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The JobConf and Configuration objects (at least through Hadoop 0.19.0) handle parameters that are sets of String objects by storing them internally as comma-separated lists in a single String. There is no provision for escaping the commas. This method will get the value associated with name in the configuration and split the String on commas and return the resulting array (see Listing A-8). If there is no value stored in the configuration for name, the array built from the defaultValue parameters will be returned. Listing A-8. Sample Use of public String[] getStrings(String name, String... defaultValue) JobConf empty = new JobConf(false); /** Create an empty configuration to * ensure the default value is used in our getStrings example.*/ String[] pathSet = conf.getStrings("path.set", "path1", "path2", "path3", path4"); for( String path : pathSet ) { System.out.println( path ); }

Figure 11-6. The Workflow Designer e-mail editor 23. Address the e-mail as necessary, and add some text in the body area. Note that you can use the Add Lookup to Body button at the bottom of the form to insert tokens for values from the current workflow item. 24. Click OK. 25. This finishes this step. Click Add workflow step in the right-hand pane to add the next step. 26. Rename step 2 to Auto Approve. 27. For the condition, select Compare Expense Reports field. 28. Set the condition to be If Total is less than 100. 29. Select the Set Field in Current Item action, and change it to Set Status to Approved. 30. Click the Add Else If Conditional Branch link. 31. Leave the condition blank; add an action to e-mail the submitter s manager. 32. Add the Wait for Field Change in Current Item action and change it to Wait for Status to Equal Approved by Manager. (Note that the value gives you a drop-down list populated with the choices you entered in the custom column.) 33. Click the Finish button. If everything went well, your workflow will be published to the site. If you fill out a form and add it to the site, select Workflows from the item s context menu and you will see your ExpenseReptWF workflow here, ready to be started. That s all there is to it!

At the most basic level, browsers are tools for displaying resources on the Web, resources that are stored in special places called servers At the heart of the Web is the communication between browsers and servers, and it is this communication that underlies everything we do online The communication between browsers and servers is a very complex topic, one that touches subjects we don t really need in our discussion However, a certain part of browser-server communication the request-response flow is integral to understanding web applications, and we need a basic understanding of this process in order to fully grasp the things we ll see later When a browser loads a resource, it first sends a request to the server A request is a set of directives containing information about what exactly we re requesting, as well as other criteria for the resource we re trying to fetch.

public void setStrings(String name, String... values)

Stores the set of Strings provided in values under the key name in the configuration, deleting any prior value (see Listing A-9). The set of String objects defined by values is concatenated using the comma (,) character as a separator, and the resulting String is stored in the configuration under name.

You ll see that the editor is fairly straightforward as to how it works. However, you should also be able to see from the use of the Status column you created that any kind of intricate workflow is going to require additional design on the form, the library, and the workflow to keep track of status and approvals. If you need to deal with things like, If Joe hasn t approved it in ten days, forward to Mary, or calculations on form values, the SharePoint Workflow Designer quickly becomes insufficient for the task. The next section will move on to developing a workflow with code-behind in Visual Studio.