org.janusgraph.diskstorage.common

Class DistributedStoreManager

java.lang.Object

org.janusgraph.diskstorage.common.AbstractStoreManager

org.janusgraph.diskstorage.common.DistributedStoreManager

All Implemented Interfaces:

StoreManager

public abstract class DistributedStoreManager
extends AbstractStoreManager

Abstract class that handles configuration options shared by all distributed storage backends

Author:

Matthias Broecheler (me@matthiasb.com)

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	DistributedStoreManager.Deployment
static class	DistributedStoreManager.MaskedTimestamp Helper class to create the deletion and addition timestamps for a particular transaction.

Field Summary

Fields

Modifier and Type	Field and Description
protected Duration	connectionTimeoutMS
protected String[]	hostnames
protected int	pageSize
protected String	password
protected int	port
protected TimestampProvider	times
protected String	username

Fields inherited from class org.janusgraph.diskstorage.common.AbstractStoreManager

assignTimestamp, batchLoading, storageConfig, transactional

Constructor Summary

Constructors

Constructor and Description
DistributedStoreManager(Configuration storageConfig, int portDefault)

Method Summary

Modifier and Type	Method and Description
abstract DistributedStoreManager.Deployment	getDeployment() Returns the DistributedStoreManager.Deployment mode of this connection to the storage backend
int	getPageSize() Returns the default configured page size for this storage backend.
protected String	getSingleHostname() Returns a randomly chosen host name.
TimestampProvider	getTimestampProvider()
boolean	hasAuthentication() Whether authentication is enabled for this storage backend
protected void	sleepAfterWrite(DistributedStoreManager.MaskedTimestamp mustPass)
String	toString()

Methods inherited from class org.janusgraph.diskstorage.common.AbstractStoreManager

getMetaDataSchema, getStorageConfig, isAssignTimestamp

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.janusgraph.diskstorage.keycolumnvalue.StoreManager

beginTransaction, clearStorage, close, exists, getFeatures, getHadoopManager, getLocalKeyPartition, getName

Field Detail

times

protected final TimestampProvider times

hostnames

protected final String[] hostnames

port

protected final int port

connectionTimeoutMS

protected final Duration connectionTimeoutMS

pageSize

protected final int pageSize

username

protected final String username

password

protected final String password

Constructor Detail

DistributedStoreManager

public DistributedStoreManager(Configuration storageConfig,
                               int portDefault)

Method Detail

getSingleHostname

protected String getSingleHostname()

Returns a randomly chosen host name. This is used to pick one host when multiple are configured

Returns:

hasAuthentication

public boolean hasAuthentication()

Whether authentication is enabled for this storage backend

Returns:

getPageSize

public int getPageSize()

Returns the default configured page size for this storage backend. The page size is used to determine the number of records to request at a time when streaming result data.

Returns:

getTimestampProvider

public TimestampProvider getTimestampProvider()

getDeployment

public abstract DistributedStoreManager.Deployment getDeployment()

Returns the DistributedStoreManager.Deployment mode of this connection to the storage backend

Returns:

toString

public String toString()

Overrides:

toString in class Object

sleepAfterWrite

protected void sleepAfterWrite(DistributedStoreManager.MaskedTimestamp mustPass)
                        throws BackendException

Throws:

BackendException