ManagedCursor (Managed Ledger 2.10.0-rc-202203052206 API)

All Known Implementing Classes:

ManagedCursorImpl, NonDurableCursorImpl, ReadOnlyCursorImpl
```
@InterfaceAudience.LimitedPrivate
 @InterfaceStability.Stable
public interface ManagedCursor
```
A ManagedCursor is a persisted cursor inside a ManagedLedger.
The ManagedCursor is used to read from the ManagedLedger and to signal when the consumer is done with the messages that it has read before.

Nested Class Summary

Nested Classes
Modifier and Type Interface and Description

static class ManagedCursor.FindPositionConstraint

static class ManagedCursor.IndividualDeletedEntries

Nested Classes
Modifier and Type	Interface and Description
`static class`	`ManagedCursor.FindPositionConstraint`
`static class`	`ManagedCursor.IndividualDeletedEntries`

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method and Description
`void`	`asyncClearBacklog(AsyncCallbacks.ClearBacklogCallback callback, Object ctx)` Clear the cursor backlog.
`void`	`asyncClose(AsyncCallbacks.CloseCallback callback, Object ctx)` Close the cursor asynchronously and release the associated resources.
`void`	`asyncDelete(Iterable<Position> position, AsyncCallbacks.DeleteCallback callback, Object ctx)` Delete a group of messages asynchronously Mark a group of messages for deletion.
`void`	`asyncDelete(Position position, AsyncCallbacks.DeleteCallback callback, Object ctx)` Delete a single message asynchronously Mark a single message for deletion.
`void`	`asyncFindNewestMatching(ManagedCursor.FindPositionConstraint constraint, com.google.common.base.Predicate<Entry> condition, AsyncCallbacks.FindEntryCallback callback, Object ctx)` Find the newest entry that matches the given predicate.
`void`	`asyncGetNthEntry(int n, ManagedCursor.IndividualDeletedEntries deletedEntries, AsyncCallbacks.ReadEntryCallback callback, Object ctx)` Asynchronously get 'N'th entry from the mark delete position in the cursor without updating any cursor positions.
`void`	`asyncMarkDelete(Position position, AsyncCallbacks.MarkDeleteCallback callback, Object ctx)` Asynchronous mark delete.
`void`	`asyncMarkDelete(Position position, Map<String,Long> properties, AsyncCallbacks.MarkDeleteCallback callback, Object ctx)` Asynchronous mark delete.
`void`	`asyncReadEntries(int numberOfEntriesToRead, AsyncCallbacks.ReadEntriesCallback callback, Object ctx, PositionImpl maxPosition)` Asynchronously read entries from the ManagedLedger.
`void`	`asyncReadEntries(int numberOfEntriesToRead, long maxSizeBytes, AsyncCallbacks.ReadEntriesCallback callback, Object ctx, PositionImpl maxPosition)` Asynchronously read entries from the ManagedLedger.
`void`	`asyncReadEntriesOrWait(int numberOfEntriesToRead, AsyncCallbacks.ReadEntriesCallback callback, Object ctx, PositionImpl maxPosition)` Asynchronously read entries from the ManagedLedger.
`void`	`asyncReadEntriesOrWait(int maxEntries, long maxSizeBytes, AsyncCallbacks.ReadEntriesCallback callback, Object ctx, PositionImpl maxPosition)` Asynchronously read entries from the ManagedLedger, up to the specified number and size.
`Set<? extends Position>`	`asyncReplayEntries(Set<? extends Position> positions, AsyncCallbacks.ReadEntriesCallback callback, Object ctx)` Read the specified set of positions from ManagedLedger without ordering.
`Set<? extends Position>`	`asyncReplayEntries(Set<? extends Position> positions, AsyncCallbacks.ReadEntriesCallback callback, Object ctx, boolean sortEntries)` Read the specified set of positions from ManagedLedger.
`void`	`asyncResetCursor(Position position, boolean forceReset, AsyncCallbacks.ResetCursorCallback callback)` reset the cursor to specified position to enable replay of messages.
`void`	`asyncSkipEntries(int numEntriesToSkip, ManagedCursor.IndividualDeletedEntries deletedEntries, AsyncCallbacks.SkipEntriesCallback callback, Object ctx)` Skip n entries from the read position of this cursor.
`boolean`	`cancelPendingReadRequest()` Cancel a previously scheduled asyncReadEntriesOrWait operation.
`boolean`	`checkAndUpdateReadPositionChanged()` Checks if read position changed since this method was called last time.
`void`	`clearBacklog()` Clear the cursor backlog.
`void`	`close()` Close the cursor and releases the associated resources.
`void`	`delete(Iterable<Position> positions)` Delete a group of entries.
`void`	`delete(Position position)` Delete a single message.
