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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.search.internal;
import org.elasticsearch.action.search.SearchType;
import org.elasticsearch.cluster.metadata.AliasMetaData;
import org.elasticsearch.cluster.metadata.IndexMetaData;
import org.elasticsearch.common.bytes.BytesReference;
import org.elasticsearch.common.collect.ImmutableOpenMap;
import org.elasticsearch.common.xcontent.XContentFactory;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.index.Index;
import org.elasticsearch.index.query.BoolQueryBuilder;
import org.elasticsearch.index.query.QueryBuilder;
import org.elasticsearch.index.query.QueryParseContext;
import org.elasticsearch.index.query.QueryShardContext;
import org.elasticsearch.index.shard.ShardId;
import org.elasticsearch.indices.AliasFilterParsingException;
import org.elasticsearch.indices.InvalidAliasNameException;
import org.elasticsearch.search.Scroll;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import java.io.IOException;
import java.util.function.Function;
/**
* Shard level request that represents a search.
* It provides all the methods that the {@link org.elasticsearch.search.internal.SearchContext} needs.
* Provides a cache key based on its content that can be used to cache shard level response.
*/
public interface ShardSearchRequest {
ShardId shardId();
String[] types();
SearchSourceBuilder source();
void source(SearchSourceBuilder source);
int numberOfShards();
SearchType searchType();
QueryBuilder filteringAliases();
long nowInMillis();
Boolean requestCache();
Scroll scroll();
/**
* Sets if this shard search needs to be profiled or not
* @param profile True if the shard should be profiled
*/
void setProfile(boolean profile);
/**
* Returns true if this shard search is being profiled or not
*/
boolean isProfile();
/**
* Returns the cache key for this shard search request, based on its content
*/
BytesReference cacheKey() throws IOException;
/**
* Rewrites this request into its primitive form. e.g. by rewriting the
* QueryBuilder.
*/
void rewrite(QueryShardContext context) throws IOException;
/**
* Returns the filter associated with listed filtering aliases.
* <p>
* The list of filtering aliases should be obtained by calling MetaData.filteringAliases.
* Returns <tt>null</tt> if no filtering is required.</p>
*/
static QueryBuilder parseAliasFilter(Function<XContentParser, QueryParseContext> contextFactory,
IndexMetaData metaData, String... aliasNames) {
if (aliasNames == null || aliasNames.length == 0) {
return null;
}
Index index = metaData.getIndex();
ImmutableOpenMap<String, AliasMetaData> aliases = metaData.getAliases();
Function<AliasMetaData, QueryBuilder> parserFunction = (alias) -> {
if (alias.filter() == null) {
return null;
}
try {
byte[] filterSource = alias.filter().uncompressed();
try (XContentParser parser = XContentFactory.xContent(filterSource).createParser(filterSource)) {
return contextFactory.apply(parser).parseInnerQueryBuilder();
}
} catch (IOException ex) {
throw new AliasFilterParsingException(index, alias.getAlias(), "Invalid alias filter", ex);
}
};
if (aliasNames.length == 1) {
AliasMetaData alias = aliases.get(aliasNames[0]);
if (alias == null) {
// This shouldn't happen unless alias disappeared after filteringAliases was called.
throw new InvalidAliasNameException(index, aliasNames[0], "Unknown alias name was passed to alias Filter");
}
return parserFunction.apply(alias);
} else {
// we need to bench here a bit, to see maybe it makes sense to use OrFilter
BoolQueryBuilder combined = new BoolQueryBuilder();
for (String aliasName : aliasNames) {
AliasMetaData alias = aliases.get(aliasName);
if (alias == null) {
// This shouldn't happen unless alias disappeared after filteringAliases was called.
throw new InvalidAliasNameException(index, aliasNames[0],
"Unknown alias name was passed to alias Filter");
}
QueryBuilder parsedFilter = parserFunction.apply(alias);
if (parsedFilter != null) {
combined.should(parsedFilter);
} else {
// The filter might be null only if filter was removed after filteringAliases was called
return null;
}
}
return combined;
}
}
}
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