Schm1tz1 commented on code in PR #12992: URL: https://github.com/apache/kafka/pull/12992#discussion_r1158353376
########## clients/src/main/java/org/apache/kafka/common/config/provider/EnvVarConfigProvider.java: ########## @@ -0,0 +1,115 @@ +/* + * 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.config.provider; + +import org.apache.kafka.common.config.ConfigData; +import org.apache.kafka.common.config.ConfigException; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.io.IOException; +import java.util.HashMap; +import java.util.Map; +import java.util.Set; +import java.util.regex.Pattern; +import java.util.stream.Collectors; + +public class EnvVarConfigProvider implements ConfigProvider { + + public static final String ALLOWLIST_PATTERN_CONFIG = "allowlist.pattern"; + public static final String ALLOWLIST_PATTERN_CONFIG_DOC = "A pattern / regular expression that needs to match for environment variables" + + " to be used by this config provider."; + private final Map<String, String> envVarMap; + private Map<String, String> filteredEnvVarMap; + private Pattern envVarPattern; + + public EnvVarConfigProvider() { + envVarMap = getEnvVars(); + } + + public EnvVarConfigProvider(Map<String, String> envVarsAsArgument) { + envVarMap = envVarsAsArgument; + } + + private static final Logger log = LoggerFactory.getLogger(EnvVarConfigProvider.class); + + @Override + public void configure(Map<String, ?> configs) { + if (configs.containsKey(ALLOWLIST_PATTERN_CONFIG)) { + envVarPattern = Pattern.compile( + String.valueOf(configs.get(ALLOWLIST_PATTERN_CONFIG)) + ); + } else { + envVarPattern = Pattern.compile(".*"); + log.info("No pattern for environment variables provided. Using default pattern '(.*)'."); + } + + filteredEnvVarMap = envVarMap.entrySet().stream() + .filter(envVar -> envVarPattern.matcher(envVar.getKey()).matches()) + .collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue) + ); + } + + @Override + public void close() throws IOException { + } + + /** + * @param s unused + * @return returns environment variables as configuration + */ + @Override + public ConfigData get(String s) { + return get(s, null); + } + + /** + * @param path path, not used for environment variables + * @param keys the keys whose values will be retrieved. + * @return the configuration data. + */ + @Override + public ConfigData get(String path, Set<String> keys) { + + if (path != null && !path.isEmpty()) { + log.error("Path is not supported for EnvVarConfigProvider, invalid value '{}'", path); + throw new ConfigException("Path is not supported for EnvVarConfigProvider, invalid value '" + path + "'"); + } + + if (envVarMap == null) { Review Comment: True - needed to double-check but you are right! -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: jira-unsubscr...@kafka.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
