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index.js
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index.js
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//process.on( "warning", (warning)=>{console.trace( "WARNING:", warning ); } );
//process.on( "error", (warning)=>{console.trace( "ERROR PROCESS:", warning ); } );
//process.on( "exit", (warning)=>{console.trace( "EXIT:", warning ); } );
const Gun = require('gun/gun');
var _debug_counter = 0;
var __debug_counter = 0;
var _debug_tick = Date.now();
const _debug = false;
const rel_ = Gun.val.rel._; // '#'
const val_ = Gun._.field; // '.'
const node_ = Gun.node._; // '_'
const state_ = Gun.state._; // '>';
var qb;
const ACK_ = '@';
const SEQ_ = '#';
Gun.on('opt', function(ctx) {
var goNext = function(){
this.to.next(ctx);
if (ctx.once) {
return;
}
}.bind(this);
// DB options
var opt = ctx.opt.db || (ctx.opt.db = {});
//opt.file = opt.file || ('file:gun.db?nolock=1');
opt.contactPoints = opt.contactPoints || ['127.0.0.1'];
opt.table = opt.table || 'gun_data';
opt.keyspace = opt.keyspace || 'gun_db';
opt.ttl = opt.ttl || 0;
const drop = opt.drop || false;
const qpath = opt.keyspace + "." + opt.table;
const qb = require("cassanknex")({
// debug: _debug || false,
connection: {
contactPoints: opt.contactPoints
}
});
qb.on("ready", function(err) {
if (err)
console.error("Error Connecting to Cassandra Cluster", err);
else
console.log("Cassandra Cluster connected!");
var dropKeyspace = function(){
qb()
.dropKeyspaceIfExists(opt.keyspace)
.exec(function(err, res) {
if (err) {
console.log(err);
}
createKeyspace();
});
}
var createIndex = function(){
qb(opt.keyspace)
.createIndex(opt.table, "soul_index", "soul")
.createIndex(opt.table, "field_index", "field")
.createIndex(opt.table, "rel_index", "relation")
.exec(function(err, res) {
if (err) {
console.log(err);
}
});
}
var createTable = function(){
qb(opt.keyspace)
.createColumnFamilyIfNotExists(opt.table)
.text("soul")
.text("field")
.text("value")
.text("relation")
.bigint("state")
.primary(["soul", "field"])
.exec(function(err, res) {
if (err) {
console.log(err);
return;
} else {
console.log("Gun-Cassandra Tables Ready!");
goGun();
}
});
}
var createKeyspace = function(){
// prepare keyspace & tables
qb()
.createKeyspaceIfNotExists(opt.keyspace)
.withSimpleStrategy(1)
.exec(function(err, res) {
if (err) {
console.log(err);
return;
}
createTable();
});
}
if (drop){
console.log('DROP',opt.keyspace);
dropKeyspace();
} else {
createKeyspace();
}
});
var goGun = function(){
goNext();
var skip_put = null;
var query;
var gun = ctx.gun;
ctx.on('put', function(at) {
this.to.next(at);
if (skip_put && skip_put == at[ACK_]) {
if (_debug) {
var now = Date.now();
if (now - _debug_tick > 1000) {
_debug && console.log("N in M", _debug_counter - __debug_counter, now - _debug_tick, (_debug_counter - __debug_counter) / (now - _debug_tick));
_debug_tick = now;
__debug_counter = _debug_counter;
}
_debug_counter++;
_debug && console.log(new Date(), "skipping put in-get:", _debug_counter, " get putting:", skip_put, at[ACK_], JSON.stringify(at.put));
}
return;
}
_debug && console.log( new Date(), "PUT", at[SEQ_], at[ACK_], JSON.stringify( at.put ) );
Gun.graph.is(at.put, null, function(value, field, node, soul) {
var id;
// kinda hate to always do a select just to see that the new update is newer than what was there.
qb(opt.keyspace)
.select('state')
.from(opt.table)
.where('soul', '=', soul)
.andWhere('field', '=', field)
.exec(function(err, record) {
_debug && console.log('STATE SELECT!',soul,field,record.rows[0]);
var dataRelation, dataValue, tmp;
var state = Gun.state.is(node, field);
// Check to see if what we have on disk is more recent.
if (record && record.rowLength > 0 && state <= record.rows[0].state) {
_debug && console.log( new Date(), "already newer in database.." );
ctx.on('in', {
[ACK_]: at[rel_],
ok: 1
});
return;
}
if (value && (tmp = value[rel_])) { // TODO: Don't hardcode.
