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Viewing file:     pipeline.js (10.99 KB)      -rw-r--r--

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const command_1 = require("./command");
const util_1 = require("util");
const standard_as_callback_1 = require("standard-as-callback");
const redis_commands_1 = require("redis-commands");
const cluster_key_slot_1 = require("cluster-key-slot");
const PromiseContainer = require("./promiseContainer");
const commander_1 = require("./commander");
function Pipeline(redis) {
    commander_1.default.call(this);
    this.redis = redis;
    this.isCluster = this.redis.constructor.name === "Cluster";
    this.options = redis.options;
    this._queue = [];
    this._result = [];
    this._transactions = 0;
    this._shaToScript = {};
    Object.keys(redis.scriptsSet).forEach((name) => {
        const script = redis.scriptsSet[name];
        this._shaToScript[script.sha] = script;
        this[name] = redis[name];
        this[name + "Buffer"] = redis[name + "Buffer"];
    });
    const Promise = PromiseContainer.get();
    this.promise = new Promise((resolve, reject) => {
        this.resolve = resolve;
        this.reject = reject;
    });
    const _this = this;
    Object.defineProperty(this, "length", {
        get: function () {
            return _this._queue.length;
        },
    });
}
exports.default = Pipeline;
Object.assign(Pipeline.prototype, commander_1.default.prototype);
Pipeline.prototype.fillResult = function (value, position) {
    if (this._queue[position].name === "exec" && Array.isArray(value[1])) {
        const execLength = value[1].length;
        for (let i = 0; i < execLength; i++) {
            if (value[1][i] instanceof Error) {
                continue;
            }
            const cmd = this._queue[position - (execLength - i)];
            try {
                value[1][i] = cmd.transformReply(value[1][i]);
            }
            catch (err) {
                value[1][i] = err;
            }
        }
    }
    this._result[position] = value;
    if (--this.replyPending) {
        return;
    }
    if (this.isCluster) {
        let retriable = true;
        let commonError;
        for (let i = 0; i < this._result.length; ++i) {
            const error = this._result[i][0];
            const command = this._queue[i];
            if (error) {
                if (command.name === "exec" &&
                    error.message ===
                        "EXECABORT Transaction discarded because of previous errors.") {
                    continue;
                }
                if (!commonError) {
                    commonError = {
                        name: error.name,
                        message: error.message,
                    };
                }
                else if (commonError.name !== error.name ||
                    commonError.message !== error.message) {
                    retriable = false;
                    break;
                }
            }
            else if (!command.inTransaction) {
                const isReadOnly = redis_commands_1.exists(command.name) && redis_commands_1.hasFlag(command.name, "readonly");
                if (!isReadOnly) {
                    retriable = false;
                    break;
                }
            }
        }
        if (commonError && retriable) {
            const _this = this;
            const errv = commonError.message.split(" ");
            const queue = this._queue;
            let inTransaction = false;
            this._queue = [];
            for (let i = 0; i < queue.length; ++i) {
                if (errv[0] === "ASK" &&
                    !inTransaction &&
                    queue[i].name !== "asking" &&
                    (!queue[i - 1] || queue[i - 1].name !== "asking")) {
                    const asking = new command_1.default("asking");
                    asking.ignore = true;
                    this.sendCommand(asking);
                }
                queue[i].initPromise();
                this.sendCommand(queue[i]);
                inTransaction = queue[i].inTransaction;
            }
            let matched = true;
            if (typeof this.leftRedirections === "undefined") {
                this.leftRedirections = {};
            }
            const exec = function () {
                _this.exec();
            };
            this.redis.handleError(commonError, this.leftRedirections, {
                moved: function (slot, key) {
                    _this.preferKey = key;
                    _this.redis.slots[errv[1]] = [key];
                    _this.redis.refreshSlotsCache();
                    _this.exec();
                },
                ask: function (slot, key) {
                    _this.preferKey = key;
                    _this.exec();
                },
                tryagain: exec,
                clusterDown: exec,
                connectionClosed: exec,
                maxRedirections: () => {
                    matched = false;
                },
                defaults: () => {
                    matched = false;
                },
            });
            if (matched) {
                return;
            }
        }
    }
    let ignoredCount = 0;
    for (let i = 0; i < this._queue.length - ignoredCount; ++i) {
        if (this._queue[i + ignoredCount].ignore) {
            ignoredCount += 1;
        }
        this._result[i] = this._result[i + ignoredCount];
    }
    this.resolve(this._result.slice(0, this._result.length - ignoredCount));
};
Pipeline.prototype.sendCommand = function (command) {
    if (this._transactions > 0) {
