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<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>Chapter 24. Repeat Task</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2"><link rel="home" href="index.html" title="Antelope Users Guide"><link rel="up" href="bk03.html" title="Additional Ant Tasks"><link rel="prev" href="bk03ch23.html" title="Chapter 23. Split Task"><link rel="next" href="bk03ch25.html" title="Chapter 25. Suite Task"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Chapter 24. Repeat Task</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="bk03ch23.html">Prev</a> </td><th width="60%" align="center">Additional Ant Tasks</th><td width="20%" align="right"> <a accesskey="n" href="bk03ch25.html">Next</a></td></tr></table><hr></div><div class="chapter" title="Chapter 24. Repeat Task"><div class="titlepage"><div><div><h2 class="title"><a name="Repeat"></a>Chapter 24. Repeat Task</h2></div></div></div>
@style@
    <p>
The Repeat task performs the same subtasks over and over a certain number of times or until a condition is met.  Since most tasks are configured when the build file is first loaded and never again, this task may not do what you want.
</p><p>
To use this task in your build files, include a task definition like this:
</p><pre class="programlisting">

    &lt;taskdef name="call" classname="ise.antelope.tasks.Repeat"/&gt;
   
</pre><p>
</p><p>
</p><div class="table"><a name="id2521487"></a><p class="title"><b>Table 24.1. Repeat Task Attributes</b></p><div class="table-contents"><table summary="Repeat Task Attributes" border="1"><colgroup><col><col><col><col></colgroup><thead><tr><th>Attribute</th><th>Description</th><th>Default</th><th>Required</th></tr></thead><tbody><tr><td>count</td><td>The number of times to repeat execution of the nested tasks.</td><td>1</td><td>No</td></tr><tr><td>interval</td><td>How long to wait between repetitions.  If set to 0, only 1 repetition will be performed, this is to avoid a tight loop.</td><td>0</td><td>No</td></tr><tr><td>unit</td><td>The units for interval, allowed values are "milliseconds", "seconds", "minutes", "days", and "weeks"</td><td>seconds</td><td>No</td></tr><tr><td>property</td><td>The name of a property to set upon completion.</td><td>None</td><td>No</td></tr><tr><td>value</td><td>The value to set for the property to be set upon completion.</td><td>None</td><td>No</td></tr></tbody></table></div></div><p><br class="table-break">
</p><p>
Here are a number of examples taken from the unit tests for this task:
</p><pre class="programlisting">

   &lt;target name="test1a"&gt;
      &lt;!-- no count set, verify performs tasks once --&gt;
      &lt;a:var name="count" value="0"/&gt;
      &lt;a:repeat&gt;
         &lt;a:math result="count" operand1="${count}" operand2="1" operation="+"/&gt;
      &lt;/a:repeat&gt;
      &lt;a:assert&gt;
         &lt;bool&gt;
            &lt;mathequals arg1="${count}" arg2="1"/&gt;
         &lt;/bool&gt;
      &lt;/a:assert&gt;
   &lt;/target&gt;

   &lt;target name="test1b"&gt;
      &lt;!-- count &gt; 1, verify performs tasks correct number of times --&gt;
      &lt;a:var name="count" value="0"/&gt;
      &lt;a:repeat count="3" interval="1"&gt;
         &lt;a:math result="count" operand1="${count}" operand2="1" operation="+"/&gt;
      &lt;/a:repeat&gt;
      &lt;a:assert message="Expected 3, got ${count}"&gt;
         &lt;bool&gt;
            &lt;mathequals arg1="${count}" arg2="3"/&gt;
         &lt;/bool&gt;
      &lt;/a:assert&gt;
   &lt;/target&gt;

