View Javadoc

    1   /*
    2    * Licensed to the Apache Software Foundation (ASF) under one or more
    3    * contributor license agreements. See the NOTICE file distributed with
    4    * this work for additional information regarding copyright ownership.
    5    * The ASF licenses this file to You under the Apache license, Version 2.0
    6    * (the "License"); you may not use this file except in compliance with
    7    * the License. You may obtain a copy of the License at
    8    *
    9    *      http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the license for the specific language governing permissions and
    15   * limitations under the license.
    16   */
    17  package org.apache.logging.log4j.core.layout;
    18
    19  import java.nio.charset.Charset;
    20
    21  import org.apache.logging.log4j.core.LogEvent;
    22  import org.apache.logging.log4j.util.Strings;
    23
    24  import com.fasterxml.jackson.core.JsonProcessingException;
    25  import com.fasterxml.jackson.databind.ObjectWriter;
    26
    27  abstract class AbstractJacksonLayout extends AbstractStringLayout {
    28
    29      private static final long serialVersionUID = 1L;
    30      protected static final String DEFAULT_EOL = "\r\n";
    31      protected static final String COMPACT_EOL = Strings.EMPTY;
    32      protected final String eol;
    33      protected final ObjectWriter objectWriter;
    34      protected final boolean compact;
    35      protected final boolean complete;
    36
    37      protected AbstractJacksonLayout(final ObjectWriter objectWriter, final Charset charset, final boolean compact, final boolean complete, boolean eventEol) {
    38          super(charset);
    39          this.objectWriter = objectWriter;
    40          this.compact = compact;
    41          this.complete = complete;
    42          this.eol = compact && !eventEol ? COMPACT_EOL : DEFAULT_EOL;
    43      }
    44
    45      /**
    46       * Formats a {@link org.apache.logging.log4j.core.LogEvent}.
    47       *
    48       * @param event The LogEvent.
    49       * @return The XML representation of the LogEvent.
    50       */
    51      @Override
    52      public String toSerializable(final LogEvent event) {
    53          try {
    54              return this.objectWriter.writeValueAsString(event) + eol;
    55          } catch (final JsonProcessingException e) {
    56              // Should this be an ISE or IAE?
    57              LOGGER.error(e);
    58              return Strings.EMPTY;
    59          }
    60      }
    61
    62  }