| <html> |
| <head> |
| <style type='text/css'> |
| iframe {border: 0px} |
| table, tr, td {border: 0px} |
| </style> |
| </head> |
| <body> |
| <h1>Blocking vs Asynchronous REST</h1> |
| <p> |
| This demo calls the EBay WS API both synchronously and asynchronously, |
| to obtain items matching each of the keywords passed on the query |
| string. The time the request thread is held by the servlet is displayed in red for both. |
| </p> |
| |
| <table width='100%'> |
| |
| <tr> |
| <td> |
| <iframe id="f1" width='100%' height='175px' src="testSerial?items=kayak"></iframe> |
| </td> |
| <td> |
| <iframe id="f3" width='100%' height='175px' src="testSerial?items=mouse,beer,gnome"></iframe> |
| </td> |
| </tr> |
| |
| <tr> |
| <td> |
| <iframe id="f2" width='100%' height='175px' src="testAsync?items=kayak"/></iframe> |
| </td> |
| <td> |
| <iframe id="f4" width='100%' height='175px' src="testAsync?items=mouse,beer,gnome"/></iframe> |
| </td> |
| </tr> |
| |
| </table> |
| By the use of Asynchronous Servlets and the Jetty Asychronous client, the server is able to release the thread (green) while |
| waiting for the response from Ebay. This thread goes back into the thread pool and can service many other requests during the wait. |
| This greatly reduces the number of threads needed, which in turn greatly reduces the memory requirements of the server. |
| <p> |
| Press reload to see even better results after JIT and TCP/IP warmup! |
| |
| </body> |
| </html> |
