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Aravind142857
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node_modules/cassandra-driver/lib/metadata/data-collection.js
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node_modules/cassandra-driver/lib/metadata/data-collection.js
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/*
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* Copyright DataStax, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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const util = require('util');
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const events = require('events');
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/**
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* Creates a new instance of DataCollection
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* @param {String} name Name of the data object.
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* @classdesc Describes a table or a view
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* @alias module:metadata~DataCollection
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* @constructor
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* @abstract
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*/
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function DataCollection(name) {
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events.EventEmitter.call(this);
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this.setMaxListeners(0);
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//private
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Object.defineProperty(this, 'loading', { value: false, enumerable: false, writable: true });
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Object.defineProperty(this, 'loaded', { value: false, enumerable: false, writable: true });
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/**
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* Name of the object
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* @type {String}
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*/
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this.name = name;
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/**
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* False-positive probability for SSTable Bloom filters.
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* @type {number}
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*/
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this.bloomFilterFalsePositiveChance = 0;
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/**
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* Level of caching: all, keys_only, rows_only, none
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* @type {String}
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*/
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this.caching = null;
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/**
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* A human readable comment describing the table.
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* @type {String}
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*/
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this.comment = null;
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/**
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* Specifies the time to wait before garbage collecting tombstones (deletion markers)
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* @type {number}
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*/
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this.gcGraceSeconds = 0;
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/**
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* Compaction strategy class used for the table.
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* @type {String}
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*/
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this.compactionClass = null;
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/**
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* Associative-array containing the compaction options keys and values.
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* @type {Object}
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*/
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this.compactionOptions = null;
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/**
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* Associative-array containing the compression options.
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* @type {Object}
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*/
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this.compression = null;
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/**
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* Specifies the probability of read repairs being invoked over all replicas in the current data center.
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* @type {number}
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*/
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this.localReadRepairChance = 0;
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/**
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* Specifies the probability with which read repairs should be invoked on non-quorum reads. The value must be
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* between 0 and 1.
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* @type {number}
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*/
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this.readRepairChance = 0;
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/**
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* An associative Array containing extra metadata for the table.
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* <p>
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* For Apache Cassandra versions prior to 3.0.0, this method always returns <code>null</code>.
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* </p>
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* @type {Object}
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*/
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this.extensions = null;
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/**
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* When compression is enabled, this option defines the probability
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* with which checksums for compressed blocks are checked during reads.
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* The default value for this options is 1.0 (always check).
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* <p>
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* For Apache Cassandra versions prior to 3.0.0, this method always returns <code>null</code>.
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* </p>
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* @type {Number|null}
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*/
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this.crcCheckChance = null;
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/**
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* Whether the populate I/O cache on flush is set on this table.
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* @type {Boolean}
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*/
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this.populateCacheOnFlush = false;
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/**
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* Returns the default TTL for this table.
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* @type {Number}
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*/
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this.defaultTtl = 0;
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/**
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* * Returns the speculative retry option for this table.
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* @type {String}
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*/
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this.speculativeRetry = 'NONE';
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/**
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* Returns the minimum index interval option for this table.
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* <p>
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* Note: this option is available in Apache Cassandra 2.1 and above, and will return <code>null</code> for
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* earlier versions.
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* </p>
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* @type {Number|null}
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*/
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this.minIndexInterval = 128;
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/**
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* Returns the maximum index interval option for this table.
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* <p>
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* Note: this option is available in Apache Cassandra 2.1 and above, and will return <code>null</code> for
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* earlier versions.
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* </p>
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* @type {Number|null}
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*/
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this.maxIndexInterval = 2048;
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/**
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* Array describing the table columns.
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* @type {Array}
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*/
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this.columns = null;
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/**
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* An associative Array of columns by name.
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* @type {Object}
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*/
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this.columnsByName = null;
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/**
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* Array describing the columns that are part of the partition key.
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* @type {Array}
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*/
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this.partitionKeys = [];
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/**
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* Array describing the columns that form the clustering key.
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* @type {Array}
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*/
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this.clusteringKeys = [];
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/**
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* Array describing the clustering order of the columns in the same order as the clusteringKeys.
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* @type {Array}
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*/
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this.clusteringOrder = [];
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/**
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* An associative Array containing nodesync options for this table.
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* <p>
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* For DSE versions prior to 6.0.0, this method always returns {@code null}. If nodesync
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* was not explicitly configured for this table this method will also return {@code null}.
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* </p>
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* @type {Object}
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*/
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this.nodesync = null;
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}
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util.inherits(DataCollection, events.EventEmitter);
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module.exports = DataCollection;
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