mirror of https://github.com/apache/lucene.git
SOLR-9337: Add fetch Streaming Expression
This commit is contained in:
Joel Bernstein
parent
4fe3110e49
commit
ee3f9e1e05
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@ -137,6 +137,7 @@ public class StreamHandler extends RequestHandlerBase implements SolrCoreAware,
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.withFunctionName("scoreNodes", ScoreNodesStream.class)
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.withFunctionName("model", ModelStream.class)
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.withFunctionName("classify", ClassifyStream.class)
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.withFunctionName("fetch", FetchStream.class)
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// metrics
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.withFunctionName("min", MinMetric.class)
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@ -0,0 +1,314 @@
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/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.solr.client.solrj.io.stream;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.Iterator;
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import java.util.List;
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import java.util.Locale;
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import java.util.Map;
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import java.util.HashMap;
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import org.apache.solr.client.solrj.io.Tuple;
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import org.apache.solr.client.solrj.io.comp.StreamComparator;
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import org.apache.solr.client.solrj.io.stream.expr.Explanation;
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import org.apache.solr.client.solrj.io.stream.expr.Explanation.ExpressionType;
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import org.apache.solr.client.solrj.io.stream.expr.Expressible;
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import org.apache.solr.client.solrj.io.stream.expr.StreamExplanation;
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import org.apache.solr.client.solrj.io.stream.expr.StreamExpression;
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import org.apache.solr.client.solrj.io.stream.expr.StreamExpressionNamedParameter;
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import org.apache.solr.client.solrj.io.stream.expr.StreamExpressionValue;
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import org.apache.solr.client.solrj.io.stream.expr.StreamFactory;
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import org.apache.solr.common.params.ModifiableSolrParams;
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/**
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* Iterates over a stream and fetches additional fields from a specified collection.
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* Fetches are done in batches.
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*
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* Syntax:
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*
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* fetch(collection, stream, on="a=b", fl="c,d,e", batchSize="50")
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*
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**/
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public class FetchStream extends TupleStream implements Expressible {
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private static final long serialVersionUID = 1;
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protected String zkHost;
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private TupleStream stream;
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private StreamContext streamContext;
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private Iterator<Tuple> tuples;
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private String leftKey;
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private String rightKey;
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private String fieldList;
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private String[] fields;
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private String collection;
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private int batchSize;
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private boolean appendVersion = true;
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private boolean appendKey = true;
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public FetchStream(String zkHost, String collection, TupleStream tupleStream, String on, String fieldList, int batchSize) throws IOException {
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init(zkHost, collection, tupleStream, on, fieldList, batchSize);
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}
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public FetchStream(StreamExpression expression, StreamFactory factory) throws IOException {
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// grab all parameters out
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String collectionName = factory.getValueOperand(expression, 0);
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List<StreamExpression> streamExpressions = factory.getExpressionOperandsRepresentingTypes(expression, Expressible.class, TupleStream.class);
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StreamExpressionNamedParameter onParam = factory.getNamedOperand(expression, "on");
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StreamExpressionNamedParameter flParam = factory.getNamedOperand(expression, "fl");
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StreamExpressionNamedParameter batchSizeParam = factory.getNamedOperand(expression, "batchSize");
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StreamExpressionNamedParameter zkHostExpression = factory.getNamedOperand(expression, "zkHost");
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String on = null;
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String fl = null;
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int batchSize = 50;
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if(onParam == null) {
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throw new IOException("on parameter cannot be null for the fetch expression");
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} else {
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on = ((StreamExpressionValue)onParam.getParameter()).getValue();
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}
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if(flParam == null) {
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throw new IOException("fl parameter cannot be null for the fetch expression");
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} else {
