Trycatch

A wrapper that lets you run a set of tasks and optionally run a different set of tasks if the first set fails and yet another set after the first one has finished.

This mirrors Java's try/catch/finally.

The tasks inside of the required <try> element will be run. If one of them should throw a BuildException several things can happen:

If there is no <catch> block, the exception will be passed through to Ant.
If the property attribute has been set, a property of the given name will be set to the message of the exception.
If the reference attribute has been set, a reference of the given id will be created and point to the exception object.
If there is a <catch> block, the tasks nested into it will be run.

If a <finally> block is present, the task nested into it will be run, no matter whether the first tasks have thrown an exception or not.

Parameters

Attribute	Description	Required
property	Name of a property that will receive the message of the exception that has been caught (if any)	No.
reference	Id of a reference that will point to the exception object that has been caught (if any)	No

Example

<trycatch property="foo" reference="bar">
  <try>
    <fail>Tada!</fail>
  </try>

  <catch>
    <echo>In &lt;catch&gt;.</echo>
  </catch>

  <finally>
    <echo>In &lt;finally&gt;.</echo>
  </finally>
</trycatch>

<echo>As property: ${foo}</echo>
<property name="baz" refid="bar" />
<echo>From reference: ${baz}</echo>

results in

  [trycatch] Caught exception: Tada!
      [echo] In <catch>.
      [echo] In <finally>.
      [echo] As property: Tada!
      [echo] From reference: Tada!