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26 lines
1.1 KiB
Erlang
26 lines
1.1 KiB
Erlang
-module(riak_kv_worker_intercepts).
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-compile(export_all).
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-include("intercept.hrl").
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-define(M, riak_kv_worker_orig).
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%
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% Okay, this is an interesting intercept. The intention here is to insert some
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% code into the point where the vnode has completed its fold, but before it invokes the finish
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% command, which will inform the riak_core_vnode that handoff has completed for this node.
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% This is a magic time, when handoff is running, and the fold has completed.
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% In this case, we send a message to a process that is running in riak test
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% (see verify_handoff_write_once, for an example), which will do a write during this
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% magic time. We wait for said process to return us an ok.
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%
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% The objective is to force the vnode to trigger a handle_handoff_command,
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% thus exercising the runtime/forwarding handoff logic in the vnode.
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%
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handle_work_intercept({fold, FoldFun, FinishFun}, Sender, State) ->
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FinishWrapperFun = fun(X) ->
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catch global:send(start_fold_started_proc, {write, self()}),
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receive
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ok -> ok
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end,
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FinishFun(X)
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end,
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?M:handle_work_orig({fold, FoldFun, FinishWrapperFun}, Sender, State). |