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POHow to index pdf's content with SolrJ?
 

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  1. POHow to index pdf's content with SolrJ?
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    <p>I'm trying to index a few pdf documents using SolrJ as described at <a href="http://wiki.apache.org/solr/ContentStreamUpdateRequestExample" rel="nofollow">http://wiki.apache.org/solr/ContentStreamUpdateRequestExample</a>, below there's the code:</p> <pre><code>import static org.apache.solr.handler.extraction.ExtractingParams.LITERALS_PREFIX; import static org.apache.solr.handler.extraction.ExtractingParams.MAP_PREFIX; import static org.apache.solr.handler.extraction.ExtractingParams.UNKNOWN_FIELD_PREFIX; import org.apache.solr.client.solrj.SolrServer; import org.apache.solr.client.solrj.SolrServerException; import org.apache.solr.client.solrj.impl.CommonsHttpSolrServer; import org.apache.solr.client.solrj.request.AbstractUpdateRequest; import org.apache.solr.client.solrj.request.ContentStreamUpdateRequest; import org.apache.solr.common.util.NamedList; ... public static void indexFilesSolrCell(String fileName) throws IOException, SolrServerException { String urlString = "http://localhost:8080/solr"; SolrServer server = new CommonsHttpSolrServer(urlString); ContentStreamUpdateRequest up = new ContentStreamUpdateRequest("/update/extract"); up.addFile(new File(fileName)); String id = fileName.substring(fileName.lastIndexOf('/')+1); System.out.println(id); up.setParam(LITERALS_PREFIX + "id", id); up.setParam(LITERALS_PREFIX + "location", fileName); // this field doesn't exists in schema.xml, it'll be created as attr_location up.setParam(UNKNOWN_FIELD_PREFIX, "attr_"); up.setParam(MAP_PREFIX + "content", "attr_content"); up.setAction(AbstractUpdateRequest.ACTION.COMMIT, true, true); NamedList&lt;Object&gt; request = server.request(up); for(Entry&lt;String, Object&gt; entry : request){ System.out.println(entry.getKey()); System.out.println(entry.getValue()); } } </code></pre> <p>Unfortunately when querying for *:* I get the list of indexed documents but the content field is empty. How can I change the code above to extract also the document's content?</p> <p>Below there's the xml frament that describes <a href="http://www.objectmentor.com/resources/articles/lsp.pdf" rel="nofollow">this document</a>:</p> <pre><code>&lt;doc&gt; &lt;arr name="attr_content"&gt; &lt;str&gt; &lt;/str&gt; &lt;/arr&gt; &lt;arr name="attr_location"&gt; &lt;str&gt;/home/alex/Documents/lsp.pdf&lt;/str&gt; &lt;/arr&gt; &lt;arr name="attr_meta"&gt; &lt;str&gt;stream_size&lt;/str&gt; &lt;str&gt;31203&lt;/str&gt; &lt;str&gt;Content-Type&lt;/str&gt; &lt;str&gt;application/pdf&lt;/str&gt; &lt;/arr&gt; &lt;arr name="attr_stream_size"&gt; &lt;str&gt;31203&lt;/str&gt; &lt;/arr&gt; &lt;arr name="content_type"&gt; &lt;str&gt;application/pdf&lt;/str&gt; &lt;/arr&gt; &lt;str name="id"&gt;lsp.pdf&lt;/str&gt; &lt;/doc&gt; </code></pre> <p>I don't think that this problem is related to an incorrect installation of Apache Tika, because previously I had a few ServerException but now I've installed the required jars in the correct path. Moreover I've tried to index a txt file using the same class but the <strong>attr_content</strong> field is always empty.</p>
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