java.lang.Object
- com.tangosol.util.Base
- - com.tangosol.util.BitHelper
  - - com.tangosol.util.ExternalizableHelper
    - - com.tangosol.util.transformer.SamplingEventTransformer<K,V>

All Implemented Interfaces:

ExternalizableLite, PortableObject, MapEventTransformer<K,V,V>, Serializable
```
public class SamplingEventTransformer<K,V>
extends ExternalizableHelper
implements MapEventTransformer<K,V,V>, ExternalizableLite, PortableObject
```
A MapEventTransformer implementation which will send at most one event per storage member per sampling interval, in order to throttle down the number of events received by the slow consumer.

Since:

12.2.1

Author:

as 2015.02.21

See Also:

Serialized Form

Nested Class Summary
- Nested classes/interfaces inherited from class com.tangosol.util.ExternalizableHelper
  ExternalizableHelper.DecoratedMultiBufferReadBuffer, ExternalizableHelper.DefaultObjectStreamFactory, ExternalizableHelper.FormatAwareCompressor, ExternalizableHelper.IntDecoratedObject, ExternalizableHelper.Shielded, ExternalizableHelper.ShieldedDataOutputStream, ExternalizableHelper.ShieldedInputStream, ExternalizableHelper.ShieldedObjectOutputStream, ExternalizableHelper.ShieldedOutputStream, ExternalizableHelper.SimpleXmlBeanClassCache, ExternalizableHelper.Stats, ExternalizableHelper.XmlBeanClassCache
- Nested classes/interfaces inherited from class com.tangosol.util.Base
  Base.LoggingWriter

Field Summary

Fields
Modifier and Type Field Description

protected long m_nLastSentTime
The last time an event was sent.

protected int m_nSamplingInterval
The sampling interval to use.
- Fields inherited from class com.tangosol.util.ExternalizableHelper
  BINARY_SIZE, CHUNK_SIZE, CHUNK_THRESHOLD, CONVERTER_FROM_BINARY, CONVERTER_STRIP_INTDECO, CONVERTER_TO_BINARY, DECO_APP_1, DECO_APP_2, DECO_APP_3, DECO_BACKUP, DECO_CUSTOM, DECO_EXPIRY, DECO_ID_MAX, DECO_ID_MIN, DECO_JCACHE, DECO_JCACHE_SYNTHETIC, DECO_MEMCACHED, DECO_PUSHREP, DECO_QUEUE_METADATA, DECO_RSVD_1, DECO_STORE, DECO_TX, DECO_VALUE, DECO_WLS, EMPTY_BINARY_ARRAY, FMT_B_ARRAY, FMT_BIN_DECO, FMT_BIN_EXT_DECO, FMT_BINARY, FMT_BOOLEAN, FMT_BYTE, FMT_DECIMAL, FMT_DOUBLE, FMT_EXT, FMT_FLOAT, FMT_IDO, FMT_INT, FMT_INTEGER, FMT_LONG, FMT_NONE, FMT_NULL, FMT_OBJ_EXT, FMT_OBJ_SER, FMT_OPT, FMT_OPT_DOUBLE, FMT_OPT_INT, FMT_OPT_LONG, FMT_SHORT, FMT_STRING, FMT_UNKNOWN, FMT_XML_BEAN, FMT_XML_SER, FORCE_RESOLVING_STREAMS, LAMBDA_SERIALIZATION, MAX_DECO_HEADER_BYTES, PACKED_INT_SIZE, PACKED_LONG_SIZE, PROPERTY_CONFIG, s_streamfactory, TRINT_DOMAIN_SPAN, TRINT_MAX_VALUE, TRINT_MAX_VARIANCE, USE_POF_STREAMS, USE_XMLBEAN_CLASS_CACHE, XMLBEAN_CLASS_CACHE
- Fields inherited from class com.tangosol.util.Base
  LOG_ALWAYS, LOG_CONFIG, LOG_DEBUG, LOG_ERR, LOG_INFO, LOG_MAX, LOG_MIN, LOG_QUIET, LOG_WARN, POWER_0, POWER_G, POWER_K, POWER_M, POWER_T, UNIT_D, UNIT_H, UNIT_M, UNIT_MS, UNIT_NS, UNIT_S, UNIT_US

Constructor Summary

Constructors
Constructor	Description
`SamplingEventTransformer()`	Deserialization constructor.
`SamplingEventTransformer(int nSamplingInterval)`	Construct SamplingEventTransformer instance.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`readExternal(PofReader in)`	Restore the contents of a user type instance by reading its state using the specified PofReader object.
`void`	`readExternal(DataInput in)`	Restore the contents of this object by loading the object's state from the passed DataInput object.
`MapEvent<K,V>`	`transform(MapEvent<K,V> event)`	Transform the specified MapEvent.
`void`	`writeExternal(PofWriter out)`	Save the contents of a POF user type instance by writing its state using the specified PofWriter object.
`void`	`writeExternal(DataOutput out)`	Save the contents of this object by storing the object's state into the passed DataOutput object.

