Package org.apache.druid.server.compaction

Class FixedIntervalOrderPolicy

java.lang.Object

org.apache.druid.server.compaction.FixedIntervalOrderPolicy

All Implemented Interfaces:

CompactionCandidateSearchPolicy

public class FixedIntervalOrderPolicy
extends Object
implements CompactionCandidateSearchPolicy

Implementation of CompactionCandidateSearchPolicy that specifies the datasources and intervals eligible for compaction and their order.

This policy is primarily used for integration tests.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	FixedIntervalOrderPolicy.Candidate	Specifies a datasource-interval eligible for compaction.

Constructor Summary

Constructors

Constructor	Description
FixedIntervalOrderPolicy(List<FixedIntervalOrderPolicy.Candidate> eligibleCandidates)

Method Summary

Modifier and Type	Method	Description
int	compareCandidates(CompactionCandidate candidateA, CompactionCandidate candidateB)	Compares between two compaction candidates.
List<FixedIntervalOrderPolicy.Candidate>	getEligibleCandidates()
boolean	isEligibleForCompaction(CompactionCandidate candidate, CompactionStatus currentCompactionStatus, CompactionTaskStatus latestTaskStatus)	Checks if the given CompactionCandidate is eligible for compaction in the current iteration.

Methods inherited from class java.lang.Object

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

Constructor Details

FixedIntervalOrderPolicy

public FixedIntervalOrderPolicy(List<FixedIntervalOrderPolicy.Candidate> eligibleCandidates)

Method Details

getEligibleCandidates

public List<FixedIntervalOrderPolicy.Candidate> getEligibleCandidates()

compareCandidates

public int compareCandidates(CompactionCandidate candidateA,
 CompactionCandidate candidateB)

Description copied from interface: CompactionCandidateSearchPolicy

Compares between two compaction candidates. Used to determine the order in which segments and intervals should be picked for compaction.

Specified by:

compareCandidates in interface CompactionCandidateSearchPolicy

Returns:

A positive value if candidateA should be picked first, a negative value if candidateB should be picked first or zero if the order does not matter.

isEligibleForCompaction

public boolean isEligibleForCompaction(CompactionCandidate candidate,
 CompactionStatus currentCompactionStatus,
 CompactionTaskStatus latestTaskStatus)

Description copied from interface: CompactionCandidateSearchPolicy

Checks if the given CompactionCandidate is eligible for compaction in the current iteration. A policy may implement this method to skip compacting intervals or segments that do not fulfil some required criteria.

Specified by:

isEligibleForCompaction in interface CompactionCandidateSearchPolicy