| /* |
| * 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.Collections; |
| import java.util.List; |
| import java.util.Locale; |
| import java.util.Map.Entry; |
| import java.util.Random; |
| import java.util.stream.Collectors; |
| |
| import org.apache.solr.client.solrj.impl.CloudSolrClient; |
| 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.Explanation.ExpressionType; |
| import org.apache.solr.client.solrj.io.stream.expr.Expressible; |
| import org.apache.solr.client.solrj.io.stream.expr.StreamExplanation; |
| 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.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; |
| import org.apache.solr.common.params.SolrParams; |
| |
| /** |
| * @since 7.0.0 |
| */ |
| public class SqlStream extends TupleStream implements Expressible { |
| |
| private static final long serialVersionUID = 1; |
| |
| protected String zkHost; |
| protected String collection; |
| protected SolrParams params; |
| protected transient CloudSolrClient cloudSolrClient; |
| protected transient TupleStream tupleStream; |
| protected transient StreamContext streamContext; |
| |
| /** |
| * @param zkHost Zookeeper ensemble connection string |
| * @param collectionName Name of the collection to operate on |
| * @param params Map<String, String> of parameter/value pairs |
| * @throws IOException Something went wrong |
| * <p> |
| * This form does not allow specifying multiple clauses, say "fq" clauses, use the form that |
| * takes a SolrParams. Transition code can call the preferred method that takes SolrParams |
| * by calling CloudSolrStream(zkHost, collectionName, |
| * new ModifiableSolrParams(SolrParams.toMultiMap(new NamedList(Map<String, String>))); |
| */ |
| public SqlStream(String zkHost, String collectionName, SolrParams params) throws IOException { |
| init(collectionName, zkHost, params); |
| } |
| |
| public SqlStream(StreamExpression expression, StreamFactory factory) throws IOException{ |
| // grab all parameters out |
| String collectionName = factory.getValueOperand(expression, 0); |
| List<StreamExpressionNamedParameter> namedParams = factory.getNamedOperands(expression); |
| StreamExpressionNamedParameter zkHostExpression = factory.getNamedOperand(expression, "zkHost"); |
| |
| // Collection Name |
| if(null == collectionName){ |
| collectionName = factory.getDefaultCollection(); |
| } |
| |
| // Named parameters - passed directly to solr as solrparams |
| if(0 == namedParams.size()){ |
| throw new IOException(String.format(Locale.ROOT,"invalid expression %s - at least one named parameter expected. eg. 'q=*:*'",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)); |
| } |
| */ |
| |
| // We've got all the required items |
| init(collectionName, zkHost, mParams); |
| } |
| |
| @Override |
| public StreamExpression toExpression(StreamFactory factory) throws IOException { |
| // functionName(collectionName, param1, param2, ..., paramN, sort="comp", [aliases="field=alias,..."]) |
| |
| // function name |
| StreamExpression expression = new StreamExpression(factory.getFunctionName(getClass())); |
| |
| // collection |
| expression.addParameter(collection); |
| |
| // parameters |
| |
| for (Entry<String, String[]> param : params) { |
| String value = String.join(",", param.getValue()); |
| |
| // SOLR-8409: This is a special case where the params contain a " character |
| // Do note that in any other BASE streams with parameters where a " might come into play |
| // that this same replacement needs to take place. |
| value = value.replace("\"", "\\\""); |
| |
| expression.addParameter(new StreamExpressionNamedParameter(param.getKey(), value)); |
| } |
| |
| // zkHost |
| expression.addParameter(new StreamExpressionNamedParameter("zkHost", zkHost)); |
| |
| return expression; |
| } |
| |
| @Override |
| public Explanation toExplanation(StreamFactory factory) throws IOException { |
| |
| StreamExplanation explanation = new StreamExplanation(getStreamNodeId().toString()); |
| |
| explanation.setFunctionName(factory.getFunctionName(this.getClass())); |
| explanation.setImplementingClass(this.getClass().getName()); |
| explanation.setExpressionType(ExpressionType.STREAM_SOURCE); |
| explanation.setExpression(toExpression(factory).toString()); |
| |
| // child is a datastore so add it at this point |
| StreamExplanation child = new StreamExplanation(getStreamNodeId() + "-datastore"); |
| child.setFunctionName(String.format(Locale.ROOT, "solr (%s)", collection)); |
| child.setImplementingClass("Solr/Lucene"); |
| child.setExpressionType(ExpressionType.DATASTORE); |
| |
| if(null != params){ |
| ModifiableSolrParams mParams = new ModifiableSolrParams(params); |
| child.setExpression(mParams.getMap().entrySet().stream().map(e -> String.format(Locale.ROOT, "%s=%s", e.getKey(), e.getValue())).collect(Collectors.joining(","))); |
| } |
| explanation.addChild(child); |
| |
| return explanation; |
| } |
| |
| protected void init(String collectionName, String zkHost, SolrParams params) throws IOException { |
| this.zkHost = zkHost; |
| this.collection = collectionName; |
| this.params = new ModifiableSolrParams(params); |
| |
| if (params.get("stmt") == null) { |
| throw new IOException("stmt param expected for sql function"); |
| } |
| } |
| |
| public void setStreamContext(StreamContext context) { |
| this.streamContext = context; |
| } |
| |
| public void open() throws IOException { |
| constructStream(); |
| tupleStream.open(); |
| } |
| |
| public List<TupleStream> children() { |
| return null; |
| } |
| |
| protected void constructStream() throws IOException { |
| try { |
| |
| List<String> shardUrls = getShards(this.zkHost, this.collection, this.streamContext); |
| Collections.shuffle(shardUrls, new Random()); |
| String url = shardUrls.get(0); |
| ModifiableSolrParams mParams = new ModifiableSolrParams(params); |
| mParams.add(CommonParams.QT, "/sql"); |
| this.tupleStream = new SolrStream(url, mParams); |
| if(streamContext != null) { |
| tupleStream.setStreamContext(streamContext); |
| } |
| } catch (Exception e) { |
| throw new IOException(e); |
| } |
| } |
| |
| public void close() throws IOException { |
| tupleStream.close(); |
| } |
| |
| /** Return the stream sort - ie, the order in which records are returned */ |
| public StreamComparator getStreamSort(){ |
| return null; |
| } |
| |
| public Tuple read() throws IOException { |
| return tupleStream.read(); |
| } |
| } |