@InterfaceAudience.Public @InterfaceStability.Unstable public final class WrappedStatistics extends Object
Serializable arguments/return values are actually
IOStatisticsSource instances; passing in the wrong value
will raise IllegalArgumentExceptions.| Modifier and Type | Method and Description |
|---|---|
static <T> T |
applyToIOStatisticsSnapshot(Serializable source,
org.apache.hadoop.util.functional.FunctionRaisingIOE<IOStatisticsSnapshot,T> fun)
Apply a function to an object which may be an IOStatisticsSnapshot.
|
static Map<String,Long> |
iostatistics_counters(Serializable source)
Get the counters of an IOStatisticsSnapshot.
|
static Map<String,Long> |
iostatistics_gauges(Serializable source)
Get the gauges of an IOStatisticsSnapshot.
|
static Map<String,Long> |
iostatistics_maximums(Serializable source)
Get the maximums of an IOStatisticsSnapshot.
|
static Map<String,Map.Entry<Long,Long>> |
iostatistics_means(Serializable source)
Get the means of an IOStatisticsSnapshot.
|
static Map<String,Long> |
iostatistics_minimums(Serializable source)
Get the minimums of an IOStatisticsSnapshot.
|
static String |
iostatistics_toPrettyString(Object statistics)
Convert IOStatistics to a string form, with all the metrics sorted
and empty value stripped.
|
static boolean |
iostatisticsContext_aggregate(Object source)
Aggregate into the IOStatistics context the statistics passed in via
IOStatistics/source parameter.
|
static boolean |
iostatisticsContext_enabled()
Static probe to check if the thread-level IO statistics enabled.
|
static Object |
iostatisticsContext_getCurrent()
Get the context's
IOStatisticsContext which
implements IOStatisticsSource. |
static void |
iostatisticsContext_reset()
Reset the context's IOStatistics.
|
static void |
iostatisticsContext_setThreadIOStatisticsContext(Object statisticsContext)
Set the IOStatisticsContext for the current thread.
|
static Serializable |
iostatisticsContext_snapshot()
Take a snapshot of the context IOStatistics.
|
static boolean |
iostatisticsSnapshot_aggregate(Serializable snapshot,
Object statistics)
Aggregate an existing
IOStatisticsSnapshot with
the supplied statistics. |
static Serializable |
iostatisticsSnapshot_create()
Create a new
IOStatisticsSnapshot instance. |
static Serializable |
iostatisticsSnapshot_create(Object source)
Create a new
IOStatisticsSnapshot instance. |
static Serializable |
iostatisticsSnapshot_fromJsonString(String json)
Load IOStatisticsSnapshot from a JSON string.
|
static Serializable |
iostatisticsSnapshot_load(FileSystem fs,
Path path)
Load IOStatisticsSnapshot from a Hadoop filesystem.
|
static Serializable |
iostatisticsSnapshot_retrieve(Object source)
Extract the IOStatistics from an object in a serializable form.
|
static void |
iostatisticsSnapshot_save(Serializable snapshot,
FileSystem fs,
Path path,
boolean overwrite)
Save IOStatisticsSnapshot to a Hadoop filesystem as a JSON file.
|
static String |
iostatisticsSnapshot_toJsonString(Serializable snapshot)
Save IOStatisticsSnapshot to a JSON string.
|
static boolean |
isIOStatistics(Object object)
Probe for an object being an instance of
IOStatistics. |
static boolean |
isIOStatisticsSnapshot(Serializable object)
Probe for an object being an instance of
IOStatisticsSnapshot. |
static boolean |
isIOStatisticsSource(Object object)
Probe for an object being an instance of
IOStatisticsSource. |
public static boolean isIOStatisticsSource(Object object)
IOStatisticsSource.object - object to probepublic static boolean isIOStatistics(Object object)
IOStatistics.object - object to probepublic static boolean isIOStatisticsSnapshot(Serializable object)
IOStatisticsSnapshot.object - object to probepublic static boolean iostatisticsSnapshot_aggregate(Serializable snapshot, @Nullable Object statistics)
IOStatisticsSnapshot with
the supplied statistics.snapshot - snapshot to updatestatistics - IOStatistics to addIllegalArgumentException - if the statistics argument is not
null but not an instance of IOStatistics, or if snapshot is invalid.public static Serializable iostatisticsSnapshot_create()
IOStatisticsSnapshot instance.public static Serializable iostatisticsSnapshot_create(@Nullable Object source)
IOStatisticsSnapshot instance.source - optional source statisticsClassCastException - if the source is not null and not an IOStatistics instancepublic static Serializable iostatisticsSnapshot_load(FileSystem fs, Path path)
fs - filesystempath - pathUncheckedIOException - Any IO exception.public static Serializable iostatisticsSnapshot_retrieve(@Nullable Object source)
source - source object, may be null/not a statistics source/instanceIOStatisticsSnapshot or null if the object is null/doesn't have statisticspublic static void iostatisticsSnapshot_save(@Nullable Serializable snapshot, FileSystem fs, Path path, boolean overwrite)
snapshot - statisticsfs - filesystempath - pathoverwrite - should any existing file be overwritten?UncheckedIOException - Any IO exception.public static String iostatisticsSnapshot_toJsonString(@Nullable Serializable snapshot)
snapshot - statistics; may be null or of an incompatible typeUncheckedIOException - Any IO/jackson exception.IllegalArgumentException - if the supplied class is not a snapshotpublic static Serializable iostatisticsSnapshot_fromJsonString(String json)
json - JSON string value.UncheckedIOException - Any IO/jackson exception.public static Map<String,Long> iostatistics_counters(Serializable source)
source - source of statistics.public static Map<String,Long> iostatistics_gauges(Serializable source)
source - source of statistics.public static Map<String,Long> iostatistics_minimums(Serializable source)
source - source of statistics.public static Map<String,Long> iostatistics_maximums(Serializable source)
source - source of statistics.public static Map<String,Map.Entry<Long,Long>> iostatistics_means(Serializable source)
source - source of statistics.public static Object iostatisticsContext_getCurrent()
IOStatisticsContext which
implements IOStatisticsSource.
This is either a thread-local value or a global empty context.IOStatisticsContext.public static void iostatisticsContext_setThreadIOStatisticsContext(@Nullable Object statisticsContext)
statisticsContext - IOStatistics context instance for the
current thread. If null, the context is reset.public static boolean iostatisticsContext_enabled()
public static void iostatisticsContext_reset()
IOStatisticsContext.reset()public static Serializable iostatisticsContext_snapshot()
IOStatisticsContext.snapshot()IOStatisticsSnapshot.public static boolean iostatisticsContext_aggregate(Object source)
Returns false if the source is null or does not contain any statistics.
source - implementation of IOStatisticsSource or IOStatisticspublic static String iostatistics_toPrettyString(@Nullable Object statistics)
statistics - A statistics instance; may be nullpublic static <T> T applyToIOStatisticsSnapshot(Serializable source, org.apache.hadoop.util.functional.FunctionRaisingIOE<IOStatisticsSnapshot,T> fun)
T - return typesource - statistics snapshotfun - function to invoke if source is valid.UncheckedIOException - Any IO exception.IllegalArgumentException - if the supplied class is not a snapshotCopyright © 2024 Apache Software Foundation. All rights reserved.