org.apache.pulsar.broker.service.streamingdispatch

Class StreamingEntryReader

java.lang.Object

org.apache.pulsar.broker.service.streamingdispatch.StreamingEntryReader

All Implemented Interfaces:

AsyncCallbacks.ReadEntryCallback, WaitingEntryCallBack

public class StreamingEntryReader
extends Object
implements AsyncCallbacks.ReadEntryCallback, WaitingEntryCallBack

Entry reader that fulfill read request by streamline the read instead of reading with micro batch.

Constructor Summary

Constructors

Constructor and Description
StreamingEntryReader()

Method Summary

Modifier and Type	Method and Description
void	asyncReadEntries(int numEntriesToRead, long maxReadSizeByte, Object ctx) Read entries in streaming way, that said instead of reading with micro batch and send entries to consumer after all entries in the batch are read from ledger, this method will fire numEntriesToRead requests to managedLedger and send entry to consumer whenever it is read && all entries before it have been sent to consumer.
boolean	cancelReadRequests()
void	entriesAvailable()
protected org.apache.pulsar.broker.service.streamingdispatch.StreamingEntryReader.State	getState()
void	readEntryComplete(Entry entry, Object ctx)
void	readEntryFailed(ManagedLedgerException exception, Object ctx)

Methods inherited from class java.lang.Object

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

Constructor Detail

StreamingEntryReader

public StreamingEntryReader()

Method Detail

asyncReadEntries

public void asyncReadEntries(int numEntriesToRead,
                             long maxReadSizeByte,
                             Object ctx)

Read entries in streaming way, that said instead of reading with micro batch and send entries to consumer after all entries in the batch are read from ledger, this method will fire numEntriesToRead requests to managedLedger and send entry to consumer whenever it is read && all entries before it have been sent to consumer.

Parameters:

numEntriesToRead - number of entry to read from ledger.

maxReadSizeByte - maximum byte will be read from ledger.

ctx - Context send along with read request.

readEntryComplete

public void readEntryComplete(Entry entry,
                              Object ctx)

Specified by:

readEntryComplete in interface AsyncCallbacks.ReadEntryCallback

readEntryFailed

public void readEntryFailed(ManagedLedgerException exception,
                            Object ctx)

Specified by:

readEntryFailed in interface AsyncCallbacks.ReadEntryCallback

cancelReadRequests

public boolean cancelReadRequests()

entriesAvailable

public void entriesAvailable()

Specified by:

entriesAvailable in interface WaitingEntryCallBack

getState

protected org.apache.pulsar.broker.service.streamingdispatch.StreamingEntryReader.State getState()