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optimize single index conversion from alias to concrete index

This commit is contained in:
kimchy 2011-01-24 21:25:20 +02:00
parent 95dc08fa3b
commit a5e02d559f
1 changed files with 31 additions and 2 deletions
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33
modules/elasticsearch/src/main/java/org/elasticsearch/cluster/metadata/MetaData.java
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@ -20,6 +20,7 @@
package org.elasticsearch.cluster.metadata;
import org.elasticsearch.ElasticSearchIllegalArgumentException;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.collect.*;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
@ -150,13 +151,41 @@ public class MetaData implements Iterable<IndexMetaData> {
if (indices == null || indices.length == 0) {
return concreteAllIndices();
}
// optimize for single element index (common case)
if (indices.length == 1) {
if (indices[0].length() == 0) {
String index = indices[0];
if (index.length() == 0) {
return concreteAllIndices();
}
if (indices[0].equals("_all")) {
if (index.equals("_all")) {
return concreteAllIndices();
}
// if a direct index name, just return the array provided
if (this.indices.containsKey(index)) {
return indices;
}
String[] actualLst = aliasAndIndexToIndexMap.get(index);
if (actualLst == null) {
if (!ignoreMissing) {
throw new IndexMissingException(new Index(index));
} else {
return Strings.EMPTY_ARRAY;
}
} else {
return actualLst;
}
}
// check if its a possible aliased index, if not, just return the
// passed array
boolean possiblyAliased = false;
for (String index : indices) {
if (!this.indices.containsKey(index)) {
possiblyAliased = true;
}
}
if (!possiblyAliased) {
return indices;
}
ArrayList<String> actualIndices = Lists.newArrayListWithCapacity(indices.length);