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                      <meta name="author" value="Adam Murdoch">
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      <title>Apache Myrmidon - Introduction</title>
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    <a href="http://jakarta.apache.org"><img src="http://jakarta.apache.org/images/jakarta-logo.gif" align="left" border="0"/></a>
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          <td valign="bottom"><div align="right"><b><font size="+3" color="#525D76">Apache Myrmidon</font></b></div></td>
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                <p><strong>Myrmidon</strong></p>
    <ul>
          <li>      <a href="./index.html">Introduction</a>
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          <li>      <a href="./getinvolved.html">Get Involved</a>
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          <li>      <a href="./user.html">Building Myrmidon</a>
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          <li>      <a href="./todo.html">Todo List</a>
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      <p><strong>User Guide</strong></p>
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          <li>      <a href="./buildfile.html">Build file</a>
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          <li>      <a href="./vfs.html">Virtual File System</a>
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          <li>      <a href="./ant1compat.html">Ant1 Compatibility Layer</a>
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      <p><strong>Extending Ant</strong></p>
    <ul>
          <li>      <a href="./task.html">Task Writers HOWTO</a>
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          <li>      <a href="./classloader.html">ClassLoader HOWTO</a>
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          <li>      <a href="./librarys.html">Library HOWTO</a>
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      <p><strong>Container Design</strong></p>
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        <a name="What is Myrmidon?"><strong>What is Myrmidon?</strong></a>
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                        <p>
Myrmidon is one of the Ant 2 proposals currently in development.  You can
read more about the goals of Ant 2
<a href="http://jakarta.apache.org/ant/ant2/">here</a>.
</p>
                                <p>
Myrmidon is a general-purpose <i>task engine</i>.  It contains the basic
building blocks for assembling any sort of task-based tool.  Ant 2
is an example of such a tool, which could be assembled using the Myrmidon task
engine, and a library of build related tasks.
</p>
                                <p>
Currently, Myrmidon is a prototype of what a task engine might look.  It
includes a small set of tasks and data types.  We are currently porting
many of the Ant 1.x tasks to the Myrmidon task engine.
</p>
                                <p>
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        <a name="Differences to Ant 1.x"><strong>Differences to Ant 1.x</strong></a>
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      <blockquote>
                        <p>Some of the differences between Ant 1.x and Myrmidon:</p>
                                <ul>

<li>
Groups of tasks can be assembled into self-describing <i>antlib</i> task
libraries.  This makes it very easy to distribute and install tasks and data-types.
</li>

<li>
A project can import other projects, and reference their targets.
</li>

<li>
Changes to the property model:
<ul>
    <li>Properties and data type references now share the same namespace.</li>
    <li>Properties are mutable.</li>
    <li>Properties are scoped into global, local, and parent contexts.</li>
    <li><code>if</code> and <code>unless</code> checks now test the property
    value against <code>false</code>, in addition to testing set/not-set.</li>
</ul>
</li>

<li>
Changes to task and data-type API:
<ul>
    <li>An interface based API, through which a task interacts with the
    task engine, and the services it provides.</li>
    <li>A well-defined object lifecycle.</li>
    <li>Polymorphic types are supported when objects are configured.</li>
    <li>Reference handling is handled automatically when objects are configured.</li>
    <li>Aspects can be used to decorate tasks, to add facilities like logging,
    error handling, or user preferences.</li>
</ul>
</li>

<li>
A set of well-defined services and APIs have been introduced, to allow
tasks to do their work without depending on other tasks:
<ul>
    <li>Execute external commands.</li>
    <li>Execute other tasks.</li>
    <li>Manage ClassLoaders and Class-paths.</li>
    <li>Virtual file system (in progress).</li>
    <li>Execute Java applications (in progress).</li>
    <li>...</li>
</ul>
</li>

</ul>
                                <p>There are plenty more features planned.  You can read about them <a href="todo.html">here</a>.</p>
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          Copyright &#169; 2000-2002, Apache Software Foundation
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