   &lt;target name="test1c"&gt;
      &lt;!-- count = -1, verify performs tasks indefinitely --&gt;
      &lt;a:var name="count" value="0"/&gt;
      &lt;a:limit maxwait="10"&gt;
         &lt;a:repeat count="-1" interval="1"&gt;
            &lt;a:math result="count" operand1="${count}" operand2="1" operation="+"/&gt;
         &lt;/a:repeat&gt;
      &lt;/a:limit&gt;
      &lt;a:assert&gt;
         &lt;bool&gt;
            &lt;and&gt;
               &lt;a:isgreaterthan arg1="${count}" arg2="8"/&gt;
               &lt;a:islessthan arg1="${count}" arg2="12"/&gt;
            &lt;/and&gt;
         &lt;/bool&gt;
      &lt;/a:assert&gt;
   &lt;/target&gt;

   &lt;target name="test2a"&gt;
      &lt;!-- no interval set, verify performs tasks 10 seconds apart --&gt;
      &lt;a:var name="count" value="0"/&gt;
      &lt;a:stopwatch name="test2a_stopwatch" action="start"/&gt;
      &lt;a:repeat count="2"&gt;
         &lt;a:math result="count" operand1="${count}" operand2="1" operation="+"/&gt;
      &lt;/a:repeat&gt;
      &lt;a:stopwatch name="test2a_stopwatch" action="total"/&gt;
      &lt;a:assert message="Got ${count}, expected 2"&gt;
         &lt;bool&gt;
            &lt;and&gt;
               &lt;a:mathequals arg1="${count}" arg2="2"/&gt;
               &lt;a:islessthan arg1="${test2a_stopwatch}" arg2="11"/&gt;
            &lt;/and&gt;
         &lt;/bool&gt;
      &lt;/a:assert&gt;
   &lt;/target&gt;


   &lt;target name="test2b"&gt;
      &lt;!-- interval set to other than 10 seconds, verify tasks performed correct
           time apart. --&gt;
      &lt;a:var name="count" value="0"/&gt;
      &lt;a:stopwatch name="test2b_stopwatch" action="start"/&gt;
      &lt;a:repeat count="2" interval="5"&gt;
         &lt;a:math result="count" operand1="${count}" operand2="1" operation="+"/&gt;
      &lt;/a:repeat&gt;
      &lt;a:stopwatch name="test2b_stopwatch" action="total"/&gt;
      &lt;a:assert&gt;
         &lt;bool&gt;
            &lt;and&gt;
               &lt;a:mathequals arg1="${count}" arg2="2"/&gt;
               &lt;a:islessthan arg1="${test2b_stopwatch}" arg2="6"/&gt;
            &lt;/and&gt;
         &lt;/bool&gt;
      &lt;/a:assert&gt;
   &lt;/target&gt;

   &lt;target name="test2c"&gt;
      &lt;!-- interval = 0, verify tasks performed just once --&gt;
      &lt;a:var name="count" value="0"/&gt;
      &lt;a:stopwatch name="test2c_stopwatch" action="start"/&gt;
      &lt;a:repeat count="5" interval="0"&gt;
         &lt;a:math result="count" operand1="${count}" operand2="1" operation="+" datatype="int"/&gt;
      &lt;/a:repeat&gt;
      &lt;a:stopwatch name="test2c_stopwatch" action="total"/&gt;
      &lt;a:assert&gt;
         &lt;bool&gt;
            &lt;and&gt;
               &lt;a:mathequals arg1="${count}" arg2="1"/&gt;
               &lt;a:islessthan arg1="${test2c_stopwatch}" arg2="1"/&gt;
            &lt;/and&gt;
         &lt;/bool&gt;
      &lt;/a:assert&gt;
   &lt;/target&gt;

   &lt;target name="test3a"&gt;
      &lt;!-- failOnError not set, verify continues to execute tasks even if one fails --&gt;
      &lt;a:var name="count" value="0"/&gt;
      &lt;a:repeat count="3" interval="1"&gt;
         &lt;a:math result="count" operand1="${count}" operand2="1" operation="+"/&gt;
         &lt;fail/&gt;
      &lt;/a:repeat&gt;
      &lt;a:assert&gt;
         &lt;bool&gt;
            &lt;a:mathequals arg1="${count}" arg2="3"/&gt;
         &lt;/bool&gt;
      &lt;/a:assert&gt;
   &lt;/target&gt;

