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<div id="right-sidebar"><div><div id="toc">
<h1 class="nopad">Table of Contents</h1>
<div style="margin-left: 1em;" class="toc-section">
<a href="#toc0">Overview</a>
<div style="margin-left: 1em;" class="toc-entry">
<a href="#dataflow/add-cell-watcher">add-cell-watcher</a>
</div><div style="margin-left: 1em;" class="toc-entry">
<a href="#dataflow/add-cells">add-cells</a>
</div><div style="margin-left: 1em;" class="toc-entry">
<a href="#dataflow/build-dataflow">build-dataflow</a>
</div><div style="margin-left: 1em;" class="toc-entry">
<a href="#dataflow/build-source-cell">build-source-cell</a>
</div><div style="margin-left: 1em;" class="toc-entry">
<a href="#dataflow/build-standard-cell">build-standard-cell</a>
</div><div style="margin-left: 1em;" class="toc-entry">
<a href="#dataflow/build-validator-cell">build-validator-cell</a>
</div><div style="margin-left: 1em;" class="toc-entry">
<a href="#dataflow/cell">cell</a>
</div><div style="margin-left: 1em;" class="toc-entry">
<a href="#dataflow/display-cell">display-cell</a>
</div><div style="margin-left: 1em;" class="toc-entry">
<a href="#dataflow/eval-cell">eval-cell</a>
</div><div style="margin-left: 1em;" class="toc-entry">
<a href="#dataflow/get-cell">get-cell</a>
</div><div style="margin-left: 1em;" class="toc-entry">
<a href="#dataflow/get-cells">get-cells</a>
</div><div style="margin-left: 1em;" class="toc-entry">
<a href="#dataflow/get-old-value">get-old-value</a>
</div><div style="margin-left: 1em;" class="toc-entry">
<a href="#dataflow/get-source-cells">get-source-cells</a>
</div><div style="margin-left: 1em;" class="toc-entry">
<a href="#dataflow/get-value">get-value</a>
</div><div style="margin-left: 1em;" class="toc-entry">
<a href="#dataflow/get-value-from-cell">get-value-from-cell</a>
</div><div style="margin-left: 1em;" class="toc-entry">
<a href="#dataflow/get-values">get-values</a>
</div><div style="margin-left: 1em;" class="toc-entry">
<a href="#dataflow/print-dataflow">print-dataflow</a>
</div><div style="margin-left: 1em;" class="toc-entry">
<a href="#dataflow/remove-cells">remove-cells</a>
</div><div style="margin-left: 1em;" class="toc-entry">
<a href="#dataflow/source-cell?">source-cell?</a>
</div><div style="margin-left: 1em;" class="toc-entry">
<a href="#dataflow/update-values">update-values</a>
</div>
<br />
</div>
</div>
</div></div>
<div id="content-tag"><div><h1 id="overview">API for <span id="namespace-name">dataflow</span></h1>
by <span id="author">Jeffrey Straszheim</span><br />
<br />Usage:
<pre>
(ns your-namespace
(:require <span id="long-name">clojure.contrib.dataflow</span>))
</pre><pre>
</pre><h2>Overview</h2>
<pre id="namespace-docstr">A library to support a dataflow model of state</pre>
<br />
<h2>Public Variables and Functions</h2>
<div id="var-entry">
<br />
<hr />
<h2 id="dataflow/add-cell-watcher">add-cell-watcher</h2>
<span id="var-type">function</span><br />
<pre id="var-usage">Usage: (add-cell-watcher cell key fun)
</pre>
<pre id="var-docstr">Adds a watcher to a cell to respond to changes of value. The is a
function of 4 values: a key, the cell, its old value, its new
value. This is implemented using Clojure's add-watch to the
underlying ref, and shared its sematics</pre>
<a href="http://github.com/richhickey/clojure-contrib/blob/4f2c7bb5cf6828eb710fd18b603828ab295d0fa5/src/clojure/contrib/dataflow.clj#L460" id="var-source">Source</a>
</div><div id="var-entry">
<br />
<hr />
<h2 id="dataflow/add-cells">add-cells</h2>
<span id="var-type">function</span><br />
<pre id="var-usage">Usage: (add-cells df cells)
</pre>
<pre id="var-docstr">Given a collection of cells, add them to the dataflow.</pre>
<a href="http://github.com/richhickey/clojure-contrib/blob/4f2c7bb5cf6828eb710fd18b603828ab295d0fa5/src/clojure/contrib/dataflow.clj#L210" id="var-source">Source</a>
</div><div id="var-entry">
<br />
<hr />
<h2 id="dataflow/build-dataflow">build-dataflow</h2>
<span id="var-type">function</span><br />
<pre id="var-usage">Usage: (build-dataflow cs)
</pre>
<pre id="var-docstr">Given a collection of cells, build and return a dataflow object</pre>
<a href="http://github.com/richhickey/clojure-contrib/blob/4f2c7bb5cf6828eb710fd18b603828ab295d0fa5/src/clojure/contrib/dataflow.clj#L188" id="var-source">Source</a>
</div><div id="var-entry">
<br />
<hr />
<h2 id="dataflow/build-source-cell">build-source-cell</h2>
<span id="var-type">function</span><br />
<pre id="var-usage">Usage: (build-source-cell name init)
</pre>
<pre id="var-docstr">Builds a source cell</pre>
