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Add support for custom COAP requests logging
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| /* | ||
| * Copyright (C) 2022-2024 java-coap contributors (https://github.com/open-coap/java-coap) | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| * 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. | ||
| */ | ||
| package com.mbed.coap.server; | ||
|
|
||
| import com.mbed.coap.packet.CoapRequest; | ||
| import com.mbed.coap.packet.CoapResponse; | ||
| import com.mbed.coap.utils.Filter; | ||
| import com.mbed.coap.utils.Service; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
| import org.slf4j.MDC; | ||
| import org.slf4j.event.Level; | ||
| import org.slf4j.spi.LoggingEventBuilder; | ||
|
|
||
| import java.util.HashMap; | ||
| import java.util.Map; | ||
| import java.util.concurrent.CompletableFuture; | ||
| import java.util.function.BiFunction; | ||
| import java.util.function.Function; | ||
|
|
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| public class CoapRequestLogger implements Filter.SimpleFilter<CoapRequest, CoapResponse> { | ||
| private final LoggingEventBuilder loggingEventBuilder; | ||
| private final BiFunction<CoapRequest, CoapResponse, String> formatter; | ||
| private final Map<String, Function<CoapRequest, String>> mdcUpdaters; | ||
|
|
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| public CoapRequestLogger(Logger logger, Level level, BiFunction<CoapRequest, CoapResponse, String> formatter, Map<String, Function<CoapRequest, String>> mdcUpdaters) { | ||
| this.loggingEventBuilder = logger.atLevel(level); | ||
| this.formatter = formatter; | ||
| this.mdcUpdaters = mdcUpdaters; | ||
| } | ||
|
|
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| @Override | ||
| public CompletableFuture<CoapResponse> apply(CoapRequest req, Service<CoapRequest, CoapResponse> service) { | ||
| mdcUpdaters.forEach((key, updater) -> MDC.put(key, updater.apply(req))); | ||
| return service.apply(req).thenApply((resp) -> { | ||
| loggingEventBuilder.log(() -> formatter.apply(req, resp)); | ||
| mdcUpdaters.forEach((key, ___) -> MDC.remove(key)); | ||
| return resp; | ||
| }); | ||
| } | ||
|
|
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| public static CoapRequestLoggerBuilder builder() { | ||
| return new CoapRequestLoggerBuilder(); | ||
| } | ||
|
|
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| public static class CoapRequestLoggerBuilder { | ||
| private Logger logger = LoggerFactory.getLogger(CoapRequestLogger.class); | ||
| private Level level = Level.INFO; | ||
| private BiFunction<CoapRequest, CoapResponse, String> formatter = (req, resp) -> req.toString() + " -> " + resp.toString(); | ||
| private final Map<String, Function<CoapRequest, String>> mdcUpdaters = new HashMap<>(); | ||
|
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| public CoapRequestLoggerBuilder logger(Logger logger) { | ||
| this.logger = logger; | ||
| return this; | ||
| } | ||
|
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| public CoapRequestLoggerBuilder level(Level level) { | ||
| this.level = level; | ||
| return this; | ||
| } | ||
|
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| public CoapRequestLoggerBuilder formatter(BiFunction<CoapRequest, CoapResponse, String> formatter) { | ||
| this.formatter = formatter; | ||
| return this; | ||
| } | ||
|
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| public CoapRequestLoggerBuilder mdc(String key, Function<CoapRequest, String> updater) { | ||
| mdcUpdaters.put(key, updater); | ||
| return this; | ||
| } | ||
|
|
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| public CoapRequestLogger build() { | ||
| return new CoapRequestLogger(logger, level, formatter, mdcUpdaters); | ||
| } | ||
| } | ||
| } | ||
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