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fl = ((StreamExpressionValue)flParam.getParameter()).getValue();
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}
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if(batchSizeParam != null) {
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batchSize = Integer.parseInt(((StreamExpressionValue)batchSizeParam.getParameter()).getValue());
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}
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if(1 != streamExpressions.size()){
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throw new IOException(String.format(Locale.ROOT,"Invalid expression %s - expecting a single stream but found %d",expression, streamExpressions.size()));
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}
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TupleStream stream = factory.constructStream(streamExpressions.get(0));
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String zkHost = null;
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if(null == zkHostExpression){
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zkHost = factory.getCollectionZkHost(collectionName);
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if(zkHost == null) {
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zkHost = factory.getDefaultZkHost();
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}
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}
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else if(zkHostExpression.getParameter() instanceof StreamExpressionValue){
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zkHost = ((StreamExpressionValue)zkHostExpression.getParameter()).getValue();
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}
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if(null == zkHost){
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throw new IOException(String.format(Locale.ROOT,"invalid expression %s - zkHost not found for collection '%s'",expression,collectionName));
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}
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init(zkHost, collectionName, stream, on, fl, batchSize);
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}
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private void init(String zkHost, String collection, TupleStream tupleStream, String on, String fieldList, int batchSize) throws IOException{
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this.zkHost = zkHost;
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this.collection = collection;
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this.stream = tupleStream;
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this.batchSize = batchSize;
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this.fields = fieldList.split(",");
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this.fieldList = fieldList;
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if(on.indexOf("=") > -1) {
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String[] leftright = on.split("=");
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leftKey = leftright[0].trim();
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rightKey = leftright[1].trim();
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} else {
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leftKey = rightKey = on;
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}
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for(int i=0; i<fields.length; i++) {
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fields[i] = fields[i].trim();
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if(fields[i].equals("_version_")) {
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appendVersion = false;
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}
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if(fields[i].equals(rightKey)) {
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appendKey = false;
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}
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}
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}
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@Override
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public StreamExpression toExpression(StreamFactory factory) throws IOException {
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return toExpression(factory, true);
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}
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private StreamExpression toExpression(StreamFactory factory, boolean includeStreams) throws IOException {
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// function name
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StreamExpression expression = new StreamExpression(factory.getFunctionName(this.getClass()));
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expression.addParameter(collection);
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expression.addParameter(new StreamExpressionNamedParameter("on", leftKey+"="+rightKey));
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expression.addParameter(new StreamExpressionNamedParameter("fl", fieldList));
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expression.addParameter(new StreamExpressionNamedParameter("batchSize", Integer.toString(batchSize)));
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// stream
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if(includeStreams) {
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if (stream instanceof Expressible) {
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expression.addParameter(((Expressible) stream).toExpression(factory));
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} else {
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throw new IOException("The FetchStream contains a non-expressible TupleStream - it cannot be converted to an expression");
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}
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}
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return expression;
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}
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@Override
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public Explanation toExplanation(StreamFactory factory) throws IOException {
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return new StreamExplanation(getStreamNodeId().toString())
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.withChildren(new Explanation[]{
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stream.toExplanation(factory)
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})
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.withFunctionName(factory.getFunctionName(this.getClass()))
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.withImplementingClass(this.getClass().getName())
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.withExpressionType(ExpressionType.STREAM_DECORATOR)
