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const util = require('util');
const _ = require('lodash');
let elasticsearch;
try {
// eslint-disable-next-line import/no-extraneous-dependencies, import/no-unresolved
elasticsearch = require('elasticsearch');
} catch (e) {
elasticsearch = null;
}
let gremlin;
try {
// eslint-disable-next-line import/no-extraneous-dependencies, import/no-unresolved
gremlin = require('gremlin');
} catch (e) {
gremlin = null;
}
let dseDriver;
try {
// eslint-disable-next-line import/no-extraneous-dependencies, import/no-unresolved
dseDriver = require('dse-driver');
} catch (e) {
dseDriver = null;
}
const cql = Promise.promisifyAll(dseDriver || require('cassandra-driver'));
const BaseModel = require('./base_model');
const schemer = require('../validators/schema');
const normalizer = require('../utils/normalizer');
const buildError = require('./apollo_error.js');
const KeyspaceBuilder = require('../builders/keyspace');
const UdtBuilder = require('../builders/udt');
const UdfBuilder = require('../builders/udf');
const UdaBuilder = require('../builders/uda');
const ElassandraBuilder = require('../builders/elassandra');
const JanusGraphBuilder = require('../builders/janusgraph');
const DEFAULT_REPLICATION_FACTOR = 1;
const noop = () => {};
const Apollo = function f(connection, options) {
Iif (!connection) {
throw (buildError('model.validator.invalidconfig', 'Cassandra connection configuration undefined'));
}
options = options || {};
Iif (!options.defaultReplicationStrategy) {
options.defaultReplicationStrategy = {
class: 'SimpleStrategy',
replication_factor: DEFAULT_REPLICATION_FACTOR,
};
}
this._options = options;
this._models = {};
this._keyspace = connection.keyspace;
this._connection = connection;
this._client = null;
this._esclient = null;
this._gremlin_client = null;
};
Apollo.prototype = {
_generate_model(properties) {
const Model = function f(...args) {
BaseModel.apply(this, Array.prototype.slice.call(args));
};
util.inherits(Model, BaseModel);
Object.keys(BaseModel).forEach((key) => {
Model[key] = BaseModel[key];
});
Model._set_properties(properties);
return Model;
},
create_es_client() {
Iif (!elasticsearch) {
throw (new Error('Configured to use elassandra, but elasticsearch module was not found, try npm install elasticsearch'));
}
const contactPoints = this._connection.contactPoints;
const defaultHosts = [];
contactPoints.forEach((host) => {
defaultHosts.push({ host });
});
const esClientConfig = _.defaults({}, this._connection.elasticsearch, {
hosts: defaultHosts,
sniffOnStart: true,
});
this._esclient = new elasticsearch.Client(esClientConfig);
return this._esclient;
},
_assert_es_index(callback) {
const esClient = this.create_es_client();
const indexName = this._keyspace;
const elassandraBuilder = new ElassandraBuilder(esClient);
elassandraBuilder.assert_index(indexName, indexName, callback);
},
create_gremlin_client() {
Iif (!gremlin) {
throw (new Error('Configured to use janus graph server, but gremlin module was not found, try npm install gremlin'));
}
const defaultHosts = this._connection.contactPoints;
const gremlinConfig = _.defaults({}, this._connection.gremlin, {
host: defaultHosts[0],
port: 8182,
storage: {
backend: 'cassandrathrift',
hostname: defaultHosts[0],
port: 9160,
},
index: {
search: {
backend: 'elasticsearch',
hostname: defaultHosts[0],
port: 9200,
},
},
options: {},
});
this._gremlin_client = gremlin.createClient(gremlinConfig.port, gremlinConfig.host, gremlinConfig.options);
this._gremlin_config = gremlinConfig;
return this._gremlin_client;
