger.info Power_Usage.average_since(Date.today)

# Yesterday
logger.info Power_Usage.average_between(Date.today - 1, Date.today)
# or
logger.info Power_Usage.average_between(LocalDate.now - 1, LocalDate.now)

# When passing the local time, today's date is assumed
logger.info Power_Usage.average_between(LocalTime.parse("4pm"), LocalTime.parse("9pm"))
# or
logger.info Power_Usage.average_between(Time.parse("4pm"), Time.parse("9pm"))

# Beware that Date, LocalDate, and LocalTime arithmetics will produce the same type, so
Power_Usage.average_between(LocalTime.parse("4pm") - 1.day, LocalTime.parse("9pm") - 1.day)
# Will still give you TODAY's data between 4pm and 9pm
# To get yesterday's data, use Time.parse, i.e.
Power_Usage.average_between(Time.parse("4pm") - 1.day, Time.parse("9pm") - 1.day)

Comparison using Quantity

# Because Power_Usage has a unit, the return value
# from average_since is a QuantityType
if Power_Usage.average_since(15.minutes.ago) > 5 | "kW"
  logger.info("The power usage exceeded its 15 min average)
end

PersistedState

max = Power_Usage.maximum_since(LocalTime::MIDNIGHT)
logger.info("Max power usage today: #{max}, at: #{max.timestamp})

See Also:

Defined Under Namespace

Classes: PersistedState

Constant Summary collapse

HistoricState =
Deprecated.

Use PersistedState instead

PersistedState

Instance Method Summary collapse

Instance Method Details

#all_states_between(start, finish, service = nil) ⇒ Array<PersistedState>

Returns all the states between two points in time.

Parameters:

  • start (#to_zoned_date_time) —

    The point in time from which to search

  • finish (#to_zoned_date_time) —

    The point in time to which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

Since:

  • openHAB 4.0




# File 'lib/openhab/core/items/persistence.rb', line 452

#all_states_since(timestamp, service = nil) ⇒ Array<PersistedState>

Returns all the states from a point in time until now.

Parameters:

  • timestamp (#to_zoned_date_time) —

    The point in time from which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

Since:

  • openHAB 4.0




# File 'lib/openhab/core/items/persistence.rb', line 438

#all_states_until(timestamp, service = nil) ⇒ Array<PersistedState>

Returns all the states between now until the given time.

Parameters:

  • timestamp (#to_zoned_date_time) —

    The point in time until which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

Since:

  • openHAB 4.2




# File 'lib/openhab/core/items/persistence.rb', line 445

#average_between(start, finish, service = nil) ⇒ DecimalType, ...

Returns the average value of the item's state between two points in time

Parameters:

  • start (#to_zoned_date_time) —

    The point in time from which to search

  • finish (#to_zoned_date_time) —

    The point in time to which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

  • (DecimalType, QuantityType, nil) —

    The average value between start and finish, or nil if no states could be found.




# File 'lib/openhab/core/items/persistence.rb', line 125

#average_since(timestamp, service = nil) ⇒ DecimalType, ...

Returns the average value of the item's state since the given time

Parameters:

  • timestamp (#to_zoned_date_time) —

    The point in time from which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

  • (DecimalType, QuantityType, nil) —

    The average value since timestamp, or nil if no previous states could be found.




# File 'lib/openhab/core/items/persistence.rb', line 110

#average_until(timestamp, service = nil) ⇒ DecimalType, ...

Returns the average value of the item's state between now until the given time

Parameters:

  • timestamp (#to_zoned_date_time) —

    The point in time until which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

  • (DecimalType, QuantityType, nil) —

    The average value until timestamp, or nil if no future states could be found.

Since:

  • openHAB 4.2




# File 'lib/openhab/core/items/persistence.rb', line 117

#changed_between?(start, finish, service = nil) ⇒ true, false

Whether the item's state changed between two points in time

Parameters:

  • start (#to_zoned_date_time) —

    The point in time from which to search

  • finish (#to_zoned_date_time) —

    The point in time to which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

  • (true, false) —

    True if the item's state changed between start and finish, False otherwise.




# File 'lib/openhab/core/items/persistence.rb', line 263

#changed_since?(timestamp, service = nil) ⇒ true, false

Whether the item's state has changed since the given time

Parameters:

  • timestamp (#to_zoned_date_time) —

    The point in time from which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

  • (true, false) —

    True if the item's state has changed since the given timestamp, False otherwise.




