Java tutorial
/** * Copyright 2015 Groupon.com * * 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.arpnetworking.logback.serialization; import ch.qos.logback.classic.spi.ILoggingEvent; import com.arpnetworking.logback.StenoEncoder; import com.fasterxml.jackson.core.JsonFactory; import com.fasterxml.jackson.core.JsonProcessingException; import com.fasterxml.jackson.databind.ObjectMapper; /** * Serialization strategy for object based message specifications. * * @author Ville Koskela (vkoskela at groupon dot com) * @since 1.3.1 */ public class ObjectSerialziationStrategy { /** * Public constructor. * * @param encoder Instance of <code>StenoEncoder</code>. * @param jsonFactory Instance of <code>JsonFactory</code>. * @param objectMapper Instance of <code>ObjectMapper</code>. */ public ObjectSerialziationStrategy(final StenoEncoder encoder, final JsonFactory jsonFactory, final ObjectMapper objectMapper) { _objectMapper = objectMapper; _objectAsJsonStrategy = new ObjectAsJsonSerialziationStrategy(encoder, jsonFactory, objectMapper); } /** * Serialize an event. * * @param event The event. * @param eventName The event name. * @param data The message data <code>Object</code>. * @return Serialization of message as a <code>String</code>. */ public String serialize(final ILoggingEvent event, final String eventName, final Object data) { final String jsonData; try { jsonData = data == null ? null : _objectMapper.writeValueAsString(data); } catch (final JsonProcessingException e) { return "Unknown exception: " + e.getMessage(); } return _objectAsJsonStrategy.serialize(event, eventName, jsonData); } private final ObjectMapper _objectMapper; private final ObjectAsJsonSerialziationStrategy _objectAsJsonStrategy; }