net.openhft.chronicle.queue.impl.table

Class ReadonlyTableStore<T extends Metadata>

java.lang.Object

net.openhft.chronicle.queue.impl.table.ReadonlyTableStore<T>

All Implemented Interfaces:

Closeable, AutoCloseable, net.openhft.chronicle.bytes.CommonMarshallable, net.openhft.chronicle.core.ReferenceCounted, CommonStore, TableStore<T>, net.openhft.chronicle.wire.Demarshallable, net.openhft.chronicle.wire.WriteMarshallable, net.openhft.chronicle.wire.WriteValue

public class ReadonlyTableStore<T extends Metadata>
extends Object
implements TableStore<T>

Field Summary

Fields inherited from interface net.openhft.chronicle.wire.Demarshallable

DEMARSHALLABLES

Fields inherited from interface net.openhft.chronicle.wire.WriteMarshallable

EMPTY

Constructor Summary

Constructors

Constructor and Description
ReadonlyTableStore(T metadata)

Method Summary

Modifier and Type	Method and Description
net.openhft.chronicle.core.values.LongValue	acquireValueFor(CharSequence key, long defaultValue)
@NotNull net.openhft.chronicle.bytes.MappedBytes	bytes()
void	close()
<R> R	doWithExclusiveLock(Function<TableStore<T>,? extends R> code) Acquires file-system level lock on the underlying file, to prevent concurrent access from multiple processes.
@NotNull String	dump()
@Nullable File	file()
T	metadata()
boolean	readOnly()
long	refCount()
void	release()
void	reserve()
@NotNull String	shortDump()
boolean	tryReserve()
void	writeMarshallable(@NotNull net.openhft.chronicle.wire.WireOut wire)

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.queue.impl.TableStore

acquireValueFor

Methods inherited from interface net.openhft.chronicle.core.ReferenceCounted

release, releaseAll

Methods inherited from interface net.openhft.chronicle.wire.Demarshallable

newInstance

Methods inherited from interface net.openhft.chronicle.wire.WriteMarshallable

usesSelfDescribingMessage, writeValue

Methods inherited from interface net.openhft.chronicle.core.io.Closeable

closeQuietly, closeQuietly, isClosed, notifyClosing

Constructor Detail

ReadonlyTableStore

public ReadonlyTableStore(T metadata)

Method Detail

metadata

public T metadata()

Specified by:

metadata in interface TableStore<T extends Metadata>

close

public void close()

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

acquireValueFor

public net.openhft.chronicle.core.values.LongValue acquireValueFor(CharSequence key,
                                                                   long defaultValue)

Specified by:

acquireValueFor in interface TableStore<T extends Metadata>

doWithExclusiveLock

public <R> R doWithExclusiveLock(Function<TableStore<T>,? extends R> code)

Description copied from interface: TableStore

Acquires file-system level lock on the underlying file, to prevent concurrent access from multiple processes. It is recommended to use this when acquiring your values for the first time, otherwise it is possible to get unpredictable results in case of multiple processes/threads trying to acquire values for the same key. In addition, it allows to batch multiple TableStore.acquireValueFor(CharSequence) calls, to atomically acquire multiple values.

Specified by:

doWithExclusiveLock in interface TableStore<T extends Metadata>

Type Parameters:

R - result type

Parameters:

code - code block to execute using locked table store

Returns:

result of code block execution

file

@Nullable
public @Nullable File file()

Specified by:

file in interface CommonStore

Returns:

the file associated with this store.

bytes

@NotNull
public @NotNull net.openhft.chronicle.bytes.MappedBytes bytes()

Specified by:

bytes in interface CommonStore

dump

@NotNull
public @NotNull String dump()

Specified by:

dump in interface CommonStore

shortDump

@NotNull
public @NotNull String shortDump()

Specified by:

shortDump in interface CommonStore

reserve

public void reserve()
             throws IllegalStateException

Specified by:

reserve in interface net.openhft.chronicle.core.ReferenceCounted

Throws:

IllegalStateException

release

public void release()
             throws IllegalStateException

Specified by:

release in interface net.openhft.chronicle.core.ReferenceCounted

Throws:

IllegalStateException

refCount

public long refCount()

Specified by:

refCount in interface net.openhft.chronicle.core.ReferenceCounted

tryReserve

public boolean tryReserve()

Specified by:

tryReserve in interface net.openhft.chronicle.core.ReferenceCounted

writeMarshallable

public void writeMarshallable(@NotNull
                              @NotNull net.openhft.chronicle.wire.WireOut wire)

Specified by:

writeMarshallable in interface net.openhft.chronicle.wire.WriteMarshallable

readOnly

public boolean readOnly()

Specified by:

readOnly in interface TableStore<T extends Metadata>