| /* |
| * 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.client.solrj.io.stream; |
| |
| import java.io.IOException; |
| import java.util.List; |
| import java.util.Locale; |
| |
| import org.apache.solr.client.solrj.io.Tuple; |
| import org.apache.solr.client.solrj.io.comp.StreamComparator; |
| import org.apache.solr.client.solrj.io.stream.expr.Explanation; |
| import org.apache.solr.client.solrj.io.stream.expr.Expressible; |
| import org.apache.solr.client.solrj.io.stream.expr.StreamExpression; |
| import org.apache.solr.client.solrj.io.stream.expr.StreamExpressionNamedParameter; |
| import org.apache.solr.client.solrj.io.stream.expr.StreamExpressionParameter; |
| import org.apache.solr.client.solrj.io.stream.expr.StreamExpressionValue; |
| import org.apache.solr.client.solrj.io.stream.expr.StreamFactory; |
| import org.apache.solr.common.params.CommonParams; |
| import org.apache.solr.common.params.ModifiableSolrParams; |
| |
| /** |
| * Connects to Zookeeper to pick replicas from a specific collection to send the query to. |
| * Under the covers the SolrStream instances send the query to the replicas. |
| * SolrStreams are opened using a thread pool, but a single thread is used |
| * to iterate and merge Tuples from each SolrStream. |
| * @since 5.1.0 |
| **/ |
| |
| public class SearchFacadeStream extends TupleStream implements Expressible { |
| |
| private static final long serialVersionUID = 1; |
| private TupleStream innerStream; |
| |
| public SearchFacadeStream(StreamExpression expression, StreamFactory factory) throws IOException{ |
| // grab all parameters out |
| String collectionName = factory.getValueOperand(expression, 0); |
| |
| //Handle comma delimited list of collections. |
| if(collectionName.indexOf('"') > -1) { |
| collectionName = collectionName.replaceAll("\"", "").replaceAll(" ", ""); |
| } |
| |
| List<StreamExpressionNamedParameter> namedParams = factory.getNamedOperands(expression); |
| StreamExpressionNamedParameter zkHostExpression = factory.getNamedOperand(expression, "zkHost"); |
| |
| // Collection Name |
| if(null == collectionName){ |
| throw new IOException(String.format(Locale.ROOT,"invalid expression %s - collectionName expected as first operand",expression)); |
| } |
| |
| |
| ModifiableSolrParams mParams = new ModifiableSolrParams(); |
| for(StreamExpressionNamedParameter namedParam : namedParams){ |
| if(!namedParam.getName().equals("zkHost") && !namedParam.getName().equals("aliases")){ |
| mParams.add(namedParam.getName(), namedParam.getParameter().toString().trim()); |
| } |
| } |
| |
| // zkHost, optional - if not provided then will look into factory list to get |
| String zkHost = null; |
| if(null == zkHostExpression){ |
| zkHost = factory.getCollectionZkHost(collectionName); |
| if(zkHost == null) { |
| zkHost = factory.getDefaultZkHost(); |
| } |
| } |
| else if(zkHostExpression.getParameter() instanceof StreamExpressionValue){ |
| zkHost = ((StreamExpressionValue)zkHostExpression.getParameter()).getValue(); |
| } |
| /* |
| if(null == zkHost){ |
| throw new IOException(String.format(Locale.ROOT,"invalid expression %s - zkHost not found for collection '%s'",expression,collectionName)); |
| } |
| */ |
| |
| if(mParams.get(CommonParams.QT) != null && mParams.get(CommonParams.QT).equals("/export")) { |
| CloudSolrStream cloudSolrStream = new CloudSolrStream(); |
| cloudSolrStream.init(collectionName, zkHost, mParams); |
| this.innerStream = cloudSolrStream; |
| } else { |
| |
| if(mParams.get("partitionKeys") != null) { |
| throw new IOException("partitionKeys can only be used in the search function when the /export handler is specified"); |
| } |
| |
| SearchStream searchStream = new SearchStream(); |
| searchStream.init(zkHost, collectionName, mParams); |
| this.innerStream = searchStream; |
| } |
| } |
| |
| @Override |
| public StreamExpressionParameter toExpression(StreamFactory factory) throws IOException { |
| return ((Expressible)innerStream).toExpression(factory); |
| } |
| |
| @Override |
| public Explanation toExplanation(StreamFactory factory) throws IOException { |
| return innerStream.toExplanation(factory); |
| } |
| |
| public void setStreamContext(StreamContext context) { |
| this.innerStream.setStreamContext(context); |
| } |
| |
| /** |
| * Opens the CloudSolrStream |
| * |
| ***/ |
| public void open() throws IOException { |
| innerStream.open(); |
| } |
| |
| public List<TupleStream> children() { |
| return innerStream.children(); |
| } |
| |
| /** |
| * Closes the CloudSolrStream |
| **/ |
| public void close() throws IOException { |
| innerStream.close(); |
| } |
| |
| |
| public Tuple read() throws IOException { |
| return innerStream.read(); |
| } |
| |
| public StreamComparator getStreamSort(){ |
| return innerStream.getStreamSort(); |
| } |
| } |