},
_assert_gremlin_graph(callback) {
const gremlinClient = this.create_gremlin_client();
const gremlinConfig = this._gremlin_config;
const keyspaceName = this._keyspace;
const graphName = `${keyspaceName}_graph`;
const graphBuilder = new JanusGraphBuilder(gremlinClient, gremlinConfig);
graphBuilder.assert_graph(graphName, callback);
},
get_system_client() {
const connection = _.cloneDeep(this._connection);
delete connection.keyspace;
return new cql.Client(connection);
},
get_keyspace_name() {
return this._keyspace;
},
_assert_keyspace(callback) {
const client = this.get_system_client();
const keyspaceName = this._keyspace;
const options = this._options;
const keyspaceBuilder = new KeyspaceBuilder(client);
keyspaceBuilder.get_keyspace(keyspaceName, (err, keyspaceObject) => {
Iif (err) {
callback(err);
return;
}
Iif (!keyspaceObject) {
keyspaceBuilder.create_keyspace(keyspaceName, options.defaultReplicationStrategy, callback);
return;
}
const dbReplication = normalizer.normalize_replication_option(keyspaceObject.replication);
const ormReplication = normalizer.normalize_replication_option(options.defaultReplicationStrategy);
Iif (!_.isEqual(dbReplication, ormReplication)) {
keyspaceBuilder.alter_keyspace(keyspaceName, options.defaultReplicationStrategy, callback);
return;
}
client.shutdown(() => {
callback();
});
});
},
_assert_user_defined_types(callback) {
const client = this._define_connection;
const options = this._options;
const keyspace = this._keyspace;
if (!options.udts) {
callback();
return;
}
const udtBuilder = new UdtBuilder(client);
Promise.mapSeries(Object.keys(options.udts), (udtKey) => new Promise((resolve, reject) => {
const udtCallback = (err) => {
Iif (err) {
reject(err);
return;
}
resolve();
};
udtBuilder.get_udt(udtKey, keyspace, (err, udtObject) => {
Iif (err) {
udtCallback(err);
return;
}
Iif (!udtObject) {
udtBuilder.create_udt(udtKey, options.udts[udtKey], udtCallback);
return;
}
const udtKeys = Object.keys(options.udts[udtKey]);
const udtValues = _.map(_.values(options.udts[udtKey]), normalizer.normalize_user_defined_type);
const fieldNames = udtObject.field_names;
const fieldTypes = _.map(udtObject.field_types, normalizer.normalize_user_defined_type);
Eif (_.difference(udtKeys, fieldNames).length === 0 && _.difference(udtValues, fieldTypes).length === 0) {
udtCallback();
return;
}
throw (new Error(util.format(
'User defined type "%s" already exists but does not match the udt definition. ' +
'Consider altering or droping the type.',
udtKey,
)));
});
}))
.then(() => {
callback();
})
.catch((err) => {
callback(err);
});
},
_assert_user_defined_functions(callback) {
const client = this._define_connection;
const options = this._options;
const keyspace = this._keyspace;
if (!options.udfs) {
callback();
return;
}
const udfBuilder = new UdfBuilder(client);
Promise.mapSeries(Object.keys(options.udfs), (udfKey) => new Promise((resolve, reject) => {
const udfCallback = (err) => {
Iif (err) {
reject(err);
return;
}
resolve();
};
udfBuilder.validate_definition(udfKey, options.udfs[udfKey]);
udfBuilder.get_udf(udfKey, keyspace, (err, udfObject) => {
Iif (err) {
udfCallback(err);
return;
}
Iif (!udfObject) {
udfBuilder.create_udf(udfKey, options.udfs[udfKey], udfCallback);
return;
}
const udfLanguage = options.udfs[udfKey].language;
const resultLanguage = udfObject.language;
const udfCode = options.udfs[udfKey].code;
const resultCode = udfObject.body;
const udfReturnType = normalizer.normalize_user_defined_type(options.udfs[udfKey].returnType);
const resultReturnType = normalizer.normalize_user_defined_type(udfObject.return_type);