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.withExpression(toExpression(factory, false).toString());
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}
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public void setStreamContext(StreamContext streamContext) {
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this.streamContext = streamContext;
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this.stream.setStreamContext(streamContext);
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}
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public List<TupleStream> children() {
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List<TupleStream> l = new ArrayList();
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l.add(stream);
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return l;
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}
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public void open() throws IOException {
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tuples = new ArrayList().iterator();
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stream.open();
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}
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private void fetchBatch() throws IOException {
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Tuple EOFTuple = null;
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List<Tuple> batch = new ArrayList();
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for(int i=0; i<batchSize; i++) {
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Tuple tuple = stream.read();
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if(tuple.EOF) {
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EOFTuple = tuple;
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break;
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} else {
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batch.add(tuple);
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}
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}
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if(batch.size() > 0) {
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StringBuilder buf = new StringBuilder();
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buf.append(rightKey);
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buf.append(":(");
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for (int i = 0; i < batch.size(); i++) {
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if (i > 0) {
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buf.append(" ");
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}
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Tuple tuple = batch.get(i);
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String key = tuple.getString(leftKey);
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buf.append(key);
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}
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buf.append(")");
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ModifiableSolrParams params = new ModifiableSolrParams();
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params.add("q", buf.toString());
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params.add("fl", fieldList+appendFields());
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params.add("rows", Integer.toString(batchSize));
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params.add("sort", "_version_ desc");
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CloudSolrStream cloudSolrStream = new CloudSolrStream(zkHost, collection, params);
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StreamContext newContext = new StreamContext();
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newContext.setSolrClientCache(streamContext.getSolrClientCache());
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cloudSolrStream.setStreamContext(newContext);
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Map<String, Tuple> fetched = new HashMap();
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try {
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cloudSolrStream.open();
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while (true) {
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Tuple t = cloudSolrStream.read();
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if (t.EOF) {
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break;
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} else {
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String rightValue = t.getString(rightKey);
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fetched.put(rightValue, t);
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}
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}
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} finally {
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cloudSolrStream.close();
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}
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//Iterate the batch and add the fetched fields to the Tuples
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for (Tuple batchTuple : batch) {
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Tuple fetchedTuple = fetched.get(batchTuple.getString(leftKey));
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if(fetchedTuple !=null) {
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for (String field : fields) {
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Object value = fetchedTuple.get(field);
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if(value != null) {
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batchTuple.put(field, value);
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}
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}
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}
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}
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}
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if(EOFTuple != null) {
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batch.add(EOFTuple);
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}
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this.tuples = batch.iterator();
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}
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public void close() throws IOException {
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stream.close();
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}
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public Tuple read() throws IOException {
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if(!tuples.hasNext()) {
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fetchBatch();
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}
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return tuples.next();
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}
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public StreamComparator getStreamSort(){
