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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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.apache.kafka.common.utils;
import org.apache.kafka.common.config.ConfigDef;
import org.apache.kafka.common.config.ConfigDef.ConfigKey;
import org.apache.kafka.common.config.ConfigDef.Type;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Set;
import java.util.stream.Collectors;
import java.util.stream.Stream;
public class ConfigUtils {
private static final Logger log = LoggerFactory.getLogger(ConfigUtils.class);
/**
* Translates deprecated configurations into their non-deprecated equivalents
*
* This is a convenience method for {@link ConfigUtils#translateDeprecatedConfigs(Map, Map)}
* until we can use Java 9+ {@code Map.of(..)} and {@code Set.of(...)}
*
* @param configs the input configuration
* @param aliasGroups An array of arrays of synonyms. Each synonym array begins with the non-deprecated synonym
* For example, new String[][] { { a, b }, { c, d, e} }
* would declare b as a deprecated synonym for a,
* and d and e as deprecated synonyms for c.
* The ordering of synonyms determines the order of precedence
* (e.g. the first synonym takes precedence over the second one)
* @return a new configuration map with deprecated keys translated to their non-deprecated equivalents
*/
public static Map translateDeprecatedConfigs(Map configs, String[][] aliasGroups) {
return translateDeprecatedConfigs(configs, Stream.of(aliasGroups)
.collect(Collectors.toMap(x -> x[0], x -> Stream.of(x).skip(1).collect(Collectors.toList()))));
}
/**
* Translates deprecated configurations into their non-deprecated equivalents
*
* @param configs the input configuration
* @param aliasGroups A map of config to synonyms. Each key is the non-deprecated synonym
* For example, Map.of(a , Set.of(b), c, Set.of(d, e))
* would declare b as a deprecated synonym for a,
* and d and e as deprecated synonyms for c.
* The ordering of synonyms determines the order of precedence
* (e.g. the first synonym takes precedence over the second one)
* @return a new configuration map with deprecated keys translated to their non-deprecated equivalents
*/
public static Map translateDeprecatedConfigs(Map configs,
Map> aliasGroups) {
Set aliasSet = Stream.concat(
aliasGroups.keySet().stream(),
aliasGroups.values().stream().flatMap(Collection::stream))
.collect(Collectors.toSet());
// pass through all configurations without aliases
Map newConfigs = configs.entrySet().stream()
.filter(e -> !aliasSet.contains(e.getKey()))
// filter out null values
.filter(e -> Objects.nonNull(e.getValue()))
.collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
aliasGroups.forEach((target, aliases) -> {
List deprecated = aliases.stream()
.filter(configs::containsKey)
.collect(Collectors.toList());
if (deprecated.isEmpty()) {
// No deprecated key(s) found.
if (configs.containsKey(target)) {
newConfigs.put(target, configs.get(target));
}
return;
}
String aliasString = String.join(", ", deprecated);
if (configs.containsKey(target)) {
// Ignore the deprecated key(s) because the actual key was set.
log.error(target + " was configured, as well as the deprecated alias(es) " +
aliasString + ". Using the value of " + target);
newConfigs.put(target, configs.get(target));
} else if (deprecated.size() > 1) {
log.error("The configuration keys " + aliasString + " are deprecated and may be " +
"removed in the future. Additionally, this configuration is ambigous because " +
"these configuration keys are all aliases for " + target + ". Please update " +
"your configuration to have only " + target + " set.");
newConfigs.put(target, configs.get(deprecated.get(0)));
} else {
log.warn("Configuration key " + deprecated.get(0) + " is deprecated and may be removed " +
"in the future. Please update your configuration to use " + target + " instead.");
newConfigs.put(target, configs.get(deprecated.get(0)));
}
});
return newConfigs;
}
public static String configMapToRedactedString(Map map, ConfigDef configDef) {
StringBuilder bld = new StringBuilder("{");
List keys = new ArrayList<>(map.keySet());
Collections.sort(keys);
String prefix = "";
for (String key : keys) {
bld.append(prefix).append(key).append("=");
ConfigKey configKey = configDef.configKeys().get(key);
if (configKey == null || configKey.type().isSensitive()) {
bld.append("(redacted)");
} else {
Object value = map.get(key);
if (value == null) {
bld.append("null");
} else if (configKey.type() == Type.STRING) {
bld.append("\"").append(value).append("\"");
} else {
bld.append(value);
}
}
prefix = ", ";
}
bld.append("}");
return bld.toString();
}
}
