Redux-Cluster

Synchronize your redux storage in a cluster.

• Supports native methods of redux.
• Uses IPC only (in Basic Scheme) or IPC and Socket (in Cluster Scheme).
• Store are isolated and identified by means of hashes.

Install

    npm i redux-cluster --save

Use

Подробное описание RU

Connection library

    var ReduxCluster = require('redux-cluster');

Create store

    var Test = ReduxCluster.createStore(editProcessStorage);
    
    function editProcessStorage(state = {version:''}, action){ 
        switch (action.type){
            case 'TASK':
                var state_new = {};
                state_new.version = action.payload.version;
                return state_new;
                break;
            default:
                break;
        }
    }

Subscribe updates

    Test.subscribe(function(){
        if(Cluster.isMaster){
            var name = 'm';
        } else {
            var name = Cluster.worker.id;
        }
        console.log(Colors.gray(name + ' | ' + JSON.stringify(Test.getState())));
    });

Dispatch event

    Test.dispatch({type:'TASK', payload: {version:'1111111'}})

Error output callback

Default is console.error

    Test.stderr = function(err){console.error(err);}

Synchronization mode

This mode is enabled for the basic scheme as well.
Set the type of synchronization, the default action.

• action - send a action of the store status for each action and send a snapshot every 1000 (default, Test.resync) action
• snapshot - send a snapshot of the store status for each action

Test.mode = "action";

Snapshot synchronization frequency (for action mode)

Number of actions before a snapshot of guaranteed synchronization will be sent. Default 1000 actions.

Test.resync = 1000;

Create socket server

Please familiarize yourself with the architectural schemes before use. In Windows createServer is not supported in child process (named channel write is not supported in the child process), please use as TCP-server.

Test.createServer(<Options>);

Example

var Test = ReduxCluster.createStore(reducer);
Test.createServer({path: "./mysock.sock", logins:{test1:'12345'}});
var Test2 = ReduxCluster.createStore(reducer2);
Test2.createServer({host: "0.0.0.0", port: 8888, logins:{test2:'123456'}});

Options Required:

• path - name of the file socket (linux) or the name of the named channel (windows), if use as IPC
• host - hostname or ip-address (optional, default 0.0.0.0), if use as TCP
• port - port (optional, default 10001), if use as TCP
• logins - login - password pairs as {login1:password1, login2:password2}.

Create socket client

Test.createClient(<Options>);

Example

var Test = ReduxCluster.createStore(reducer);
Test.createClient({path: "./mysock.sock", login:"test1", password:'12345'});
var Test2 = ReduxCluster.createStore(reducer2);
Test2.createClient({host: "localhost", port: 8888, login:"test2", password:'123456'});

Options Required:

• path - name of the file socket (linux, file will be overwritten!) or the name of the named channel (windows), if use as IPC
• host - hostname or ip-address (optional, default 0.0.0.0), if use as TCP
• port - port (optional, default 10001), if use as TCP
• login - login in socket
• password - password in socket

Connection status

return true if connected, false if disconnected

Test.connected;

Connection role

return role:

• master (if Master process in Cluster, sends and listen action to Worker)
• worker (if Worker process in Cluster, processes and sends action to Master)
• server (if use createServer(<Object>), sends and listen action to Client)
• client (if use createClient(<Object>), processes and sends action to Server)

Test.role;

Want to use a web socket? Connect the redux-cluster-ws library

Install

    npm i redux-cluster-ws --save

Add websocket server wrapper and use

require('redux-cluster-ws').server(Test);
Test.createWSServer(<Options>);

Example

require('redux-cluster-ws').server(Test);
Test.createWSServer({
    host: "0.0.0.0", 
    port: 8888, 
    logins:{
        test2:'123456'
    }, 
    ssl:{
        key: /path/to/certificate-key,
        crt: /path/to/certificate,
        ca:	/path/to/certificate-ca
    }
});

require('redux-cluster-ws').server(Test2);
Test2.createWSServer({
    host: "localhost", 
    port: 8889, 
    logins:{
        test2:'123456'
    }
});

Options Required:

• host - hostname or ip-address
• port - port (optional, default 10002)
• logins - login - password pairs as {login1:password1, login2:password2}.
• ssl - path to server certificate (if use as https, default use http).

Add websocket client library

Client does not use internal Node libraries for webpack compatibility. Therefore, on the client, you must create a store with the same reducer.

//create Redux Store
var ReduxClusterWS = require('redux-cluster-ws').client;
var Test = ReduxClusterWS.createStore(<Reducer>);

//connect to Redux-Cluster server (use socket.io)
Test.createWSClient(<Options>);

Example

var Test = ReduxCluster.createStore(reducer);
Test.createWSClient({host: "https://localhost", port: 8888, login:"test2", password:'123456'});

Options Required:

• host - hostname or ip-address (protocol include)
• port - port (optional, default 10002)
• login - login in websocket
• password - password in websocket

Save storage to disk and boot at startup

Save storage to disk and boot at startup. It is recommended to perform these actions only in the primary server / master, since they create a load on the file system.
Attention! For Worker and Master, you must specify different paths. Return Promise object.

