com.thinkaurelius.titan.diskstorage.log.kcvs

Class KCVSLogManager

java.lang.Object

com.thinkaurelius.titan.diskstorage.log.kcvs.KCVSLogManager

All Implemented Interfaces:

LogManager

public class KCVSLogManager
extends Object
implements LogManager

Implementation of LogManager against an arbitrary KeyColumnValueStoreManager. Issues Log instances which wrap around a KeyColumnValueStore.

Author:

Matthias Broecheler (me@matthiasb.com)

Field Summary

Fields

Modifier and Type	Field and Description
static ConfigOption<Boolean>	LOG_FIXED_PARTITION
static ConfigOption<Integer>	LOG_MAX_PARTITIONS

Constructor Summary

Constructors

Constructor and Description
KCVSLogManager(KeyColumnValueStoreManager storeManager, Configuration config) Opens a log manager against the provided KCVS store with the given configuration.
KCVSLogManager(KeyColumnValueStoreManager storeManager, Configuration config, int[] readPartitionIds) Opens a log manager against the provided KCVS store with the given configuration.

Method Summary

Methods

Modifier and Type	Method and Description
void	close() Closes the log manager and all open logs (if they haven't already been explicitly closed)
Log	openLog(String name, ReadMarker readMarker) Opens a log for the given name and starts reading from it at the given readMarker once a MessageReader is registered.

Methods inherited from class java.lang.Object

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

Field Detail

LOG_FIXED_PARTITION

public static final ConfigOption<Boolean> LOG_FIXED_PARTITION

LOG_MAX_PARTITIONS

public static final ConfigOption<Integer> LOG_MAX_PARTITIONS

Constructor Detail

KCVSLogManager

public KCVSLogManager(KeyColumnValueStoreManager storeManager,
              Configuration config)

Opens a log manager against the provided KCVS store with the given configuration.

Parameters:

storeManager -

config -

KCVSLogManager

public KCVSLogManager(KeyColumnValueStoreManager storeManager,
              Configuration config,
              int[] readPartitionIds)

Opens a log manager against the provided KCVS store with the given configuration. Also provided is a list of read-partition-ids. These only apply when readers are registered against an opened log. In that case, the readers only read from the provided list of partition ids.

Parameters:

storeManager -

config -

readPartitionIds -

Method Detail

openLog

public Log openLog(String name,
          ReadMarker readMarker)
            throws StorageException

Description copied from interface: LogManager

Opens a log for the given name and starts reading from it at the given readMarker once a MessageReader is registered.

If a log with the given name already exists, the existing log is returned and the readMarker is ignored.

Specified by:

openLog in interface LogManager

Parameters:

name - Name of the log to be opened

readMarker - Indicates where to start reading from the log once message readers are registered

Returns:

Throws:

StorageException

close

public void close()
           throws StorageException

Description copied from interface: LogManager

Closes the log manager and all open logs (if they haven't already been explicitly closed)

Specified by:

close in interface LogManager

Throws:

StorageException