Methods inherited from class com.tangosol.util.ExternalizableHelper
asBinary, calculatePackedLength, calculatePackedLength, checkObjectInputFilter, checkObjectInputFilter, checkObjectInputFilter, convertUTF, decodeExpiry, decorate, decorate, decorate, decorate, decorate, decorateBinary, encodeExpiry, ensureSerializer, extractIntDecoration, fromBinary, fromBinary, fromBinary, fromBinary, fromBinary, fromBinary, fromByteArray, fromByteArray, getClass, getConfigSerialFilter, getConfigSerialFilterFactory, getDecoration, getDecoration, getDecorations, getDeltaCompressor, getInputStream, getNewObjectInput, getObjectInput, getObjectInputFilter, getObjectOutput, getObjectStreamFactory, getOutputStream, getShieldedOutputStream, getStreamFormat, getUndecorated, getUndecorated, isDecorated, isDecorated, isIntDecorated, isIntDecorated, isPatchCompatible, isPatchCompatible, isResolving, isSerializable, isSerializerCompatible, isVersionCompatible, isVersionCompatible, isVersionCompatible, isVersionCompatible, isVersionCompatible, isVersionCompatible, loadClass, loadResource, main, makeTrint, readBigDecimal, readBigInteger, readBooleanArray, readBooleanArray, readByteArray, readCharArray, readCharArray, readCollection, readDate, readDoubleArray, readDoubleArray, readExternalizableLite, readExternalizableLite, readFloatArray, readFloatArray, readInt, readInt, readIntArray, readIntArray, readIntArray2d, readLargeBooleanArray, readLargeByteArray, readLargeCharArray, readLargeDoubleArray, readLargeFloatArray, readLargeIntArray, readLargeLongArray, readLargeObjectArray, readLargeStringArray, readLong, readLong, readLongArray, readLongArray, readMap, readMap, readObject, readObject, readObjectArray, readObjectArray, readSafeUTF, readSafeUTF, readSerializable, readSerializable, readStringArray, readStringArray, readTime, readTimestamp, readTrint, readUnsignedTrint, readUTF, readXmlBean, readXmlSerializable, readXmlSerializable, realize, removeIntDecoration, removeIntDecoration, replace, reportIncompatibleSerializers, setObjectStreamFactory, toBinary, toBinary, toBinary, toByteArray, toByteArray, toByteArray, toLiteBinary, toLong, undecorate, undecorate, validateBufferSize, validateLoadArray, validateLoadClass, writeBigDecimal, writeBigInteger, writeBooleanArray, writeByteArray, writeCollection, writeDate, writeDoubleArray, writeExternalizableLite, writeFloatArray, writeInt, writeInt, writeIntArray2d, writeLong, writeLong, writeMap, writeObject, writeSafeUTF, writeSafeUTF, writeSerializable, writeStringArray, writeTime, writeTimestamp, writeTrint, writeTrint, writeUTF, writeXmlBean, writeXmlSerializable

Methods inherited from class com.tangosol.util.BitHelper
countBits, countBits, countBits, indexOfLSB, indexOfLSB, indexOfLSB, indexOfMSB, indexOfMSB, indexOfMSB, rotateLeft, rotateLeft, rotateLeft, rotateRight, rotateRight, rotateRight, toBitString, toBitString, toBitString, toBytes, toBytes, toBytes, toBytes, toInt, toInt, toLong

Methods inherited from class com.tangosol.util.Base
azzert, azzert, azzert, azzertFailed, breakLines, breakLines, capitalize, checkNotEmpty, checkNotNull, checkRange, computeSafeWaitTime, decimalValue, dup, dup, ensureBigDecimal, ensureClassLoader, ensureRuntimeException, ensureRuntimeException, equals, equalsDeep, err, err, err, err, err, escape, formatDateTime, getCallerStackFrame, getCommonMonitor, getCommonMonitor, getCommonMonitor, getContextClassLoader, getContextClassLoader, getDeepMessage, getErr, getLastSafeTimeMillis, getLog, getMaxDecDigits, getMaxHexDigits, getOriginalException, getOut, getProcessRandom, getRandom, getRandomBinary, getRandomBinary, getRandomString, getSafeTimeMillis, getStackFrame, getStackFrames, getStackTrace, getStackTrace, getStackTrace, getThreadFactory, getTimeZone, getUpTimeMillis, hashCode, hexValue, indentString, indentString, isDecimal, isHex, isLogEcho, isOctal, log, log, log, log, log, makeInteger, makeLong, makeThread, mergeArray, mergeBooleanArray, mergeByteArray, mergeCharArray, mergeDoubleArray, mergeFloatArray, mergeIntArray, mergeLongArray, mod, mod, octalValue, out, out, out, out, out, pad, parseBandwidth, parseBandwidth, parseDelimitedString, parseHex, parseHex, parseMemorySize, parseMemorySize, parsePercentage, parseTime, parseTime, parseTimeNanos, parseTimeNanos, printStackTrace, randomize, randomize, randomize, randomize, read, read, read, read, read, read, read, replace, setErr, setLog, setLogEcho, setOut, sleep, toBandwidthString, toBandwidthString, toCharEscape, toCrc, toCrc, toCrc, toCrc, toCrc, toDecString, toDelimitedString, toDelimitedString, toDelimitedString, toDelimitedString, toHex, toHex, toHexDump, toHexEscape, toHexEscape, toHexEscape, toHexEscape, toHexString, toMemorySizeString, toMemorySizeString, toQuotedCharEscape, toQuotedStringEscape, toSqlString, toString, toString, toStringEscape, toUnicodeEscape, trace, trace, trace, trace, trace, trace, trace, trace, trace, truncateString, truncateString, wait

