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org.apache.tools.ant.taskdefs</FONT>
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Class Parallel</H2>
<PRE>
java.lang.Object
  <IMG SRC="../../../../../resources/inherit.gif" ALT="extended by "><A HREF="../../../../../org/apache/tools/ant/ProjectComponent.html" title="class in org.apache.tools.ant">org.apache.tools.ant.ProjectComponent</A>
      <IMG SRC="../../../../../resources/inherit.gif" ALT="extended by "><A HREF="../../../../../org/apache/tools/ant/Task.html" title="class in org.apache.tools.ant">org.apache.tools.ant.Task</A>
          <IMG SRC="../../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.tools.ant.taskdefs.Parallel</B>
</PRE>
<DL>
<DT><B>All Implemented Interfaces:</B> <DD>java.lang.Cloneable, <A HREF="../../../../../org/apache/tools/ant/TaskContainer.html" title="interface in org.apache.tools.ant">TaskContainer</A></DD>
</DL>
<HR>
<DL>
<DT><PRE>public class <B>Parallel</B><DT>extends <A HREF="../../../../../org/apache/tools/ant/Task.html" title="class in org.apache.tools.ant">Task</A><DT>implements <A HREF="../../../../../org/apache/tools/ant/TaskContainer.html" title="interface in org.apache.tools.ant">TaskContainer</A></DL>
</PRE>

<P>
Executes the contained tasks in separate threads, continuing
 once all are completed.
 <p>
 New behavior allows for the ant script to specify a maximum number of
 threads that will be executed in parallel.  One should be very careful about
 using the <code>waitFor</code> task when specifying <code>threadCount</code>
 as it can cause deadlocks if the number of threads is too small or if one of
 the nested tasks fails to execute completely.  The task selection algorithm
 will insure that the tasks listed before a task have started before that
 task is started, but it will not insure a successful completion of those
 tasks or that those tasks will finish first (i.e. it's a classic race
 condition).
 </p>
<P>

<P>
<DL>
<DT><B>Since:</B></DT>
  <DD>Ant 1.4</DD>
</DL>
<HR>

<A NAME="nested_class_summary"></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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<CODE>static&nbsp;class</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tools/ant/taskdefs/Parallel.TaskList.html" title="class in org.apache.tools.ant.taskdefs">Parallel.TaskList</A></B></CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Class which holds a list of tasks to execute</TD>
</TR>
</TABLE>
&nbsp;

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&nbsp;<A NAME="fields_inherited_from_class_org.apache.tools.ant.Task"></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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<TH ALIGN="left"><B>Fields inherited from class org.apache.tools.ant.<A HREF="../../../../../org/apache/tools/ant/Task.html" title="class in org.apache.tools.ant">Task</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/Task.html#target">target</A>, <A HREF="../../../../../org/apache/tools/ant/Task.html#taskName">taskName</A>, <A HREF="../../../../../org/apache/tools/ant/Task.html#taskType">taskType</A>, <A HREF="../../../../../org/apache/tools/ant/Task.html#wrapper">wrapper</A></CODE></TD>
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&nbsp;<A NAME="fields_inherited_from_class_org.apache.tools.ant.ProjectComponent"></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Fields inherited from class org.apache.tools.ant.<A HREF="../../../../../org/apache/tools/ant/ProjectComponent.html" title="class in org.apache.tools.ant">ProjectComponent</A></B></TH>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/ProjectComponent.html#description">description</A>, <A HREF="../../../../../org/apache/tools/ant/ProjectComponent.html#location">location</A>, <A HREF="../../../../../org/apache/tools/ant/ProjectComponent.html#project">project</A></CODE></TD>
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<A NAME="constructor_summary"></A>
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<B>Constructor Summary</B></FONT></TH>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../../../../../org/apache/tools/ant/taskdefs/Parallel.html#Parallel()">Parallel</A></B>()</CODE>

