Package org.apache.pulsar.metadata.bookkeeper

Class PulsarLedgerIdGenerator

java.lang.Object

org.apache.pulsar.metadata.bookkeeper.PulsarLedgerIdGenerator

All Implemented Interfaces:

Closeable, AutoCloseable, org.apache.bookkeeper.meta.LedgerIdGenerator

public class PulsarLedgerIdGenerator
extends Object
implements org.apache.bookkeeper.meta.LedgerIdGenerator

Constructor Summary

Constructors

Constructor	Description
PulsarLedgerIdGenerator(MetadataStoreExtended store, String ledgersRoot)

Method Summary

Modifier and Type	Method	Description
void	close()
void	generateLedgerId(org.apache.bookkeeper.proto.BookkeeperInternalCallbacks.GenericCallback<Long> genericCallback)
CompletableFuture<Long>	generateLedgerIdImpl(String prefix)
CompletableFuture<Boolean>	ledgerIdGenPathPresent()	Checks the existence of the long ledger id gen path.

Methods inherited from class java.lang.Object

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

Constructor Details

PulsarLedgerIdGenerator

public PulsarLedgerIdGenerator(MetadataStoreExtended store,
 String ledgersRoot)

Method Details

generateLedgerId

public void generateLedgerId(org.apache.bookkeeper.proto.BookkeeperInternalCallbacks.GenericCallback<Long> genericCallback)

Specified by:

generateLedgerId in interface org.apache.bookkeeper.meta.LedgerIdGenerator

generateLedgerIdImpl

public CompletableFuture<Long> generateLedgerIdImpl(String prefix)

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Throws:

IOException

ledgerIdGenPathPresent

public CompletableFuture<Boolean> ledgerIdGenPathPresent()

Checks the existence of the long ledger id gen path. Existence indicates we have switched from the legacy algorithm to the new method of generating 63-bit ids. If the existence is UNKNOWN, it looks in zk to find out. If it previously checked in zk, it returns that value. This value changes when we run out of ids < Integer.MAX_VALUE, and try to create the long ledger id gen path.