<a href="http://github.com/richhickey/clojure-contrib/blob/4f2c7bb5cf6828eb710fd18b603828ab295d0fa5/src/clojure/contrib/dataflow.clj#L231" id="var-source">Source</a>
</div><div id="var-entry">
<br />
<hr />
<h2 id="dataflow/build-standard-cell">build-standard-cell</h2>
<span id="var-type">function</span><br />
<pre id="var-usage">Usage: (build-standard-cell name deps fun expr)
</pre>
<pre id="var-docstr">Builds a standard cell</pre>
<a href="http://github.com/richhickey/clojure-contrib/blob/4f2c7bb5cf6828eb710fd18b603828ab295d0fa5/src/clojure/contrib/dataflow.clj#L292" id="var-source">Source</a>
</div><div id="var-entry">
<br />
<hr />
<h2 id="dataflow/build-validator-cell">build-validator-cell</h2>
<span id="var-type">function</span><br />
<pre id="var-usage">Usage: (build-validator-cell deps fun expr)
</pre>
<pre id="var-docstr">Builds a validator cell</pre>
<a href="http://github.com/richhickey/clojure-contrib/blob/4f2c7bb5cf6828eb710fd18b603828ab295d0fa5/src/clojure/contrib/dataflow.clj#L298" id="var-source">Source</a>
</div><div id="var-entry">
<br />
<hr />
<h2 id="dataflow/cell">cell</h2>
<span id="var-type">macro</span><br />
<pre id="var-usage">Usage: (cell type & data)
</pre>
<pre id="var-docstr">Build a standard cell, like this:
(cell fred
(* ?mary ?joe))
Which creates a cell named fred that is the product of a cell mary and cell joe
Or:
(cell joe
(apply * ?*sally))
Which creates a cell that applies * to the collection of all cells named sally
Or:
(cell :source fred 0)
Which builds a source cell fred with initial value 0
Or:
(cell :validator (when (< ?fred ?sally)
(throwf "%s must be greater than %s" ?fred ?sally))
Which will perform the validation</pre>
<a href="http://github.com/richhickey/clojure-contrib/blob/4f2c7bb5cf6828eb710fd18b603828ab295d0fa5/src/clojure/contrib/dataflow.clj#L304" id="var-source">Source</a>
</div><div id="var-entry">
<br />
<hr />
<h2 id="dataflow/display-cell">display-cell</h2>
<span id="var-type">multimethod</span><br />
<pre id="var-usage">No usage documentation available</pre>
<pre id="var-docstr">A 'readable' form of the cell</pre>
<a href="http://github.com/richhickey/clojure-contrib/blob/4f2c7bb5cf6828eb710fd18b603828ab295d0fa5/src/clojure/contrib/dataflow.clj#L348" id="var-source">Source</a>
</div><div id="var-entry">
<br />
<hr />
<h2 id="dataflow/eval-cell">eval-cell</h2>
<span id="var-type">multimethod</span><br />
<pre id="var-usage">No usage documentation available</pre>
<pre id="var-docstr">Evaluate a dataflow cell. Return [changed, old val]</pre>
<a href="http://github.com/richhickey/clojure-contrib/blob/4f2c7bb5cf6828eb710fd18b603828ab295d0fa5/src/clojure/contrib/dataflow.clj#L372" id="var-source">Source</a>
</div><div id="var-entry">
<br />
<hr />
<h2 id="dataflow/get-cell">get-cell</h2>
<span id="var-type">function</span><br />
<pre id="var-usage">Usage: (get-cell df name)
</pre>
<pre id="var-docstr">Get the single cell named by name</pre>
<a href="http://github.com/richhickey/clojure-contrib/blob/4f2c7bb5cf6828eb710fd18b603828ab295d0fa5/src/clojure/contrib/dataflow.clj#L94" id="var-source">Source</a>
</div><div id="var-entry">
<br />
<hr />
<h2 id="dataflow/get-cells">get-cells</h2>
<span id="var-type">function</span><br />
<pre id="var-usage">Usage: (get-cells df name)
</pre>
<pre id="var-docstr">Get all the cells named by name</pre>
<a href="http://github.com/richhickey/clojure-contrib/blob/4f2c7bb5cf6828eb710fd18b603828ab295d0fa5/src/clojure/contrib/dataflow.clj#L89" id="var-source">Source</a>
</div><div id="var-entry">
<br />
<hr />
<h2 id="dataflow/get-old-value">get-old-value</h2>
<span id="var-type">function</span><br />
<pre id="var-usage">Usage: (get-old-value df env name)
</pre>
<pre id="var-docstr">Looks up an old value</pre>
<a href="http://github.com/richhickey/clojure-contrib/blob/4f2c7bb5cf6828eb710fd18b603828ab295d0fa5/src/clojure/contrib/dataflow.clj#L136" id="var-source">Source</a>
</div><div id="var-entry">
<br />
<hr />
<h2 id="dataflow/get-source-cells">get-source-cells</h2>
<span id="var-type">function</span><br />
<pre id="var-usage">Usage: (get-source-cells df)
</pre>
<pre id="var-docstr">Returns a collection of source cells from the dataflow</pre>
<a href="http://github.com/richhickey/clojure-contrib/blob/4f2c7bb5cf6828eb710fd18b603828ab295d0fa5/src/clojure/contrib/dataflow.clj#L108" id="var-source">Source</a>
</div><div id="var-entry">
<br />
<hr />
<h2 id="dataflow/get-value">get-value</h2>
<span id="var-type">function</span><br />
<pre id="var-usage">Usage: (get-value df name)
</pre>
<pre id="var-docstr">Gets a value from the df matching the passed symbol.