   &lt;target name="test3b"&gt;
      &lt;!-- failOnError set to false, same as 3a --&gt;
      &lt;a:var name="count" value="0"/&gt;
      &lt;a:repeat count="3" interval="1" failonerror="no"&gt;
         &lt;a:math result="count" operand1="${count}" operand2="1" operation="+"/&gt;
         &lt;fail/&gt;
      &lt;/a:repeat&gt;
      &lt;a:assert&gt;
         &lt;bool&gt;
            &lt;a:mathequals arg1="${count}" arg2="3"/&gt;
         &lt;/bool&gt;
      &lt;/a:assert&gt;
   &lt;/target&gt;

   &lt;target name="test3c"&gt;
      &lt;!-- failOnError set to true, verify build fails if subtask fails --&gt;
      &lt;a:var name="count" value="0"/&gt;
      &lt;a:try&gt;
         &lt;a:repeat count="3" interval="1" failonerror="yes"&gt;
            &lt;a:math result="count" operand1="${count}" operand2="1" operation="+"/&gt;
            &lt;fail/&gt;
         &lt;/a:repeat&gt;
      &lt;/a:try&gt;
      &lt;a:assert&gt;
         &lt;bool&gt;
            &lt;a:mathequals arg1="${count}" arg2="1"/&gt;
         &lt;/bool&gt;
      &lt;/a:assert&gt;
   &lt;/target&gt;

   &lt;target name="test4a"&gt;
      &lt;!-- property name set, value not set, verify property is set to true when task
           is complete --&gt;
      &lt;a:var name="count" value="0"/&gt;
      &lt;a:repeat count="1" interval="1" property="test4a_property"&gt;
         &lt;a:math result="count" operand1="${count}" operand2="1" operation="+"/&gt;
         &lt;fail/&gt;
      &lt;/a:repeat&gt;
      &lt;a:assert&gt;
         &lt;bool&gt;
            &lt;istrue value="${test4a_property}"/&gt;
         &lt;/bool&gt;
      &lt;/a:assert&gt;
   &lt;/target&gt;

   &lt;target name="test4b"&gt;
      &lt;!-- property ame set, value set to a specific value, verify property is set to
           specific value when task is complete --&gt;
      &lt;a:var name="count" value="0"/&gt;
      &lt;a:repeat count="1" interval="1" property="test4b_property" value="good"&gt;
         &lt;a:math result="count" operand1="${count}" operand2="1" operation="+"/&gt;
         &lt;fail/&gt;
      &lt;/a:repeat&gt;
      &lt;a:assert name="test4b_property" value="good"/&gt;
   &lt;/target&gt;

   &lt;target name="test5"&gt;
      &lt;property name="call_count" value="0"/&gt;
      &lt;a:limit seconds="5" failonerror="true"&gt;
         &lt;a:repeat count="-1" interval="1"&gt;
            &lt;a:until&gt;
               &lt;a:contains property="log_contents" substring="All tests passed 4 times." /&gt;
            &lt;/a:until&gt;

            &lt;echo&gt;read log&lt;/echo&gt;
            &lt;a:new&gt;
               &lt;a:call target="readLog"/&gt;
            &lt;/a:new&gt;
            &lt;echo&gt;${call_count} - ${log_contents}&lt;/echo&gt;

         &lt;/a:repeat&gt;
      &lt;/a:limit&gt;
   &lt;/target&gt;

   &lt;target name="readLog"&gt;
      &lt;a:unset name="log_contents"/&gt;
      &lt;a:new&gt;
         &lt;a:math result="call_count" operand1="${call_count}" operand2="1" operation="+" datatype="int"/&gt;
         &lt;property name="log_contents" value="All tests passed ${call_count} times."/&gt;
      &lt;/a:new&gt;
   &lt;/target&gt;

</pre><p>
</p></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="bk03ch23.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="bk03.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="bk03ch25.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Chapter 23. Split Task </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> Chapter 25. Suite Task</td></tr></table></div></body></html>

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