| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"></meta><title>ReaderLookup</title><link rel="stylesheet" href="../../../../../css/component-usage.css" type="text/css"></link></head><script type="text/javascript">window.onload = function(){if(self==top) { document.getElementById('nameHeader').style.display = "inherit"; } }</script><body><h1 id="nameHeader" style="display: none;">ReaderLookup</h1><h2>Description: </h2><p>Provides a RecordReaderFactory that can be used to dynamically select another RecordReaderFactory. This will allow multiple RecordReaderFactories to be defined and registered, and then selected dynamically at runtime by referencing a FlowFile attribute in the Service to Use property.</p><h3>Tags: </h3><p>lookup, parse, record, row, reader</p><h3>Properties: </h3><p>In the list below, the names of required properties appear in <strong>bold</strong>. Any other properties (not in bold) are considered optional. The table also indicates any default values, and whether a property supports the <a href="../../../../../html/expression-language-guide.html">NiFi Expression Language</a>.</p><table id="properties"><tr><th>Display Name</th><th>API Name</th><th>Default Value</th><th>Allowable Values</th><th>Description</th></tr><tr><td id="name"><strong>Service to Use</strong></td><td>Service to Use</td><td id="default-value">${recordreader.name}</td><td id="allowable-values"></td><td id="description">Specifies the name of the user-defined property whose associated Controller Service should be used.<br/><strong>Supports Expression Language: true (will be evaluated using flow file attributes and variable registry)</strong></td></tr></table><h3>Dynamic Properties: </h3><p>Supports Sensitive Dynamic Properties: <strong>No</strong></p><p>Dynamic Properties allow the user to specify both the name and value of a property.<table id="dynamic-properties"><tr><th>Name</th><th>Value</th><th>Description</th></tr><tr><td id="name">Name of the RecordReader</td><td id="value">A RecordReaderFactory controller service</td><td><br/><strong>Supports Expression Language: false</strong></td></tr></table></p><h3>State management: </h3>This component does not store state.<h3>Restricted: </h3>This component is not restricted.<h3>System Resource Considerations:</h3>None specified.<h3>See Also:</h3><p><a href="../org.apache.nifi.lookup.RecordSetWriterLookup/index.html">RecordSetWriterLookup</a></p></body></html> |