<A NAME="method_summary"></A>
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<B>Method Summary</B></FONT></TH>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tools/ant/taskdefs/Parallel.html#addDaemons(org.apache.tools.ant.taskdefs.Parallel.TaskList)">addDaemons</A></B>(<A HREF="../../../../../org/apache/tools/ant/taskdefs/Parallel.TaskList.html" title="class in org.apache.tools.ant.taskdefs">Parallel.TaskList</A>&nbsp;daemonTasks)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Add a group of daemon threads</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tools/ant/taskdefs/Parallel.html#addTask(org.apache.tools.ant.Task)">addTask</A></B>(<A HREF="../../../../../org/apache/tools/ant/Task.html" title="class in org.apache.tools.ant">Task</A>&nbsp;nestedTask)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Add a nested task to execute in parallel.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tools/ant/taskdefs/Parallel.html#execute()">execute</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Execute the parallel tasks</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tools/ant/taskdefs/Parallel.html#setFailOnAny(boolean)">setFailOnAny</A></B>(boolean&nbsp;failOnAny)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Control whether a failure in a nested task halts execution.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tools/ant/taskdefs/Parallel.html#setPollInterval(int)">setPollInterval</A></B>(int&nbsp;pollInterval)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Interval to poll for completed threads when threadCount or
 threadsPerProcessor is specified.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tools/ant/taskdefs/Parallel.html#setThreadCount(int)">setThreadCount</A></B>(int&nbsp;numThreads)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Statically determine the maximum number of tasks to execute
 simultaneously.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tools/ant/taskdefs/Parallel.html#setThreadsPerProcessor(int)">setThreadsPerProcessor</A></B>(int&nbsp;numThreadsPerProcessor)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Dynamically generates the number of threads to execute based on the
 number of available processors (via
 <code>java.lang.Runtime.availableProcessors()</code>).</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tools/ant/taskdefs/Parallel.html#setTimeout(long)">setTimeout</A></B>(long&nbsp;timeout)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sets the timeout on this set of tasks.</TD>
</TR>
</TABLE>
&nbsp;<A NAME="methods_inherited_from_class_org.apache.tools.ant.Task"></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Methods inherited from class org.apache.tools.ant.<A HREF="../../../../../org/apache/tools/ant/Task.html" title="class in org.apache.tools.ant">Task</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/Task.html#bindToOwner(org.apache.tools.ant.Task)">bindToOwner</A>, <A HREF="../../../../../org/apache/tools/ant/Task.html#getOwningTarget()">getOwningTarget</A>, <A HREF="../../../../../org/apache/tools/ant/Task.html#getRuntimeConfigurableWrapper()">getRuntimeConfigurableWrapper</A>, <A HREF="../../../../../org/apache/tools/ant/Task.html#getTaskName()">getTaskName</A>, <A HREF="../../../../../org/apache/tools/ant/Task.html#getTaskType()">getTaskType</A>, <A HREF="../../../../../org/apache/tools/ant/Task.html#getWrapper()">getWrapper</A>, <A HREF="../../../../../org/apache/tools/ant/Task.html#handleErrorFlush(java.lang.String)">handleErrorFlush</A>, <A HREF="../../../../../org/apache/tools/ant/Task.html#handleErrorOutput(java.lang.String)">handleErrorOutput</A>, <A HREF="../../../../../org/apache/tools/ant/Task.html#handleFlush(java.lang.String)">handleFlush</A>, <A HREF="../../../../../org/apache/tools/ant/Task.html#handleInput(byte[], int, int)">handleInput</A>, <A HREF="../../../../../org/apache/tools/ant/Task.html#handleOutput(java.lang.String)">handleOutput</A>, <A HREF="../../../../../org/apache/tools/ant/Task.html#init()">init</A>, <A HREF="../../../../../org/apache/tools/ant/Task.html#isInvalid()">isInvalid</A>, <A HREF="../../../../../org/apache/tools/ant/Task.html#log(java.lang.String)">log</A>, <A HREF="../../../../../org/apache/tools/ant/Task.html#log(java.lang.String, int)">log</A>, <A HREF="../../../../../org/apache/tools/ant/Task.html#log(java.lang.String, java.lang.Throwable, int)">log</A>, <A HREF="../../../../../org/apache/tools/ant/Task.html#log(java.lang.Throwable, int)">log</A>, <A HREF="../../../../../org/apache/tools/ant/Task.html#maybeConfigure()">maybeConfigure</A>, <A HREF="../../../../../org/apache/tools/ant/Task.html#perform()">perform</A>, <A HREF="../../../../../org/apache/tools/ant/Task.html#reconfigure()">reconfigure</A>, <A HREF="../../../../../org/apache/tools/ant/Task.html#setOwningTarget(org.apache.tools.ant.Target)">setOwningTarget</A>, <A HREF="../../../../../org/apache/tools/ant/Task.html#setRuntimeConfigurableWrapper(org.apache.tools.ant.RuntimeConfigurable)">setRuntimeConfigurableWrapper</A>, <A HREF="../../../../../org/apache/tools/ant/Task.html#setTaskName(java.lang.String)">setTaskName</A>, <A HREF="../../../../../org/apache/tools/ant/Task.html#setTaskType(java.lang.String)">setTaskType</A></CODE></TD>
</TR>
</TABLE>
&nbsp;<A NAME="methods_inherited_from_class_org.apache.tools.ant.ProjectComponent"></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Methods inherited from class org.apache.tools.ant.<A HREF="../../../../../org/apache/tools/ant/ProjectComponent.html" title="class in org.apache.tools.ant">ProjectComponent</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/ProjectComponent.html#clone()">clone</A>, <A HREF="../../../../../org/apache/tools/ant/ProjectComponent.html#getDescription()">getDescription</A>, <A HREF="../../../../../org/apache/tools/ant/ProjectComponent.html#getLocation()">getLocation</A>, <A HREF="../../../../../org/apache/tools/ant/ProjectComponent.html#getProject()">getProject</A>, <A HREF="../../../../../org/apache/tools/ant/ProjectComponent.html#setDescription(java.lang.String)">setDescription</A>, <A HREF="../../../../../org/apache/tools/ant/ProjectComponent.html#setLocation(org.apache.tools.ant.Location)">setLocation</A>, <A HREF="../../../../../org/apache/tools/ant/ProjectComponent.html#setProject(org.apache.tools.ant.Project)">setProject</A></CODE></TD>
</TR>
</TABLE>
&nbsp;<A NAME="methods_inherited_from_class_java.lang.Object"></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Methods inherited from class java.lang.Object</B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE>equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD>
</TR>
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<A NAME="constructor_detail"></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
<B>Constructor Detail</B></FONT></TH>
</TR>
</TABLE>

