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chore: add a random channel hint with single use transactions while u… #3065

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gcf-merge-on-green merged 3 commits into from
Apr 30, 2024
Merged

chore: add a random channel hint with single use transactions while u… #3065

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5ce399a
chore: add a random channel hint with single use transactions while u…
Apr 26, 2024
b6f4aa4
Merge branch 'googleapis:main' into mux-pr-random-hint
arpan14 Apr 29, 2024
64d1769
chore: rephrase comments.
Apr 30, 2024
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7 changes: 5 additions & 2 deletions google-cloud-spanner/src/main/java/com/google/cloud/spanner/AbstractReadContext.java
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Original file line number Diff line number Diff line change
Expand Up @@ -190,8 +190,11 @@ private SingleReadContext(Builder builder) {
this.bound = builder.bound;
// single use transaction have a single RPC and hence there is no need
// of a channel hint. GAX will automatically choose a hint when used
// with a multiplexed session.
this.channelHint = getChannelHintOptions(session.getOptions(), null);
// with a multiplexed session to perform a round-robin channel selection. We are
// passing a hint here to prefer random channel selection instead of doing GAX round-robin.
this.channelHint =
getChannelHintOptions(
session.getOptions(), ThreadLocalRandom.current().nextLong(Long.MAX_VALUE));
}

@Override
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