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return stream.getStreamSort();
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}
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public int getCost() {
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return 0;
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}
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private String appendFields() {
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StringBuffer buf = new StringBuffer();
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if(appendKey) {
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buf.append(",");
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buf.append(rightKey);
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}
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if(appendVersion) {
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buf.append(",_version_");
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}
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return buf.toString();
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}
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}
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@ -717,6 +717,173 @@ public class StreamExpressionTest extends SolrCloudTestCase {
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}
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@Test
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public void testFetchStream() throws Exception {
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SolrClientCache solrClientCache = new SolrClientCache();
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new UpdateRequest()
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.add(id, "0", "a_s", "hello0", "a_i", "0", "a_f", "1", "subject", "blah blah blah 0")
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.add(id, "2", "a_s", "hello0", "a_i", "2", "a_f", "2", "subject", "blah blah blah 2")
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.add(id, "3", "a_s", "hello3", "a_i", "3", "a_f", "3", "subject", "blah blah blah 3")
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.add(id, "4", "a_s", "hello4", "a_i", "4", "a_f", "4", "subject", "blah blah blah 4")
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.add(id, "1", "a_s", "hello0", "a_i", "1", "a_f", "5", "subject", "blah blah blah 1")
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.add(id, "5", "a_s", "hello3", "a_i", "5", "a_f", "6", "subject", "blah blah blah 5")
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.add(id, "6", "a_s", "hello4", "a_i", "6", "a_f", "7", "subject", "blah blah blah 6")
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.add(id, "7", "a_s", "hello3", "a_i", "7", "a_f", "8", "subject", "blah blah blah 7")
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.add(id, "8", "a_s", "hello3", "a_i", "8", "a_f", "9", "subject", "blah blah blah 8")
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.add(id, "9", "a_s", "hello0", "a_i", "9", "a_f", "10", "subject", "blah blah blah 9")
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.commit(cluster.getSolrClient(), COLLECTION);
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TupleStream stream;
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List<Tuple> tuples;
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StreamFactory factory = new StreamFactory()
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.withCollectionZkHost(COLLECTION, cluster.getZkServer().getZkAddress())
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.withFunctionName("search", CloudSolrStream.class)
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.withFunctionName("fetch", FetchStream.class);
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stream = factory.constructStream("fetch("+COLLECTION+", search(" + COLLECTION + ", q=*:*, fl=\"id,a_s,a_i,a_f\", sort=\"a_f asc\"), on=\"id=a_i\", batchSize=\"2\", fl=\"subject\")");
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StreamContext context = new StreamContext();
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context.setSolrClientCache(solrClientCache);
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stream.setStreamContext(context);
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tuples = getTuples(stream);
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assert(tuples.size() == 10);
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Tuple t = tuples.get(0);
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assertTrue("blah blah blah 0".equals(t.getString("subject")));
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t = tuples.get(1);
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assertTrue("blah blah blah 2".equals(t.getString("subject")));
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t = tuples.get(2);
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assertTrue("blah blah blah 3".equals(t.getString("subject")));
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t = tuples.get(3);
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assertTrue("blah blah blah 4".equals(t.getString("subject")));
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t = tuples.get(4);
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assertTrue("blah blah blah 1".equals(t.getString("subject")));
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t = tuples.get(5);
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assertTrue("blah blah blah 5".equals(t.getString("subject")));
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t = tuples.get(6);
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assertTrue("blah blah blah 6".equals(t.getString("subject")));
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t = tuples.get(7);
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assertTrue("blah blah blah 7".equals(t.getString("subject")));
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t = tuples.get(8);
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assertTrue("blah blah blah 8".equals(t.getString("subject")));
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t = tuples.get(9);
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assertTrue("blah blah blah 9".equals(t.getString("subject")));
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//Change the batch size
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stream = factory.constructStream("fetch("+COLLECTION+", search(" + COLLECTION + ", q=*:*, fl=\"id,a_s,a_i,a_f\", sort=\"a_f asc\"), on=\"id=a_i\", batchSize=\"3\", fl=\"subject\")");
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context = new StreamContext();
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context.setSolrClientCache(solrClientCache);
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stream.setStreamContext(context);
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tuples = getTuples(stream);
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assert(tuples.size() == 10);
