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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.cluster.node;
import org.elasticsearch.common.Nullable;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.network.NetworkAddress;
import org.elasticsearch.common.regex.Regex;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.transport.InetSocketTransportAddress;
import java.util.HashMap;
import java.util.Map;
/**
*/
public class DiscoveryNodeFilters {
public enum OpType {
AND,
OR
}
public static DiscoveryNodeFilters buildFromSettings(OpType opType, String prefix, Settings settings) {
return buildFromKeyValue(opType, settings.getByPrefix(prefix).getAsMap());
}
public static DiscoveryNodeFilters buildFromKeyValue(OpType opType, Map filters) {
Map bFilters = new HashMap<>();
for (Map.Entry entry : filters.entrySet()) {
String[] values = Strings.splitStringByCommaToArray(entry.getValue());
if (values.length > 0) {
bFilters.put(entry.getKey(), values);
}
}
if (bFilters.isEmpty()) {
return null;
}
return new DiscoveryNodeFilters(opType, bFilters);
}
private final Map filters;
private final OpType opType;
DiscoveryNodeFilters(OpType opType, Map filters) {
this.opType = opType;
this.filters = filters;
}
private boolean matchByIP(String[] values, @Nullable String hostIp, @Nullable String publishIp) {
for (String value : values) {
boolean matchIp = Regex.simpleMatch(value, hostIp) || Regex.simpleMatch(value, publishIp);
if (matchIp) {
return matchIp;
}
}
return false;
}
public boolean match(DiscoveryNode node) {
for (Map.Entry entry : filters.entrySet()) {
String attr = entry.getKey();
String[] values = entry.getValue();
if ("_ip".equals(attr)) {
// We check both the host_ip or the publish_ip
String publishAddress = null;
if (node.getAddress() instanceof InetSocketTransportAddress) {
publishAddress = NetworkAddress.format(((InetSocketTransportAddress) node.getAddress()).address().getAddress());
}
boolean match = matchByIP(values, node.getHostAddress(), publishAddress);
if (opType == OpType.AND) {
if (match) {
// If we match, we can check to the next filter
continue;
}
return false;
}
if (match && opType == OpType.OR) {
return true;
}
} else if ("_host_ip".equals(attr)) {
// We check explicitly only the host_ip
boolean match = matchByIP(values, node.getHostAddress(), null);
if (opType == OpType.AND) {
if (match) {
// If we match, we can check to the next filter
continue;
}
return false;
}
if (match && opType == OpType.OR) {
return true;
}
} else if ("_publish_ip".equals(attr)) {
// We check explicitly only the publish_ip
String address = null;
if (node.getAddress() instanceof InetSocketTransportAddress) {
address = NetworkAddress.format(((InetSocketTransportAddress) node.getAddress()).address().getAddress());
}
boolean match = matchByIP(values, address, null);
if (opType == OpType.AND) {
if (match) {
// If we match, we can check to the next filter
continue;
}
return false;
}
if (match && opType == OpType.OR) {
return true;
}
} else if ("_host".equals(attr)) {
for (String value : values) {
if (Regex.simpleMatch(value, node.getHostName())) {
if (opType == OpType.OR) {
return true;
}
} else {
if (opType == OpType.AND) {
return false;
}
}
if (Regex.simpleMatch(value, node.getHostAddress())) {
if (opType == OpType.OR) {
return true;
}
} else {
if (opType == OpType.AND) {
return false;
}
}
}
} else if ("_id".equals(attr)) {
for (String value : values) {
if (node.getId().equals(value)) {
if (opType == OpType.OR) {
return true;
}
} else {
if (opType == OpType.AND) {
return false;
}
}
}
} else if ("_name".equals(attr) || "name".equals(attr)) {
for (String value : values) {
if (Regex.simpleMatch(value, node.getName())) {
if (opType == OpType.OR) {
return true;
}
} else {
if (opType == OpType.AND) {
return false;
}
}
}
} else {
String nodeAttributeValue = node.getAttributes().get(attr);
if (nodeAttributeValue == null) {
if (opType == OpType.AND) {
return false;
} else {
continue;
}
}
for (String value : values) {
if (Regex.simpleMatch(value, nodeAttributeValue)) {
if (opType == OpType.OR) {
return true;
}
} else {
if (opType == OpType.AND) {
return false;
}
}
}
}
}
if (opType == OpType.OR) {
return false;
} else {
return true;
}
}
/**
* Generates a human-readable string for the DiscoverNodeFilters.
* Example: {@code _id:"id1 OR blah",name:"blah OR name2"}
*/
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
int entryCount = filters.size();
for (Map.Entry entry : filters.entrySet()) {
String attr = entry.getKey();
String[] values = entry.getValue();
sb.append(attr);
sb.append(":\"");
int valueCount = values.length;
for (String value : values) {
sb.append(value);
if (valueCount > 1) {
sb.append(" ").append(opType.toString()).append(" ");
}
valueCount--;
}
sb.append("\"");
if (entryCount > 1) {
sb.append(",");
}
entryCount--;
}
return sb.toString();
}
}
