DataSource Utility: DataSource with Caching
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+ The DataSourceCache plugin enables caching on any DataSource to reduce high-latency calls to remote sources and reduce server load. In this example, the Cache's
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+ Use the plug() method to initialize the DataSourceJSONSchema plugin and pass in the configuration value max to set the maximum size.
YUI().use("datasource-get", "datasource-jsonschema", "datasource-cache", function(Y) { + var source = "remote source", + myDataSource = new Y.DataSource.Get({ + source:"http://query.yahooapis.com/v1/public/yql?format=json&"}), + callback = { + success: function(e){ + alert(e.response); + }, + failure: function(e){ + alert("Could not retrieve data: " + e.error.message); + } + }; + + myDataSource.plug(Y.Plugin.DataSourceJSONSchema, { + schema: { + resultListLocator: "query.results.result", + resultFields: ["title"] + } + }); + + myDataSource.plug(Y.Plugin.DataSourceCache, {max:3}); + + // Adds to cache + myDataSource.sendRequest( + "q=select%20*%20from%20search.web%20where%20query%3D%22foo%22",callback); + // Adds to cache + myDataSource.sendRequest( + "q=select%20*%20from%20search.web%20where%20query%3D%22bar%22",callback); + // Retrieves from cache + myDataSource.sendRequest( + "q=select%20*%20from%20search.web%20where%20query%3D%22foo%22",callback); +});
