solandra.SolandraReopenComponent.java Source code

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Here is the source code for solandra.SolandraReopenComponent.java

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/**
 * Copyright 2010 T Jake Luciani
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */
package solandra;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;

import org.apache.log4j.Logger;
import org.apache.lucene.document.FieldSelector;
import org.apache.solr.handler.component.ResponseBuilder;
import org.apache.solr.handler.component.SearchComponent;
import org.apache.solr.highlight.SolrHighlighter;
import org.apache.solr.schema.SchemaField;
import org.apache.solr.search.DocIterator;
import org.apache.solr.search.DocList;

public class SolandraReopenComponent extends SearchComponent {

    private static final Logger logger = Logger.getLogger(SolandraReopenComponent.class);

    public String getDescription() {
        return "Reopens Lucandra readers";
    }

    public String getSource() {
        return null;
    }

    public String getSourceId() {
        return null;
    }

    public String getVersion() {
        return "1.0";
    }

    public void prepare(ResponseBuilder rb) throws IOException {

        //Fixme: this is quite hacky, but the only way to make it work
        //without altering solr. neeeds reopen!
        rb.req.getSearcher().getIndexReader().directory();
    }

    public void process(ResponseBuilder rb) throws IOException {

        DocList list = rb.getResults().docList;

        DocIterator it = list.iterator();

        List<Integer> docIds = new ArrayList<Integer>(list.size());
        while (it.hasNext())
            docIds.add(it.next());

        logger.debug("Fetching " + docIds.size() + " Docs");

        if (docIds.size() > 0) {

            List<byte[]> fieldFilter = null;
            Set<String> returnFields = rb.rsp.getReturnFields();
            if (returnFields != null) {

                // copy return fields list
                fieldFilter = new ArrayList<byte[]>(returnFields.size());
                for (String field : returnFields) {
                    fieldFilter.add(field.getBytes());
                }

                // add highlight fields
                SolrHighlighter highligher = rb.req.getCore().getHighlighter();
                if (highligher.isHighlightingEnabled(rb.req.getParams())) {
                    for (String field : highligher.getHighlightFields(rb.getQuery(), rb.req, null))
                        if (!returnFields.contains(field))
                            fieldFilter.add(field.getBytes());
                }
                // fetch unique key if one exists.
                SchemaField keyField = rb.req.getSearcher().getSchema().getUniqueKeyField();
                if (null != keyField)
                    if (!returnFields.contains(keyField))
                        fieldFilter.add(keyField.getName().getBytes());
            }

            FieldSelector selector = new SolandraFieldSelector(docIds, fieldFilter);

            rb.req.getSearcher().getReader().document(docIds.get(0), selector);

        }
    }

}