  Test.backup(<Object>);

Example

Test.backup({
    path:'./test.backup', 
    key:"password-for-encrypter", 
    count:1000
}).catch(function(err){
    ... you handler
});

Options Required:

• path - file system path for backup (Attention! File will be overwritten!)
• key - encryption key (can be omitted)
• timeout - backup timeout (time in seconds for which data can be lost), if count is omitted.
• count - amount of action you can lose

Architectural schemes

Basic Scheme

Cluster Scheme

You can use createServer(<Object>) in any process in cluster (and outside cluster process).
Using createClient(<Object>) is logical in a Master process or a single process. In any case, if you create a createClient(<Object>) in the Worker process, it will not work with the rest of the cluster processes, does not have access to them. So you will have to create createClient(<Object>) in each Worker process that needs access to the Store.

Server Scheme in Socket

Client (Cluster) Scheme in Socket

Client (Worker) Scheme in Socket

This is a bad way, it will lead to breaks in the interaction of the ReduxCluster with the Master process.

Client (Single Process) Scheme in Socket

Example

Basic Scheme

var ReduxCluster = require('redux-cluster'),
    Cluster = require('cluster'),
    Lodash = require('lodash');
    
var Test = ReduxCluster.createStore(editProcessStorage);
    
function editProcessStorage(state = {version:''}, action){ 
    try {
        switch (action.type){
            case 'TASK':
                var state_new = Lodash.clone(state);
                state_new.version = action.payload.version;
                return state_new;
                break;
            default:
                break;
        }
    } catch(e){
    }
    var state_new = Lodash.clone(state);
    return state_new;
}

Test.subscribe(function(){
    if(Cluster.isMaster){
        var name = 'm';
    } else {
        var name = Cluster.worker.id;
    }
    console.log(name + ' | ' + JSON.stringify(Test.getState()));
});

if(Cluster.isMaster){
    for(var i=0; i < 3; i++){
        setTimeout(function(){Cluster.fork();}, i*10000)
    }
    Test.dispatch({type:'TASK', payload: {version:'MasterTest'}});
} else {
    Test.dispatch({type:'TASK', payload: {version:'WorkerTest'+Cluster.worker.id}});
}

Cluster Scheme Server

var ReduxCluster = require('redux-cluster'),
    Cluster = require('cluster'),
    Lodash = require('lodash');
    
var Test = ReduxCluster.createStore(editProcessStorage);

if(Cluster.isMaster){
    Test.createServer({path: "./mysock.sock", logins:{test1:'12345'}});
}
    
function editProcessStorage(state = {version:''}, action){ 
    try {
        switch (action.type){
            case 'TASK':
                var state_new = Lodash.clone(state);
                state_new.version = action.payload.version;
                return state_new;
                break;
            default:
                break;
        }
    } catch(e){
    }
    var state_new = Lodash.clone(state);
    return state_new;
}

Test.subscribe(function(){
    if(Cluster.isMaster){
        var name = 'm';
    } else {
        var name = Cluster.worker.id;
    }
    console.log(' S1 | ' + name + ' | ' + JSON.stringify(Test.getState()));
});

if(Cluster.isMaster){
    for(var i=0; i < 1; i++){
        setTimeout(function(){Cluster.fork();}, i*10000);
    }
    var i = 0;
    setInterval(function(){
        Test.dispatch({type:'TASK', payload: {version:'MasterTest'+i}});
        i++;
    }, 19000);
} else {
    var i = 0;
    setInterval(function(){
        Test.dispatch({type:'TASK', payload: {version:'WorkerTest'+i}});
        i++;
    }, 31000+(Cluster.worker.id*3600), i);
}

Cluster Scheme Client

var ReduxCluster = require('redux-cluster'),
    Cluster = require('cluster'),
    Lodash = require('lodash');
    
var Test = ReduxCluster.createStore(editProcessStorage);

if(Cluster.isMaster){
    Test.createClient({path: "./mysock.sock", login:"test1", password:'12345'});
}
    
function editProcessStorage(state = {version:''}, action){ 
    try {
        switch (action.type){
            case 'TASK':
                var state_new = Lodash.clone(state);
                state_new.version = action.payload.version;
                return state_new;
                break;
            default:
                break;
        }
    } catch(e){
    }
    var state_new = Lodash.clone(state);
    return state_new;
}

Test.subscribe(function(){
    if(Cluster.isMaster){
        var name = 'm';
    } else {
        var name = Cluster.worker.id;
    }
    console.log(name + ' | ' + JSON.stringify(Test.getState()));
});

if(Cluster.isMaster){
    for(var i=0; i < 2; i++){
        setTimeout(function(){Cluster.fork();}, i*8000);
    }
    var i = 0;
    setInterval(function(){
        Test.dispatch({type:'TASK', payload: {version:'OneRemoteMasterTest'+i}});
        i++;
    }, 11000);
} else {
    var i = 0;
    setInterval(function(){
        Test.dispatch({type:'TASK', payload: {version:'OneRemoteWorkerTest'+i}});
        i++;
    }, 22000+(Cluster.worker.id*1500), i);
}

Warning

Encryption (crypto.createCipheriv) and Decryption (crypto.createDecipheriv) features have been marked as deprecated in Node v12. I updated these functions in version 1.7.0, but if you used a backup of the storage to disk, you will not be able to download it.

LICENSE

MIT