kvclient-js
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Oracle NoSQL Database node.js Client API.
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<h1 class="page-title">Source: Readable.js</h1>
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<pre class="prettyprint source linenums"><code>/*-
*
* This file is part of Oracle NoSQL Database
* Copyright (C) 2011, 2014 Oracle and/or its affiliates. All rights reserved.
*
* If you have received this file as part of Oracle NoSQL Database the
* following applies to the work as a whole:
*
* Oracle NoSQL Database server software is free software: you can
* redistribute it and/or modify it under the terms of the GNU Affero
* General Public License as published by the Free Software Foundation,
* version 3.
*
* Oracle NoSQL Database is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Affero General Public License for more details.
*
* If you have received this file as part of Oracle NoSQL Database Client or
* distributed separately the following applies:
*
* Oracle NoSQL Database client software is free software: you can
* redistribute it and/or modify it under the terms of the Apache License
* as published by the Apache Software Foundation, version 2.0.
*
* You should have received a copy of the GNU Affero General Public License
* and/or the Apache License in the LICENSE file along with Oracle NoSQL
* Database client or server distribution. If not, see
* <http://www.gnu.org/licenses/>
* or
* <http://www.apache.org/licenses/LICENSE-2.0>.
*
* An active Oracle commercial licensing agreement for this product supersedes
* these licenses and in such case the license notices, but not the copyright
* notice, may be removed by you in connection with your distribution that is
* in accordance with the commercial licensing terms.
*
* For more information please contact:
*
* berkeleydb-info_us@oracle.com
*
*/
"use strict";
/*global kvLogger*/
/*global LOG_LEVELS*/
/*global Errors*/
/*global Types*/
var readable = require('stream').Readable;
util.inherits(Readable, readable);
function parseRow(row) {
if (row)
if (row.jsonRow) {
row.row = JSON.parse(row.jsonRow);
delete row.jsonRow;
}
return row;
}
/**
* Creates a Stream based on
* @param kvClient
* @param result
* @constructor
*/
function Readable(/*kvClient*/ kvClient, /*TIteratorResult*/ result) {
readable.call(this);
var self = this;
self.kvClient = kvClient;
self.iteratorId = result.iteratorId;
self.buffer = result.result.rowsWithMetadata;
self.hasMore = result.hasMore;
self.index = 0;
self.length = self.buffer.length - 1;
self.buffering = false;
}
Readable.prototype._read = function _read(n) {
var self = this;
if (self.length>=self.index) { //available from buffer
//console.log(self.buffer[self.index].jsonRow);
return self.push(self.buffer[self.index++].jsonRow);
}
if (self.hasMore && !self.buffering) {
self.buffering = true;
self.kvClient.iteratorNext(self.iteratorId, function (err, result) {
if (result) {
self.hasMore = result.hasMore;
self.buffer = result.result.rowsWithMetadata;
self.index = 0;
self.length = self.buffer.length - 1;
self.push(self.buffer[self.index++].jsonRow);
}
if (err) {
console.log(err);
}
self.buffering = false;
});
return self.push('');
}
if (self.buffering) {
return self.push('');
}
return self.push(null);
}
module.exports = Readable;
</code></pre>
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<h2><a href="index.html">Index</a></h2><h3>Classes</h3><ul><li><a href="Configuration.html">Configuration</a></li><li><a href="Durability.html">Durability</a></li><li><a href="FieldRange.html">FieldRange</a></li><li><a href="Iterator.html">Iterator</a></li><li><a href="Logger.html">Logger</a></li><li><a href="Operation.html">Operation</a></li><li><a href="ProxyConfiguration.html">ProxyConfiguration</a></li><li><a href="Readable.html">Readable</a></li><li><a href="ReadOptions.html">ReadOptions</a></li><li><a href="SecurityProperties.html">SecurityProperties</a></li><li><a href="Store.html">Store</a></li><li><a href="VerifyProperties.html">VerifyProperties</a></li><li><a href="WriteOptions.html">WriteOptions</a></li></ul><h3>Global</h3><ul><li><a href="global.html#readProxyConfiguration">readProxyConfiguration</a></li><li><a href="global.html#ReplicaAckPolicy">ReplicaAckPolicy</a></li><li><a href="global.html#ReturnChoice">ReturnChoice</a></li><li><a href="global.html#SimpleConsistency">SimpleConsistency</a></li><li><a href="global.html#startProxy">startProxy</a></li><li><a href="global.html#stopProxy">stopProxy</a></li><li><a href="global.html#SyncPolicy">SyncPolicy</a></li></ul>
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Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.3.0-alpha10</a> on Mon Dec 01 2014 16:17:12 GMT-0600 (CST)
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