diff --git a/modules/elasticsearch/src/main/java/org/elasticsearch/common/lucene/search/LimitFilter.java b/modules/elasticsearch/src/main/java/org/elasticsearch/common/lucene/search/LimitFilter.java new file mode 100644 index 00000000000..0f1f222258d --- /dev/null +++ b/modules/elasticsearch/src/main/java/org/elasticsearch/common/lucene/search/LimitFilter.java @@ -0,0 +1,61 @@ +/* + * Licensed to Elastic Search and Shay Banon under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. Elastic Search 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.elasticsearch.common.lucene.search; + +import org.apache.lucene.index.IndexReader; +import org.apache.lucene.search.DocIdSet; +import org.elasticsearch.common.lucene.docset.GetDocSet; + +import java.io.IOException; + +public class LimitFilter extends NoCacheFilter { + + private final int limit; + + public LimitFilter(int limit) { + this.limit = limit; + } + + public int getLimit() { + return limit; + } + + @Override public DocIdSet getDocIdSet(IndexReader reader) throws IOException { + return new LimitDocSet(reader.maxDoc(), limit); + } + + public static class LimitDocSet extends GetDocSet { + + private final int limit; + private int counter; + + public LimitDocSet(int maxDoc, int limit) { + super(maxDoc); + this.limit = limit; + } + + @Override public boolean get(int doc) throws IOException { + if (++counter > limit) { + return false; + } + return true; + } + } +} \ No newline at end of file diff --git a/modules/elasticsearch/src/main/java/org/elasticsearch/common/lucene/search/NoCacheFilter.java b/modules/elasticsearch/src/main/java/org/elasticsearch/common/lucene/search/NoCacheFilter.java new file mode 100644 index 00000000000..aa87b1f17ee --- /dev/null +++ b/modules/elasticsearch/src/main/java/org/elasticsearch/common/lucene/search/NoCacheFilter.java @@ -0,0 +1,29 @@ +/* + * Licensed to Elastic Search and Shay Banon under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. Elastic Search 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.elasticsearch.common.lucene.search; + +import org.apache.lucene.search.Filter; + +/** + * A marker interface for {@link org.apache.lucene.search.Filter} denoting the filter + * as one that should not be cached, ever. + */ +public abstract class NoCacheFilter extends Filter { +} \ No newline at end of file diff --git a/modules/elasticsearch/src/main/java/org/elasticsearch/index/cache/filter/support/AbstractConcurrentMapFilterCache.java b/modules/elasticsearch/src/main/java/org/elasticsearch/index/cache/filter/support/AbstractConcurrentMapFilterCache.java index 6abb72ed43e..a04634798de 100644 --- a/modules/elasticsearch/src/main/java/org/elasticsearch/index/cache/filter/support/AbstractConcurrentMapFilterCache.java +++ b/modules/elasticsearch/src/main/java/org/elasticsearch/index/cache/filter/support/AbstractConcurrentMapFilterCache.java @@ -25,6 +25,7 @@ import org.apache.lucene.search.Filter; import org.elasticsearch.common.RamUsage; import org.elasticsearch.common.lab.LongsLAB; import org.elasticsearch.common.lucene.docset.DocSet; +import org.elasticsearch.common.lucene.search.NoCacheFilter; import org.elasticsearch.common.settings.Settings; import org.elasticsearch.common.unit.ByteSizeUnit; import org.elasticsearch.common.unit.ByteSizeValue; @@ -121,6 +122,9 @@ public abstract class AbstractConcurrentMapFilterCache extends AbstractIndexComp } @Override public Filter cache(Filter filterToCache) { + if (filterToCache instanceof NoCacheFilter) { + return filterToCache; + } if (isCached(filterToCache)) { return filterToCache; } diff --git a/modules/elasticsearch/src/main/java/org/elasticsearch/index/cache/filter/support/AbstractWeightedFilterCache.java b/modules/elasticsearch/src/main/java/org/elasticsearch/index/cache/filter/support/AbstractWeightedFilterCache.java index f087ab99a2a..57765930ad3 100644 --- a/modules/elasticsearch/src/main/java/org/elasticsearch/index/cache/filter/support/AbstractWeightedFilterCache.java +++ b/modules/elasticsearch/src/main/java/org/elasticsearch/index/cache/filter/support/AbstractWeightedFilterCache.java @@ -29,6 +29,7 @@ import org.elasticsearch.common.concurrentlinkedhashmap.EvictionListener; import org.elasticsearch.common.concurrentlinkedhashmap.Weigher; import org.elasticsearch.common.lab.LongsLAB; import org.elasticsearch.common.lucene.docset.DocSet; +import org.elasticsearch.common.lucene.search.NoCacheFilter; import org.elasticsearch.common.settings.Settings; import org.elasticsearch.common.unit.ByteSizeUnit; import org.elasticsearch.common.unit.ByteSizeValue; @@ -138,6 +139,9 @@ public abstract class AbstractWeightedFilterCache extends AbstractIndexComponent } @Override public Filter cache(Filter filterToCache) { + if (filterToCache instanceof NoCacheFilter) { + return filterToCache; + } if (isCached(filterToCache)) { return filterToCache; } diff --git a/modules/elasticsearch/src/main/java/org/elasticsearch/index/query/IndexQueryParserModule.java b/modules/elasticsearch/src/main/java/org/elasticsearch/index/query/IndexQueryParserModule.java index 600e1a2d244..cc46a5b6ce9 100644 --- a/modules/elasticsearch/src/main/java/org/elasticsearch/index/query/IndexQueryParserModule.java +++ b/modules/elasticsearch/src/main/java/org/elasticsearch/index/query/IndexQueryParserModule.java @@ -255,6 +255,7 @@ public class IndexQueryParserModule extends AbstractModule { bindings.processXContentQueryFilter(HasChildFilterParser.NAME, HasChildFilterParser.class); bindings.processXContentQueryFilter(TypeFilterParser.NAME, TypeFilterParser.class); bindings.processXContentQueryFilter(IdsFilterParser.NAME, IdsFilterParser.class); + bindings.processXContentQueryFilter(LimitFilterParser.NAME, LimitFilterParser.class); bindings.processXContentQueryFilter(TermFilterParser.NAME, TermFilterParser.class); bindings.processXContentQueryFilter(TermsFilterParser.NAME, TermsFilterParser.class); bindings.processXContentQueryFilter(RangeFilterParser.NAME, RangeFilterParser.class); diff --git a/modules/elasticsearch/src/main/java/org/elasticsearch/index/query/xcontent/FilterBuilders.java b/modules/elasticsearch/src/main/java/org/elasticsearch/index/query/xcontent/FilterBuilders.java index fb5a7b0713f..50d14ab10ae 100644 --- a/modules/elasticsearch/src/main/java/org/elasticsearch/index/query/xcontent/FilterBuilders.java +++ b/modules/elasticsearch/src/main/java/org/elasticsearch/index/query/xcontent/FilterBuilders.java @@ -35,6 +35,13 @@ public abstract class FilterBuilders { return new MatchAllFilterBuilder(); } + /** + * A filter that limits the results to the provided limit value (per shard!). + */ + public static LimitFilterBuilder limitFilter(int limit) { + return new LimitFilterBuilder(limit); + } + /** * Creates a new ids filter with the provided doc/mapping types. * diff --git a/modules/elasticsearch/src/main/java/org/elasticsearch/index/query/xcontent/LimitFilterBuilder.java b/modules/elasticsearch/src/main/java/org/elasticsearch/index/query/xcontent/LimitFilterBuilder.java new file mode 100644 index 00000000000..673e6ffffd1 --- /dev/null +++ b/modules/elasticsearch/src/main/java/org/elasticsearch/index/query/xcontent/LimitFilterBuilder.java @@ -0,0 +1,39 @@ +/* + * Licensed to Elastic Search and Shay Banon under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. Elastic Search 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.elasticsearch.index.query.xcontent; + +import org.elasticsearch.common.xcontent.XContentBuilder; + +import java.io.IOException; + +public class LimitFilterBuilder extends BaseFilterBuilder { + + private final int limit; + + public LimitFilterBuilder(int limit) { + this.limit = limit; + } + + @Override protected void doXContent(XContentBuilder builder, Params params) throws IOException { + builder.startObject(LimitFilterParser.NAME); + builder.field("value", limit); + builder.endObject(); + } +} \ No newline at end of file diff --git a/modules/elasticsearch/src/main/java/org/elasticsearch/index/query/xcontent/LimitFilterParser.java b/modules/elasticsearch/src/main/java/org/elasticsearch/index/query/xcontent/LimitFilterParser.java new file mode 100644 index 00000000000..6de07c8646b --- /dev/null +++ b/modules/elasticsearch/src/main/java/org/elasticsearch/index/query/xcontent/LimitFilterParser.java @@ -0,0 +1,68 @@ +/* + * Licensed to Elastic Search and Shay Banon under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. Elastic Search 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.elasticsearch.index.query.xcontent; + +import org.apache.lucene.search.Filter; +import org.elasticsearch.common.inject.Inject; +import org.elasticsearch.common.lucene.search.LimitFilter; +import org.elasticsearch.common.settings.Settings; +import org.elasticsearch.common.xcontent.XContentParser; +import org.elasticsearch.index.AbstractIndexComponent; +import org.elasticsearch.index.Index; +import org.elasticsearch.index.query.QueryParsingException; +import org.elasticsearch.index.settings.IndexSettings; + +import java.io.IOException; + +public class LimitFilterParser extends AbstractIndexComponent implements XContentFilterParser { + + public static final String NAME = "limit"; + + @Inject public LimitFilterParser(Index index, @IndexSettings Settings settings) { + super(index, settings); + } + + @Override public String[] names() { + return new String[]{NAME}; + } + + @Override public Filter parse(QueryParseContext parseContext) throws IOException, QueryParsingException { + XContentParser parser = parseContext.parser(); + + int limit = -1; + String currentFieldName = null; + XContentParser.Token token; + while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) { + if (token == XContentParser.Token.FIELD_NAME) { + currentFieldName = parser.currentName(); + } else if (token.isValue()) { + if ("value".equals(currentFieldName)) { + limit = parser.intValue(); + } + } + } + + if (limit == -1) { + throw new QueryParsingException(index, "No value specified for limit filter"); + } + + return new LimitFilter(limit); + } +} diff --git a/modules/elasticsearch/src/test/java/org/elasticsearch/index/query/xcontent/SimpleIndexQueryParserTests.java b/modules/elasticsearch/src/test/java/org/elasticsearch/index/query/xcontent/SimpleIndexQueryParserTests.java index de6c72dd10c..bd281a511d5 100644 --- a/modules/elasticsearch/src/test/java/org/elasticsearch/index/query/xcontent/SimpleIndexQueryParserTests.java +++ b/modules/elasticsearch/src/test/java/org/elasticsearch/index/query/xcontent/SimpleIndexQueryParserTests.java @@ -21,11 +21,23 @@ package org.elasticsearch.index.query.xcontent; import org.apache.lucene.index.Term; import org.apache.lucene.search.*; -import org.apache.lucene.search.spans.*; +import org.apache.lucene.search.spans.SpanFirstQuery; +import org.apache.lucene.search.spans.SpanNearQuery; +import org.apache.lucene.search.spans.SpanNotQuery; +import org.apache.lucene.search.spans.SpanOrQuery; +import org.apache.lucene.search.spans.SpanTermQuery; import org.apache.lucene.util.NumericUtils; import org.elasticsearch.common.inject.Injector; import org.elasticsearch.common.inject.ModulesBuilder; -import org.elasticsearch.common.lucene.search.*; +import org.elasticsearch.common.lucene.search.AndFilter; +import org.elasticsearch.common.lucene.search.LimitFilter; +import org.elasticsearch.common.lucene.search.MoreLikeThisQuery; +import org.elasticsearch.common.lucene.search.MultiPhrasePrefixQuery; +import org.elasticsearch.common.lucene.search.NotFilter; +import org.elasticsearch.common.lucene.search.OrFilter; +import org.elasticsearch.common.lucene.search.Queries; +import org.elasticsearch.common.lucene.search.TermFilter; +import org.elasticsearch.common.lucene.search.XBooleanFilter; import org.elasticsearch.common.lucene.search.function.BoostScoreFunction; import org.elasticsearch.common.lucene.search.function.FunctionScoreQuery; import org.elasticsearch.common.settings.ImmutableSettings; @@ -956,6 +968,19 @@ public class SimpleIndexQueryParserTests { assertThat(((TermFilter) filteredQuery.getFilter()).getTerm(), equalTo(new Term("name.last", "banon"))); } + @Test public void testLimitFilter() throws Exception { + IndexQueryParser queryParser = queryParser(); + String query = copyToStringFromClasspath("/org/elasticsearch/index/query/xcontent/limit-filter.json"); + Query parsedQuery = queryParser.parse(query).query(); + assertThat(parsedQuery, instanceOf(FilteredQuery.class)); + FilteredQuery filteredQuery = (FilteredQuery) parsedQuery; + assertThat(filteredQuery.getFilter(), instanceOf(LimitFilter.class)); + assertThat(((LimitFilter) filteredQuery.getFilter()).getLimit(), equalTo(2)); + + assertThat(filteredQuery.getQuery(), instanceOf(TermQuery.class)); + assertThat(((TermQuery) filteredQuery.getQuery()).getTerm(), equalTo(new Term("name.first", "shay"))); + } + @Test public void testTermFilterQuery() throws Exception { IndexQueryParser queryParser = queryParser(); String query = copyToStringFromClasspath("/org/elasticsearch/index/query/xcontent/term-filter.json"); diff --git a/modules/elasticsearch/src/test/java/org/elasticsearch/index/query/xcontent/limit-filter.json b/modules/elasticsearch/src/test/java/org/elasticsearch/index/query/xcontent/limit-filter.json new file mode 100644 index 00000000000..240cf5cd856 --- /dev/null +++ b/modules/elasticsearch/src/test/java/org/elasticsearch/index/query/xcontent/limit-filter.json @@ -0,0 +1,14 @@ +{ + "filtered" : { + "filter" : { + "limit" : { + "value" : 2 + } + }, + "query" : { + "term" : { + "name.first" : "shay" + } + } + } +} \ No newline at end of file diff --git a/modules/test/integration/src/test/java/org/elasticsearch/test/integration/search/query/SimpleQueryTests.java b/modules/test/integration/src/test/java/org/elasticsearch/test/integration/search/query/SimpleQueryTests.java index 2e2b5d018a2..140b09b87b5 100644 --- a/modules/test/integration/src/test/java/org/elasticsearch/test/integration/search/query/SimpleQueryTests.java +++ b/modules/test/integration/src/test/java/org/elasticsearch/test/integration/search/query/SimpleQueryTests.java @@ -195,6 +195,26 @@ public class SimpleQueryTests extends AbstractNodesTests { assertThat(searchResponse.hits().totalHits(), equalTo(0l)); } + @Test public void testLimitFilter() throws Exception { + try { + client.admin().indices().prepareDelete("test").execute().actionGet(); + } catch (Exception e) { + // ignore + } + + client.admin().indices().prepareCreate("test").setSettings(ImmutableSettings.settingsBuilder().put("number_of_shards", 1)).execute().actionGet(); + + client.prepareIndex("test", "type1", "1").setSource("field1", "value1_1").execute().actionGet(); + client.prepareIndex("test", "type1", "2").setSource("field1", "value1_2").execute().actionGet(); + client.prepareIndex("test", "type1", "3").setSource("field2", "value2_3").execute().actionGet(); + client.prepareIndex("test", "type1", "4").setSource("field3", "value3_4").execute().actionGet(); + + client.admin().indices().prepareRefresh().execute().actionGet(); + + SearchResponse searchResponse = client.prepareSearch().setQuery(filteredQuery(matchAllQuery(), limitFilter(2))).execute().actionGet(); + assertThat(searchResponse.hits().totalHits(), equalTo(2l)); + } + @Test public void filterExistsMissingTests() throws Exception { try { client.admin().indices().prepareDelete("test").execute().actionGet();