...
Here's a simple example to show you the kind of thing you can do from a Groovlet.
Notice the use of implicit variables to access the session, output & request. Also notice that this is more like a script as it doesn't have a class wrapper.
| Code Block | ||
|---|---|---|
| ||
if (!session) {
session = request.getSession(true);
}
if (!session.counter) {
session.counter = 1
}
println """
<html>
<head>
<title>Groovy Servlet</title>
</head>
<body>
Hello, ${request.remoteHost}: ${session.counter}! ${new Date()}
</body>
</html>
"""
session.counter = session.counter + 1
|
...
variable name | bound to | note |
|---|---|---|
request | ServletRequest | - |
response | ServletResponse | - |
context | ServletContext | unlike Struts |
application | ServletContext | unlike Struts |
session | getSession(false) | can be null! see |
params |
| a Map object |
headers |
| a Map object |
out | response.getWriter() | see |
sout | response.getOutputStream() | see |
html | new MarkupBuilder(out) | see |
| json | new StreamingJsonBuilder(out) | see  B |
A The session variable is only set, if there was already a session object. See the 'if (session == null)' checks in the examples above.
...