Solr and symfony in Harmony with SolrJs

#1

Solr and symfony in Harmony with SolrJs
Doc. v. 0.1 - 21/04/09

Wildan Maulana | wildan [at] tobethink.com

About SolrJs
• SolrJS is a JQuery based ajaxian
interface to the Solr search engine
• One of the 2008 Google summer of
code project topic
• Still work in progress but already been
useable, watch
http://wiki.apache.org/solr/SolrJS for
newest info

About SolrJs - Cont

• Written In Object
Oriented JavaScript

Architectural Overview
SolrJS → a collection of reusable and extendable “widget”
•
A widget is a javascript object that is responsible for creating the according
•
solr query as well as render the result from the server to html
One manager object acts as a container that holds these widgets, performs
•
the actual query using jQueries getJSON
http://docs.jquery.com/Ajax/jQuery.getJSON#urldatacallback method
There are two base types of widgets:
•
– client side widgets: They get a Javascript JSON response from the
server and render the needed html for the widget using jQuery javascript
code.
– server side widgets: They move the rendering logic to the server,
using the VelocityResponseWriter (see
https://issues.apache.org/jira/browse/SOLR-620. The widget then only
quot;copiesquot; the html reponse from the server into the target div.
The Js files is organized in “packages” like in a Java Application:
•
– core: The manager and other base classes.
– server: server side widgets
– client: client side widgets

The Manager Object
addSelectionView(widget)
•
Adds a selection view to this manager.
addWidget(widget)
•
Adds a widget to this manager.
containsItem(item)
•
Checks if the given item is available in the current selection.
deselectItem(widgetId)
•
Removes the given item from the current selection, regardless of widgets.
deselectItems(widgetId)
•
Removes the given items from the current selection.
doRequest(start, resultsOnly)
•
Creates a query out of the current selection and calls all bound widgets to
request their data from the server.
doRequestAll()
•
Sets the current selection to *:* and requests all docs.
getLoadingDiv()
•
Helper method that returns an ajax-loading.gif inside a div.
selectItems(widgetId, items)
•
Adds the given items to the current selection.

Document
<REUTERS TOPICS=quot;YESquot; LEWISSPLIT=quot;TRAINquot; CGISPLIT=quot;TRAINING-SETquot; OLDID=quot;5544quot; NEWID=quot;1quot;>
<DATE>26-FEB-1987 15:01:01.79</DATE>
<TOPICS><D>cocoa</D></TOPICS>
<PLACES><D>el-salvador</D><D>usa</D><D>uruguay</D></PLACES>
<PEOPLE></PEOPLE>
<ORGS></ORGS>
<EXCHANGES></EXCHANGES>
<COMPANIES></COMPANIES>
<UNKNOWN>
C T
f0704reute
u f BC-BAHIA-COCOA-REVIEW 02-26 0105</UNKNOWN>
<TEXT>
<TITLE>BAHIA COCOA REVIEW</TITLE>
<DATELINE> SALVADOR, Feb 26 - </DATELINE>
<BODY>
content here ........
</BODY>
</TEXT>
</REUTERS>

Response Example on SolrAdmin: Cocoa

<response> <str>SV</str>
<lst name=quot;responseHeaderquot;> <str>US</str>
<int name=quot;statusquot;>0</int> <str>UY</str>
<int name=quot;QTimequot;>35</int> </arr>
<lst name=quot;paramsquot;> <date name=quot;datequot;>1987-02-26T08:01:01.079Z</date>
<str name=quot;indentquot;>on</str> <str name=quot;datelinequot;>SALVADOR, Feb 26 -</str>
<str name=quot;startquot;>0</str> <str name=quot;idquot;>1</str>
<str name=quot;qquot;>cocoa</str> <arr name=quot;placesquot;>
<str name=quot;versionquot;>2.2</str> <str>el-salvador</str>
<str name=quot;rowsquot;>10</str> <str>usa</str>
</lst> <str>uruguay</str>
</lst> </arr>
<result name=quot;responsequot; numFound=quot;1quot; start=quot;0quot;> <str name=quot;textquot;>
<doc> Content here ...
<arr name=quot;allTextquot;> </str>
<str>BAHIA COCOA REVIEW</str> <str name=quot;titlequot;>BAHIA COCOA REVIEW</str>
<str> <arr name=quot;topicsquot;>
Content here ... <str>cocoa</str>
</str> </arr>
<str>el-salvador</str> </doc>
<str>usa</str> </result>
<str>uruguay</str> </response>
<str>cocoa</str>
</arr>
<arr name=quot;countryCodesquot;>

Action and Template
Minimalistic Action

public function executeJs() {
return sfView::SUCCESS ;
}

The Template

<div id=quot;facetsquot; style=quot;float: left; width: 300px;quot;>
<h3 style=quot;margin-top: 0pxquot;>topics</h3>
<div id=quot;topicsquot;></div>
</div>
<div id=quot;resultquot;
style=quot;margin-left: 300px;quot;></div>

<html>
<head>
The Layout ...................
..............
<script>
var $sj = jQuery.noConflict();
</script>

<script>
var solrjsManager;
$sj(document).ready(function(){
solrjsManager = new
$sj.solrjs.Manager({solrUrl:quot;http://localhost:8983/solr/selectquot;});

// a custom result widget
var resultWidget = new $sj.solrjs.SimpleServerSideWidget({
id:quot;resultquot;,
target:quot;#resultquot;,
rows:5,
templateName:quot;resultquot;
});

solrjsManager.addWidget(resultWidget);
solrjsManager.addWidget(new $sj.solrjs.FacetServerSideWidget({id:quot;topicsquot;,
target:quot;#topicsquot;, fieldName:quot;topicsquot;}));
solrjsManager.doRequestAll();
});
</script>

</head>
<body>
<?php echo $sf_content ?>
</body>
</html>

result.vm
#foreach($item in $response.getResults())
<div>
<h3> $item.getFieldValue(quot;titlequot;); </h3>
#if($item.getFieldValue(quot;topicsquot;))
<p>
<i> $item.getFieldValue(quot;topicsquot;);</i>
</p>
#end
<p>
$item.getFieldValue(quot;textquot;);
</p>
</div>
<hr/>
#end

facets.vm

#foreach($item in $response.getFacetFields())
<div>
#foreach($count in $item.getValues())
<a href=quot;javascript:solrjsManager.selectItems('$request.getParams()
.get('solrjs.widgetid')',[new jQuery.solrjs.QueryItem({field:'$count.getFacetField()
.getName()',value:'$count.getName()'})])quot;>
$count.getName()($count.getCount()) </a><br/>
#end
</div>
#end

References
• SolrJS Wiki,
http://wiki.apache.org/solr/SolrJS

Solr and symfony in Harmony with SolrJs

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