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KYLO-3162: Created LoggingUtil to handle dynameic logging. Added logi…
…n/logout logging.
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commons/commons-util/src/main/java/com/thinkbiganalytics/logging/LoggingUtil.java
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| /** | ||
| * | ||
| */ | ||
| package com.thinkbiganalytics.logging; | ||
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| /*- | ||
| * #%L | ||
| * kylo-commons-util | ||
| * %% | ||
| * Copyright (C) 2017 - 2018 ThinkBig Analytics, a Teradata Company | ||
| * %% | ||
| * Licensed 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. | ||
| * #L% | ||
| */ | ||
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| import org.slf4j.Logger; | ||
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| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import java.util.function.BiConsumer; | ||
| import java.util.function.Function; | ||
| import java.util.regex.Matcher; | ||
| import java.util.regex.Pattern; | ||
| import java.util.stream.Stream; | ||
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| /** | ||
| * | ||
| */ | ||
| public class LoggingUtil { | ||
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| public enum LogLevel { | ||
| ERROR(logger -> (msg, args) -> logger.error(msg, args)), | ||
| WARN(logger -> (msg, args) -> logger.warn(msg, args)), | ||
| INFO(logger -> (msg, args) -> logger.info(msg, args)), | ||
| DEBUG(logger -> (msg, args) -> logger.debug(msg, args)), | ||
| TRACE(logger -> (msg, args) -> logger.trace(msg, args)); | ||
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| private final Function<Logger, BiConsumer<String, Object[]>> loggingFunc; | ||
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| LogLevel(Function<Logger, BiConsumer<String, Object[]>> func) { | ||
| loggingFunc = func; | ||
| } | ||
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| public static LogLevel level(String value) { | ||
| return LogLevel.valueOf(value.toUpperCase()); | ||
| } | ||
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| public void log(Logger logger, String message, Object... args) { | ||
| loggingFunc.apply(logger).accept(message, args); | ||
| } | ||
| } | ||
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| private static final String TOKEN_REGEX = "\\{\\s*(\\w+)\\s*\\}"; | ||
| private static final Pattern TOKENS_PATTERN = Pattern.compile("\\s*" + TOKEN_REGEX + "\\s*", Pattern.CASE_INSENSITIVE); | ||
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| public static void log(Logger logger, LogLevel level, String message, Object... args) { | ||
| level.log(logger, message, args); | ||
| } | ||
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| public static <E extends Enum<E>> void log(Logger logger, LogLevel level, Class<E> tokensType, String message, Function<E, Object> tokenValueFunct) { | ||
| log(logger, level, tokensType, message, null, tokenValueFunct); | ||
| } | ||
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| public static <E extends Enum<E>> void log(Logger logger, LogLevel level, Class<E> tokensType, String message, Throwable th, Function<E, Object> tokenValueFunct) { | ||
| String logMsg = toLogMessage(message); | ||
| Object[] args = extractArguments(tokensType, message, th, tokenValueFunct); | ||
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| level.log(logger, logMsg, args); | ||
| } | ||
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| public static <E extends Enum<E>> Object[] extractArguments(Class<E> tokensType, String message, Function<E, Object> tokenValueFunct) { | ||
| return extractTokens(tokensType, message).stream() | ||
| .map(tokenValueFunct) | ||
| .toArray(Object[]::new); | ||
| } | ||
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| public static <E extends Enum<E>> Object[] extractArguments(Class<E> tokensType, String message, Throwable th, Function<E, Object> tokenValueFunct) { | ||
| return Stream.concat(extractTokens(tokensType, message).stream().map(tokenValueFunct), | ||
| th != null ? Stream.of(th) : Stream.empty()) | ||
| .toArray(Object[]::new); | ||
| } | ||
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| public static <E extends Enum<E>> Object[] deriveArguments(List<E> tokens, Function<E, Object> tokenValueFunct) { | ||
| return tokens.stream() | ||
| .map(tokenValueFunct) | ||
| .toArray(Object[]::new); | ||
| } | ||
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| public static <E extends Enum<E>> Object[] deriveArguments(List<E> tokens, Throwable th, Function<E, Object> tokenValueFunct) { | ||
| return Stream.concat(tokens.stream().map(tokenValueFunct), | ||
| Stream.of(th)) | ||
| .toArray(Object[]::new); | ||
| } | ||
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| public static <E extends Enum<E>> List<E> extractTokens(Class<E> tokensType, String message) { | ||
| List<E> tokens = new ArrayList<>(); | ||
| Matcher matcher = TOKENS_PATTERN.matcher(message); | ||
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| while (matcher.find()) { | ||
| String token = matcher.group(1).toUpperCase(); | ||
| try { | ||
| tokens.add(Enum.valueOf(tokensType, token)); | ||
| } catch (IllegalArgumentException e) { | ||
| throw new IllegalArgumentException("Unsupported logging field name: " + token); | ||
| } | ||
| } | ||
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| return tokens; | ||
| } | ||
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| public static String toLogMessage(String message) { | ||
| return message.replaceAll(TOKEN_REGEX, "{}"); | ||
| } | ||
| } |
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