| /* |
| * 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.lang.invoke.MethodHandles; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Locale; |
| import java.util.concurrent.ArrayBlockingQueue; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.TimeUnit; |
| |
| 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.util.ExecutorUtil; |
| import org.apache.solr.common.util.SolrNamedThreadFactory; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import static org.apache.solr.common.params.CommonParams.ID; |
| |
| /** |
| * The executor function wraps a stream with Tuples containing Streaming Expressions |
| * and executes them in parallel. Sample syntax: |
| * |
| * executor(thread=10, topic(storedExpressions, q="*:*", fl="expr_s, id", id="topic1")) |
| * |
| * The Streaming Expression to execute is taken from the expr field in the Tuples. |
| * @since 6.3.0 |
| */ |
| |
| public class ExecutorStream extends TupleStream implements Expressible { |
| |
| private static final Logger log = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass()); |
| |
| private TupleStream stream; |
| |
| private int threads; |
| |
| private ExecutorService executorService; |
| private StreamFactory streamFactory; |
| private StreamContext streamContext; |
| |
| public ExecutorStream(StreamExpression expression, StreamFactory factory) throws IOException { |
| // grab all parameters out |
| List<StreamExpression> streamExpressions = factory.getExpressionOperandsRepresentingTypes(expression, Expressible.class, TupleStream.class); |
| StreamExpressionNamedParameter threadsParam = factory.getNamedOperand(expression, "threads"); |
| |
| int threads = 6; |
| |
| if(threadsParam != null) { |
| threads = Integer.parseInt(((StreamExpressionValue)threadsParam.getParameter()).getValue()); |
| } |
| |
| if(1 != streamExpressions.size()){ |
| throw new IOException(String.format(Locale.ROOT,"Invalid expression %s - expecting a single stream but found %d",expression, streamExpressions.size())); |
| } |
| |
| TupleStream stream = factory.constructStream(streamExpressions.get(0)); |
| init(stream, threads, factory); |
| } |
| |
| private void init(TupleStream tupleStream, int threads, StreamFactory factory) throws IOException{ |
| this.threads = threads; |
| this.stream = tupleStream; |
| this.streamFactory = factory; |
| } |
| |
| @Override |
| public StreamExpression toExpression(StreamFactory factory) throws IOException { |
| return toExpression(factory, true); |
| } |
| |
| private StreamExpression toExpression(StreamFactory factory, boolean includeStreams) throws IOException { |
| |
| // function name |
| StreamExpression expression = new StreamExpression(factory.getFunctionName(this.getClass())); |
| expression.addParameter(new StreamExpressionNamedParameter("threads", Integer.toString(threads))); |
| |
| // stream |
| if(includeStreams) { |
| if (stream instanceof Expressible) { |
| expression.addParameter(((Expressible) stream).toExpression(factory)); |
| } else { |
| throw new IOException("The ExecuteStream contains a non-expressible TupleStream - it cannot be converted to an expression"); |
| } |
| } |
| |
| return expression; |
| } |
| |
| @Override |
| public Explanation toExplanation(StreamFactory factory) throws IOException { |
| |
| return new StreamExplanation(getStreamNodeId().toString()) |
| .withChildren(new Explanation[]{ |
| stream.toExplanation(factory) |
| }) |
| .withFunctionName(factory.getFunctionName(this.getClass())) |
| .withImplementingClass(this.getClass().getName()) |
| .withExpressionType(ExpressionType.STREAM_DECORATOR) |
| .withExpression(toExpression(factory, false).toString()); |
| } |
| |
| public void setStreamContext(StreamContext streamContext) { |
| this.streamContext = streamContext; |
| this.stream.setStreamContext(streamContext); |
| } |
| |
| public List<TupleStream> children() { |
| List<TupleStream> l = new ArrayList<>(); |
| l.add(stream); |
| return l; |
| } |
| |
| public void open() throws IOException { |
| executorService = ExecutorUtil.newMDCAwareFixedThreadPool(threads, new SolrNamedThreadFactory("ExecutorStream")); |
| stream.open(); |
| } |
| |
| public void close() throws IOException { |
| stream.close(); |
| executorService.shutdown(); |
| try { |
| executorService.awaitTermination(Long.MAX_VALUE, TimeUnit.SECONDS); |
| } catch(InterruptedException e) { |
| log.error("Interrupted while waiting for termination", e); |
| } |
| } |
| |
| public Tuple read() throws IOException { |
| @SuppressWarnings({"unchecked", "rawtypes"}) |
| ArrayBlockingQueue<Tuple> queue = new ArrayBlockingQueue(10000); |
| while(true) { |
| Tuple tuple = stream.read(); |
| if (!tuple.EOF) { |
| try { |
| queue.put(tuple); |
| } catch (InterruptedException e) { |
| throw new IOException(e); |
| } |
| executorService.execute(new StreamTask(queue, streamFactory, streamContext)); |
| } else { |
| return tuple; |
| } |
| } |
| } |
| |
| public StreamComparator getStreamSort(){ |
| return stream.getStreamSort(); |
| } |
| |
| public int getCost() { |
| return 0; |
| } |
| |
| public static class StreamTask implements Runnable { |
| |
| private ArrayBlockingQueue<Tuple> queue; |
| private StreamFactory streamFactory; |
| private StreamContext streamContext; |
| |
| @SuppressWarnings({"unchecked"}) |
| public StreamTask(@SuppressWarnings({"rawtypes"})ArrayBlockingQueue queue, StreamFactory streamFactory, StreamContext streamContext) { |
| this.queue = queue; |
| this.streamFactory = streamFactory; |
| this.streamContext = new StreamContext(); |
| this.streamContext.setObjectCache(streamContext.getObjectCache()); |
| this.streamContext.setSolrClientCache(streamContext.getSolrClientCache()); |
| this.streamContext.setModelCache(streamContext.getModelCache()); |
| } |
| |
| public void run() { |
| Tuple tuple = null; |
| try { |
| tuple = queue.take(); |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| |
| String expr = tuple.getString("expr_s"); |
| Object id = tuple.get(ID); |
| TupleStream stream = null; |
| |
| try { |
| stream = streamFactory.constructStream(expr); |
| stream.setStreamContext(streamContext); |
| stream.open(); |
| while (true) { |
| Tuple t = stream.read(); |
| if (t.EOF) { |
| break; |
| } |
| } |
| } catch (Exception e) { |
| log.error("Executor Error: id={} expr_s={}", id, expr, e); |
| } finally { |
| try { |
| stream.close(); |
| } catch (Exception e1) { |
| log.error("Executor Error", e1); |
| } |
| } |
| } |
| } |
| } |