`Position`	`findNewestMatching(ManagedCursor.FindPositionConstraint constraint, com.google.common.base.Predicate<Entry> condition)` Find the newest entry that matches the given predicate.
`Position`	`findNewestMatching(com.google.common.base.Predicate<Entry> condition)` Find the newest entry that matches the given predicate.
`long[]`	`getDeletedBatchIndexesAsLongArray(PositionImpl position)` Get deleted batch indexes list for a batch message.
`long`	`getEstimatedSizeSinceMarkDeletePosition()` Returns the estimated size of the unacknowledged backlog for this cursor.
`Position`	`getFirstPosition()` Get the first position.
`long`	`getLastActive()` Get the last active time of the cursor.
`com.google.common.collect.Range<PositionImpl>`	`getLastIndividualDeletedRange()` Get last individual deleted range.
`ManagedLedger`	`getManagedLedger()` Get `ManagedLedger` attached with cursor.
`Position`	`getMarkDeletedPosition()` Get the newest mark deleted position on this cursor.
`String`	`getName()` Get the unique cursor name.
`int`	`getNonContiguousDeletedMessagesRangeSerializedSize()` Returns the serialized size of mark-Delete ranges.
`Entry`	`getNthEntry(int n, ManagedCursor.IndividualDeletedEntries deletedEntries)` Get 'N'th entry from the mark delete position in the cursor without updating any cursor positions.
`long`	`getNumberOfEntries()` Return the number of messages that this cursor still has to read.
`long`	`getNumberOfEntriesInBacklog(boolean isPrecise)` Return the number of non-deleted messages on this cursor.
`long`	`getNumberOfEntriesSinceFirstNotAckedMessage()` Returns total number of entries from the first not-acked message to current dispatching position.
`Position`	`getPersistentMarkDeletedPosition()` Get the persistent newest mark deleted position on this cursor.
`Map<String,Long>`	`getProperties()` Return any properties that were associated with the last stored position.
`Position`	`getReadPosition()` Get the read position.
`ManagedCursorMXBean`	`getStats()`
`double`	`getThrottleMarkDelete()` Returns cursor throttle mark-delete rate.
`int`	`getTotalNonContiguousDeletedMessagesRange()` Returns number of mark-Delete range.
`boolean`	`hasMoreEntries()` Tells whether this cursor has already consumed all the available entries.
`boolean`	`isActive()` Checks if cursor is active or not.
`boolean`	`isClosed()` Checks if the cursor is closed.
`boolean`	`isDurable()` Tells whether the cursor is durable or just kept in memory.
`void`	`markDelete(Position position)` This signals that the reader is done with all the entries up to "position" (included).
`void`	`markDelete(Position position, Map<String,Long> properties)` This signals that the reader is done with all the entries up to "position" (included).
`boolean`	`putProperty(String key, Long value)` Add a property associated with the last stored position.
`List<Entry>`	`readEntries(int numberOfEntriesToRead)` Read entries from the ManagedLedger, up to the specified number.
`List<Entry>`	`readEntriesOrWait(int numberOfEntriesToRead)` Read entries from the ManagedLedger, up to the specified number.
`List<Entry>`	`readEntriesOrWait(int maxEntries, long maxSizeBytes)` Read entries from the ManagedLedger, up to the specified number and size.
`boolean`	`removeProperty(String key)` Remove a property associated with the last stored position.
`List<Entry>`	`replayEntries(Set<? extends Position> positions)` Read the specified set of positions from ManagedLedger.
`void`	`resetCursor(Position position)` reset the cursor to specified position to enable replay of messages.
`void`	`rewind()` Rewind the cursor to the mark deleted position to replay all the already read but not yet mark deleted messages.
`default void`	`seek(Position newReadPosition)` Move the cursor to a different read position.
`void`	`seek(Position newReadPosition, boolean force)`
`void`	`setActive()` Activate cursor: EntryCacheManager caches entries only for activated-cursors.
`void`	`setAlwaysInactive()` A cursor that is set as always-inactive will never trigger the caching of entries.
`void`	`setInactive()` Deactivate cursor.
`void`	`setThrottleMarkDelete(double throttleMarkDelete)` Update throttle mark delete rate.
`void`	`skipEntries(int numEntriesToSkip, ManagedCursor.IndividualDeletedEntries deletedEntries)` Skip n entries from the read position of this cursor.
`void`	`trimDeletedEntries(List<Entry> entries)` Trim delete entries for the given entries.
`void`	`updateLastActive()` Update the last active time of the cursor.

