| /** |
| * 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.handler; |
| |
| import java.io.File; |
| |
| import org.apache.solr.common.SolrException; |
| import org.apache.solr.common.params.CommonParams; |
| import org.apache.solr.common.params.SolrParams; |
| import org.apache.solr.core.SolrCore; |
| import org.apache.solr.request.SolrQueryRequest; |
| import org.apache.solr.request.SolrRequestHandler; |
| import org.apache.solr.response.SolrQueryResponse; |
| |
| |
| /** |
| * Ping solr core |
| * |
| * @since solr 1.3 |
| */ |
| public class PingRequestHandler extends RequestHandlerBase |
| { |
| @Override |
| public void handleRequestBody(SolrQueryRequest req, SolrQueryResponse rsp) throws Exception |
| { |
| SolrParams params = req.getParams(); |
| SolrParams required = params.required(); |
| SolrCore core = req.getCore(); |
| |
| // Check if the service is available |
| String healthcheck = core.getSolrConfig().get("admin/healthcheck/text()", null ); |
| if( healthcheck != null && !new File(healthcheck).exists() ) { |
| throw new SolrException(SolrException.ErrorCode.SERVICE_UNAVAILABLE, "Service disabled", true); |
| } |
| |
| // Get the RequestHandler |
| String qt = required.get( CommonParams.QT ); |
| SolrRequestHandler handler = core.getRequestHandler( qt ); |
| if( handler == null ) { |
| throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, |
| "Unknown RequestHandler: "+qt ); |
| } |
| |
| // Execute the ping query and catch any possible exception |
| Throwable ex = null; |
| try { |
| SolrQueryResponse pingrsp = new SolrQueryResponse(); |
| core.execute(handler, req, pingrsp ); |
| ex = pingrsp.getException(); |
| } |
| catch( Throwable th ) { |
| ex = th; |
| } |
| |
| // Send an error or an 'OK' message (response code will be 200) |
| if( ex != null ) { |
| throw new SolrException(SolrException.ErrorCode.SERVER_ERROR, |
| "Ping query caused exception: "+ex.getMessage(), ex ); |
| } |
| rsp.add( "status", "OK" ); |
| } |
| |
| |
| //////////////////////// SolrInfoMBeans methods ////////////////////// |
| |
| @Override |
| public String getVersion() { |
| return "$Revision$"; |
| } |
| |
| @Override |
| public String getDescription() { |
| return "Reports application health to a load-balancer"; |
| } |
| |
| @Override |
| public String getSourceId() { |
| return "$Id$"; |
| } |
| |
| @Override |
| public String getSource() { |
| return "$URL$"; |
| } |
| } |