net.openhft.chronicle.map.impl.stage.query

Class MapQuery<K,V,R>

java.lang.Object

net.openhft.chronicle.hash.impl.stage.query.HashQuery<K>

net.openhft.chronicle.map.impl.stage.query.MapQuery<K,V,R>

All Implemented Interfaces:

AutoCloseable, ReadWriteLock, ExternalHashQueryContext<K>, HashContext<K>, HashEntry<K>, HashQueryContext<K>, InterProcessReadWriteUpdateLock, SegmentLock, DefaultValueProvider<K,V>, ExternalMapQueryContext<K,V,R>, net.openhft.chronicle.map.impl.QueryContextInterface<K,V,R>, MapAndSetContext<K,V,R>, MapContext<K,V,R>, MapEntry<K,V>, MapEntryOperations<K,V,R>, MapQueryContext<K,V,R>, ExternalSetQueryContext<K,R>, SetContext<K,R>, SetEntry<K>, SetEntryOperations<K,R>, SetQueryContext<K,R>

Direct Known Subclasses:

ReplicatedMapQuery

public abstract class MapQuery<K,V,R>
extends HashQuery<K>
implements MapEntry<K,V>, ExternalMapQueryContext<K,V,R>, ExternalSetQueryContext<K,R>, net.openhft.chronicle.map.impl.QueryContextInterface<K,V,R>, MapAndSetContext<K,V,R>

Nested Class Summary

Nested classes/interfaces inherited from class net.openhft.chronicle.hash.impl.stage.query.HashQuery

HashQuery.EntryPresence

Field Summary

Fields

Modifier and Type	Field and Description
MapAbsent<K,V>	absent
AcquireHandle<K,V>	acquireHandle
DefaultReturnValue<V>	defaultReturnValue
UsingReturnValue<V>	usingReturnValue

Fields inherited from class net.openhft.chronicle.hash.impl.stage.query.HashQuery

checkOnEachPublicOperation, entry, hashLookupSearch, hh, hlp, s

Constructor Summary

Constructors

Constructor and Description
MapQuery()

Method Summary

Modifier and Type	Method and Description
Absent<K,V>	absentEntry() Returns the special absent entry object, if the entry with the queried key is absent in the hash, returns null, if the entry is present.
MapQuery<K,V,R>	context() Returns the context, in which the entry is accessed.
void	doReplaceValue(Data<V> newValue) Replaces the entry's value with the given newValue.
MapQuery<K,V,R>	entry() Returns the entry context, if the entry with the queried key is present in the ChronicleHash, returns null is the entry is absent.
Data<K>	getInputKeyBytesAsData(net.openhft.chronicle.bytes.BytesStore<?,?> bytesStore, long offset, long size)
DataAccess<V>	inputValueDataAccess()
protected void	putPrefix()

Methods inherited from class net.openhft.chronicle.hash.impl.stage.query.HashQuery

doRemove, dropSearchIfNestedContextsAndPresentHashLookupSlotCheckFailed, entryPresent, initPresenceOfEntry, inputKeyDataAccess, queriedKey

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface net.openhft.chronicle.map.MapEntry

doRemove, value

Methods inherited from interface net.openhft.chronicle.hash.HashEntry

key

Methods inherited from interface net.openhft.chronicle.map.impl.QueryContextInterface

acquireHandle, defaultReturnValue, initInputKey, initSegmentIndex, inputKeyDataAccess, segmentIndexInit, usingReturnValue

Methods inherited from interface net.openhft.chronicle.map.MapContext

map, wrapValueAsData, wrapValueBytesAsData

Methods inherited from interface net.openhft.chronicle.map.MapEntryOperations

insert, remove, replaceValue

Methods inherited from interface net.openhft.chronicle.map.DefaultValueProvider

defaultValue

Methods inherited from interface net.openhft.chronicle.hash.ExternalHashQueryContext

close

Methods inherited from interface net.openhft.chronicle.hash.HashQueryContext

queriedKey, segmentIndex

Methods inherited from interface net.openhft.chronicle.hash.locks.InterProcessReadWriteUpdateLock

readLock, updateLock, writeLock

Field Detail

acquireHandle

public AcquireHandle<K,V> acquireHandle

defaultReturnValue

public DefaultReturnValue<V> defaultReturnValue

usingReturnValue

public UsingReturnValue<V> usingReturnValue

absent

public MapAbsent<K,V> absent

Constructor Detail

MapQuery

public MapQuery()

Method Detail

inputValueDataAccess

public DataAccess<V> inputValueDataAccess()

Specified by:

inputValueDataAccess in interface net.openhft.chronicle.map.impl.QueryContextInterface<K,V,R>

entry

public MapQuery<K,V,R> entry()

Description copied from interface: HashQueryContext

Returns the entry context, if the entry with the queried key is present in the ChronicleHash, returns null is the entry is absent. Might acquire InterProcessReadWriteUpdateLock.readLock() before searching for the key, if the context is not locked yet.

Specified by:

entry in interface HashQueryContext<K>

Specified by:

entry in interface MapQueryContext<K,V,R>

Specified by:

entry in interface SetQueryContext<K,R>

absentEntry

@Nullable
public Absent<K,V> absentEntry()

Description copied from interface: HashQueryContext

Returns the special absent entry object, if the entry with the queried key is absent in the hash, returns null, if the entry is present. Might acquire InterProcessReadWriteUpdateLock.readLock() before searching for the key, if the context is not locked yet.

Specified by:

absentEntry in interface HashQueryContext<K>

Specified by:

absentEntry in interface MapQueryContext<K,V,R>

Specified by:

absentEntry in interface SetQueryContext<K,R>

putPrefix

protected void putPrefix()

doReplaceValue

public void doReplaceValue(Data<V> newValue)

Description copied from interface: MapEntry

Replaces the entry's value with the given newValue.

This method is the default implementation for MapEntryOperations.replaceValue( MapEntry, Data), which might be customized over the default.

Specified by:

doReplaceValue in interface MapEntry<K,V>

Parameters:

newValue - the value to be put into the map instead of the current value

context

@NotNull
public MapQuery<K,V,R> context()

Description copied from interface: HashEntry

Returns the context, in which the entry is accessed.

Specified by:

context in interface HashEntry<K>

Specified by:

context in interface MapEntry<K,V>

Specified by:

context in interface SetEntry<K>

getInputKeyBytesAsData

public Data<K> getInputKeyBytesAsData(net.openhft.chronicle.bytes.BytesStore<?,?> bytesStore,
                                      long offset,
                                      long size)

Specified by:

getInputKeyBytesAsData in interface net.openhft.chronicle.map.impl.QueryContextInterface<K,V,R>