datasource-caching.mustache revision 819e90d415ed17d59af3a247b2ad9d6feb0c21b5
<style scoped>
/* custom styles for this example */
#demo .output {
margin-bottom:1em;
padding:10px;
border:1px solid #D9D9D9;
}
#demo .output pre {
font-size: 11px;
}
#demo .output strong {
padding: .25em .4em;
background: #333;
color: #fff;
text-shadow: -1px -1px 1px #000;
border-radius: 5px;
}
</style>
<div class="intro">
<p>The DataSourceCache plugin enables caching on any DataSource to reduce high-latency calls to remote sources and to reduce server load. In this example, the Cache's `max` value has been set to `3`.
</div>
<div class="example yui3-skin-sam">
{{>datasource-caching-source}}
</div>
<p>Use the <code>plug()</code> method to initialize the
<code>DataSourceCache</code> plugin and pass in the configuration value
<code>max</code> to set the maximum size.</p>
```
YUI().use("datasource", "dataschema", "cache", function (Y) {
var callback = {
success: function (e) { /* output to screen */ },
failure: function (e) { /* output to screen */ }
},
myDataSource = new Y.DataSource.Get({
source: "https://api.github.com/users/",
// this is only needed because the query appends the url
// rather than the url's query params
generateRequestCallback: function (guid) {
return '/repos?callback=YUI.Env.DataSource.callbacks.' + guid;
}
}),
schema: {
resultListLocator: "data",
resultFields: ["name"]
}
});
myDataSource.plug(Y.Plugin.DataSourceCache, { max: 3 });
// Adds to cache
request : "lsmith",
callback: callback
});
// Adds to cache
request : "davglass",
callback: callback
});
// Retrieves from cache
request : "lsmith",
callback: callback
});
});
```
<h3 id="fullsource">Full Example Source Listing</h3>
```
{{>datasource-caching-source}}
```