        command.inTransaction = true;
    }
    const position = this._queue.length;
    command.pipelineIndex = position;
    command.promise
        .then((result) => {
        this.fillResult([null, result], position);
    })
        .catch((error) => {
        this.fillResult([error], position);
    });
    this._queue.push(command);
    return this;
};
Pipeline.prototype.addBatch = function (commands) {
    let command, commandName, args;
    for (let i = 0; i < commands.length; ++i) {
        command = commands[i];
        commandName = command[0];
        args = command.slice(1);
        this[commandName].apply(this, args);
    }
    return this;
};
const multi = Pipeline.prototype.multi;
Pipeline.prototype.multi = function () {
    this._transactions += 1;
    return multi.apply(this, arguments);
};
const execBuffer = Pipeline.prototype.execBuffer;
const exec = Pipeline.prototype.exec;
Pipeline.prototype.execBuffer = util_1.deprecate(function () {
    if (this._transactions > 0) {
        this._transactions -= 1;
    }
    return execBuffer.apply(this, arguments);
}, "Pipeline#execBuffer: Use Pipeline#exec instead");
Pipeline.prototype.exec = function (callback) {
    if (this._transactions > 0) {
        this._transactions -= 1;
        return (this.options.dropBufferSupport ? exec : execBuffer).apply(this, arguments);
    }
    if (!this.nodeifiedPromise) {
        this.nodeifiedPromise = true;
        standard_as_callback_1.default(this.promise, callback);
    }
    if (!this._queue.length) {
        this.resolve([]);
    }
    let pipelineSlot;
    if (this.isCluster) {
        // List of the first key for each command
        const sampleKeys = [];
        for (let i = 0; i < this._queue.length; i++) {
            const keys = this._queue[i].getKeys();
            if (keys.length) {
                sampleKeys.push(keys[0]);
            }
        }
        if (sampleKeys.length) {
            pipelineSlot = cluster_key_slot_1.generateMulti(sampleKeys);
            if (pipelineSlot < 0) {
                this.reject(new Error("All keys in the pipeline should belong to the same slot"));
                return this.promise;
            }
        }
        else {
            // Send the pipeline to a random node
            pipelineSlot = (Math.random() * 16384) | 0;
        }
    }
    // Check whether scripts exists
    const scripts = [];
    const addedScriptHashes = {};
    for (let i = 0; i < this._queue.length; ++i) {
        const item = this._queue[i];
        if (this.isCluster && item.isCustomCommand) {
            this.reject(new Error("Sending custom commands in pipeline is not supported in Cluster mode."));
            return this.promise;
        }
        if (item.name !== "evalsha") {
            continue;
        }
        const script = this._shaToScript[item.args[0]];
        if (!script || addedScriptHashes[script.sha]) {
            continue;
        }
        scripts.push(script);
        addedScriptHashes[script.sha] = true;
    }
    const _this = this;
    if (!scripts.length) {
        return execPipeline();
    }
    return this.redis
        .script("exists", scripts.map(({ sha }) => sha))
        .then(function (results) {
        const pending = [];
        for (let i = 0; i < results.length; ++i) {
            if (!results[i]) {
                pending.push(scripts[i]);
            }
        }
        const Promise = PromiseContainer.get();
        return Promise.all(pending.map(function (script) {
            return _this.redis.script("load", script.lua);
        }));
    })
        .then(execPipeline);
    function execPipeline() {
        let data = "";
        let buffers;
        let writePending = (_this.replyPending = _this._queue.length);
        let node;
        if (_this.isCluster) {
            node = {
                slot: pipelineSlot,
                redis: _this.redis.connectionPool.nodes.all[_this.preferKey],
            };
        }
        let bufferMode = false;
        const stream = {
            write: function (writable) {
                if (writable instanceof Buffer) {
                    bufferMode = true;
                }
                if (bufferMode) {
                    if (!buffers) {
                        buffers = [];
                    }
                    if (typeof data === "string") {
                        buffers.push(Buffer.from(data, "utf8"));
                        data = undefined;
                    }
                    buffers.push(typeof writable === "string"
                        ? Buffer.from(writable, "utf8")
                        : writable);
                }
                else {
                    data += writable;
                }
                if (!--writePending) {
                    let sendData;
                    if (buffers) {
                        sendData = Buffer.concat(buffers);
                    }
                    else {
                        sendData = data;
                    }
                    if (_this.isCluster) {
                        node.redis.stream.write(sendData);
                    }
                    else {
                        _this.redis.stream.write(sendData);
                    }
                    // Reset writePending for resending
                    writePending = _this._queue.length;
                    data = "";
                    buffers = undefined;
                    bufferMode = false;
                }
            },
        };
        for (let i = 0; i < _this._queue.length; ++i) {
            _this.redis.sendCommand(_this._queue[i], stream, node);
        }
        return _this.promise;
    }
};