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.tangosol.util.MapEventTransformer
andThen

- Field Detail
  - m_nSamplingInterval
```
protected int m_nSamplingInterval
```
    The sampling interval to use.
  - m_nLastSentTime
```
protected transient long m_nLastSentTime
```
    The last time an event was sent.
- Constructor Detail
  - SamplingEventTransformer
```
public SamplingEventTransformer()
```
    Deserialization constructor.
  - SamplingEventTransformer
```
public SamplingEventTransformer(int nSamplingInterval)
```
    Construct SamplingEventTransformer instance.
    
    Parameters:
    
    nSamplingInterval - the sampling interval to use
- Method Detail
  - transform
```
public MapEvent<K,V> transform(MapEvent<K,V> event)
```
    Description copied from interface: MapEventTransformer
    
    Transform the specified MapEvent. The values contained by the returned MapEvent object will be the ones given (sent) to the corresponding listener.
    
    Specified by:
    
    transform in interface MapEventTransformer<K,V,V>
    
    Parameters:
    
    event - the original MapEvent object
    
    Returns:
    
    modified MapEvent object or null to discard the event
  - readExternal
```
public void readExternal(DataInput in)
                  throws IOException
```
    Description copied from interface: ExternalizableLite
    
    Restore the contents of this object by loading the object's state from the passed DataInput object.
    
    Specified by:
    
    readExternal in interface ExternalizableLite
    
    Parameters:
    
    in - the DataInput stream to read data from in order to restore the state of this object
    
    Throws:
    
    IOException - if an I/O exception occurs
    
    NotActiveException - if the object is not in its initial state, and therefore cannot be deserialized into
  - writeExternal
```
public void writeExternal(DataOutput out)
                   throws IOException
```
    Description copied from interface: ExternalizableLite
    
    Save the contents of this object by storing the object's state into the passed DataOutput object.
    
    Specified by:
    
    writeExternal in interface ExternalizableLite
    
    Parameters:
    
    out - the DataOutput stream to write the state of this object to
    
    Throws:
    
    IOException - if an I/O exception occurs
  - readExternal
```
public void readExternal(PofReader in)
                  throws IOException
```
    Description copied from interface: PortableObject
    
    Restore the contents of a user type instance by reading its state using the specified PofReader object.
    
    Specified by:
    
    readExternal in interface PortableObject
    
    Parameters:
    
    in - the PofReader from which to read the object's state
    
    Throws:
    
    IOException - if an I/O error occurs
  - writeExternal
```
public void writeExternal(PofWriter out)
                   throws IOException
```
    Description copied from interface: PortableObject
    
    Save the contents of a POF user type instance by writing its state using the specified PofWriter object.
    
    Specified by:
    
    writeExternal in interface PortableObject
    
    Parameters:
    
    out - the PofWriter to which to write the object's state
    
    Throws:
    
    IOException - if an I/O error occurs

Modifier and Type	Field	Description
`protected long`	`m_nLastSentTime`	The last time an event was sent.
`protected int`	`m_nSamplingInterval`	The sampling interval to use.

Class SamplingEventTransformer<K,​V>

Nested Class Summary

Nested classes/interfaces inherited from class com.tangosol.util.ExternalizableHelper

Nested classes/interfaces inherited from class com.tangosol.util.Base

Field Summary

Fields inherited from class com.tangosol.util.ExternalizableHelper

Fields inherited from class com.tangosol.util.Base

Constructor Summary

Method Summary

Methods inherited from class com.tangosol.util.ExternalizableHelper

Methods inherited from class com.tangosol.util.BitHelper

Methods inherited from class com.tangosol.util.Base

Methods inherited from class java.lang.Object

Methods inherited from interface com.tangosol.util.MapEventTransformer

Field Detail

m_nSamplingInterval

m_nLastSentTime

Constructor Detail

SamplingEventTransformer

SamplingEventTransformer

Method Detail

transform

readExternal

writeExternal

readExternal

writeExternal

Class SamplingEventTransformer<K,V>