Class LogIndex
- java.lang.Object
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- org.eclipse.jgit.lib.AnyObjectId
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- org.eclipse.jgit.lib.ObjectId
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- org.eclipse.jgit.internal.ketch.LogIndex
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- All Implemented Interfaces:
Serializable
,Comparable<AnyObjectId>
public class LogIndex extends ObjectId
An ObjectId for a commit extended with incrementing log index.For any two LogIndex instances,
A
is an ancestor ofC
reachable through parent edges in the graph ifA.index < C.index
. LogIndex provides a performance optimization for Ketch, the same information can be obtained fromRevWalk
.Index values are only valid within a single
KetchLeader
instance after it has won an election. By restricting scope to a single leader new leaders do not need to traverse the entire history to determine the nextindex
for new proposals. This differs from Raft, where leader election uses the log index and the term number to determine which replica holds a sufficiently up-to-date log. Since Ketch uses Git objects for storage of its replicated log, it keeps the term number as Raft does but uses standard Git operations to imply the log index.Round.runAsync(AnyObjectId)
bumps the index as each new round is constructed.- See Also:
- Serialized Form
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description String
describeForLog()
Create string suitable for debug logging containing the log index and abbreviated ObjectId.long
getIndex()
Get index provided by the current leader instance.String
toString()
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Methods inherited from class org.eclipse.jgit.lib.ObjectId
equals, fromRaw, fromRaw, fromRaw, fromRaw, fromString, fromString, isId, toObjectId, toString, zeroId
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Method Detail
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getIndex
public long getIndex()
Get index provided by the current leader instance.- Returns:
- index provided by the current leader instance.
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describeForLog
public String describeForLog()
Create string suitable for debug logging containing the log index and abbreviated ObjectId.- Returns:
- string suitable for debug logging containing the log index and abbreviated ObjectId.
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toString
public String toString()
- Overrides:
toString
in classAnyObjectId
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