- Method Detail
  - getName
```
String getName()
```
    Get the unique cursor name.
    
    Returns:
    
    the cursor name
  - getLastActive
```
long getLastActive()
```
    Get the last active time of the cursor.
    
    Returns:
    
    the last active time of the cursor
  - updateLastActive
```
void updateLastActive()
```
    Update the last active time of the cursor.
  - getProperties
```
Map<String,Long> getProperties()
```
    Return any properties that were associated with the last stored position.
  - putProperty
```
boolean putProperty(String key,
                    Long value)
```
    Add a property associated with the last stored position.
  - removeProperty
```
boolean removeProperty(String key)
```
    Remove a property associated with the last stored position.
  - readEntries
```
List<Entry> readEntries(int numberOfEntriesToRead)
                 throws InterruptedException,
                        ManagedLedgerException
```
    Read entries from the ManagedLedger, up to the specified number. The returned list can be smaller.
    
    Parameters:
    
    numberOfEntriesToRead - maximum number of entries to return
    
    Returns:
    
    the list of entries
    
    Throws:
    
    ManagedLedgerException
    
    InterruptedException
  - asyncReadEntries
```
void asyncReadEntries(int numberOfEntriesToRead,
                      AsyncCallbacks.ReadEntriesCallback callback,
                      Object ctx,
                      PositionImpl maxPosition)
```
    Asynchronously read entries from the ManagedLedger.
    
    Parameters:
    
    numberOfEntriesToRead - maximum number of entries to return
    
    callback - callback object
    
    ctx - opaque context
    
    maxPosition - max position can read
    
    See Also:
    
    readEntries(int)
  - asyncReadEntries
```
void asyncReadEntries(int numberOfEntriesToRead,
                      long maxSizeBytes,
                      AsyncCallbacks.ReadEntriesCallback callback,
                      Object ctx,
                      PositionImpl maxPosition)
```
    Asynchronously read entries from the ManagedLedger.
    
    Parameters:
    
    numberOfEntriesToRead - maximum number of entries to return
    
    maxSizeBytes - max size in bytes of the entries to return
    
    callback - callback object
    
    ctx - opaque context
    
    maxPosition - max position can read
  - getNthEntry
```
Entry getNthEntry(int n,
                  ManagedCursor.IndividualDeletedEntries deletedEntries)
           throws InterruptedException,
                  ManagedLedgerException
```
    Get 'N'th entry from the mark delete position in the cursor without updating any cursor positions.
    
