| // program to illustrate use of BSF in a JSP-generated servlet |
| // like scenario. The model is there's a series of Java code pieces |
| // intermixed with a series of NetRexx code pieces. |
| |
| import org.apache.bsf.*; |
| |
| public class JSPLikeInNetRexx { |
| BSFManager mgr = new BSFManager (); |
| { mgr.setTempDir ("/tmp"); } // test the tmp dir stuff |
| //{ mgr.setDebug (true); } |
| BSFEngine rexx; |
| |
| /* assume that the JSP page is compiled into the constructor: |
| intermix java and javascript code now. The .jsp could've looked |
| like the following (I'm accepting Sanjiva's guesses about syntax here.). |
| I'm assuming that language was set to NetRexx somewhere before. |
| |
| Unlike Javascript, standard NetRexx doesn't have the concept of a |
| default persistant execution environment. Any data to be stored |
| between NetRexx invocations has to be explicitly placed in a |
| Property if it's local (which, given the way the NetRexx binding |
| has been done in this prototype, means working with minor |
| classes) or stashed in the BSF environment's registry if it's |
| global. Neither is needed for this simple example; obtaining a |
| new Date is painless (we'd need to provide the classname for the |
| variable anyway) and "response" is already in the registry. |
| |
| <html> |
| <head><title>JSPLike</title></head> |
| <body> |
| <h1>Welcome at <%= return java.util.Date().toString %></h1> |
| stuff |
| Response bean's length is: <%= |
| return (java.lang.String bsf.lookupBean('response')).length %> |
| Response bean's uppercase value is: <%= |
| return (java.lang.String bsf.lookupBean('response')).toUpperCase () %> |
| <h5>Page generation done at <%= return java.util.Date().toString() %></h5> |
| </body> |
| </html> */ |
| public JSPLikeInNetRexx () throws BSFException { |
| rexx = mgr.loadScriptingEngine ("netrexx"); |
| |
| System.out.println("<!- Using "+rexx.eval ("", 0, 0,"Version")+" ->"); |
| |
| // first register the response bean into the runtime |
| mgr.registerBean ("response", new String ("howdy-doody")); |
| |
| Object result; |
| |
| System.out.println ("<html>"); |
| System.out.println ("<head><title>JSPLike</title></head>"); |
| System.out.println ("<body>"); |
| |
| System.out.print ("<h1>Welcome at "); |
| result = rexx.eval ("", 0, 0,"java.util.Date().toString()"); |
| System.out.println (result + "</h1>"); |
| System.out.println ("stuff"); |
| System.out.print ("Response bean's length is: "); |
| result = rexx.eval ("", 0, 0,"java.lang.Integer((java.lang.String " + |
| "bsf.lookupBean('response')).length)"); |
| System.out.println (result); |
| System.out.print ("Response bean's uppercase value is: "); |
| result = rexx.eval ("", 0, 0,"(java.lang.String bsf.lookupBean('response')).toUpperCase()"); |
| System.out.println (result); |
| System.out.print ("<h5>Page generation done at "); |
| result = rexx.eval ("", 0, 0,"java.util.Date().toString()"); |
| System.out.println (result + "</h5>"); |
| System.out.println ("</body>"); |
| System.out.println ("</html>"); |
| } |
| |
| public static void main (String[] args) throws Exception { |
| new JSPLikeInNetRexx (); |
| } |
| } |
