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{ String indexPath; public void init(PortletConfig config) throws PortletException { super.init(config); //get the location of the lucene index from the //indexPath initialization parameter indexPath = config.getInitParameter("indexPath"); if (indexPath == null) { //this portlet requires this parameter String errMsg = "The init parameter indexPath must be set."; throw new UnavailableException(errMsg); } //set Lucene lockdir because java.io.tmpdir may not exist in Pluto System.setProperty("org.apache.lucene.lockdir", indexPath); } public void doView(RenderRequest request, RenderResponse response) throws PortletException, IOException { response.setContentType("text/html"); Writer writer = response.getWriter(); PortletContext portletContext = getPortletContext(); PortletSession session = request.getPortletSession(); PortletRequestDispatcher prd = portletContext.getRequestDispatcher("/WEB-INF/jsp/SearchForm.jsp"); prd.include(request, response); String contentPath = request.getParameter("contentPath"); if (request.getParameter("query") != null) { request.setAttribute("indexPath", indexPath); PortletRequestDispatcher prd2 = portletContext.getRequestDispatcher(

If you have many Drupal sites running from separate databases, you may find cases where it is useful to share tables among databases. As noted in the previous section, a good example is the zipcodes table in the Location module (discussed in 4), which is read-only and quite large. Importing the zipcodes table into every one of your databases would be wasteful and redundant. This makes it a perfect candidate for being shared by all of your sites that use the Location module. The solution involves creating a new database dedicated to the zip code information. It s similar to the solution offered in the previous section, but preferred in situations where it is possible to create multiple databases. The secret ingredient in this configuration lies in the $db_prefix variable. Instead of using the prefix as a means for identifying a prefixed table in the same database, it can be used to change databases altogether, as shown in Listing 6-5. Listing 6-5. Using Prefixes to Select Databases $db_prefix = array( 'default' => 'db_site1.', 'zipcodes' => 'db_zipcodes.' );

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"/WEB-INF/jsp/SearchResults.jsp"); prd2.include(request, response); } else if (contentPath != null) { File file = new File(contentPath); if (!file.exists()) { writer.write("Requested content does not exist."); return; } //write the content of the file out FileReader fr = new FileReader(file); BufferedReader br = new BufferedReader(fr); String line; while ((line = br.readLine()) != null) { writer.write(line); } } } public void processAction(ActionRequest request, ActionResponse response) throws PortletException, IOException { //increase the portlet's size response.setWindowState(WindowState.MAXIMIZED); //pass the query to the render method response.setRenderParameter("query", request.getParameter("query")); } }

In this chapter, we ve used the same simple pointcut in aspects over and over The AspectJ pointcut language is extremely powerful and versatile in how it can select join points Remember that Spring AOP supports only method executions as join points While this is far less than what is supported by AspectJ, you can still do some pretty neat things with method executions alone Specifically, pointcuts allow you to select methods based on a wide variety of criteria, and you can combine criteria with logical operators to narrow down the selection In Spring AOP the goal of pointcuts is to select public or protected methods Methods are , declared in Java classes, but when selecting them, you often want to escape the narrow boundary of classes and generalize.

Listing 6-5 assigns the default prefix to db_site1. (note the period after the database names). This trick works because MySQL will then look for db_site1.some_table, which, in effect, says, Use some_table from the db_site1 database. The value you use for the prefix corresponds to the name of the database to be used (plus the dot). This is also the database part of the $db_url variable in settings.php: $db_url = 'mysql://username:password@localhost/database'; The caveat is that the db_site1 and db_zipcodes databases will both be accessed with the same username and password pair; there is currently no method for configuring separate database connections for individual tables. Use your database administration tool or the following MySQL command to grant access to the db_zipcodes database for the username that you use to access the main database: grant select on db_zipcodes.zipcodes to username@localhost; Since the db_zipcodes table should be read-only, the SELECT privilege is sufficient. Whenever the zipcodes table is needed by this site, it will use the db_zipcodes database; in all other cases, db_site1 will be used.

Lucene is capable of indexing any file format for documents, but the application that uses the Lucene search engine is responsible for translating these document types into a format that Lucene can understand. You can use open source or free solutions to index several of these, including HTML, PDF, Word, and Excel. Many Lucene users use more than one of these in their applications. Indexing XML documents usually requires custom development, because XML schemas and

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