com.bigdata.relation.rule.eval
Class RuleLog

java.lang.Object
  com.bigdata.relation.rule.eval.RuleLog

public class RuleLog
extends Object

Class defines the log on which rule execution statistics are written. This covers both query evaluation and mutation operations such as fixed point closure of a rule set.

Version:

$Id: RuleLog.java 3448 2010-08-18 20:55:58Z thompsonbry $

Author:

Bryan Thompson

Field Summary

protected static org.apache.log4j.Logger

log

Constructor Summary

RuleLog()

Method Summary

static void	log(IRule rule, IRuleState ruleState, JoinStats[] joinStats) Log distributed join execution statistics using a CSV format.
static void	log(RuleStats stats) Log rule execution statistics.

Methods inherited from class java.lang.Object

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

Field Detail

log

protected static final transient org.apache.log4j.Logger log

Constructor Detail

RuleLog

public RuleLog()

Method Detail

log

public static void log(RuleStats stats)

Log rule execution statistics.

Parameters:

stats - The rule execution statistics.

log

public static void log(IRule rule,
                       IRuleState ruleState,
                       JoinStats[] joinStats)

Log distributed join execution statistics using a CSV format.

Parameters:

rule - The IRule whose JoinStats are being reported.

ruleState - Contains details about evaluation order for the IPredicates in the tail of the rule, the access paths that were used, etc.

joinStats - The statistics for the distributed join tasks for each join dimension in the rule.