/**
* Logback: the reliable, generic, fast and flexible logging framework.
* Copyright (C) 1999-2013, QOS.ch. All rights reserved.
*
* This program and the accompanying materials are dual-licensed under
* either the terms of the Eclipse Public License v1.0 as published by
* the Eclipse Foundation
*
* or (per the licensee's choosing)
*
* under the terms of the GNU Lesser General Public License version 2.1
* as published by the Free Software Foundation.
*/
package ch.qos.logback.classic;
import java.io.*;
import ch.qos.logback.core.util.CoreTestConstants;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.slf4j.LoggerFactory;
import static junit.framework.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
public class LoggerSerializationTest {
static final String SERIALIZATION_PREFIX = CoreTestConstants.TEST_INPUT_PREFIX+"/serialization/";
// force SLF4J initialization for subsequent Logger readResolce ooperaiton
org.slf4j.Logger unused = LoggerFactory.getLogger(this.getClass());
LoggerContext lc;
Logger logger;
ByteArrayOutputStream bos;
ObjectOutputStream oos;
ObjectInputStream inputStream;
@Before
public void setUp() throws Exception {
lc = new LoggerContext();
lc.setName("testContext");
logger = lc.getLogger(LoggerSerializationTest.class);
// create the byte output stream
bos = new ByteArrayOutputStream();
oos = new ObjectOutputStream(bos);
}
@After
public void tearDown() throws Exception {
lc = null;
logger = null;
}
@Test
public void basicSerialization() throws IOException, ClassNotFoundException {
Foo foo = new Foo(logger);
foo.doFoo();
Foo fooBack = writeAndRead(foo);
fooBack.doFoo();
}
@Test
public void deepTreeSerialization() throws IOException {
// crate a tree of loggers under "aaaaaaaa"
Logger a = lc.getLogger("aaaaaaaa");
lc.getLogger("aaaaaaaa.a");
lc.getLogger("aaaaaaaa.a.a");
lc.getLogger("aaaaaaaa.a.b");
lc.getLogger("aaaaaaaa.a.c");
lc.getLogger("aaaaaaaa.a.d");
lc.getLogger("aaaaaaaa.b");
lc.getLogger("aaaaaaaa.b.a");
lc.getLogger("aaaaaaaa.b.b");
lc.getLogger("aaaaaaaa.b.c");
lc.getLogger("aaaaaaaa.b.d");
lc.getLogger("aaaaaaaa.c");
lc.getLogger("aaaaaaaa.c.a");
lc.getLogger("aaaaaaaa.c.b");
lc.getLogger("aaaaaaaa.c.c");
lc.getLogger("aaaaaaaa.c.d");
lc.getLogger("aaaaaaaa.d");
lc.getLogger("aaaaaaaa.d.a");
lc.getLogger("aaaaaaaa.d.b");
lc.getLogger("aaaaaaaa.d.c");
lc.getLogger("aaaaaaaa.d.d");
Logger b = lc.getLogger("b");
writeObject(oos, a);
oos.close();
int sizeA = bos.size();
bos = new ByteArrayOutputStream();
oos = new ObjectOutputStream(bos);
writeObject(oos, b);
oos.close();
int sizeB = bos.size();
assertTrue("serialized logger should be less than 100 bytes", sizeA < 100);
// logger tree should not influnce serialization
assertTrue("serialized loggers should be nearly the same size a:" + sizeA + ", sizeB:" + sizeB, (sizeA - sizeB) < 10);
}
private Foo writeAndRead(Foo foo) throws IOException,
ClassNotFoundException {
writeObject(oos, foo);
ByteArrayInputStream bis = new ByteArrayInputStream(bos.toByteArray());
inputStream = new ObjectInputStream(bis);
Foo fooBack = readFooObject(inputStream);
inputStream.close();
return fooBack;
}
Foo readFooObject(ObjectInputStream inputStream) throws IOException, ClassNotFoundException {
return (Foo) readObject(inputStream);
}
private Object readObject(ObjectInputStream inputStream) throws IOException, ClassNotFoundException {
return inputStream.readObject();
}
private void writeObject(ObjectOutputStream oos, Object o) throws IOException {
oos.writeObject(o);
oos.flush();
oos.close();
}
@Test
public void testCompatibilityWith_v1_0_11 () throws IOException, ClassNotFoundException {
FileInputStream fis = new FileInputStream(SERIALIZATION_PREFIX+"logger_v1.0.11.ser");
ObjectInputStream ois = new ObjectInputStream(fis);
Logger a = (Logger) ois.readObject();
ois.close();
assertEquals("a", a.getName());
}
// interestingly enough, logback 1.0.11 and earlier can also read loggers serialized by 1.0.12.
// fields not serialized are set to their default values and since the fields are not
// used, it works out nicely
@Test
public void testCompatibilityWith_v1_0_12 () throws IOException, ClassNotFoundException {
FileInputStream fis = new FileInputStream(SERIALIZATION_PREFIX+"logger_v1.0.12.ser");
ObjectInputStream ois = new ObjectInputStream(fis);
Logger a = (Logger) ois.readObject();
ois.close();
assertEquals("a", a.getName());
}
}