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New Daemon node to call and monitor long running external commands

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Dave C-J
2014-12-24 21:51:17 +00:00
parent 4a0608d2e9
commit 3e21d7d730
5 changed files with 415 additions and 0 deletions
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utility/daemon/daemon.html Normal file
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<!--
Copyright 2014 IBM Corp.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<script type="text/x-red" data-template-name="daemon">
<div class="form-row">
<label for="node-input-command"><i class="fa fa-file"></i> Command</label>
<input type="text" id="node-input-command" placeholder="command">
</div>
<div class="form-row">
<label for="node-input-args"><i class="fa fa-list"></i> Args</label>
<input type="text" id="node-input-args" placeholder="space separated arguments">
</div>
<div class="form-row">
<label>&nbsp;</label>
<input type="checkbox" id="node-input-cr" style="display: inline-block; width: auto; vertical-align: top;">
<label for="node-input-cr" style="width: 70%;">Add [enter] to every message ?</label>
</div>
<div class="form-row">
<label>&nbsp;</label>
<input type="checkbox" id="node-input-redo" style="display: inline-block; width: auto; vertical-align: top;">
<label for="node-input-redo" style="width: 70%;">Relaunch command on exit or error ?</label>
</div>
<div class="form-row">
<label for="node-input-op"> and</label>
<select id="node-input-op" style='width:70%'>
<option value="string">format reply as a string</option>
<option value="buffer">leave reply as a buffer</option>
<option value="number">try to convert reply to a number</option>
</select>
</div>
<div class="form-row">
<label for="node-input-name"><i class="fa fa-tag"></i> Name</label>
<input type="text" id="node-input-name" placeholder="Name">
</div>
</script>
<script type="text/x-red" data-help-name="daemon">
<p>Calls out to a long running system command. Sends <b>msg.payload</b> to stdin of the process.</p>
<p>Provides 3 outputs... stdout, stderr, and return code , from the running command.</p>
<p>If the called program stops (i.e. a return code is produced), this node can attempt to restart the command.</p>
<p><b>Note :</b> when you stop Node-RED running we may not get a chance to kill the called program so it may remain running. You <i>may</i> have to kill it manually.</p>
</script>
<script type="text/javascript">
RED.nodes.registerType('daemon',{
category: 'advanced-function',
color:"darksalmon",
defaults: {
command: {value:"",required:true},
args: {value:""},
cr: {value:false},
redo: {value:true},
op: {value:"string"},
name: {value:""}
},
inputs:1,
outputs:3,
icon: "arrow-in.png",
align: "right",
label: function() {
return this.name||this.command;
},
labelStyle: function() {
return this.name?"node_label_italic":"";
}
});
</script>