const udfInputs = options.udfs[udfKey].inputs ? options.udfs[udfKey].inputs : {};
const udfInputKeys = Object.keys(udfInputs);
const udfInputValues = _.map(_.values(udfInputs), normalizer.normalize_user_defined_type);
const resultArgumentNames = udfObject.argument_names;
const resultArgumentTypes = _.map(udfObject.argument_types, normalizer.normalize_user_defined_type);
Eif (udfLanguage === resultLanguage &&
udfCode === resultCode &&
udfReturnType === resultReturnType &&
_.isEqual(udfInputKeys, resultArgumentNames) &&
_.isEqual(udfInputValues, resultArgumentTypes)) {
udfCallback();
return;
}
udfBuilder.create_udf(udfKey, options.udfs[udfKey], udfCallback);
});
}))
.then(() => {
callback();
})
.catch((err) => {
callback(err);
});
},
_assert_user_defined_aggregates(callback) {
const client = this._define_connection;
const options = this._options;
const keyspace = this._keyspace;
if (!options.udas) {
callback();
return;
}
const udaBuilder = new UdaBuilder(client);
Promise.mapSeries(Object.keys(options.udas), (udaKey) => new Promise((resolve, reject) => {
const udaCallback = (err) => {
Iif (err) {
reject(err);
return;
}
resolve();
};
udaBuilder.validate_definition(udaKey, options.udas[udaKey]);
if (!options.udas[udaKey].initcond) {
options.udas[udaKey].initcond = null;
}
udaBuilder.get_uda(udaKey, keyspace, (err, udaObjects) => {
Iif (err) {
udaCallback(err);
return;
}
Iif (!udaObjects) {
udaBuilder.create_uda(udaKey, options.udas[udaKey], udaCallback);
return;
}
const inputTypes = _.map(options.udas[udaKey].input_types, normalizer.normalize_user_defined_type);
const sfunc = options.udas[udaKey].sfunc.toLowerCase();
const stype = normalizer.normalize_user_defined_type(options.udas[udaKey].stype);
const finalfunc = options.udas[udaKey].finalfunc ? options.udas[udaKey].finalfunc.toLowerCase() : null;
const initcond = options.udas[udaKey].initcond ? options.udas[udaKey].initcond.replace(/[\s]/g, '') : null;
for (let i = 0; i < udaObjects.length; i++) {
const resultArgumentTypes = _.map(udaObjects[i].argument_types, normalizer.normalize_user_defined_type);
const resultStateFunc = udaObjects[i].state_func;
const resultStateType = normalizer.normalize_user_defined_type(udaObjects[i].state_type);
const resultFinalFunc = udaObjects[i].final_func;
const resultInitcond = udaObjects[i].initcond ? udaObjects[i].initcond.replace(/[\s]/g, '') : null;
Eif (sfunc === resultStateFunc &&
stype === resultStateType &&
finalfunc === resultFinalFunc &&
initcond === resultInitcond &&
_.isEqual(inputTypes, resultArgumentTypes)) {
udaCallback();
return;
}
}
udaBuilder.create_uda(udaKey, options.udas[udaKey], udaCallback);
});
}))
.then(() => {
callback();
})
.catch((err) => {
callback(err);
});
},
_set_client(client) {
const defineConnectionOptions = _.cloneDeep(this._connection);
this._client = client;
this._define_connection = new cql.Client(defineConnectionOptions);
// Reset connections on all models
Object.keys(this._models).forEach((i) => {
this._models[i]._properties.cql = this._client;
this._models[i]._properties.define_connection = this._define_connection;
});
},
init(callback) {
const onUserDefinedAggregates = (err) => {
Iif (err) {
callback(err);
return;
}
const managementTasks = [];
if (this._keyspace && this._options.manageESIndex) {
this.assertESIndexAsync = Promise.promisify(this._assert_es_index);
managementTasks.push(this.assertESIndexAsync());
}
if (this._keyspace && this._options.manageGraphs) {
this.assertGremlinGraphAsync = Promise.promisify(this._assert_gremlin_graph);