dataRelation = tmp;
dataValue = "";
} else if (value) {
dataRelation = "";
dataValue = value;
} else {
dataRelation = "";
dataValue = "";
}
try {
var values = {
soul: soul,
field: field,
value: dataValue,
relation: dataRelation,
state: state
};
// _debug && console.log( new Date(), "INSERT values:", values );
qb(opt.keyspace)
.insert(values)
.into(opt.table)
.usingTTL(opt.ttl)
.exec(function(err, result) {
if(err) { console.log(err); return }
});
ctx.on('in', {
[ACK_]: at[rel_],
ok: 1
});
} catch (e) {
_debug && console.log( new Date(), "error inserting:",e);
ctx.on('in', {
[ACK_]: at[rel_],
err: e
});
}
});
});
});
_debug && console.log( new Date(), " : Put done" );
ctx.on('get', function(at) {
this.to.next(at);
if (!qb) {
console.log("Lost the database somehow");
return;
}
var lex = at.get,
u;
if (!lex) {
return;
}
var soul = lex[SEQ_];
var field = lex[val_];
_debug && console.log('LEX',lex);
_debug && console.log( new Date(), "doing get...for soul:", soul, "field:",field );
if (node_ === field) {
if (!qb) return;
qb(opt.keyspace)
.select()
.from(opt.table)
.where("soul", "=", soul)
.limit(1)
.exec(function(err, record) {
if (err) {
console.log('FAILED SELECT:', err);
}
_debug && console.log( new Date(), "select result:", record );
if (!record || !record.rowLength == 0 || err) {
_debug && console.log( "So, result with an in?" );
return ctx.on('in', {
[ACK_]: at[SEQ_]
});
}
_debug && console.log( new Date(), "give back empty" );
return ctx.on('in', {
[ACK_]: at[SEQ_],
put: {
[soul]: {
[node_]: {
[rel_]: soul,
[state_]: {}
}
}
}
});
});
}
if (field) {
qb(opt.keyspace)
.select()
.from(opt.table)
.where("soul", "=", soul)
.andWhere("field", "=", field)
.exec(function(err, record) {
if (record && record.rowLength > 0) {
var tmp = record.rows[0];
let rec = { soul: tmp.soul, field: tmp.field, relation: tmp.relation, state: parseInt(tmp.state), value: tmp.value };
_debug && console.log( new Date(), "Specific field?", rec );
var msg;
if (rec.relation)
msg = {
[rec.soul]: {
[node_]: {
[rel_]: rec.soul,
[state_]: {
[rec.field]: rec.state
}
},
[rec.field]: {
[rel_]: rec.relation
}
}
};
else if (rec.value)
msg = {
[rec.soul]: {
[node_]: {
[rel_]: rec.soul,
[state_]: {
[rec.field]: rec.state
}
},
[rec.field]: rec.value
}
};
else
msg = {
[rec.soul]: {
[node_]: {
[rel_]: rec.soul,
[state_]: {
[rec.field]: rec.state
}
},
[rec.field]: null
}
};
skip_put = at[SEQ_];
_debug && console.log(new Date(), "PUT", msg);
ctx.on('in', {
[ACK_]: at[SEQ_],
put: msg
});
skip_put = null;
}
return;
});
}
_debug && console.log( new Date(), "select all fields...", soul );
qb(opt.keyspace)
.select()
.from(opt.table)
.where("soul", "=", soul)
.exec(function(err, record) {
if (!record || record.rowLength == 0) {
_debug && console.log( new Date(), "nothing... So, result with an in?" );
ctx.on('in', {
[ACK_]: at[SEQ_]
});
} else {
_debug && console.log( new Date(), "got result",record.rows[0] );
if (record.rowLength > 0) {
var state, node;
var rec = {
[soul]: {
[node_]: {
[rel_]: soul,
[state_]: {}
}
}
};
node = rec[soul];
state = node[node_][state_];
record.rows.forEach(function(record) {
_debug && console.log('Parsing ROW:',record);
state[record.field] = parseInt(record.state);
if (record.relation)
node[record.field] = {
[rel_]: record.relation
};
else if (record.value)
node[record.field] = record.value;
else
node[record.field] = null;
});
_debug && console.log( new Date(), "Node is now ------------\n", JSON.stringify(rec) );
skip_put = at[SEQ_];
_debug && console.log( new Date(), "put to gun" );
ctx.on('in', {
ACK_: at[SEQ_],
put: rec
});
skip_put = null;
} else record.rows.forEach(function(record) {
var msg;
if (record.relation)
msg = {
[soul]: {
[node_]: {
[rel_]: record.soul,
[state_]: {
[record.field]: parseInt(record.state)
}
},
[record.field]: {
[rel_]: record.relation
}
}
};
else if (record.value)
msg = {
[soul]: {
[node_]: {
[rel_]: record.soul,
[state_]: {
[record.field]: parseInt(record.state)
}
},
[record.field]: record.value
}
};
else
msg = {
[soul]: {
[node_]: {
[rel_]: record.soul,
[state_]: {
[record.field]: parseInt(record.state)
}
},
[record.field]: null
}
};
_debug && console.log( "State is:", typeof( record.state ) );
_debug && console.log( new Date(), " From Nodify", JSON.stringify(msg) );
skip_put = at[SEQ_];
_debug && console.log( new Date(), "put to gun" );
result = ctx.on('in', {
[ACK_]: at[SEQ_],
put: msg
});
skip_put = null;
});
_debug && console.log( new Date(), "put into gun done" );
}
});
});
}
});