# File 'lib/openhab/core/items/persistence.rb', line 250

#changed_until?(timestamp, service = nil) ⇒ true, false

Whether the item's state has changed between now until the given time

Parameters:

  • timestamp (#to_zoned_date_time) —

    The point in time until which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

  • (true, false) —

    True if the item's state has changed until the given timestamp, False otherwise.

Since:

  • openHAB 4.2




# File 'lib/openhab/core/items/persistence.rb', line 256

#count_between(start, finish, service = nil) ⇒ Integer

Returns the number of available data points between two points in time.

Parameters:

  • start (#to_zoned_date_time) —

    The point in time from which to search

  • finish (#to_zoned_date_time) —

    The point in time to which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

  • (Integer) —

    The number of values persisted for this item.




# File 'lib/openhab/core/items/persistence.rb', line 411

#count_since(timestamp, service = nil) ⇒ Integer

Returns the number of available historic data points from a point in time until now.

Parameters:

  • timestamp (#to_zoned_date_time) —

    The point in time from which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

  • (Integer) —

    The number of values persisted for this item.




# File 'lib/openhab/core/items/persistence.rb', line 398

#count_state_changes_between(start, finish, service = nil) ⇒ Integer Also known as: state_changes_between

Returns the number of changes in data points between two points in time.

Parameters:

  • start (#to_zoned_date_time) —

    The point in time from which to search

  • finish (#to_zoned_date_time) —

    The point in time to which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

  • (Integer) —

    The number of values persisted for this item.




# File 'lib/openhab/core/items/persistence.rb', line 431

#count_state_changes_since(timestamp, service = nil) ⇒ Integer Also known as: state_changes_since

Returns the number of changes in historic data points from a point in time until now.

Parameters:

  • timestamp (#to_zoned_date_time) —

    The point in time from which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

  • (Integer) —

    The number of values persisted for this item.




# File 'lib/openhab/core/items/persistence.rb', line 418

#count_state_changes_until(timestamp, service = nil) ⇒ Integer Also known as: state_changes_until

Returns the number of changes in data points between now until the given time.

Parameters:

  • timestamp (#to_zoned_date_time) —

    The point in time until which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

  • (Integer) —

    The number of values persisted for this item.

Since:

  • openHAB 4.2




# File 'lib/openhab/core/items/persistence.rb', line 424

#count_until(timestamp, service = nil) ⇒ Integer

Returns the number of available data points between now until the given time.

Parameters:

  • timestamp (#to_zoned_date_time) —

    The point in time until which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

  • (Integer) —

    The number of values persisted for this item.

Since:

  • openHAB 4.2




# File 'lib/openhab/core/items/persistence.rb', line 404

#delta_between(start, finish, service = nil) ⇒ DecimalType, ...

Returns the difference value of the item's state between two points in time

Parameters:

  • start (#to_zoned_date_time) —

    The point in time from which to search

  • finish (#to_zoned_date_time) —

    The point in time to which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

  • (DecimalType, QuantityType, nil) —

    The difference value between start and finish, or nil if no states could be found.




# File 'lib/openhab/core/items/persistence.rb', line 148

#delta_since(timestamp, service = nil) ⇒ DecimalType, ...

Returns the difference value of the item's state since the given time

Parameters:

  • timestamp (#to_zoned_date_time) —

    The point in time from which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

  • (DecimalType, QuantityType, nil) —

    The difference value since timestamp, or nil if no previous states could be found.




# File 'lib/openhab/core/items/persistence.rb', line 133

#delta_until(timestamp, service = nil) ⇒ DecimalType, ...

Returns the difference value of the item's state between now until the given time

Parameters:

  • timestamp (#to_zoned_date_time) —

    The point in time until which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

  • (DecimalType, QuantityType, nil) —

    The difference value until timestamp, or nil if no future states could be found.

Since:

  • openHAB 4.2




# File 'lib/openhab/core/items/persistence.rb', line 140

#deviation_between(start, finish, service = nil) ⇒ DecimalType, ...

Returns the standard deviation of the item's state between two points in time

Parameters:

  • start (#to_zoned_date_time) —

    The point in time from which to search

  • finish (#to_zoned_date_time) —

    The point in time to which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

  • (DecimalType, QuantityType, nil) —

    The standard deviation between start and finish, or nil if no states could be found.




