| /* |
| * 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.spelling.suggest; |
| |
| import java.io.IOException; |
| import java.lang.invoke.MethodHandles; |
| |
| import org.apache.lucene.search.spell.Dictionary; |
| import org.apache.lucene.search.suggest.InputIterator; |
| import org.apache.lucene.util.BytesRef; |
| import org.apache.lucene.util.BytesRefIterator; |
| import org.apache.lucene.util.LuceneTestCase; |
| import org.apache.lucene.util.TestUtil; |
| import org.apache.solr.common.params.CommonParams; |
| import org.apache.solr.core.SolrCore; |
| import org.apache.solr.search.SolrIndexSearcher; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Factory for a dictionary with an iterator over bounded-length random strings (with fixed |
| * weight of 1 and null payloads) that only operates when RandomDictionary.enabledSysProp |
| * is set; this will be true from the time a RandomDictionary has been constructed until |
| * its enabledSysProp has been cleared. |
| */ |
| public class RandomTestDictionaryFactory extends DictionaryFactory { |
| public static final String RAND_DICT_MAX_ITEMS = "randDictMaxItems"; |
| |
| private static final Logger log = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass()); |
| private static final long DEFAULT_MAX_ITEMS = 100_000_000; |
| |
| @Override |
| public RandomTestDictionary create(SolrCore core, SolrIndexSearcher searcher) { |
| if(params == null) { |
| // should not happen; implies setParams was not called |
| throw new IllegalStateException("Value of params not set"); |
| } |
| String name = (String)params.get(CommonParams.NAME); |
| if (name == null) { // Shouldn't happen since this is the component name |
| throw new IllegalArgumentException(CommonParams.NAME + " is a mandatory parameter"); |
| } |
| long maxItems = DEFAULT_MAX_ITEMS; |
| Object specifiedMaxItems = params.get(RAND_DICT_MAX_ITEMS); |
| if (specifiedMaxItems != null) { |
| maxItems = Long.parseLong(specifiedMaxItems.toString()); |
| } |
| return new RandomTestDictionary(name, maxItems); |
| } |
| |
| public static class RandomTestDictionary implements Dictionary { |
| private static final String SYS_PROP_PREFIX = RandomTestDictionary.class.getName() + ".enabled."; |
| private final String enabledSysProp; // Clear this property to stop the input iterator |
| private final long maxItems; |
| private long emittedItems = 0L; |
| |
| RandomTestDictionary(String name, long maxItems) { |
| enabledSysProp = getEnabledSysProp(name); |
| this.maxItems = maxItems; |
| synchronized (RandomTestDictionary.class) { |
| if (System.getProperty(enabledSysProp) != null) { |
| throw new RuntimeException("System property '" + enabledSysProp + "' is already in use."); |
| } |
| System.setProperty(enabledSysProp, "true"); |
| } |
| } |
| |
| public static String getEnabledSysProp(String suggesterName) { |
| return SYS_PROP_PREFIX + suggesterName; |
| } |
| |
| @Override |
| public InputIterator getEntryIterator() throws IOException { |
| return new InputIterator.InputIteratorWrapper(new RandomByteRefIterator()); |
| } |
| |
| private class RandomByteRefIterator implements BytesRefIterator { |
| private static final int MAX_LENGTH = 100; |
| |
| @Override |
| public BytesRef next() throws IOException { |
| BytesRef next = null; |
| if (System.getProperty(enabledSysProp) != null) { |
| if (emittedItems < maxItems) { |
| ++emittedItems; |
| next = new BytesRef(TestUtil.randomUnicodeString(LuceneTestCase.random(), MAX_LENGTH)); |
| if (emittedItems % 1000 == 0) { |
| log.info("{} emitted {} items", enabledSysProp, emittedItems); |
| } |
| } else { |
| log.info("{} disabled after emitting {} items", enabledSysProp, emittedItems); |
| System.clearProperty(enabledSysProp); // disable once maxItems has been reached |
| emittedItems = 0L; |
| } |
| } else { |
| log.warn("{} invoked when disabled", enabledSysProp); |
| emittedItems = 0L; |
| } |
| return next; |
| } |
| } |
| } |
| } |