| /* |
| * 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 org.apache.solr.request; |
| |
| import org.apache.solr.common.util.NamedList; |
| import org.apache.solr.core.SolrInfoBean; |
| import org.apache.solr.response.SolrQueryResponse; |
| |
| /** |
| * Implementations of <code>SolrRequestHandler</code> are called to handle query requests. |
| * |
| * Different <code>SolrRequestHandler</code>s are registered with the <code>SolrCore</code>. |
| * One way to register a SolrRequestHandler with the core is through the <code>solrconfig.xml</code> file. |
| * <p> |
| * Example <code>solrconfig.xml</code> entry to register a <code>SolrRequestHandler</code> implementation to |
| * handle all queries with a Request Handler of "/test": |
| * <p> |
| * <code> |
| * <requestHandler name="/test" class="solr.tst.TestRequestHandler" /> |
| * </code> |
| * <p> |
| * A single instance of any registered SolrRequestHandler is created |
| * via the default constructor and is reused for all relevant queries. |
| * |
| * |
| */ |
| public interface SolrRequestHandler extends SolrInfoBean { |
| |
| /** <code>init</code> will be called just once, immediately after creation. |
| * <p>The args are user-level initialization parameters that |
| * may be specified when declaring a request handler in |
| * solrconfig.xml |
| */ |
| public void init(@SuppressWarnings({"rawtypes"})NamedList args); |
| |
| |
| /** |
| * Handles a query request, this method must be thread safe. |
| * <p> |
| * Information about the request may be obtained from <code>req</code> and |
| * response information may be set using <code>rsp</code>. |
| * <p> |
| * There are no mandatory actions that handleRequest must perform. |
| * An empty handleRequest implementation would fulfill |
| * all interface obligations. |
| */ |
| public void handleRequest(SolrQueryRequest req, SolrQueryResponse rsp); |
| |
| public static final String TYPE = "requestHandler"; |
| } |
| |