# File 'lib/openhab/core/items/persistence.rb', line 171

#deviation_since(timestamp, service = nil) ⇒ DecimalType, ...

Returns the standard deviation of the item's state since the given time

Parameters:

  • timestamp (#to_zoned_date_time) —

    The point in time from which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

  • (DecimalType, QuantityType, nil) —

    The standard deviation since timestamp, or nil if no previous states could be found.




# File 'lib/openhab/core/items/persistence.rb', line 156

#deviation_until(timestamp, service = nil) ⇒ DecimalType, ...

Returns the standard deviation of the item's state beetween now until the given time

Parameters:

  • timestamp (#to_zoned_date_time) —

    The point in time until which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

  • (DecimalType, QuantityType, nil) —

    The standard deviation until timestamp, or nil if no future states could be found.

Since:

  • openHAB 4.2




# File 'lib/openhab/core/items/persistence.rb', line 163

#evolution_rate(start, finish_or_service = nil, service = nil) ⇒ Object

Deprecated.

OH 4.2 this method is deprecated in OH 4.2 and may be removed in a future version




# File 'lib/openhab/core/items/persistence.rb', line 270

#evolution_rate_between(start, finish, service = nil) ⇒ DecimalType?

Returns the evolution rate of the item's state between two points in time

Parameters:

  • start (#to_zoned_date_time) —

    The point in time from which to search

  • finish (#to_zoned_date_time) —

    The point in time to which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

  • (DecimalType, nil) —

    The evolution rate between start and finish, or nil if no states could be found.

Since:

  • openHAB 4.2




# File 'lib/openhab/core/items/persistence.rb', line 307

#evolution_rate_since(timestamp, service = nil) ⇒ DecimalType?

Returns the evolution rate of the item's state since the given time

Parameters:

  • timestamp (#to_zoned_date_time) —

    The point in time from which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

  • (DecimalType, nil) —

    The evolution rate since timestamp, or nil if no previous states could be found.

Since:

  • openHAB 4.2




# File 'lib/openhab/core/items/persistence.rb', line 291

#evolution_rate_until(timestamp, service = nil) ⇒ DecimalType?

Returns the evolution rate of the item's state between now until the given time

Parameters:

  • timestamp (#to_zoned_date_time) —

    The point in time until which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

  • (DecimalType, nil) —

    The evolution rate until timestamp, or nil if no future states could be found.

Since:

  • openHAB 4.2




# File 'lib/openhab/core/items/persistence.rb', line 299

#historic_state(timestamp, service = nil) ⇒ PersistedState?

Deprecated.

In openHAB 4.2, use #persisted_state instead

Returns the the item's state at the given time

Parameters:

  • timestamp (#to_zoned_date_time) —

    The point in time at which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

  • (PersistedState, nil) —

    The item's state at timestamp, or nil if no previous state could be found.




# File 'lib/openhab/core/items/persistence.rb', line 316

#last_change(service = nil) ⇒ ZonedDateTime?

Returns the time the item was last changed.

Parameters:

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

Since:

  • openHAB 4.2




# File 'lib/openhab/core/items/persistence.rb', line 572

#last_update(service = nil) ⇒ ZonedDateTime?

Returns the time the item was last updated.

Parameters:

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:




# File 'lib/openhab/core/items/persistence.rb', line 560

#maximum_between(start, finish, service = nil) ⇒ PersistedState?

Returns the maximum value of the item's state between two points in time

Parameters:

  • start (#to_zoned_date_time) —

    The point in time from which to search

  • finish (#to_zoned_date_time) —

    The point in time to which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

  • (PersistedState, nil) —

    The maximum value between start and finish, or nil if no states could be found.




# File 'lib/openhab/core/items/persistence.rb', line 347

#maximum_since(timestamp, service = nil) ⇒ PersistedState?

Returns the maximum value of the item's state since the given time

Parameters:

  • timestamp (#to_zoned_date_time) —

    The point in time from which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

  • (PersistedState, nil) —

    The maximum value since timestamp, or nil if no previous states could be found.




# File 'lib/openhab/core/items/persistence.rb', line 332

#maximum_until(timestamp, service = nil) ⇒ PersistedState?

Returns the maximum value of the item's state between now until the given time

Parameters:

  • timestamp (#to_zoned_date_time) —

    The point in time until which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

  • (PersistedState, nil) —

    The maximum value until timestamp, or nil if no future states could be found.

