Class AbstractLogManager
java.lang.Object
org.nuxeo.lib.stream.log.internals.AbstractLogManager
- All Implemented Interfaces:
AutoCloseable
,LogManager
- Direct Known Subclasses:
KafkaLogManager
,MemLogManager
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Field Summary
Modifier and TypeFieldDescriptionprotected static final Name
protected final Map<Name,
CloseableLogAppender> protected final Map<LogPartitionGroup,
LogTailer> -
Constructor Summary
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Method Summary
Modifier and TypeMethodDescriptionprotected void
checkInvalidAssignment
(Name group, LogPartition partition) protected <M extends Externalizable>
voidcheckInvalidCodec
(LogPartition partition, Codec<M> codec) protected void
void
close()
protected abstract void
protected abstract <M extends Externalizable>
CloseableLogAppender<M>createAppender
(Name name, Codec<M> codec) boolean
createIfNotExists
(Name name, int size) Creates a new Log withsize
partitions if the Log does not exists.<M extends Externalizable>
LogTailer<M>createTailer
(Name group, Collection<LogPartition> partitions, Codec<M> codec) Creates a tailer for a consumergroup
and assign multiplepartitions
.boolean
Tries to delete a Log.protected abstract <M extends Externalizable>
LogTailer<M>doCreateTailer
(Collection<LogPartition> partitions, Name group, Codec<M> codec) protected abstract <M extends Externalizable>
LogTailer<M>doSubscribe
(Name group, Collection<Name> names, RebalanceListener listener, Codec<M> codec) <M extends Externalizable>
LogAppender<M>getAppender
(Name name, Codec<M> codec) Gets an appender for the Log namedname
, usescodec
to encode records.getLagPerPartition
(Name name, Name group) Returns the lag between consumergroup
and the producers for each partition.<M extends Externalizable>
List<Latency>getLatencyPerPartition
(Name name, Name group, Codec<M> codec, Function<M, Long> timestampExtractor, Function<M, String> keyExtractor) Returns the lag with latency.protected abstract int
protected <M extends Externalizable>
Codec<M>guessCodec
(Collection<LogPartition> partitions) protected <M extends Externalizable>
booleanint
Returns the number of partition of a Log.<M extends Externalizable>
LogTailer<M>subscribe
(Name group, Collection<Name> names, RebalanceListener listener, Codec<M> codec) Creates a tailer for a consumergroup
and subscribe to multiple Logs.boolean
boolean
supportSubscribe
(Name stream) Returnstrue
if theLogManager.subscribe(org.nuxeo.lib.stream.log.Name, java.util.Collection<org.nuxeo.lib.stream.log.Name>, org.nuxeo.lib.stream.log.RebalanceListener, org.nuxeo.lib.stream.codec.Codec<M>)
method is supported for the specific Log.Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods inherited from interface org.nuxeo.lib.stream.log.LogManager
createIfNotExists, createTailer, createTailer, createTailer, createTailer, createTailer, createTailer, createTailer, createTailer, createTailer, createTailer, createTailer, delete, deleteConsumers, deleteRecords, exists, exists, getAppender, getAppender, getAppender, getLag, getLag, getLagPerPartition, getLatency, getLatency, getLatencyPerPartition, listAll, listAllNames, listConsumerGroups, listConsumerGroups, size, subscribe, subscribe, subscribe
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Field Details
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ADMIN_GROUP
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appenders
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tailersAssignments
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tailers
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Constructor Details
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AbstractLogManager
public AbstractLogManager()
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Method Details
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create
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getSize
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createAppender
protected abstract <M extends Externalizable> CloseableLogAppender<M> createAppender(Name name, Codec<M> codec) -
doCreateTailer
protected abstract <M extends Externalizable> LogTailer<M> doCreateTailer(Collection<LogPartition> partitions, Name group, Codec<M> codec) -
doSubscribe
protected abstract <M extends Externalizable> LogTailer<M> doSubscribe(Name group, Collection<Name> names, RebalanceListener listener, Codec<M> codec) -
getLagPerPartition
Description copied from interface:LogManager
Returns the lag between consumergroup
and the producers for each partition. The result list is ordered, for instance index 0 is lag for partition 0.- Specified by:
getLagPerPartition
in interfaceLogManager
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createIfNotExists
Description copied from interface:LogManager
Creates a new Log withsize
partitions if the Log does not exists. Returns true it the Log has been created.- Specified by:
createIfNotExists
in interfaceLogManager
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delete
Description copied from interface:LogManager
Tries to delete a Log. Returns true if successfully deleted, might not be possible depending on the implementation.- Specified by:
delete
in interfaceLogManager
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size
Description copied from interface:LogManager
Returns the number of partition of a Log.- Specified by:
size
in interfaceLogManager
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createTailer
public <M extends Externalizable> LogTailer<M> createTailer(Name group, Collection<LogPartition> partitions, Codec<M> codec) Description copied from interface:LogManager
Creates a tailer for a consumergroup
and assign multiplepartitions
. Usescodec
to decode records. Note thatpartitions
can be from different Logs. A tailer is NOT thread safe.- Specified by:
createTailer
in interfaceLogManager
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guessCodec
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supportSubscribe
public boolean supportSubscribe()Description copied from interface:LogManager
Returnstrue
if the LogLogManager.subscribe(org.nuxeo.lib.stream.log.Name, java.util.Collection<org.nuxeo.lib.stream.log.Name>, org.nuxeo.lib.stream.log.RebalanceListener, org.nuxeo.lib.stream.codec.Codec<M>)
method is supported. Now deprecated because some implementations support subscribe only on specific Log names.- Specified by:
supportSubscribe
in interfaceLogManager
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supportSubscribe
Description copied from interface:LogManager
Returnstrue
if theLogManager.subscribe(org.nuxeo.lib.stream.log.Name, java.util.Collection<org.nuxeo.lib.stream.log.Name>, org.nuxeo.lib.stream.log.RebalanceListener, org.nuxeo.lib.stream.codec.Codec<M>)
method is supported for the specific Log.- Specified by:
supportSubscribe
in interfaceLogManager
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subscribe
public <M extends Externalizable> LogTailer<M> subscribe(Name group, Collection<Name> names, RebalanceListener listener, Codec<M> codec) Description copied from interface:LogManager
Creates a tailer for a consumergroup
and subscribe to multiple Logs. The partitions assignment is done dynamically depending on the number of subscribers. The partitions can change during tailers life, this is called a rebalancing. A listener can be used to be notified on assignment changes. Usescodec
to decode records.- Specified by:
subscribe
in interfaceLogManager
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checkInvalidAssignment
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checkInvalidCodec
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getAppender
Description copied from interface:LogManager
Gets an appender for the Log namedname
, usescodec
to encode records. An appender is thread safe.- Specified by:
getAppender
in interfaceLogManager
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sameCodec
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getLatencyPerPartition
public <M extends Externalizable> List<Latency> getLatencyPerPartition(Name name, Name group, Codec<M> codec, Function<M, Long> timestampExtractor, Function<M, String> keyExtractor) Description copied from interface:LogManager
Returns the lag with latency. Timestamps used to compute the latencies are extracted from the records. This requires to read one record per partition so it costs more thanLogManager.getLagPerPartition(Name, Name)
.Two functions need to be provided to extract the timestamp and a key from a record.
- Specified by:
getLatencyPerPartition
in interfaceLogManager
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cleanTailers
protected void cleanTailers() -
close
public void close()- Specified by:
close
in interfaceAutoCloseable
- Specified by:
close
in interfaceLogManager
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