com.pervasive.datarush.graphs

Class LogicalStatistic

java.lang.Object

com.pervasive.datarush.graphs.LogicalStatistic

All Implemented Interfaces:

Serializable, Comparable<LogicalStatistic>

public final class LogicalStatistic
extends Object
implements Serializable, Comparable<LogicalStatistic>

Statistic associated with a LogicalPort or a LogicalOperator. Statistics are keyed by the following items:

• definition, where definition provides the definition of the statistic
• path, where path provides the path of the port or operator
• nodeID, where nodeID provides the host and thread offset within the host.

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	LogicalStatistic.Builder A builder for statistics.

Method Summary

Modifier and Type	Method and Description
int	compareTo(LogicalStatistic other)
StatisticDefinition<?>	definition() Returns the definition associated with this statistic.
LogicalStatistic	finalSnapshot() Returns a snapshot view of these statistics with all statistics appropriate for a graph that is in a terminated state.
VirtualNodeID	nodeID() Returns the node described by this statistics object.
VirtualNodeID	originalNodeID() Returns the original node described by this statistics object.
GraphPath	path() Returns the full path of the port or operator described by this statistics object.
LogicalStatistic	snapshot() Returns a snapshot view of these statistics.
RuntimeStatistic<?>	statistic() Returns the pair of definition() and supplier().
StatisticSupplier	supplier() Returns the supplier associated with this statistic.
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Method Detail

path

public GraphPath path()

Returns the full path of the port or operator described by this statistics object.

Returns:

the full path

nodeID

public VirtualNodeID nodeID()

Returns the node described by this statistics object.

Returns:

the node

originalNodeID

public VirtualNodeID originalNodeID()

Returns the original node described by this statistics object. This will normally be the same as nodeID(). In the event of a failure, this represents the node that failed, where this unit of work was originally scheduled.

Returns:

the original node ID

snapshot

public LogicalStatistic snapshot()

Returns a snapshot view of these statistics. A snapshot view is guaranteed not to change as the graph executes.

Returns:

a snapshot view of these statistics

finalSnapshot

public LogicalStatistic finalSnapshot()

Returns a snapshot view of these statistics with all statistics appropriate for a graph that is in a terminated state.

Returns:

a snapshot view of these statistics

statistic

public RuntimeStatistic<?> statistic()

Returns the pair of definition() and supplier().

Returns:

the definition and supplier pair;

definition

public StatisticDefinition<?> definition()

Returns the definition associated with this statistic. Determines metadata for this statistic including display name and how the statistic is to be aggregated across partitions.

Returns:

the definition.

supplier

public StatisticSupplier supplier()

Returns the supplier associated with this statistic. This controls the instrumentation for this statistic if this statistic is live. Otherwise, if this statistic is a snapshot, the supplier is an immutable value holder.

Returns:

the supplier for this statistic

compareTo

public int compareTo(LogicalStatistic other)

Specified by:

compareTo in interface Comparable<LogicalStatistic>

toString

public String toString()

Overrides:

toString in class Object