    Parameters:
    
    n - entry position
    
    deletedEntries - skip individual deleted entries
    
    Returns:
    
    the entry
    
    Throws:
    
    InterruptedException
    
    ManagedLedgerException
  - asyncGetNthEntry
```
void asyncGetNthEntry(int n,
                      ManagedCursor.IndividualDeletedEntries deletedEntries,
                      AsyncCallbacks.ReadEntryCallback callback,
                      Object ctx)
```
    Asynchronously get 'N'th entry from the mark delete position in the cursor without updating any cursor positions.
    
    Parameters:
    
    n - entry position
    
    deletedEntries - skip individual deleted entries
    
    callback -
    
    ctx -
  - readEntriesOrWait
```
List<Entry> readEntriesOrWait(int numberOfEntriesToRead)
                       throws InterruptedException,
                              ManagedLedgerException
```
    Read entries from the ManagedLedger, up to the specified number. The returned list can be smaller.
    If no entries are available, the method will block until at least a new message will be persisted.
    
    Parameters:
    
    numberOfEntriesToRead - maximum number of entries to return
    
    Returns:
    
    the list of entries
    
    Throws:
    
    ManagedLedgerException
    
    InterruptedException
  - readEntriesOrWait
```
List<Entry> readEntriesOrWait(int maxEntries,
                              long maxSizeBytes)
                       throws InterruptedException,
                              ManagedLedgerException
```
    Read entries from the ManagedLedger, up to the specified number and size.
    If no entries are available, the method will block until at least a new message will be persisted.
    
    Parameters:
    
    maxEntries - maximum number of entries to return
    
    maxSizeBytes - max size in bytes of the entries to return
    
    Returns:
    
    the list of entries
    
    Throws:
    
    ManagedLedgerException
    
    InterruptedException
  - asyncReadEntriesOrWait
```
void asyncReadEntriesOrWait(int numberOfEntriesToRead,
                            AsyncCallbacks.ReadEntriesCallback callback,
                            Object ctx,
                            PositionImpl maxPosition)
```
    Asynchronously read entries from the ManagedLedger.
    If no entries are available, the callback will not be triggered. Instead it will be registered to wait until a new message will be persisted into the managed ledger
    
    Parameters:
    
    numberOfEntriesToRead - maximum number of entries to return
    
    callback - callback object
    
    ctx - opaque context
    
    maxPosition - max position can read
    
    See Also:
    
    readEntriesOrWait(int)
  - asyncReadEntriesOrWait
```
void asyncReadEntriesOrWait(int maxEntries,
                            long maxSizeBytes,
                            AsyncCallbacks.ReadEntriesCallback callback,
                            Object ctx,
                            PositionImpl maxPosition)
```
    Asynchronously read entries from the ManagedLedger, up to the specified number and size.
    If no entries are available, the callback will not be triggered. Instead it will be registered to wait until a new message will be persisted into the managed ledger
    
    Parameters:
    
    maxEntries - maximum number of entries to return
    
    maxSizeBytes - max size in bytes of the entries to return
    
    callback - callback object
    
    ctx - opaque context
    
    maxPosition - max position can read
    
    See Also:
    
    readEntriesOrWait(int, long)
  - cancelPendingReadRequest
```
boolean cancelPendingReadRequest()
```
    Cancel a previously scheduled asyncReadEntriesOrWait operation.
    
    Returns:
    
    true if the read operation was canceled or false if there was no pending operation
    
    See Also:
    
    #asyncReadEntriesOrWait(int, ReadEntriesCallback, Object, PositionImpl)
  - hasMoreEntries
```
boolean hasMoreEntries()
```
    Tells whether this cursor has already consumed all the available entries.
    This method is not blocking.
    
    Returns:
    
    true if there are pending entries to read, false otherwise
  - getNumberOfEntries
```
long getNumberOfEntries()
```
    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.
    
