nosqldb-oraclejs
Version:
Oracle NoSQL Database JS Driver
186 lines (155 loc) • 8.99 kB
HTML
<html lang="en">
<head>
<meta charset="utf-8">
<title>JSDoc: Source: readable.js</title>
<script src="scripts/prettify/prettify.js"> </script>
<script src="scripts/prettify/lang-css.js"> </script>
<!--[if lt IE 9]>
<script src="//html5shiv.googlecode.com/svn/trunk/html5.js"></script>
<![endif]-->
<link type="text/css" rel="stylesheet" href="styles/prettify-tomorrow.css">
<link type="text/css" rel="stylesheet" href="styles/jsdoc-default.css">
</head>
<body>
<div id="main">
<h1 class="page-title">Source: readable.js</h1>
<section>
<article>
<pre class="prettyprint source linenums"><code>/*-
*
* This file is part of Oracle NoSQL Database
* Copyright (C) 2014, 2018 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 Logger*/
/*global LOG_LEVELS*/
/*global Errors*/
/*global Types*/
var parse = require('./parse');
var readable = require('stream').Readable;
util.inherits(Readable, readable);
/**
* Readable Stream object.
* Contains a set of rows as result of parameters sent to the method
* that generated this object.
* The result is obtained via standard readable stream usage.
* For more information about how the Streams work please refer to:
* https://nodejs.org/api/stream.html
* @class Readable
*/
function Readable(/*Store*/ store, /*TIteratorResult*/ result) {
readable.call(this);
var self = this;
var client = store.thriftClient;
var iteratorId = result.iteratorId;
var buffer = result.result.rowsWithMetadata;
var hasMore = result.hasMore;
var index = 0;
var length = buffer.length - 1;
var buffering = false;
var countRead = 0;
function reportError(error, callback) {
callback = callback || function(){};
Logger.error(error);
callback(error);
try {
this.emit('error', error);
} catch (error) {
Logger.debug("No error event available to catch error: " + error);
}
}
self._read = function _read(n) {
if (buffering)
return self.push('');
if (length >= index) {
return self.push(buffer[index++].jsonRow);
}
if (hasMore) {
buffering = true;
Logger.debug('[STREAM] Calling for the next chunk of data...');
client.iteratorNext(iteratorId, function (err, result) {
if (err) {
var error = Errors.getProxyError(err, 'readable._read()');
reportError(error);
return self.push(null);
} else if (result) {
hasMore = result.hasMore;
buffer = result.result.rowsWithMetadata;
index = 0;
length = buffer.length - 1;
}
buffering = false;
self.resume();
}); // iteratorNext
self.pause();
return self.push('');
}
return self.push(null);
}
}
/**
* Called when an error occurred
* @event Readable#error
*/
/**
* Called when the Stream has data to be read
* @event Readable#data
*/
/**
* Called when there is no more data available in the Stream
* @event Readable#end
*/
module.exports = Readable;
</code></pre>
</article>
</section>
</div>
<nav>
<h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="Configuration.html">Configuration</a></li><li><a href="ConnectionError.html">ConnectionError</a></li><li><a href="Consistency.html">Consistency</a></li><li><a href="DeleteResult.html">DeleteResult</a></li><li><a href="Durability.html">Durability</a></li><li><a href="ExecutionFuture.html">ExecutionFuture</a></li><li><a href="ExecutionId.html">ExecutionId</a></li><li><a href="FieldRange.html">FieldRange</a></li><li><a href="GetResult.html">GetResult</a></li><li><a href="Iterator.html">Iterator</a></li><li><a href="IteratorError.html">IteratorError</a></li><li><a href="KeyPair.html">KeyPair</a></li><li><a href="KeyPairResult.html">KeyPairResult</a></li><li><a href="Logger.html">Logger</a></li><li><a href="ModuleInfo.html">ModuleInfo</a></li><li><a href="MultiGetKeyResult.html">MultiGetKeyResult</a></li><li><a href="MultiGetResult.html">MultiGetResult</a></li><li><a href="NoSQLDBError.html">NoSQLDBError</a></li><li><a href="Operation.html">Operation</a></li><li><a href="ParameterError.html">ParameterError</a></li><li><a href="ProxyConfiguration.html">ProxyConfiguration</a></li><li><a href="PutResult.html">PutResult</a></li><li><a href="Readable.html">Readable</a></li><li><a href="ReadOptions.html">ReadOptions</a></li><li><a href="ReplicaAckPolicy.html">ReplicaAckPolicy</a></li><li><a href="ReturnChoice.html">ReturnChoice</a></li><li><a href="ReturnKey.html">ReturnKey</a></li><li><a href="ReturnRow.html">ReturnRow</a></li><li><a href="Row.html">Row</a></li><li><a href="SimpleConsistency.html">SimpleConsistency</a></li><li><a href="StatementResult.html">StatementResult</a></li><li><a href="Store.html">Store</a></li><li><a href="StoreError.html">StoreError</a></li><li><a href="SyncPolicy.html">SyncPolicy</a></li><li><a href="TimeConsistency.html">TimeConsistency</a></li><li><a href="TimeToLive.html">TimeToLive</a></li><li><a href="UpdateResult.html">UpdateResult</a></li><li><a href="VerifyProperties.html">VerifyProperties</a></li><li><a href="Version.html">Version</a></li><li><a href="VersionConsistency.html">VersionConsistency</a></li><li><a href="WriteOptions.html">WriteOptions</a></li></ul><h3>Events</h3><ul><li><a href="Iterator.html#event:close">close</a></li><li><a href="Iterator.html#event:data">data</a></li><li><a href="Iterator.html#event:done">done</a></li><li><a href="Iterator.html#event:error">error</a></li><li><a href="Readable.html#event:data">data</a></li><li><a href="Readable.html#event:end">end</a></li><li><a href="Readable.html#event:error">error</a></li><li><a href="Store.html#event:close">close</a></li><li><a href="Store.html#event:error">error</a></li><li><a href="Store.html#event:open">open</a></li></ul><h3>Global</h3><ul><li><a href="global.html#AuthenticationFailureException">AuthenticationFailureException</a></li><li><a href="global.html#AuthenticationRequiredException">AuthenticationRequiredException</a></li><li><a href="global.html#ConsistencyException">ConsistencyException</a></li><li><a href="global.html#DurabilityException">DurabilityException</a></li><li><a href="global.html#FaultException">FaultException</a></li><li><a href="global.html#IllegalArgumentException">IllegalArgumentException</a></li><li><a href="global.html#readConfiguration">readConfiguration</a></li><li><a href="global.html#RequestLimitException">RequestLimitException</a></li><li><a href="global.html#RequestTimeoutException">RequestTimeoutException</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#TableOpExecutionException">TableOpExecutionException</a></li><li><a href="global.html#TimeUnit">TimeUnit</a></li><li><a href="global.html#UnauthorizedException">UnauthorizedException</a></li><li><a href="global.html#UnknownException">UnknownException</a></li></ul>
</nav>
<br class="clear">
<footer>
Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 3.6.3</a> on Thu Aug 01 2019 14:19:18 GMT+0530 (India Standard Time)
</footer>
<script> prettyPrint(); </script>
<script src="scripts/linenumber.js"> </script>
</body>
</html>