net.openhft.chronicle.queue.impl.table

Class SingleTableStore<T extends Metadata>

java.lang.Object

net.openhft.chronicle.core.io.AbstractCloseable

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

All Implemented Interfaces:

Closeable, AutoCloseable, net.openhft.chronicle.bytes.CommonMarshallable, net.openhft.chronicle.core.io.CloseableTracer, net.openhft.chronicle.core.io.QueryCloseable, net.openhft.chronicle.core.io.ReferenceOwner, CommonStore, TableStore<T>, net.openhft.chronicle.wire.Demarshallable, net.openhft.chronicle.wire.WriteMarshallable, net.openhft.chronicle.wire.WriteValue

public class SingleTableStore<T extends Metadata>
extends net.openhft.chronicle.core.io.AbstractCloseable
implements TableStore<T>

Field Summary

Fields

Modifier and Type	Field and Description
static String	SUFFIX

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

DEMARSHALLABLES

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

EMPTY

Fields inherited from interface net.openhft.chronicle.core.io.ReferenceOwner

INIT

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()
static <T,R> R	doWithExclusiveLock(File file, Function<T,? extends R> code, Supplier<T> target)
<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.
static <T,R> R	doWithSharedLock(File file, Function<T,? extends R> code, Supplier<T> target)
@NotNull String	dump()
@NotNull File	file()
T	metadata()
protected void	performClose()
@NotNull String	shortDump()
protected boolean	threadSafetyCheck(boolean isUsed)
@NotNull String	toString()
void	writeMarshallable(@NotNull net.openhft.chronicle.wire.WireOut wire)

Methods inherited from class net.openhft.chronicle.core.io.AbstractCloseable

assertCloseablesClosed, clearUsedByThread, close, createdHere, disableCloseableTracing, enableCloseableTracing, isClosed, performCloseInBackground, referenceId, resetUsedByThread, throwExceptionIfClosed, throwExceptionIfClosedInSetter, unmonitor, warnAndCloseIfNotClosed

Methods inherited from class java.lang.Object

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

Methods inherited from interface net.openhft.chronicle.queue.impl.TableStore

acquireValueFor, readOnly

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

close, closeQuietly, closeQuietly, notifyClosing

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

isClosed, throwExceptionIfClosed

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

referenceName, temporary

Field Detail

SUFFIX

public static final String SUFFIX

See Also:

Constant Field Values

Method Detail

doWithSharedLock

public static <T,R> R doWithSharedLock(File file,
                                       Function<T,? extends R> code,
                                       Supplier<T> target)

doWithExclusiveLock

public static <T,R> R doWithExclusiveLock(File file,
                                          Function<T,? extends R> code,
                                          Supplier<T> target)

file

@NotNull
public @NotNull File file()

Specified by:

file in interface CommonStore

Returns:

the file associated with this store.

dump

@NotNull
public @NotNull String dump()

Specified by:

dump in interface CommonStore

shortDump

@NotNull
public @NotNull String shortDump()

Specified by:

shortDump in interface CommonStore

performClose

protected void performClose()

Specified by:

performClose in class net.openhft.chronicle.core.io.AbstractCloseable

bytes

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

Specified by:

bytes in interface CommonStore

Returns:

creates a new instance of mapped bytes, because, for example the tailer and appender can be at different locations.

toString

@NotNull
public @NotNull String toString()

Overrides:

toString in class net.openhft.chronicle.core.io.AbstractCloseable

writeMarshallable

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

Specified by:

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

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)

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

metadata

public T metadata()

Specified by:

metadata in interface TableStore<T extends Metadata>

threadSafetyCheck

protected boolean threadSafetyCheck(boolean isUsed)

Overrides:

threadSafetyCheck in class net.openhft.chronicle.core.io.AbstractCloseable