2018-11-30 13:50:49 +01:00
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Copyright JS Foundation and other contributors, http://js.foundation
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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2020-01-15 03:40:48 +01:00
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<script type="text/html" data-help-name="inject">
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2018-11-30 13:50:49 +01:00
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<p>Injects a message into a flow either manually or at regular intervals. The message
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payload can be a variety of types, including strings, JavaScript objects or the current time.</p>
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<h3>Outputs</h3>
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<dl class="message-properties">
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<dt>payload<span class="property-type">various</span></dt>
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<dd>The configured payload of the message.</dd>
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<dt class="optional">topic <span class="property-type">string</span></dt>
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<dd>An optional property that can be configured in the node.</dd>
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</dl>
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<h3>Details</h3>
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<p>The Inject node can initiate a flow with a specific payload value.
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The default payload is a timestamp of the current time in millisecs since January 1st, 1970.</p>
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<p>The node also supports injecting strings, numbers, booleans, JavaScript objects, or flow/global context values.</p>
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<p>By default, the node is triggered manually by clicking on its button within the editor. It can also be set to
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inject at regular intervals or according to a schedule.</p>
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<p>It can also be configured to inject once each time the flows are started.</p>
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<p>The maximum <i>Interval</i> that can be specified is about 596 hours / 24 days. However if you are looking at intervals
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greater than one day you should consider using a scheduler node that can cope with power outages and restarts.</p>
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<p><b>Note</b>: The <i>"Interval between times"</i> and <i>"at a specific time"</i> options use the standard cron system.
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This means that 20 minutes will be at the next hour, 20 minutes past and 40 minutes past - not in 20 minutes time.
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If you want every 20 minutes from now - use the <i>"interval"</i> option.</p>
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<p><b>Note</b>: To include a newline in a string you must use a Function node to create the payload.</p>
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</script>
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