com.yugabyte.ysql

Class ClusterAwareLoadBalancer

java.lang.Object

com.yugabyte.ysql.ClusterAwareLoadBalancer

Direct Known Subclasses:

TopologyAwareLoadBalancer

public class ClusterAwareLoadBalancer
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
protected static String	columnToUseForHost
protected ArrayList<String>	currentPublicIps
static boolean	forceRefresh
protected static String	GET_SERVERS_QUERY
protected Map<String,String>	hostPortMap
protected Map<String,String>	hostPortMapPublic
protected static Logger	LOGGER
protected int	refreshListSeconds
protected Boolean	useHostColumn

Constructor Summary

Constructors

Constructor and Description
ClusterAwareLoadBalancer()

Method Summary

Modifier and Type	Method and Description
protected void	clearHostIPLists()
void	decrementHostToNumConnCount(String chosenHost)
int	getConnectionCountFor(String server)
protected ArrayList<String>	getCurrentServers(Connection conn)
static ClusterAwareLoadBalancer	getInstance(int refreshListSeconds)
String	getLeastLoadedServer(List<String> failedHosts, ArrayList<String> timedOutHosts)
protected String	getLoadBalancerType()
String	getPort(String host)
protected ArrayList<String>	getPrivateOrPublicServers(ArrayList<String> privateHosts, ArrayList<String> publicHosts)
List<String>	getServers()
Set<String>	getUnreachableHosts()
boolean	hasMorePreferredNode(String chosenHost)
static ClusterAwareLoadBalancer	instance()
protected String	loadBalancingNodes()
boolean	needsRefresh()
void	printHostToConnMap()
boolean	refresh(Connection conn)
void	setForRefresh()
void	updateConnectionMap(String host, int incDec)
protected void	updateCurrentHostList(ArrayList<String> currentPrivateIps, String host, String publicIp, String cloud, String region, String zone)
void	updateFailedHosts(String chosenHost)
protected void	updatePriorityMap(String host, String cloud, String region, String zone)

Methods inherited from class java.lang.Object

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

Field Detail

GET_SERVERS_QUERY

protected static final String GET_SERVERS_QUERY

See Also:

Constant Field Values

LOGGER

protected static final Logger LOGGER

hostPortMap

protected Map<String,String> hostPortMap

hostPortMapPublic

protected Map<String,String> hostPortMapPublic

currentPublicIps

protected ArrayList<String> currentPublicIps

useHostColumn

protected Boolean useHostColumn

refreshListSeconds

protected int refreshListSeconds

forceRefresh

public static boolean forceRefresh

columnToUseForHost

protected static String columnToUseForHost

Constructor Detail

ClusterAwareLoadBalancer

public ClusterAwareLoadBalancer()

Method Detail

instance

public static ClusterAwareLoadBalancer instance()

getInstance

public static ClusterAwareLoadBalancer getInstance(int refreshListSeconds)

getPort

public String getPort(String host)

hasMorePreferredNode

public boolean hasMorePreferredNode(String chosenHost)

getLeastLoadedServer

public String getLeastLoadedServer(List<String> failedHosts,
                                   ArrayList<String> timedOutHosts)

needsRefresh

public boolean needsRefresh()

getCurrentServers

protected ArrayList<String> getCurrentServers(Connection conn)
                                       throws SQLException

Throws:

SQLException

updatePriorityMap

protected void updatePriorityMap(String host,
                                 String cloud,
                                 String region,
                                 String zone)

clearHostIPLists

protected void clearHostIPLists()

getPrivateOrPublicServers

protected ArrayList<String> getPrivateOrPublicServers(ArrayList<String> privateHosts,
                                                      ArrayList<String> publicHosts)

updateCurrentHostList

protected void updateCurrentHostList(ArrayList<String> currentPrivateIps,
                                     String host,
                                     String publicIp,
                                     String cloud,
                                     String region,
                                     String zone)

getLoadBalancerType

protected String getLoadBalancerType()

refresh

public boolean refresh(Connection conn)
                throws SQLException

Throws:

SQLException

getServers

public List<String> getServers()

updateConnectionMap

public void updateConnectionMap(String host,
                                int incDec)

decrementHostToNumConnCount

public void decrementHostToNumConnCount(String chosenHost)

getUnreachableHosts

public Set<String> getUnreachableHosts()

updateFailedHosts

public void updateFailedHosts(String chosenHost)

loadBalancingNodes

protected String loadBalancingNodes()

setForRefresh

public void setForRefresh()

printHostToConnMap

public void printHostToConnMap()

getConnectionCountFor

public int getConnectionCountFor(String server)