    Returns:
    
    the number of entries
  - getNumberOfEntriesInBacklog
```
long getNumberOfEntriesInBacklog(boolean isPrecise)
```
    Return the number of non-deleted messages on this cursor.
    This will also include messages that have already been read from the cursor but not deleted or mark-deleted yet.
    This method has linear time complexity on the number of ledgers included in the managed ledger.
    
    Parameters:
    
    isPrecise - set to true to get precise backlog count
    
    Returns:
    
    the number of entries
  - markDelete
```
void markDelete(Position position)
         throws InterruptedException,
                ManagedLedgerException
```
    This signals that the reader is done with all the entries up to "position" (included). This can potentially trigger a ledger deletion, if all the other cursors are done too with the underlying ledger.
    
    Parameters:
    
    position - the last position that have been successfully consumed
    
    Throws:
    
    ManagedLedgerException
    
    InterruptedException
  - markDelete
```
void markDelete(Position position,
                Map<String,Long> properties)
         throws InterruptedException,
                ManagedLedgerException
```
    This signals that the reader is done with all the entries up to "position" (included). This can potentially trigger a ledger deletion, if all the other cursors are done too with the underlying ledger.
    
    Parameters:
    
    position - the last position that have been successfully consumed
    
    properties - additional user-defined properties that can be associated with a particular cursor position
    
    Throws:
    
    ManagedLedgerException
    
    InterruptedException
  - asyncMarkDelete
```
void asyncMarkDelete(Position position,
                     AsyncCallbacks.MarkDeleteCallback callback,
                     Object ctx)
```
    Asynchronous mark delete.
    
    Parameters:
    
    position - the last position that have been successfully consumed
    
    callback - callback object
    
    ctx - opaque context
    
    See Also:
    
    markDelete(Position)
  - asyncMarkDelete
```
void asyncMarkDelete(Position position,
                     Map<String,Long> properties,
                     AsyncCallbacks.MarkDeleteCallback callback,
                     Object ctx)
```
    Asynchronous mark delete.
    
    Parameters:
    
    position - the last position that have been successfully consumed
    
    properties - additional user-defined properties that can be associated with a particular cursor position
    
    callback - callback object
    
    ctx - opaque context
    
    See Also:
    
    markDelete(Position)
  - delete
```
void delete(Position position)
     throws InterruptedException,
            ManagedLedgerException
```
    Delete a single message.
    Mark a single message for deletion. When all the previous messages are all deleted, then markDelete() will be called internally to advance the persistent acknowledged position.
    The deletion of the message is not persisted into the durable storage and cannot be recovered upon the reopening of the ManagedLedger
    
    Parameters:
    
    position - the position of the message to be deleted
    
    Throws:
    
    InterruptedException
    
    ManagedLedgerException
  - asyncDelete
```
void asyncDelete(Position position,
                 AsyncCallbacks.DeleteCallback callback,
                 Object ctx)
```
    Delete a single message asynchronously
    Mark a single message for deletion. When all the previous messages are all deleted, then markDelete() will be called internally to advance the persistent acknowledged position.
    The deletion of the message is not persisted into the durable storage and cannot be recovered upon the reopening of the ManagedLedger
    
    Parameters:
    
    position - the position of the message to be deleted
    
    callback - callback object
    
    ctx - opaque context
  - delete
```
void delete(Iterable<Position> positions)
     throws InterruptedException,
            ManagedLedgerException
```
    Delete a group of entries.
    Mark multiple single messages for deletion. When all the previous messages are all deleted, then markDelete() will be called internally to advance the persistent acknowledged position.
    The deletion of the message is not persisted into the durable storage and cannot be recovered upon the reopening of the ManagedLedger
    
    Parameters:
    
    positions - positions of the messages to be deleted
    
    Throws:
    
    InterruptedException
    
    ManagedLedgerException
  - asyncDelete
```
void asyncDelete(Iterable<Position> position,
                 AsyncCallbacks.DeleteCallback callback,
                 Object ctx)
```
    Delete a group of messages asynchronously
    Mark a group of messages for deletion. When all the previous messages are all deleted, then markDelete() will be called internally to advance the persistent acknowledged position.
    The deletion of the messages is not persisted into the durable storage and cannot be recovered upon the reopening of the ManagedLedger
    
    Parameters:
    
    position - the positions of the messages to be deleted
    
    callback - callback object
    
    ctx - opaque context
  - getReadPosition
```
Position getReadPosition()
```
    Get the read position. This points to the next message to be read from the cursor.
    
