org.apache.bookkeeper.mledger.impl

Class ReadOnlyCursorImpl

java.lang.Object

org.apache.bookkeeper.mledger.impl.ManagedCursorImpl

org.apache.bookkeeper.mledger.impl.ReadOnlyCursorImpl

All Implemented Interfaces:

ManagedCursor, ReadOnlyCursor

public class ReadOnlyCursorImpl
extends ManagedCursorImpl
implements ReadOnlyCursor

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.bookkeeper.mledger.impl.ManagedCursorImpl

ManagedCursorImpl.VoidCallback

Nested classes/interfaces inherited from interface org.apache.bookkeeper.mledger.ManagedCursor

ManagedCursor.FindPositionConstraint, ManagedCursor.IndividualDeletedEntries

Field Summary

Fields inherited from class org.apache.bookkeeper.mledger.impl.ManagedCursorImpl

bookkeeper, config, FALSE, LAST_MARK_DELETE_ENTRY_UPDATER, lastMarkDeleteEntry, ledger, markDeletePosition, mbean, messagesConsumedCounter, pendingMarkDeleteOps, persistentMarkDeletePosition, READ_POSITION_UPDATER, readPosition, state, statsLastReadPosition, TRUE, WAITING_READ_OP_UPDATER

Constructor Summary

Constructors

Constructor and Description
ReadOnlyCursorImpl(BookKeeper bookkeeper, ManagedLedgerConfig config, ManagedLedgerImpl ledger, PositionImpl startPosition, String cursorName)

Method Summary

Modifier and Type	Method and Description
void	asyncClose(AsyncCallbacks.CloseCallback callback, Object ctx) Close the cursor asynchronously and release the associated resources.
MLDataFormats.ManagedLedgerInfo.LedgerInfo	getCurrentLedgerInfo()
long	getNumberOfEntries(com.google.common.collect.Range<PositionImpl> range) Return the number of messages that this cursor still has to read.
void	skipEntries(int numEntriesToSkip) Skip n entries from the read position of this cursor.

Methods inherited from class org.apache.bookkeeper.mledger.impl.ManagedCursorImpl

asyncClearBacklog, asyncDelete, asyncDelete, asyncFindNewestMatching, asyncGetNthEntry, asyncMarkDelete, asyncMarkDelete, asyncReadEntries, asyncReadEntries, asyncReadEntriesOrWait, asyncReadEntriesOrWait, asyncReplayEntries, asyncReplayEntries, asyncResetCursor, asyncSkipEntries, cancelPendingReadRequest, checkAndUpdateReadPositionChanged, clearBacklog, close, delete, delete, findNewestMatching, findNewestMatching, getBatchPositionAckSet, getCursorLedger, getCursorLedgerLastEntry, getDeletedBatchIndexesAsLongArray, getEstimatedSizeSinceMarkDeletePosition, getFirstPosition, getIndividuallyDeletedMessages, getIndividuallyDeletedMessagesSet, getLastActive, getLastIndividualDeletedRange, getLastLedgerSwitchTimestamp, getManagedLedger, getMarkDeletedPosition, getMessagesConsumedCounter, getName, getNextAvailablePosition, getNextLedgerPosition, getNonContiguousDeletedMessagesRangeSerializedSize, getNthEntry, getNumberOfEntries, getNumberOfEntriesInBacklog, getNumberOfEntriesInStorage, getNumberOfEntriesSinceFirstNotAckedMessage, getPendingReadOpsCount, getPersistentMarkDeletedPosition, getProperties, getReadPosition, getState, getStats, getThrottleMarkDelete, getTotalNonContiguousDeletedMessagesRange, hasMoreEntries, hasPendingReadRequest, internalAsyncMarkDelete, internalResetCursor, isActive, isBkErrorNotRecoverable, isClosed, isDurable, isIndividuallyDeletedEntriesEmpty, isMessageDeleted, markDelete, markDelete, readEntries, readEntriesOrWait, readEntriesOrWait, recoverFromLedger, replayEntries, resetCursor, rewind, seek, setActive, setAlwaysInactive, setInactive, setThrottleMarkDelete, skipEntries, toString, trimDeletedEntries, updateLastActive

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.bookkeeper.mledger.ReadOnlyCursor

asyncReadEntries, asyncReadEntries, close, findNewestMatching, getNumberOfEntries, getReadPosition, hasMoreEntries, readEntries

Constructor Detail

ReadOnlyCursorImpl

public ReadOnlyCursorImpl(BookKeeper bookkeeper,
                          ManagedLedgerConfig config,
                          ManagedLedgerImpl ledger,
                          PositionImpl startPosition,
                          String cursorName)

Method Detail

skipEntries

public void skipEntries(int numEntriesToSkip)

Description copied from interface: ReadOnlyCursor

Skip n entries from the read position of this cursor.

Specified by:

skipEntries in interface ReadOnlyCursor

Parameters:

numEntriesToSkip - number of entries to skip

asyncClose

public void asyncClose(AsyncCallbacks.CloseCallback callback,
                       Object ctx)

Description copied from interface: ManagedCursor

Close the cursor asynchronously and release the associated resources.

Specified by:

asyncClose in interface ManagedCursor

Specified by:

asyncClose in interface ReadOnlyCursor

Overrides:

asyncClose in class ManagedCursorImpl

Parameters:

callback - callback object

ctx - opaque context

getCurrentLedgerInfo

public MLDataFormats.ManagedLedgerInfo.LedgerInfo getCurrentLedgerInfo()

getNumberOfEntries

public long getNumberOfEntries(com.google.common.collect.Range<PositionImpl> range)

Description copied from interface: ReadOnlyCursor

Return the number of messages that this cursor still has to read.

This method has linear time complexity on the number of ledgers included in the managed ledger.

Specified by:

getNumberOfEntries in interface ReadOnlyCursor

Overrides:

getNumberOfEntries in class ManagedCursorImpl

Parameters:

range - the range between two positions

Returns:

the number of entries in range