managementTasks.push(this.assertGremlinGraphAsync());
}
Promise.all(managementTasks)
.then(() => {
callback(null, this);
})
.catch((err1) => {
callback(err1);
});
};
const onUserDefinedFunctions = function f(err) {
Iif (err) {
callback(err);
return;
}
try {
this._assert_user_defined_aggregates(onUserDefinedAggregates.bind(this));
} catch (e) {
throw (buildError('model.validator.invaliduda', e.message));
}
};
const onUserDefinedTypes = function f(err) {
Iif (err) {
callback(err);
return;
}
try {
this._assert_user_defined_functions(onUserDefinedFunctions.bind(this));
} catch (e) {
throw (buildError('model.validator.invalidudf', e.message));
}
};
const onKeyspace = function f(err) {
Iif (err) {
callback(err);
return;
}
this._set_client(new cql.Client(this._connection));
try {
this._assert_user_defined_types(onUserDefinedTypes.bind(this));
} catch (e) {
throw (buildError('model.validator.invalidudt', e.message));
}
};
if (this._keyspace && this._options.createKeyspace !== false) {
this._assert_keyspace(onKeyspace.bind(this));
} else {
onKeyspace.call(this);
}
},
addModel(modelName, modelSchema) {
Iif (!modelName || typeof (modelName) !== 'string') {
throw (buildError('model.validator.invalidschema', 'Model name must be a valid string'));
}
try {
schemer.validate_model_schema(modelSchema);
} catch (e) {
throw (buildError('model.validator.invalidschema', e.message));
}
if (modelSchema.options && modelSchema.options.timestamps) {
const timestampOptions = {
createdAt: modelSchema.options.timestamps.createdAt || 'createdAt',
updatedAt: modelSchema.options.timestamps.updatedAt || 'updatedAt',
};
modelSchema.options.timestamps = timestampOptions;
modelSchema.fields[modelSchema.options.timestamps.createdAt] = {
type: 'timestamp',
default: {
$db_function: 'toTimestamp(now())',
},
};
modelSchema.fields[modelSchema.options.timestamps.updatedAt] = {
type: 'timestamp',
default: {
$db_function: 'toTimestamp(now())',
},
};
}
if (modelSchema.options && modelSchema.options.versions) {
const versionOptions = {
key: modelSchema.options.versions.key || '__v',
};
modelSchema.options.versions = versionOptions;
modelSchema.fields[modelSchema.options.versions.key] = {
type: 'timeuuid',
default: {
$db_function: 'now()',
},
};
}
const baseProperties = {
name: modelName,
schema: modelSchema,
keyspace: this._keyspace,
define_connection: this._define_connection,
cql: this._client,
esclient: this._esclient,
gremlin_client: this._gremlin_client,
get_constructor: this.getModel.bind(this, modelName),
init: this.init.bind(this),
dropTableOnSchemaChange: this._options.dropTableOnSchemaChange,
createTable: this._options.createTable,
migration: this._options.migration,
disableTTYConfirmation: this._options.disableTTYConfirmation,
};
this._models[modelName] = this._generate_model(baseProperties);
return this._models[modelName];
},
getModel(modelName) {
return this._models[modelName] || null;
},
close(callback) {
callback = callback || noop;
if (this.orm._esclient) {
this.orm._esclient.close();
}
if (this.orm._gremlin_client && this.orm._gremlin_client.connection && this.orm._gremlin_client.connection.ws) {
this.orm._gremlin_client.connection.ws.close();
}
const clientsToShutdown = [];
Eif (this.orm._client) {
clientsToShutdown.push(this.orm._client.shutdown());
}
Eif (this.orm._define_connection) {
clientsToShutdown.push(this.orm._define_connection.shutdown());
}
Promise.all(clientsToShutdown)
.then(() => {
callback();
})
.catch((err) => {
callback(err);
});
},
};
module.exports = Apollo;
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