Bolt Tutorial, Part I: Courses and Lessons

Creating a course

Install the BOINC software on a Linux system, or run the BOINC server virtual machine in a VMWare player on any computer.

Use make_project to create a BOINC project named "test":

> cd boinc/tools
> make_project --web_only test

Read ~/projects/test/test.readme and do what it says.

Let's say your server's domain name is "a.b.c".

• Visit ​http://a.b.c/test/create_account.php and create an account for yourself.
• Visit ​http://a.b.c/test_ops/bolt_admin.php. Follow the instructions to create the Bolt database, then create a course named "Identifying California conifers" with short name "conifer1".
• Check out the Bolt example files:

  svn co http://boinc.berkeley.edu/svn/trunk/bolt_examples
  

and move them to the corresponding subdirectories of ~/projects/test/html/.

Lessons and sequences

Our first example is a course consisting of 13 lessons. Each lesson consists of a PHP or HTML file. For example, the first lesson is conifer_intro.php.

The course structure is defined by a "course document", trunk/bolt_examples/inc/conifer1.inc.

A course document is like an outline for the course; it is a hierarchy of units. The bottom-level unites are lessons and exercises. Each lesson is specified by:

lesson(
   filename("file_name")
)

The higher-level units are Bolt control structures. In this example we use just one structure: sequence. The syntax for a sequence is:

sequence(
   name("Name of the sequence"),
   lesson(filename("Filename")),
   [ ... other units ]
)

Bolt control structures can be nested: for example, the units in a sequence may include other sequences as well as lessons and exercises.

The course document is a PHP file. It must return a Bolt control structure. In this case, this is done as follows (lines 75-79):

return sequence(
    name('course'),
    intro_lessons(),
    pine_lessons(),
    cypress_lessons()
);

You can use the expressive power of PHP to simplify and organize your course document. For example:

• line 3: we include a separate file, conifer.inc, which defines page header and footer functions.
• lines 5, 23 and 49: we define functions intro_lessons(), pine_lessons() and cypress_lessons, each of which returns a sequence for a section of the course.

Diagramatically, the course structure is:

Now visit ​http://a.b.c/test/bolt.php. You'll be asked to log in; do so. Click on the button to start the course. Fill in the form asking for your demographic info. Then you'll see:

Note that below the lesson, Bolt has added some navigation links and a form to ask questions. Click on the "Next" button. You'll see:

Now suppose that instead of reading the lesson, you go away (for an hour or a month) and return. Simulate this by visiting ​http://a.b.c.test/bolt.php; click Resume. Notice that Bolt "remembers" where you are in the course (this is stored in the database; it will work even if you go to a different computer).

Continue to Part II