    Returns:
    
    the read position
  - getMarkDeletedPosition
```
Position getMarkDeletedPosition()
```
    Get the newest mark deleted position on this cursor.
    
    Returns:
    
    the mark deleted position
  - getPersistentMarkDeletedPosition
```
Position getPersistentMarkDeletedPosition()
```
    Get the persistent newest mark deleted position on this cursor.
    
    Returns:
    
    the persistent mark deleted position
  - rewind
```
void rewind()
```
    Rewind the cursor to the mark deleted position to replay all the already read but not yet mark deleted messages.
    The next message to be read is the one after the current mark deleted message.
  - seek
```
default void seek(Position newReadPosition)
```
    Move the cursor to a different read position.
    If the new position happens to be before the already mark deleted position, it will be set to the mark deleted position instead.
    
    Parameters:
    
    newReadPosition - the position where to move the cursor
  - seek
```
void seek(Position newReadPosition,
          boolean force)
```
  - clearBacklog
```
void clearBacklog()
           throws InterruptedException,
                  ManagedLedgerException
```
    Clear the cursor backlog.
    Consume all the entries for this cursor.
    
    Throws:
    
    InterruptedException
    
    ManagedLedgerException
  - asyncClearBacklog
```
void asyncClearBacklog(AsyncCallbacks.ClearBacklogCallback callback,
                       Object ctx)
```
    Clear the cursor backlog.
    Consume all the entries for this cursor.
    
    Parameters:
    
    callback - callback object
    
    ctx - opaque context
  - skipEntries
```
void skipEntries(int numEntriesToSkip,
                 ManagedCursor.IndividualDeletedEntries deletedEntries)
          throws InterruptedException,
                 ManagedLedgerException
```
    Skip n entries from the read position of this cursor.
    
    Parameters:
    
    numEntriesToSkip - number of entries to skip
    
    deletedEntries - skip individual deleted entries
    
    Throws:
    
    InterruptedException
    
    ManagedLedgerException
  - asyncSkipEntries
```
void asyncSkipEntries(int numEntriesToSkip,
                      ManagedCursor.IndividualDeletedEntries deletedEntries,
                      AsyncCallbacks.SkipEntriesCallback callback,
                      Object ctx)
```
    Skip n entries from the read position of this cursor.
    
    Parameters:
    
    numEntriesToSkip - number of entries to skip
    
    deletedEntries - skip individual deleted entries
    
    callback - callback object
    
    ctx - opaque context
  - findNewestMatching
```
Position findNewestMatching(com.google.common.base.Predicate<Entry> condition)
                     throws InterruptedException,
                            ManagedLedgerException
```
    Find the newest entry that matches the given predicate. Will only search among active entries
    
    Parameters:
    
    condition - predicate that reads an entry an applies a condition
    
    Returns:
    
    Position of the newest entry that matches the given predicate
    
    Throws:
    
    InterruptedException
    
    ManagedLedgerException
  - findNewestMatching
```
Position findNewestMatching(ManagedCursor.FindPositionConstraint constraint,
                            com.google.common.base.Predicate<Entry> condition)
                     throws InterruptedException,
                            ManagedLedgerException
```
    Find the newest entry that matches the given predicate.
    
