53c405c699
Summary: This diff changes the RPC layer to directly return `TResponse` to the user when issuing a `Call<...>` RPC call. The call throws an exception on failure (instead of the previous return `nullopt`). All servers (network, RPC and distributed) are set to have explicit `Shutdown` methods so that a controlled shutdown can always be performed. The object destructors now have `CHECK`s to enforce that the `AwaitShutdown` methods were called. The distributed memgraph is changed that none of the binaries (master/workers) crash when there is a communication failure. Instead, the whole cluster starts a graceful shutdown when a persistent communication error is detected. Transient errors are allowed during execution. The transaction that errored out will be aborted on the whole cluster. The cluster state is managed using a new Heartbeat RPC call. Reviewers: buda, teon.banek, msantl Reviewed By: teon.banek Subscribers: pullbot Differential Revision: https://phabricator.memgraph.io/D1604
30 lines
841 B
C++
30 lines
841 B
C++
#pragma once
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#include "distributed/coordination.hpp"
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#include "distributed/plan_rpc_messages.hpp"
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#include "query/frontend/semantic/symbol_table.hpp"
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#include "query/plan/operator.hpp"
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namespace distributed {
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/** Handles plan dispatching to all workers. Uses MasterCoordination to
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* acomplish that. Master side.
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*/
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class PlanDispatcher {
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public:
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explicit PlanDispatcher(Coordination *coordination);
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/** Dispatch a plan to all workers and wait for their acknowledgement. */
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void DispatchPlan(int64_t plan_id,
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std::shared_ptr<query::plan::LogicalOperator> plan,
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const query::SymbolTable &symbol_table);
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/** Remove a plan from all workers and wait for their acknowledgement. */
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void RemovePlan(int64_t plan_id);
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private:
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Coordination *coordination_;
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};
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} // namespace distributed
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