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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.action.search.type;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Maps;
import org.apache.lucene.util.BytesRef;
import org.apache.lucene.util.CharsRefBuilder;
import org.elasticsearch.ElasticsearchIllegalArgumentException;
import org.elasticsearch.ElasticsearchIllegalStateException;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchScrollRequest;
import org.elasticsearch.action.search.SearchType;
import org.elasticsearch.cluster.routing.ShardRouting;
import org.elasticsearch.common.Base64;
import org.elasticsearch.common.Nullable;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.collect.Tuple;
import org.elasticsearch.common.util.concurrent.AtomicArray;
import org.elasticsearch.search.SearchPhaseResult;
import org.elasticsearch.search.internal.InternalScrollSearchRequest;
import org.elasticsearch.search.internal.ShardSearchTransportRequest;
import java.io.IOException;
import java.util.Map;
/**
*
*/
public abstract class TransportSearchHelper {
public static ShardSearchTransportRequest internalSearchRequest(ShardRouting shardRouting, int numberOfShards, SearchRequest request, String[] filteringAliases, long nowInMillis, boolean useSlowScroll) {
return new ShardSearchTransportRequest(request, shardRouting, numberOfShards, useSlowScroll, filteringAliases, nowInMillis);
}
public static InternalScrollSearchRequest internalScrollSearchRequest(long id, SearchScrollRequest request) {
return new InternalScrollSearchRequest(request, id);
}
public static String buildScrollId(SearchType searchType, AtomicArray<? extends SearchPhaseResult> searchPhaseResults, @Nullable Map<String, String> attributes) throws IOException {
if (searchType == SearchType.DFS_QUERY_THEN_FETCH || searchType == SearchType.QUERY_THEN_FETCH) {
return buildScrollId(ParsedScrollId.QUERY_THEN_FETCH_TYPE, searchPhaseResults, attributes);
} else if (searchType == SearchType.QUERY_AND_FETCH || searchType == SearchType.DFS_QUERY_AND_FETCH) {
return buildScrollId(ParsedScrollId.QUERY_AND_FETCH_TYPE, searchPhaseResults, attributes);
} else if (searchType == SearchType.SCAN) {
return buildScrollId(ParsedScrollId.SCAN, searchPhaseResults, attributes);
} else {
throw new ElasticsearchIllegalStateException();
}
}
public static String buildScrollId(String type, AtomicArray<? extends SearchPhaseResult> searchPhaseResults, @Nullable Map<String, String> attributes) throws IOException {
StringBuilder sb = new StringBuilder().append(type).append(';');
sb.append(searchPhaseResults.asList().size()).append(';');
for (AtomicArray.Entry<? extends SearchPhaseResult> entry : searchPhaseResults.asList()) {
SearchPhaseResult searchPhaseResult = entry.value;
sb.append(searchPhaseResult.id()).append(':').append(searchPhaseResult.shardTarget().nodeId()).append(';');
}
if (attributes == null) {
sb.append("0;");
} else {
sb.append(attributes.size()).append(";");
for (Map.Entry<String, String> entry : attributes.entrySet()) {
sb.append(entry.getKey()).append(':').append(entry.getValue()).append(';');
}
}
BytesRef bytesRef = new BytesRef(sb);
return Base64.encodeBytes(bytesRef.bytes, bytesRef.offset, bytesRef.length, Base64.URL_SAFE);
}
public static ParsedScrollId parseScrollId(String scrollId) {
CharsRefBuilder spare = new CharsRefBuilder();
try {
byte[] decode = Base64.decode(scrollId, Base64.URL_SAFE);
spare.copyUTF8Bytes(decode, 0, decode.length);
} catch (Exception e) {
throw new ElasticsearchIllegalArgumentException("Failed to decode scrollId", e);
}
String[] elements = Strings.splitStringToArray(spare.get(), ';');
if (elements.length < 2) {
throw new ElasticsearchIllegalArgumentException("Malformed scrollId [" + scrollId + "]");
}
int index = 0;
String type = elements[index++];
int contextSize = Integer.parseInt(elements[index++]);
if (elements.length < contextSize + 2) {
throw new ElasticsearchIllegalArgumentException("Malformed scrollId [" + scrollId + "]");
}
@SuppressWarnings({"unchecked"}) Tuple<String, Long>[] context = new Tuple[contextSize];
for (int i = 0; i < contextSize; i++) {
String element = elements[index++];
int sep = element.indexOf(':');
if (sep == -1) {
throw new ElasticsearchIllegalArgumentException("Malformed scrollId [" + scrollId + "]");
}
context[i] = new Tuple<>(element.substring(sep + 1), Long.parseLong(element.substring(0, sep)));
}
Map<String, String> attributes;
int attributesSize = Integer.parseInt(elements[index++]);
if (attributesSize == 0) {
attributes = ImmutableMap.of();
} else {
attributes = Maps.newHashMapWithExpectedSize(attributesSize);
for (int i = 0; i < attributesSize; i++) {
String element = elements[index++];
int sep = element.indexOf(':');
attributes.put(element.substring(0, sep), element.substring(sep + 1));
}
}
return new ParsedScrollId(scrollId, type, context, attributes);
}
private TransportSearchHelper() {
}
}