    Parameters:
    
    constraint - search only active entries or all entries
    
    condition - predicate that reads an entry an applies a condition
    
    Returns:
    
    Position of the newest entry that matches the given predicate
    
    Throws:
    
    InterruptedException
    
    ManagedLedgerException
  - asyncFindNewestMatching
```
void asyncFindNewestMatching(ManagedCursor.FindPositionConstraint constraint,
                             com.google.common.base.Predicate<Entry> condition,
                             AsyncCallbacks.FindEntryCallback callback,
                             Object ctx)
```
    Find the newest entry that matches the given predicate.
    
    Parameters:
    
    constraint - search only active entries or all entries
    
    condition - predicate that reads an entry an applies a condition
    
    callback - callback object returning the resultant position
    
    ctx - opaque context
  - resetCursor
```
void resetCursor(Position position)
          throws InterruptedException,
                 ManagedLedgerException
```
    reset the cursor to specified position to enable replay of messages.
    
    Parameters:
    
    position - position to move the cursor to
    
    Throws:
    
    InterruptedException
    
    ManagedLedgerException
  - asyncResetCursor
```
void asyncResetCursor(Position position,
                      boolean forceReset,
                      AsyncCallbacks.ResetCursorCallback callback)
```
    reset the cursor to specified position to enable replay of messages.
    
    Parameters:
    
    position - position to move the cursor to
    
    forceReset - whether to force reset the position even if the position is no longer in the managed ledger, this is used by compacted topic which has data in the compacted ledger, to ensure the cursor can read data from the compacted ledger.
    
    callback - callback object
  - replayEntries
```
List<Entry> replayEntries(Set<? extends Position> positions)
                   throws InterruptedException,
                          ManagedLedgerException
```
    Read the specified set of positions from ManagedLedger.
    
    Parameters:
    
    positions - set of positions to read
    
    Returns:
    
    the list of entries
    
    Throws:
    
    InterruptedException
    
    ManagedLedgerException
  - asyncReplayEntries
```
Set<? extends Position> asyncReplayEntries(Set<? extends Position> positions,
                                           AsyncCallbacks.ReadEntriesCallback callback,
                                           Object ctx)
```
    Read the specified set of positions from ManagedLedger without ordering.
    
    Parameters:
    
    positions - set of positions to read
    
    callback - callback object returning the list of entries
    
    ctx - opaque context
    
    Returns:
    
    skipped positions set of positions which are already deleted/acknowledged and skipped while replaying them
  - asyncReplayEntries
```
Set<? extends Position> asyncReplayEntries(Set<? extends Position> positions,
                                           AsyncCallbacks.ReadEntriesCallback callback,
                                           Object ctx,
                                           boolean sortEntries)
```
    Read the specified set of positions from ManagedLedger.
    
    Parameters:
    
    positions - set of positions to read
    
    callback - callback object returning the list of entries
    
    ctx - opaque context
    
    sortEntries - callback with sorted entry list.
    
    Returns:
    
    skipped positions set of positions which are already deleted/acknowledged and skipped while replaying them
  - close
```
void close()
    throws InterruptedException,
           ManagedLedgerException
```
    Close the cursor and releases the associated resources.
    
    Throws:
    
    InterruptedException
    
    ManagedLedgerException
  - asyncClose
```
void asyncClose(AsyncCallbacks.CloseCallback callback,
                Object ctx)
```
    Close the cursor asynchronously and release the associated resources.
    
    Parameters:
    
    callback - callback object
    
    ctx - opaque context
  - getFirstPosition
```
Position getFirstPosition()
```
    Get the first position.
    
    Returns:
    
    the first position
  - setActive
```
void setActive()
```
    Activate cursor: EntryCacheManager caches entries only for activated-cursors.
  - setInactive
```
void setInactive()
```
    Deactivate cursor.
  - setAlwaysInactive
```
void setAlwaysInactive()
```
    A cursor that is set as always-inactive will never trigger the caching of entries.
  - isActive
```
boolean isActive()
```
    Checks if cursor is active or not.
    
