LoggerSerializationTest xref

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    1   /**
    2    * Copyright (c) 2004-2011 QOS.ch
    3    * All rights reserved.
    4    *
    5    * Permission is hereby granted, free  of charge, to any person obtaining
    6    * a  copy  of this  software  and  associated  documentation files  (the
    7    * "Software"), to  deal in  the Software without  restriction, including
    8    * without limitation  the rights to  use, copy, modify,  merge, publish,
    9    * distribute,  sublicense, and/or sell  copies of  the Software,  and to
    10   * permit persons to whom the Software  is furnished to do so, subject to
    11   * the following conditions:
    12   *
    13   * The  above  copyright  notice  and  this permission  notice  shall  be
    14   * included in all copies or substantial portions of the Software.
    15   *
    16   * THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
    17   * EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
    18   * MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
    19   * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
    20   * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
    21   * OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
    22   * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
    23   *
    24   */
    25  package org.slf4j.issue;
    26
    27  import java.io.ByteArrayInputStream;
    28  import java.io.ByteArrayOutputStream;
    29  import java.io.IOException;
    30  import java.io.InputStream;
    31  import java.io.ObjectInputStream;
    32  import java.io.ObjectOutputStream;
    33  import java.io.Serializable;
    34
    35  import static org.junit.Assert.assertNotNull;
    36
    37  import org.junit.Test;
    38  import org.slf4j.Logger;
    39  import org.slf4j.LoggerFactory;
    40
    41  /**
    42   * See http://jira.qos.ch/browse/SLF4J-252
    43   * @author Thorbjorn Ravn Andersen
    44   */
    45  public class LoggerSerializationTest {
    46
    47      static class LoggerHolder implements Serializable {
    48          private static final long serialVersionUID = 1L;
    49
    50          private Logger log = LoggerFactory.getLogger(LoggerHolder.class);
    51
    52          public String toString() {
    53              return "log=" + getLog();
    54          }
    55
    56          public Logger getLog() {
    57              return log;
    58          }
    59      }
    60
    61      @Test
    62      public void testCanLoggerBeSerialized() throws IOException, ClassNotFoundException {
    63
    64          LoggerHolder lh1 = new LoggerHolder();
    65
    66          ByteArrayOutputStream baos = new ByteArrayOutputStream();
    67          ObjectOutputStream out = new ObjectOutputStream(baos);
    68          out.writeObject(lh1);
    69          out.close();
    70
    71          lh1 = null;
    72
    73          byte[] serializedLoggerHolder = baos.toByteArray();
    74
    75          InputStream is = new ByteArrayInputStream(serializedLoggerHolder);
    76          ObjectInputStream in = new ObjectInputStream(is);
    77          LoggerHolder lh2 = (LoggerHolder) in.readObject();
    78
    79          assertNotNull(lh2);
    80          assertNotNull(lh2.getLog());
    81          lh2.getLog().info("You must see this message as a log message");
    82      }
    83
    84  }