<A NAME="Parallel()"></A><H3>
Parallel</H3>
<PRE>
public <B>Parallel</B>()</PRE>
<DL>
</DL>

<A NAME="method_detail"></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
<B>Method Detail</B></FONT></TH>
</TR>
</TABLE>

<A NAME="addDaemons(org.apache.tools.ant.taskdefs.Parallel.TaskList)"></A><H3>
addDaemons</H3>
<PRE>
public void <B>addDaemons</B>(<A HREF="../../../../../org/apache/tools/ant/taskdefs/Parallel.TaskList.html" title="class in org.apache.tools.ant.taskdefs">Parallel.TaskList</A>&nbsp;daemonTasks)</PRE>
<DL>
<DD>Add a group of daemon threads
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>daemonTasks</CODE> - The tasks to be executed as daemon.</DL>
</DD>
</DL>
<HR>

<A NAME="setPollInterval(int)"></A><H3>
setPollInterval</H3>
<PRE>
public void <B>setPollInterval</B>(int&nbsp;pollInterval)</PRE>
<DL>
<DD>Interval to poll for completed threads when threadCount or
 threadsPerProcessor is specified.  Integer in milliseconds.; optional
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>pollInterval</CODE> - New value of property pollInterval.</DL>
</DD>
</DL>
<HR>

<A NAME="setFailOnAny(boolean)"></A><H3>
setFailOnAny</H3>
<PRE>
public void <B>setFailOnAny</B>(boolean&nbsp;failOnAny)</PRE>
<DL>
<DD>Control whether a failure in a nested task halts execution. Note that
 the task will complete but existing threads will continue to run - they
 are not stopped
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>failOnAny</CODE> - if true any nested task failure causes parallel to
        complete.</DL>
</DD>
</DL>
<HR>

<A NAME="addTask(org.apache.tools.ant.Task)"></A><H3>
addTask</H3>
<PRE>
public void <B>addTask</B>(<A HREF="../../../../../org/apache/tools/ant/Task.html" title="class in org.apache.tools.ant">Task</A>&nbsp;nestedTask)</PRE>
<DL>
<DD>Add a nested task to execute in parallel.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/tools/ant/TaskContainer.html#addTask(org.apache.tools.ant.Task)">addTask</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/tools/ant/TaskContainer.html" title="interface in org.apache.tools.ant">TaskContainer</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>nestedTask</CODE> - Nested task to be executed in parallel</DL>
</DD>
</DL>
<HR>

<A NAME="setThreadsPerProcessor(int)"></A><H3>
setThreadsPerProcessor</H3>
<PRE>
public void <B>setThreadsPerProcessor</B>(int&nbsp;numThreadsPerProcessor)</PRE>
<DL>
<DD>Dynamically generates the number of threads to execute based on the
 number of available processors (via
 <code>java.lang.Runtime.availableProcessors()</code>).
 Will overwrite the value set in threadCount; optional
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>numThreadsPerProcessor</CODE> - Number of threads to create per available
        processor.</DL>
</DD>
</DL>
<HR>

<A NAME="setThreadCount(int)"></A><H3>
setThreadCount</H3>
<PRE>
public void <B>setThreadCount</B>(int&nbsp;numThreads)</PRE>
<DL>
<DD>Statically determine the maximum number of tasks to execute
 simultaneously.  If there are less tasks than threads then all will be
 executed at once, if there are more then only <code>threadCount</code>
 tasks will be executed at one time.  If <code>threadsPerProcessor</code>
 is set then this value is
 ignored.; optional
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>numThreads</CODE> - total number of threads.</DL>
</DD>
</DL>
<HR>

<A NAME="setTimeout(long)"></A><H3>
setTimeout</H3>
<PRE>
public void <B>setTimeout</B>(long&nbsp;timeout)</PRE>
<DL>
<DD>Sets the timeout on this set of tasks. If the timeout is reached
 before the other threads complete, the execution of this
 task completes with an exception.

Note that existing threads continue to run.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>timeout</CODE> - timeout in milliseconds.</DL>
</DD>
</DL>
<HR>

<A NAME="execute()"></A><H3>
execute</H3>
<PRE>
public void <B>execute</B>()
             throws <A HREF="../../../../../org/apache/tools/ant/BuildException.html" title="class in org.apache.tools.ant">BuildException</A></PRE>
<DL>
<DD>Execute the parallel tasks
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../../../org/apache/tools/ant/Task.html#execute()">execute</A></CODE> in class <CODE><A HREF="../../../../../org/apache/tools/ant/Task.html" title="class in org.apache.tools.ant">Task</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../../org/apache/tools/ant/BuildException.html" title="class in org.apache.tools.ant">BuildException</A></CODE> - if any of the threads failed.</DL>
</DD>
</DL>

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