    Returns:
  - isDurable
```
boolean isDurable()
```
    Tells whether the cursor is durable or just kept in memory.
  - getNumberOfEntriesSinceFirstNotAckedMessage
```
long getNumberOfEntriesSinceFirstNotAckedMessage()
```
    Returns total number of entries from the first not-acked message to current dispatching position.
    
    Returns:
  - getTotalNonContiguousDeletedMessagesRange
```
int getTotalNonContiguousDeletedMessagesRange()
```
    Returns number of mark-Delete range.
    
    Returns:
  - getNonContiguousDeletedMessagesRangeSerializedSize
```
int getNonContiguousDeletedMessagesRangeSerializedSize()
```
    Returns the serialized size of mark-Delete ranges.
  - getEstimatedSizeSinceMarkDeletePosition
```
long getEstimatedSizeSinceMarkDeletePosition()
```
    Returns the estimated size of the unacknowledged backlog for this cursor.
    
    Returns:
    
    the estimated size from the mark delete position of the cursor
  - getThrottleMarkDelete
```
double getThrottleMarkDelete()
```
    Returns cursor throttle mark-delete rate.
    
    Returns:
  - setThrottleMarkDelete
```
void setThrottleMarkDelete(double throttleMarkDelete)
```
    Update throttle mark delete rate.
  - getManagedLedger
```
ManagedLedger getManagedLedger()
```
    Get ManagedLedger attached with cursor.
    
    Returns:
    
    ManagedLedger
  - getLastIndividualDeletedRange
```
com.google.common.collect.Range<PositionImpl> getLastIndividualDeletedRange()
```
    Get last individual deleted range.
    
    Returns:
    
    range
  - trimDeletedEntries
```
void trimDeletedEntries(List<Entry> entries)
```
    Trim delete entries for the given entries.
  - getDeletedBatchIndexesAsLongArray
```
long[] getDeletedBatchIndexesAsLongArray(PositionImpl position)
```
    Get deleted batch indexes list for a batch message.
  - getStats
```
ManagedCursorMXBean getStats()
```
    Returns:
    
    the managed cursor stats MBean
  - checkAndUpdateReadPositionChanged
```
boolean checkAndUpdateReadPositionChanged()
```
    Checks if read position changed since this method was called last time.
    
    Returns:
    
    if read position changed
  - isClosed
```
boolean isClosed()
```
    Checks if the cursor is closed.
    
    Returns:
    
    whether this cursor is closed.

Interface ManagedCursor

Nested Class Summary

Method Summary

Method Detail

getName

getLastActive

updateLastActive

getProperties

putProperty

removeProperty

readEntries

asyncReadEntries

asyncReadEntries

getNthEntry

asyncGetNthEntry

readEntriesOrWait

readEntriesOrWait

asyncReadEntriesOrWait

asyncReadEntriesOrWait

cancelPendingReadRequest

hasMoreEntries

getNumberOfEntries

getNumberOfEntriesInBacklog

markDelete

markDelete

asyncMarkDelete

asyncMarkDelete

delete

asyncDelete

delete

asyncDelete

getReadPosition

getMarkDeletedPosition

getPersistentMarkDeletedPosition

rewind

seek

seek

clearBacklog

asyncClearBacklog

skipEntries

asyncSkipEntries

findNewestMatching

findNewestMatching

asyncFindNewestMatching

resetCursor

asyncResetCursor

replayEntries

asyncReplayEntries

asyncReplayEntries

close

asyncClose

getFirstPosition

setActive

setInactive

setAlwaysInactive

isActive

isDurable

getNumberOfEntriesSinceFirstNotAckedMessage

getTotalNonContiguousDeletedMessagesRange

getNonContiguousDeletedMessagesRangeSerializedSize

getEstimatedSizeSinceMarkDeletePosition

getThrottleMarkDelete

setThrottleMarkDelete

getManagedLedger

getLastIndividualDeletedRange

trimDeletedEntries

getDeletedBatchIndexesAsLongArray

getStats

checkAndUpdateReadPositionChanged

isClosed