Since:

  • openHAB 4.2




# File 'lib/openhab/core/items/persistence.rb', line 339

#median_between(start, finish, service = nil) ⇒ DecimalType, ...

Returns the median of the item's state between two points in time

Parameters:

  • start (#to_zoned_date_time) —

    The point in time from which to search

  • finish (#to_zoned_date_time) —

    The point in time to which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

Since:

  • openHAB 4.3




# File 'lib/openhab/core/items/persistence.rb', line 195

#median_since(timestamp, service = nil) ⇒ DecimalType, ...

Returns the median of the item's state since the given time

Parameters:

  • timestamp (#to_zoned_date_time) —

    The point in time from which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

Since:

  • openHAB 4.3




# File 'lib/openhab/core/items/persistence.rb', line 179

#median_until(timestamp, service = nil) ⇒ DecimalType, ...

Returns the median of the item's state beetween now until the given time

Parameters:

  • timestamp (#to_zoned_date_time) —

    The point in time until which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

Since:

  • openHAB 4.3




# File 'lib/openhab/core/items/persistence.rb', line 187

#minimum_between(start, finish, service = nil) ⇒ PersistedState?

Returns the minimum value of the item's state between two points in time

Parameters:

  • start (#to_zoned_date_time) —

    The point in time from which to search

  • finish (#to_zoned_date_time) —

    The point in time to which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

  • (PersistedState, nil) —

    The minimum value between start and finish, or nil if no states could be found.




# File 'lib/openhab/core/items/persistence.rb', line 370

#minimum_since(timestamp, service = nil) ⇒ PersistedState?

Returns the minimum value of the item's state since the given time

Parameters:

  • timestamp (#to_zoned_date_time) —

    The point in time from which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

  • (PersistedState, nil) —

    The minimum value since timestamp, or nil if no previous states could be found.




# File 'lib/openhab/core/items/persistence.rb', line 355

#minimum_until(timestamp, service = nil) ⇒ PersistedState?

Returns the minimum value of the item's state between now until the given time

Parameters:

  • timestamp (#to_zoned_date_time) —

    The point in time until which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

  • (PersistedState, nil) —

    The minimum value until timestamp, or nil if no future states could be found.

Since:

  • openHAB 4.2




# File 'lib/openhab/core/items/persistence.rb', line 362

#next_change(service = nil) ⇒ ZonedDateTime?

Returns the first future change time of the item.

Parameters:

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

See Also:

Since:

  • openHAB 4.2



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# File 'lib/openhab/core/items/persistence.rb', line 585

%i[last_update next_update last_change next_change].each do |method|
  # @deprecated OH 4.1 remove this guard when dropping OH 4.1
  next unless Actions::PersistenceExtensions.respond_to?(method)

  class_eval <<~RUBY, __FILE__, __LINE__ + 1
    def #{method}(service = nil)                            # def last_update(service = nil)
      service ||= persistence_service                       #   service ||= persistence_service
      result = Actions::PersistenceExtensions.#{method}(    #   result = Actions::PersistenceExtensions.last_update(
        self,                                               #     self,
        service&.to_s                                       #     service&.to_s
      )                                                     #   )
      wrap_result(result)                                   #   wrap_result(result)
    end                                                     # end
  RUBY
end

#next_state(service = nil, skip_equal: false) ⇒ PersistedState?

Return the next state of the item

Parameters:

  • skip_equal (true, false) (defaults to: false) —

    if true, skips equal state values and searches the first state not equal the current state

  • service (String) (defaults to: nil) —

    the name of the PersistenceService to use

Returns:

  • (PersistedState, nil) —

    the previous state or nil if no previous state could be found, or if the default persistence service is not configured or does not refer to a valid service

Since:

  • openHAB 4.2



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# File 'lib/openhab/core/items/persistence.rb', line 625

%i[previous_state next_state].each do |method|
  # @deprecated OH 4.1 remove this guard when dropping OH 4.1
  next unless Actions::PersistenceExtensions.respond_to?(method)

  class_eval <<~RUBY, __FILE__, __LINE__ + 1
    def #{method}(service = nil, skip_equal: false)       # def previous_state(service = nil, skip_equal: false)
      service ||= persistence_service                     #   service ||= persistence_service
      result = Actions::PersistenceExtensions.#{method}(  #   result = Actions::PersistenceExtensions.previous_state(
        self,                                             #     self,
        skip_equal,                                       #     skip_equal,
        service&.to_s                                     #     service&.to_s
      )                                                   #   )
      wrap_result(result, quantify: true)                 #   wrap_result(result, quantify: true)
    end                                                   # end
  RUBY
end

#next_update(service = nil) ⇒ ZonedDateTime?