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t = tuples.get(0);
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assertTrue("blah blah blah 0".equals(t.getString("subject")));
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t = tuples.get(1);
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assertTrue("blah blah blah 2".equals(t.getString("subject")));
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t = tuples.get(2);
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assertTrue("blah blah blah 3".equals(t.getString("subject")));
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t = tuples.get(3);
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assertTrue("blah blah blah 4".equals(t.getString("subject")));
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t = tuples.get(4);
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assertTrue("blah blah blah 1".equals(t.getString("subject")));
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t = tuples.get(5);
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assertTrue("blah blah blah 5".equals(t.getString("subject")));
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t = tuples.get(6);
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assertTrue("blah blah blah 6".equals(t.getString("subject")));
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t = tuples.get(7);
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assertTrue("blah blah blah 7".equals(t.getString("subject")));
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t = tuples.get(8);
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assertTrue("blah blah blah 8".equals(t.getString("subject")));
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t = tuples.get(9);
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assertTrue("blah blah blah 9".equals(t.getString("subject")));
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solrClientCache.close();
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}
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@Test
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public void testParallelFetchStream() throws Exception {
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new UpdateRequest()
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.add(id, "0", "a_s", "hello0", "a_i", "0", "a_f", "1", "subject", "blah blah blah 0")
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.add(id, "2", "a_s", "hello0", "a_i", "2", "a_f", "2", "subject", "blah blah blah 2")
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.add(id, "3", "a_s", "hello3", "a_i", "3", "a_f", "3", "subject", "blah blah blah 3")
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.add(id, "4", "a_s", "hello4", "a_i", "4", "a_f", "4", "subject", "blah blah blah 4")
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.add(id, "1", "a_s", "hello0", "a_i", "1", "a_f", "5", "subject", "blah blah blah 1")
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.add(id, "5", "a_s", "hello3", "a_i", "5", "a_f", "6", "subject", "blah blah blah 5")
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.add(id, "6", "a_s", "hello4", "a_i", "6", "a_f", "7", "subject", "blah blah blah 6")
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.add(id, "7", "a_s", "hello3", "a_i", "7", "a_f", "8", "subject", "blah blah blah 7")
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.add(id, "8", "a_s", "hello3", "a_i", "8", "a_f", "9", "subject", "blah blah blah 8")
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.add(id, "9", "a_s", "hello0", "a_i", "9", "a_f", "10", "subject", "blah blah blah 9")
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.commit(cluster.getSolrClient(), COLLECTION);
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TupleStream stream;
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List<Tuple> tuples;
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StreamFactory factory = new StreamFactory()
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||||
.withCollectionZkHost(COLLECTION, cluster.getZkServer().getZkAddress())
|
||||
.withFunctionName("search", CloudSolrStream.class)
|
||||
.withFunctionName("parallel", ParallelStream.class)
|
||||
.withFunctionName("fetch", FetchStream.class);
|
||||
|
||||
stream = factory.constructStream("parallel("+COLLECTION+", workers=2, sort=\"a_f asc\", fetch("+COLLECTION+", search(" + COLLECTION + ", q=*:*, fl=\"id,a_s,a_i,a_f\", sort=\"a_f asc\", partitionKeys=\"id\"), on=\"id=a_i\", batchSize=\"2\", fl=\"subject\"))");
|
||||
tuples = getTuples(stream);
|
||||
|
||||
assert(tuples.size() == 10);
|
||||
Tuple t = tuples.get(0);
|
||||
assertTrue("blah blah blah 0".equals(t.getString("subject")));
|
||||
t = tuples.get(1);
|
||||
assertTrue("blah blah blah 2".equals(t.getString("subject")));
|
||||
t = tuples.get(2);
|
||||
assertTrue("blah blah blah 3".equals(t.getString("subject")));
|
||||
t = tuples.get(3);
|
||||
assertTrue("blah blah blah 4".equals(t.getString("subject")));
|
||||
t = tuples.get(4);
|
||||
assertTrue("blah blah blah 1".equals(t.getString("subject")));
|
||||
t = tuples.get(5);
|
||||
assertTrue("blah blah blah 5".equals(t.getString("subject")));
|
||||
t = tuples.get(6);
|
||||
assertTrue("blah blah blah 6".equals(t.getString("subject")));
|
||||
t = tuples.get(7);
|
||||
assertTrue("blah blah blah 7".equals(t.getString("subject")));
|
||||
t = tuples.get(8);
|
||||
assertTrue("blah blah blah 8".equals(t.getString("subject")));
|
||||
t = tuples.get(9);
|
||||
assertTrue("blah blah blah 9".equals(t.getString("subject")));
|
||||
|
||||
|
||||
stream = factory.constructStream("parallel("+COLLECTION+", workers=2, sort=\"a_f asc\", fetch("+COLLECTION+", search(" + COLLECTION + ", q=*:*, fl=\"id,a_s,a_i,a_f\", sort=\"a_f asc\", partitionKeys=\"id\"), on=\"id=a_i\", batchSize=\"3\", fl=\"subject\"))");
|
||||
tuples = getTuples(stream);
|
||||
|
||||
assert(tuples.size() == 10);
|
||||
t = tuples.get(0);
|
||||
assertTrue("blah blah blah 0".equals(t.getString("subject")));
|
||||
t = tuples.get(1);
|
||||
assertTrue("blah blah blah 2".equals(t.getString("subject")));
|
||||
t = tuples.get(2);
|
||||
assertTrue("blah blah blah 3".equals(t.getString("subject")));
|
||||
t = tuples.get(3);
|
||||
assertTrue("blah blah blah 4".equals(t.getString("subject")));
|
||||
t = tuples.get(4);
|
||||
assertTrue("blah blah blah 1".equals(t.getString("subject")));
|
||||
t = tuples.get(5);
|
||||
assertTrue("blah blah blah 5".equals(t.getString("subject")));
|
||||
t = tuples.get(6);
|
||||
assertTrue("blah blah blah 6".equals(t.getString("subject")));
|
||||
t = tuples.get(7);
|
||||
assertTrue("blah blah blah 7".equals(t.getString("subject")));
|
||||
t = tuples.get(8);
|
||||
assertTrue("blah blah blah 8".equals(t.getString("subject")));
|
||||
t = tuples.get(9);
|
||||
assertTrue("blah blah blah 9".equals(t.getString("subject")));
|
||||
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
@Test
|
||||
public void testDaemonStream() throws Exception {
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue