software.amazon.jdbc

Class RoundRobinHostSelector

java.lang.Object

software.amazon.jdbc.RoundRobinHostSelector

All Implemented Interfaces:

HostSelector

public class RoundRobinHostSelector
extends java.lang.Object
implements HostSelector

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	RoundRobinHostSelector.RoundRobinClusterInfo

Field Summary

Fields

Modifier and Type	Field and Description
protected static java.util.concurrent.locks.ReentrantLock	lock
static AwsWrapperProperty	ROUND_ROBIN_DEFAULT_WEIGHT
static AwsWrapperProperty	ROUND_ROBIN_HOST_WEIGHT_PAIRS
protected static CacheMap<java.lang.String,RoundRobinHostSelector.RoundRobinClusterInfo>	roundRobinCache
static java.lang.String	STRATEGY_ROUND_ROBIN

Constructor Summary

Constructors

Constructor and Description
RoundRobinHostSelector()

Method Summary

Modifier and Type	Method and Description
static void	clearCache()
HostSpec	getHost(@NonNull java.util.List<HostSpec> hosts, @NonNull HostRole role, @Nullable java.util.Properties props) Selects a host with the requested role from the given host list.
static void	setRoundRobinHostWeightPairsProperty(@NonNull java.util.Properties properties, @NonNull java.util.List<HostSpec> hosts)

Methods inherited from class java.lang.Object

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

Field Detail

ROUND_ROBIN_HOST_WEIGHT_PAIRS

public static final AwsWrapperProperty ROUND_ROBIN_HOST_WEIGHT_PAIRS

ROUND_ROBIN_DEFAULT_WEIGHT

public static final AwsWrapperProperty ROUND_ROBIN_DEFAULT_WEIGHT

STRATEGY_ROUND_ROBIN

public static final java.lang.String STRATEGY_ROUND_ROBIN

See Also:

Constant Field Values

roundRobinCache

protected static final CacheMap<java.lang.String,RoundRobinHostSelector.RoundRobinClusterInfo> roundRobinCache

lock

protected static final java.util.concurrent.locks.ReentrantLock lock

Constructor Detail

RoundRobinHostSelector

public RoundRobinHostSelector()

Method Detail

setRoundRobinHostWeightPairsProperty

public static void setRoundRobinHostWeightPairsProperty(@NonNull java.util.Properties properties,
                                                        @NonNull java.util.List<HostSpec> hosts)

getHost

public HostSpec getHost(@NonNull java.util.List<HostSpec> hosts,
                        @NonNull HostRole role,
                        @Nullable java.util.Properties props)
                 throws java.sql.SQLException

Description copied from interface: HostSelector

Selects a host with the requested role from the given host list.

Specified by:

getHost in interface HostSelector

Parameters:

hosts - a list of available hosts to pick from.

role - the desired host role - either a writer or a reader.

props - connection properties that may be needed by the host selector in order to choose a host.

Returns:

a host matching the requested role

Throws:

java.sql.SQLException - if the host list does not contain any hosts matching the requested role or an error occurs while selecting a host

clearCache

public static void clearCache()