public static class PartitionedJCacheStatistics.PartitionedCacheStatisticsAggregator extends Object implements InvocableMap.StreamingAggregator, ExternalizableLite, PortableObject
BY_MEMBER, BY_PARTITION, PARALLEL, PRESENT_ONLY, RETAINS_ENTRIES, SERIAL
Constructor and Description |
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PartitionedCacheStatisticsAggregator()
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PartitionedCacheStatisticsAggregator(JCacheIdentifier id, ValueExtractor valueExtractor)
Constructs an aggregator to aggregate JCache Cache Statistics from all storage-enabled servers for a JCache implemented as a Partitioned Cache.
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Modifier and Type | Method and Description |
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boolean |
accumulate(InvocableMap.Entry entry)
Accumulate one entry into the result.
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int |
characteristics()
A bit mask representing the set of characteristics of this aggregator.
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boolean |
combine(Object partialResult)
Merge another partial result into the result.
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Object |
finalizeResult()
Return the final result of the aggregation.
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Object |
getPartialResult()
Return the partial result of the aggregation.
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protected void |
process(Object o) |
void |
readExternal(DataInput in)
Restore the contents of this object by loading the object's state from the passed DataInput object.
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void |
readExternal(PofReader in)
Restore the contents of a user type instance by reading its state using the specified PofReader object.
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InvocableMap.StreamingAggregator |
supply()
Create a new instance of this aggregator.
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void |
writeExternal(DataOutput out)
Save the contents of this object by storing the object's state into the passed DataOutput object.
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void |
writeExternal(PofWriter out)
Save the contents of a POF user type instance by writing its state using the specified PofWriter object.
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
accumulate, aggregate, isByMember, isByPartition, isParallel, isPresentOnly, isRetainsEntries, isSerial
public PartitionedCacheStatisticsAggregator()
public PartitionedCacheStatisticsAggregator(JCacheIdentifier id, ValueExtractor valueExtractor)
id
- the JCache cache to collect cache statistics for.valueExtractor
- extract CacheStatistics via binary entry context.public InvocableMap.StreamingAggregator supply()
InvocableMap.StreamingAggregator
supply
in interface InvocableMap.StreamingAggregator
public boolean accumulate(InvocableMap.Entry entry)
InvocableMap.StreamingAggregator
accumulate
in interface InvocableMap.StreamingAggregator
entry
- the entry to accumulate into the aggregation resultpublic boolean combine(Object partialResult)
InvocableMap.StreamingAggregator
combine
in interface InvocableMap.StreamingAggregator
partialResult
- the partial result to mergepublic Object getPartialResult()
InvocableMap.StreamingAggregator
getPartialResult
in interface InvocableMap.StreamingAggregator
public Object finalizeResult()
InvocableMap.StreamingAggregator
finalizeResult
in interface InvocableMap.StreamingAggregator
public int characteristics()
InvocableMap.StreamingAggregator
Be default, characteristics are a combination of InvocableMap.StreamingAggregator.PARALLEL
and InvocableMap.StreamingAggregator.RETAINS_ENTRIES
, which is sub-optimal and should be overridden by the aggregator implementation if the aggregator does not need to retain entries (which is often the case).
characteristics
in interface InvocableMap.StreamingAggregator
InvocableMap.StreamingAggregator.PARALLEL
, InvocableMap.StreamingAggregator.SERIAL
, InvocableMap.StreamingAggregator.BY_MEMBER
, InvocableMap.StreamingAggregator.BY_PARTITION
, InvocableMap.StreamingAggregator.RETAINS_ENTRIES
, InvocableMap.StreamingAggregator.PRESENT_ONLY
protected void process(Object o)
public void readExternal(DataInput in) throws IOException
ExternalizableLite
readExternal
in interface ExternalizableLite
in
- the DataInput stream to read data from in order to restore the state of this objectIOException
- if an I/O exception occursNotActiveException
- if the object is not in its initial state, and therefore cannot be deserialized intopublic void writeExternal(DataOutput out) throws IOException
ExternalizableLite
writeExternal
in interface ExternalizableLite
out
- the DataOutput stream to write the state of this object toIOException
- if an I/O exception occurspublic void readExternal(PofReader in) throws IOException
PortableObject
readExternal
in interface PortableObject
in
- the PofReader from which to read the object's stateIOException
- if an I/O error occurspublic void writeExternal(PofWriter out) throws IOException
PortableObject
writeExternal
in interface PortableObject
out
- the PofWriter to which to write the object's stateIOException
- if an I/O error occurs