Package org.eclipse.jgit.util.time
Class MonotonicSystemClock
java.lang.Object
org.eclipse.jgit.util.time.MonotonicSystemClock
- All Implemented Interfaces:
MonotonicClock
A
MonotonicClock
based on
System.currentTimeMillis
.- Since:
- 4.6
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Field Summary
Fields -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionprivate static long
propose()
Obtain a timestamp close to "now".
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Field Details
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before
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Constructor Details
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MonotonicSystemClock
public MonotonicSystemClock()
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Method Details
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nowMicros
private static long nowMicros() -
propose
Obtain a timestamp close to "now".Proposed times are close to "now", but may not yet be certainly in the past. This allows the calling thread to interleave other useful work while waiting for the clock instance to create an assurance it will never in the future propose a time earlier than the returned time.
A hypothetical implementation could read the local system clock (managed by NTP) and return that proposal, concurrently sending network messages to closely collaborating peers in the same cluster to also ensure their system clocks are ahead of this time. In such an implementation the
ProposedTimestamp.blockUntil(Duration)
method would wait for replies from the peers indicating their own system clocks have moved past the proposed time.- Specified by:
propose
in interfaceMonotonicClock
- Returns:
- a
ProposedTimestamp
object.
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