diff --git a/solr/solrj/src/java/org/apache/solr/client/solrj/io/stream/RandomStream.java b/solr/solrj/src/java/org/apache/solr/client/solrj/io/stream/RandomStream.java new file mode 100644 index 00000000000..3eb35c18618 --- /dev/null +++ b/solr/solrj/src/java/org/apache/solr/client/solrj/io/stream/RandomStream.java @@ -0,0 +1,211 @@ +/* + * 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.HashMap; +import java.util.ArrayList; +import java.util.List; +import java.util.Locale; +import java.util.Map; +import java.util.Map.Entry; +import java.util.Random; +import java.util.Iterator; + +import org.apache.solr.client.solrj.impl.CloudSolrClient; +import org.apache.solr.client.solrj.io.SolrClientCache; +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.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.client.solrj.request.QueryRequest; +import org.apache.solr.client.solrj.response.QueryResponse; +import org.apache.solr.common.SolrDocument; +import org.apache.solr.common.SolrDocumentList; +import org.apache.solr.common.params.ModifiableSolrParams; + +/** + * The RandomStream emits a stream of psuedo random Tuples that match the query parameters. Sample expression syntax: + * random(collection, q="Hello word", rows="50", fl="title, body") + **/ + +public class RandomStream extends TupleStream implements Expressible { + + private String zkHost; + private Map props; + private String collection; + protected transient SolrClientCache cache; + protected transient CloudSolrClient cloudSolrClient; + private Iterator documentIterator; + + public RandomStream(String zkHost, + String collection, + Map props) throws IOException { + init(zkHost, collection, props); + } + + public RandomStream(StreamExpression expression, StreamFactory factory) throws IOException{ + // grab all parameters out + String collectionName = factory.getValueOperand(expression, 0); + List 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)); + } + + // 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)); + } + + // pull out known named params + Map params = new HashMap(); + for(StreamExpressionNamedParameter namedParam : namedParams){ + if(!namedParam.getName().equals("zkHost") && !namedParam.getName().equals("buckets") && !namedParam.getName().equals("bucketSorts") && !namedParam.getName().equals("limit")){ + params.put(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(zkHost, collectionName, params); + } + + private void init(String zkHost, String collection, Map props) throws IOException { + this.zkHost = zkHost; + this.props = props; + this.collection = collection; + } + + @Override + public StreamExpressionParameter toExpression(StreamFactory factory) throws IOException { + // function name + StreamExpression expression = new StreamExpression(factory.getFunctionName(this.getClass())); + + // collection + expression.addParameter(collection); + + // parameters + for(Entry param : props.entrySet()){ + expression.addParameter(new StreamExpressionNamedParameter(param.getKey(), param.getValue())); + } + + // zkHost + expression.addParameter(new StreamExpressionNamedParameter("zkHost", zkHost)); + + return expression; + } + + + public void setStreamContext(StreamContext context) { + cache = context.getSolrClientCache(); + } + + public List children() { + List l = new ArrayList(); + return l; + } + + public void open() throws IOException { + if(cache != null) { + cloudSolrClient = cache.getCloudSolrClient(zkHost); + } else { + cloudSolrClient = new CloudSolrClient(zkHost); + } + + ModifiableSolrParams params = getParams(this.props); + + params.remove("sort"); //Override any sort. + + Random rand = new Random(); + int seed = rand.nextInt(); + + String sortField = "random_"+seed; + params.add("sort", sortField+" asc"); + + QueryRequest request = new QueryRequest(params); + try { + QueryResponse response = request.process(cloudSolrClient, collection); + SolrDocumentList docs = response.getResults(); + documentIterator = docs.iterator(); + } catch (Exception e) { + throw new IOException(e); + } + } + + public void close() throws IOException { + if(cache == null) { + cloudSolrClient.close(); + } + } + + public Tuple read() throws IOException { + if(documentIterator.hasNext()) { + Map map = new HashMap(); + SolrDocument doc = documentIterator.next(); + for(String key : doc.keySet()) { + map.put(key, doc.get(key)); + } + return new Tuple(map); + } else { + Map fields = new HashMap(); + fields.put("EOF", true); + Tuple tuple = new Tuple(fields); + return tuple; + } + } + + private ModifiableSolrParams getParams(Map props) { + ModifiableSolrParams params = new ModifiableSolrParams(); + for(String key : props.keySet()) { + String value = props.get(key); + params.add(key, value); + } + return params; + } + + public int getCost() { + return 0; + } + + @Override + public StreamComparator getStreamSort() { + return null; + } +} \ No newline at end of file diff --git a/solr/solrj/src/test-files/solrj/solr/collection1/conf/schema-streaming.xml b/solr/solrj/src/test-files/solrj/solr/collection1/conf/schema-streaming.xml index 7a7ee52a56d..575b6225331 100644 --- a/solr/solrj/src/test-files/solrj/solr/collection1/conf/schema-streaming.xml +++ b/solr/solrj/src/test-files/solrj/solr/collection1/conf/schema-streaming.xml @@ -51,6 +51,8 @@ + +