Signals an error if the name is not present, or if it not a single
value.</pre>
<a href="http://github.com/richhickey/clojure-contrib/blob/4f2c7bb5cf6828eb710fd18b603828ab295d0fa5/src/clojure/contrib/dataflow.clj#L115" id="var-source">Source</a>
</div><div id="var-entry">
<br />
<hr />
<h2 id="dataflow/get-value-from-cell">get-value-from-cell</h2>
<span id="var-type">function</span><br />
<pre id="var-usage">Usage: (get-value-from-cell cell)
</pre>
<pre id="var-docstr">Given a cell, get its value</pre>
<a href="http://github.com/richhickey/clojure-contrib/blob/4f2c7bb5cf6828eb710fd18b603828ab295d0fa5/src/clojure/contrib/dataflow.clj#L143" id="var-source">Source</a>
</div><div id="var-entry">
<br />
<hr />
<h2 id="dataflow/get-values">get-values</h2>
<span id="var-type">function</span><br />
<pre id="var-usage">Usage: (get-values df name)
</pre>
<pre id="var-docstr">Gets a collection of values from the df by name</pre>
<a href="http://github.com/richhickey/clojure-contrib/blob/4f2c7bb5cf6828eb710fd18b603828ab295d0fa5/src/clojure/contrib/dataflow.clj#L126" id="var-source">Source</a>
</div><div id="var-entry">
<br />
<hr />
<h2 id="dataflow/print-dataflow">print-dataflow</h2>
<span id="var-type">function</span><br />
<pre id="var-usage">Usage: (print-dataflow df)
</pre>
<pre id="var-docstr">Prints a dataflow, one cell per line</pre>
<a href="http://github.com/richhickey/clojure-contrib/blob/4f2c7bb5cf6828eb710fd18b603828ab295d0fa5/src/clojure/contrib/dataflow.clj#L199" id="var-source">Source</a>
</div><div id="var-entry">
<br />
<hr />
<h2 id="dataflow/remove-cells">remove-cells</h2>
<span id="var-type">function</span><br />
<pre id="var-usage">Usage: (remove-cells df cells)
</pre>
<pre id="var-docstr">Given a collection of cells, remove them from the dataflow.</pre>
<a href="http://github.com/richhickey/clojure-contrib/blob/4f2c7bb5cf6828eb710fd18b603828ab295d0fa5/src/clojure/contrib/dataflow.clj#L218" id="var-source">Source</a>
</div><div id="var-entry">
<br />
<hr />
<h2 id="dataflow/source-cell?">source-cell?</h2>
<span id="var-type">function</span><br />
<pre id="var-usage">Usage: (source-cell? cell)
</pre>
<pre id="var-docstr">Is this cell a source cell?</pre>
<a href="http://github.com/richhickey/clojure-contrib/blob/4f2c7bb5cf6828eb710fd18b603828ab295d0fa5/src/clojure/contrib/dataflow.clj#L103" id="var-source">Source</a>
</div><div id="var-entry">
<br />
<hr />
<h2 id="dataflow/update-values">update-values</h2>
<span id="var-type">function</span><br />
<pre id="var-usage">Usage: (update-values df data)
</pre>
<pre id="var-docstr">Given a dataflow, and a map of name-value pairs, update the
dataflow by binding the new values. Each name must be of a source
cell</pre>
<a href="http://github.com/richhickey/clojure-contrib/blob/4f2c7bb5cf6828eb710fd18b603828ab295d0fa5/src/clojure/contrib/dataflow.clj#L438" id="var-source">Source</a>
</div>
</div></div>
</div>
</div>
</div>
</div>
<div id="foot">
<div style="text-align: center;">
Copyright 2008-2009 Rich Hickey and the various contributors
</div>
</div>
</div>
<div id="DesignedBy">Logo & site design by <a title="Visit Tom Hickey's website." href="http://www.tomhickey.com">Tom Hickey</a>.</div>
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