hamok/lib/raft/RaftEmptyState.js

Lightweight Distributed Object Storage on RAFT consensus algorithm

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.createRaftEmptyState = createRaftEmptyState;
const logger_1 = require("../common/logger");
const logger = (0, logger_1.createLogger)('RaftEmptyState');
function createRaftEmptyState(context) {
    logger.trace('Creating RaftEmptyState');
    const { raftEngine } = context;
    const messageEmitter = raftEngine.transport;
    let closed = false;
    const appendEntriesRequestListener = (request) => {
        logger.trace('%s received an append entries request from %s, but it is in an empty state. request: %o', raftEngine.localPeerId, request.leaderId, request);
    };
    const appendEntriesResponseListener = (response) => {
        logger.warn('%s received an append entries response from %s, but it is in an empty state. response: %o', raftEngine.localPeerId, response.sourcePeerId, response);
    };
    const voteRequestListener = (request) => {
        logger.warn('%s received a vote request from %s, but it is in an empty state. request: %o', raftEngine.localPeerId, request.candidateId, request);
    };
    const voteResponseListener = (response) => {
        logger.warn('%s received a vote response from %s, but it is in an empty state. response: %o', raftEngine.localPeerId, response.sourcePeerId, response);
    };
    const close = () => {
        if (closed)
            return;
        closed = true;
        messageEmitter.off('RaftVoteRequest', voteRequestListener);
        messageEmitter.off('RaftVoteResponse', voteResponseListener);
        messageEmitter.off('RaftAppendEntriesRequestChunk', appendEntriesRequestListener);
        messageEmitter.off('RaftAppendEntriesResponse', appendEntriesResponseListener);
        logger.debug('%s closed', raftEngine.localPeerId);
    };
    messageEmitter.on('RaftVoteRequest', voteRequestListener);
    messageEmitter.on('RaftVoteResponse', voteResponseListener);
    messageEmitter.on('RaftAppendEntriesRequestChunk', appendEntriesRequestListener);
    messageEmitter.on('RaftAppendEntriesResponse', appendEntriesResponseListener);
    const run = () => {
    };
    const init = () => {
        raftEngine.leaderId = undefined;
    };
    return {
        stateName: 'empty',
        run,
        close,
        init,
    };
}