Package org.apache.pulsar.broker.service.streamingdispatch

Class StreamingEntryReader

  • All Implemented Interfaces:
    org.apache.bookkeeper.mledger.AsyncCallbacks.ReadEntryCallback, org.apache.bookkeeper.mledger.WaitingEntryCallBack
    public class StreamingEntryReader
extends java.lang.Object
implements org.apache.bookkeeper.mledger.AsyncCallbacks.ReadEntryCallback, org.apache.bookkeeper.mledger.WaitingEntryCallBack
    Entry reader that fulfill read request by streamline the read instead of reading with micro batch.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void asyncReadEntries​(int numEntriesToRead, long maxReadSizeByte, java.lang.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​(org.apache.bookkeeper.mledger.Entry entry, java.lang.Object ctx)  
      void readEntryFailed​(org.apache.bookkeeper.mledger.ManagedLedgerException exception, java.lang.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,
                             java.lang.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​(org.apache.bookkeeper.mledger.Entry entry,
                              java.lang.Object ctx)
        Specified by:
        readEntryComplete in interface org.apache.bookkeeper.mledger.AsyncCallbacks.ReadEntryCallback

      • readEntryFailed

        public void readEntryFailed​(org.apache.bookkeeper.mledger.ManagedLedgerException exception,
                            java.lang.Object ctx)
        Specified by:
        readEntryFailed in interface org.apache.bookkeeper.mledger.AsyncCallbacks.ReadEntryCallback

      • cancelReadRequests

        public boolean cancelReadRequests()

      • entriesAvailable

        public void entriesAvailable()
        Specified by:
        entriesAvailable in interface org.apache.bookkeeper.mledger.WaitingEntryCallBack

      • getState

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