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Create a Data Access Object for Google Search Results using JDBI

A brief overview of creating a SQL Object API for Google Search results in JDBI.

JDBI is a SQL convenience library for Java that exposes two different style APIs, a fluent style and a SQL object style. The CData JDBC Driver for Google Search integrates connectivity to live Google Search results in Java applications. By pairing these technologies, you gain simple, programmatic access to Google Search results. This article walks through building a basic Data Access Object (DAO) and the accompanying code to read Google Search results.

Create a DAO for the Google Search VideoSearch Entity

The interface below declares the desired behavior for the SQL object to create a single method for each SQL statement to be implemented.

public interface MyVideoSearchDAO { //request specific data from Google Search (String type is used for simplicity) @SqlQuery("SELECT ViewCount FROM VideoSearch WHERE SearchTerms = :searchTerms") String findViewCountBySearchTerms(@Bind("searchTerms") String searchTerms); /* * close with no args is used to close the connection */ void close(); }

Open a Connection to Google Search

Collect the necessary connection properties and construct the appropriate JDBC URL for connecting to Google Search.

To search with a Google custom search engine, you need to set the CustomSearchId and ApiKey connection properties.

To obtain the CustomSearchId property, sign into Google Custom Search Engine and create a new search engine.

To obtain the ApiKey property, you must enable the Custom Search API in the Google API Console.

Built-in Connection String Designer

For assistance in constructing the JDBC URL, use the connection string designer built into the Google Search JDBC Driver. Either double-click the JAR file or execute the jar file from the command-line.

java -jar cdata.jdbc.googlesearch.jar

Fill in the connection properties and copy the connection string to the clipboard.

A connection string for Google Search will typically look like the following:

jdbc:googlesearch:CustomSearchId=def456;ApiKey=abc123;

Use the configured JDBC URL to obtain an instance of the DAO interface. The particular method shown below will open a handle bound to the instance, so the instance needs to be closed explicitly to release the handle and the bound JDBC connection.

DBI dbi = new DBI("jdbc:googlesearch:CustomSearchId=def456;ApiKey=abc123;"); MyVideoSearchDAO dao = dbi.open(MyVideoSearchDAO.class); //do stuff with the DAO dao.close();

Read Google Search Results

With the connection open to Google Search, simply call the previously defined method to retrieve data from the VideoSearch entity in Google Search.

//disply the result of our 'find' method String viewCount = dao.findViewCountBySearchTerms("WayneTech"); System.out.println(viewCount);

Since the JDBI library is able to work with JDBC connections, you can easily produce a SQL Object API for Google Search by integrating with the CData JDBC Driver for Google Search. Download a free trial and work with live Google Search results in custom Java applications today.