prosody
a661292d074a
net/resolvers/chain.lua

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net/resolvers/chain.lua @ 12647:a661292d074a

util.roles: Add new utility module to consolidate role objects and methods
author Matthew Wild <mwild1@gmail.com>
date Tue, 19 Jul 2022 17:44:26 +0100
parent 12204:7c397a49d163
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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12204
7c397a49d163 net.resolvers.chain: A resolver for combining other resolvers
Kim Alvefur <zash@zash.se>
parents:
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1
7c397a49d163 net.resolvers.chain: A resolver for combining other resolvers
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2 local methods = {};
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3 local resolver_mt = { __index = methods };
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4
7c397a49d163 net.resolvers.chain: A resolver for combining other resolvers
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5 -- Find the next target to connect to, and
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6 -- pass it to cb()
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7 function methods:next(cb)
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8 if self.resolvers then
7c397a49d163 net.resolvers.chain: A resolver for combining other resolvers
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9 if not self.resolver then
7c397a49d163 net.resolvers.chain: A resolver for combining other resolvers
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10 if #self.resolvers == 0 then
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11 cb(nil);
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12 return;
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13 end
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14 local next_resolver = table.remove(self.resolvers, 1);
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15 self.resolver = next_resolver;
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16 end
7c397a49d163 net.resolvers.chain: A resolver for combining other resolvers
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17 self.resolver:next(function (...)
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18 if self.resolver then
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19 self.last_error = self.resolver.last_error;
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20 end
7c397a49d163 net.resolvers.chain: A resolver for combining other resolvers
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21 if ... == nil then
7c397a49d163 net.resolvers.chain: A resolver for combining other resolvers
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22 self.resolver = nil;
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23 self:next(cb);
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24 else
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25 cb(...);
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26 end
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27 end);
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28 return;
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29 end
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30 end
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31
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32 local function new(resolvers)
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33 return setmetatable({ resolvers = resolvers }, resolver_mt);
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34 end
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35
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36 return {
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37 new = new;
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38 };