<concurrent>
Executes the subtasks concurrently using the thread pool from the request under the default attribute name 'ConcurrentAttributes.EXECUTOR_SERVICE'.
Use this task within a <thread-pool> task.
| Name | XPath | Description | Reagent Type | Expected Type | Required |
|---|---|---|---|---|---|
| EXECUTOR_SERVICE | @executor-service | Optional instance of ExecutorService. The default is a request attribute under the name 'ConcurrentAttributes.EXECUTOR_SERVICE'. | PHRASE | java.util.concurrent.ExecutorService | No |
| FAIL_FAST | @fail-fast | If true an exception from a sub task will cause the parent thread pool to be shutdown immediately. Thedefault is true. | PHRASE | java.lang.String | No |
| SUBTASKS | * | The set of tasks that are children of this task. | NODE_LIST | java.util.List | No |
Creates an array of three URLs in JavaScript, then computes a checksum value ten times for one of the URLs in the array (distributed evenly) using a pool of five threads, writing the current count and checksum value to the console each time:
<js>
<script>var urls = ['http://www.google.com/', 'http://www.amazon.com/', 'http://www.yahoo.com/']; ScriptAttributes.RESPONSE.setAttribute('urls', urls);</script>
<subtasks>
<thread-pool threads="5">
<for-each attribute-name="num" items="${groovy([1, 2, 3, 4, 5, 6, 7, 8, 9, 10])}">
<concurrent>
<echo-ln>${num}=${checksum(${js(urls[num % 3])})}</echo-ln>
</concurrent>
</for-each>
</thread-pool>
</subtasks>
</js>