/*
* 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.support;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
import org.elasticsearch.common.Booleans;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.regex.Regex;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.index.mapper.MapperService;
/**
* Encapsulates the logic of whether a new index should be automatically created when
* a write operation is about to happen in a non existing index.
*/
public final class AutoCreateIndex {
private final boolean needToCheck;
private final boolean globallyDisabled;
private final boolean dynamicMappingDisabled;
private final String[] matches;
private final String[] matches2;
private final IndexNameExpressionResolver resolver;
@Inject
public AutoCreateIndex(Settings settings, IndexNameExpressionResolver resolver) {
this.resolver = resolver;
dynamicMappingDisabled = !settings.getAsBoolean(MapperService.INDEX_MAPPER_DYNAMIC_SETTING, MapperService.INDEX_MAPPER_DYNAMIC_DEFAULT);
String value = settings.get("action.auto_create_index");
if (value == null || Booleans.isExplicitTrue(value)) {
needToCheck = true;
globallyDisabled = false;
matches = null;
matches2 = null;
} else if (Booleans.isExplicitFalse(value)) {
needToCheck = false;
globallyDisabled = true;
matches = null;
matches2 = null;
} else {
needToCheck = true;
globallyDisabled = false;
matches = Strings.commaDelimitedListToStringArray(value);
matches2 = new String[matches.length];
for (int i = 0; i < matches.length; i++) {
matches2[i] = matches[i].substring(1);
}
}
}
/**
* Do we really need to check if an index should be auto created?
*/
public boolean needToCheck() {
return this.needToCheck;
}
/**
* Should the index be auto created?
*/
public boolean shouldAutoCreate(String index, ClusterState state) {
if (!needToCheck) {
return false;
}
boolean exists = resolver.hasIndexOrAlias(index, state);
if (exists) {
return false;
}
if (globallyDisabled || dynamicMappingDisabled) {
return false;
}
// matches not set, default value of "true"
if (matches == null) {
return true;
}
for (int i = 0; i < matches.length; i++) {
char c = matches[i].charAt(0);
if (c == '-') {
if (Regex.simpleMatch(matches2[i], index)) {
return false;
}
} else if (c == '+') {
if (Regex.simpleMatch(matches2[i], index)) {
return true;
}
} else {
if (Regex.simpleMatch(matches[i], index)) {
return true;
}
}
}
return false;
}
}