Returns the first future update time of the item.

Parameters:

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

See Also:

Since:

  • openHAB 4.2




# File 'lib/openhab/core/items/persistence.rb', line 565

#persist(service = nil) ⇒ void #persist(timestamp, state, service = nil) ⇒ void #persist(time_series, service = nil) ⇒ void

Persist item state to the persistence service

Overloads:

  • #persist(service = nil) ⇒ void

    This method returns an undefined value.

    Persists the current state of the item

    Parameters:

    • service (Symbol, String) (defaults to: nil) —

      An optional persistence id instead of the default persistence service.

  • #persist(timestamp, state, service = nil) ⇒ void

    This method returns an undefined value.

    Persists a state at a given timestamp

    Parameters:

    • timestamp (#to_zoned_date_time) —

      The timestamp for the given state to be stored

    • state (Types::State, #to_s) —

      The state to be stored

    • service (Symbol, String) (defaults to: nil) —

      An optional persistence id instead of the default persistence service.

    Since:

    • openHAB 4.2

  • #persist(time_series, service = nil) ⇒ void

    This method returns an undefined value.

    Persists a time series

    Parameters:

    • time_series (Types::TimeSeries) —

      The time series of states to be stored

    • service (Symbol, String) (defaults to: nil) —

      An optional persistence id instead of the default persistence service.

    Since:

    • openHAB 4.2



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# File 'lib/openhab/core/items/persistence.rb', line 505

def persist(*args)
  # @deprecated OH 4.1 this if block content can be removed when dropping OH 4.1 support
  if Core.version < Core::V4_2
    raise ArgumentError, "wrong number of arguments (given #{args.size}, expected 0..1)" if args.size > 1

    service = args.last || persistence_service
    Actions::PersistenceExtensions.persist(self, service&.to_s)
    return
  end

  first_arg = args.first
  if first_arg.is_a?(TimeSeries)
    if args.size > 2
      raise ArgumentError,
            "wrong number of arguments to persist a time series (given #{args.size}, expected 1..2)"
    end

    service = args[1] || persistence_service
    Actions::PersistenceExtensions.java_send :persist,
                                             [Item.java_class, Types::TimeSeries.java_class, java.lang.String],
                                             self,
                                             first_arg,
                                             service&.to_s
  elsif first_arg.respond_to?(:to_zoned_date_time)
    unless args.size.between?(2, 3)
      raise ArgumentError, "wrong number of arguments to persist a state (given #{args.size}, expected 2..3)"
    end

    timestamp = first_arg.to_zoned_date_time
    state = format_update(args[1])
    service = args[2] || persistence_service
    Actions::PersistenceExtensions.java_send :persist,
                                             [Item.java_class,
                                              ZonedDateTime.java_class,
                                              org.openhab.core.types.State,
                                              java.lang.String],
                                             self,
                                             timestamp,
                                             state,
                                             service&.to_s

  else
    if args.size > 1
      raise ArgumentError,
            "wrong number of arguments to persist the current state (given #{args.size}, expected 0..1)"
    end
    service = first_arg || persistence_service
    Actions::PersistenceExtensions.java_send :persist,
                                             [Item.java_class, java.lang.String],
                                             self,
                                             service&.to_s

  end
end

#persisted_state(timestamp, service = nil) ⇒ PersistedState?

Returns the the item's state at the given time

Parameters:

  • timestamp (#to_zoned_date_time) —

    The point in time at which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

  • (PersistedState, nil) —

    The item's state at timestamp, or nil if no state could be found.

Since:

  • openHAB 4.2




# File 'lib/openhab/core/items/persistence.rb', line 324

#previous_state(service = nil, skip_equal: false) ⇒ PersistedState?

