software.amazon.jdbc.plugin.readwritesplitting.balancer

Class StickyReaderPolicy

java.lang.Object

software.amazon.jdbc.plugin.readwritesplitting.balancer.StickyReaderPolicy

All Implemented Interfaces:

LoadBalancingPolicy

public class StickyReaderPolicy
extends java.lang.Object
implements LoadBalancingPolicy

LoadBalancingPolicy that selects a reader using the configured host-selector strategy. The unified plugin reuses a single cached reader (the sticky behavior) and only invokes this to pick a new reader when none is cached.

Constructor Summary

Constructors

Constructor and Description
StickyReaderPolicy(java.lang.String readerSelectorStrategy)

Method Summary

Modifier and Type	Method and Description
@Nullable HostSpec	pickReader(RwSplitContext ctx, java.util.List<HostSpec> candidates) Selects the reader target for this request, or null when no eligible target is available.

Methods inherited from class java.lang.Object

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

Methods inherited from interface software.amazon.jdbc.plugin.readwritesplitting.balancer.LoadBalancingPolicy

isPerQuery

Constructor Detail

StickyReaderPolicy

public StickyReaderPolicy(java.lang.String readerSelectorStrategy)

Method Detail

pickReader

public @Nullable HostSpec pickReader(RwSplitContext ctx,
                                     java.util.List<HostSpec> candidates)
                              throws java.sql.SQLException

Description copied from interface: LoadBalancingPolicy

Selects the reader target for this request, or null when no eligible target is available.

Specified by:

pickReader in interface LoadBalancingPolicy

Parameters:

ctx - the read/write splitting context

candidates - the eligible reader candidates

Returns:

the chosen reader host, or null if none is available

Throws:

java.sql.SQLException