Return the previous state of the item

Parameters:

  • skip_equal (true, false) (defaults to: false) —

    if true, skips equal state values and searches the first state not equal the current state

  • service (String) (defaults to: nil) —

    the name of the PersistenceService to use

Returns:

  • (PersistedState, nil) —

    the previous state or nil if no previous state could be found, or if the default persistence service is not configured or does not refer to a valid service




# File 'lib/openhab/core/items/persistence.rb', line 601

#remove_all_states_between(start, finish, service = nil) ⇒ void

This method returns an undefined value.

Removes persisted data points between two points in time.

Parameters:

  • start (#to_zoned_date_time) —

    The point in time from which to remove

  • finish (#to_zoned_date_time) —

    The point in time to which to remove

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Since:

  • openHAB 4.2




# File 'lib/openhab/core/items/persistence.rb', line 474

#remove_all_states_since(timestamp, service = nil) ⇒ void

This method returns an undefined value.

Removes persisted data points since a certain point in time.

Parameters:

  • timestamp (#to_zoned_date_time) —

    The point in time from which to remove

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Since:

  • openHAB 4.2




# File 'lib/openhab/core/items/persistence.rb', line 460

#remove_all_states_until(timestamp, service = nil) ⇒ void

This method returns an undefined value.

Removes persisted data points from now until the given point in time.

Parameters:

  • timestamp (#to_zoned_date_time) —

    The point in time until which to remove

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Since:

  • openHAB 4.2




# File 'lib/openhab/core/items/persistence.rb', line 467

#sum_between(start, finish, service = nil) ⇒ DecimalType, ...

Returns the sum of the item's state between two points in time

Parameters:

  • start (#to_zoned_date_time) —

    The point in time from which to search

  • finish (#to_zoned_date_time) —

    The point in time to which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:




# File 'lib/openhab/core/items/persistence.rb', line 219

#sum_since(timestamp, service = nil) ⇒ DecimalType, ...

Returns the sum of the item's state since the given time

Parameters:

  • timestamp (#to_zoned_date_time) —

    The point in time from which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:




# File 'lib/openhab/core/items/persistence.rb', line 204

#sum_until(timestamp, service = nil) ⇒ DecimalType, ...

Returns the sum of the item's state between now until the given time

Parameters:

  • timestamp (#to_zoned_date_time) —

    The point in time until which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

Since:

  • openHAB 4.2




# File 'lib/openhab/core/items/persistence.rb', line 211

#updated_between?(start, finish, service = nil) ⇒ true, false

Whether the item's state was updated between two points in time

Parameters:

  • start (#to_zoned_date_time) —

    The point in time from which to search

  • finish (#to_zoned_date_time) —

    The point in time to which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

  • (true, false) —

    True if the item's state was updated between start and finish, False otherwise.




# File 'lib/openhab/core/items/persistence.rb', line 391

#updated_since?(timestamp, service = nil) ⇒ true, false

Whether the item's state has been updated since the given time

Parameters:

  • timestamp (#to_zoned_date_time) —

    The point in time from which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

  • (true, false) —

    True if the item's state has been updated since the given timestamp, False otherwise.




# File 'lib/openhab/core/items/persistence.rb', line 378

#updated_until?(timestamp, service = nil) ⇒ true, false

Whether the item's state will be updated between now until the given time

Parameters:

  • timestamp (#to_zoned_date_time) —

    The point in time until which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

  • (true, false) —

    True if the item's state will be updated until the given timestamp, False otherwise.

Since:

  • openHAB 4.2




# File 'lib/openhab/core/items/persistence.rb', line 384

#variance_between(start, finish, service = nil) ⇒ DecimalType, ...

Returns the variance of the item's state between two points in time

Parameters:

  • start (#to_zoned_date_time) —

    The point in time from which to search

  • finish (#to_zoned_date_time) —

    The point in time to which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:




# File 'lib/openhab/core/items/persistence.rb', line 242

#variance_since(timestamp, service = nil) ⇒ DecimalType, ...

Returns the variance of the item's state since the given time

Parameters:

  • timestamp (#to_zoned_date_time) —

    The point in time from which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:




# File 'lib/openhab/core/items/persistence.rb', line 227

#variance_until(timestamp, service = nil) ⇒ DecimalType, ...

Returns the variance of the item's state between now until the given time

Parameters:

  • timestamp (#to_zoned_date_time) —

    The point in time until which to search

  • service (Symbol, String) (defaults to: nil) —

    An optional persistence id instead of the default persistence service.

Returns:

Since:

  • openHAB 4.2




# File 'lib/openhab/core/items/persistence.rb', line 234