Java example source code file (SLF4JBridgeHandlerTest.java)

This example Java source code file (SLF4JBridgeHandlerTest.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

after, before, exception, illegalargumentexception, john, listappender, locationinfo, log, logger_name, logging, loggingevent, object, resourcebundle, slf4jbridgehandlertest, string, test, text, util

The SLF4JBridgeHandlerTest.java Java example source code

/**
 * Copyright (c) 2004-2011 QOS.ch
 * All rights reserved.
 *
 * Permission is hereby granted, free  of charge, to any person obtaining
 * a  copy  of this  software  and  associated  documentation files  (the
 * "Software"), to  deal in  the Software without  restriction, including
 * without limitation  the rights to  use, copy, modify,  merge, publish,
 * distribute,  sublicense, and/or sell  copies of  the Software,  and to
 * permit persons to whom the Software  is furnished to do so, subject to
 * the following conditions:
 *
 * The  above  copyright  notice  and  this permission  notice  shall  be
 * included in all copies or substantial portions of the Software.
 *
 * THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
 * EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
 * MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */
package org.slf4j.bridge;

import static org.junit.Assert.assertEquals;

import java.text.MessageFormat;
import java.util.ResourceBundle;
import java.util.logging.Level;

import org.apache.log4j.spi.LocationInfo;
import org.apache.log4j.spi.LoggingEvent;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

public class SLF4JBridgeHandlerTest {

    static String LOGGER_NAME = "yay";

    ListAppender listAppender = new ListAppender();
    org.apache.log4j.Logger log4jRoot;
    java.util.logging.Logger julLogger = java.util.logging.Logger.getLogger("yay");

    @Before
    public void setUp() throws Exception {
        listAppender.extractLocationInfo = true;
        log4jRoot = org.apache.log4j.Logger.getRootLogger();
        log4jRoot.addAppender(listAppender);
        log4jRoot.setLevel(org.apache.log4j.Level.TRACE);
    }

    @After
    public void tearDown() throws Exception {
        SLF4JBridgeHandler.uninstall();
        log4jRoot.getLoggerRepository().resetConfiguration();
    }

    @Test
    public void testSmoke() {
        SLF4JBridgeHandler.install();
        String msg = "msg";
        julLogger.info(msg);
        assertEquals(1, listAppender.list.size());
        LoggingEvent le = (LoggingEvent) listAppender.list.get(0);
        assertEquals(LOGGER_NAME, le.getLoggerName());
        assertEquals(msg, le.getMessage());

        // get the location info in the event.
        // Note that this must have been computed previously
        // within an appender for the following assertion to
        // work properly
        LocationInfo li = le.getLocationInformation();
        System.out.println(li.fullInfo);
        assertEquals("SLF4JBridgeHandlerTest.java", li.getFileName());
        assertEquals("testSmoke", li.getMethodName());
    }

    @Test
    public void testLevels() {
        SLF4JBridgeHandler.install();
        String msg = "msg";
        julLogger.setLevel(Level.ALL);

        julLogger.finest(msg);
        julLogger.finer(msg);
        julLogger.fine(msg);
        julLogger.info(msg);
        julLogger.warning(msg);
        julLogger.severe(msg);

        assertEquals(6, listAppender.list.size());
        int i = 0;
        assertLevel(i++, org.apache.log4j.Level.TRACE);
        assertLevel(i++, org.apache.log4j.Level.DEBUG);
        assertLevel(i++, org.apache.log4j.Level.DEBUG);
        assertLevel(i++, org.apache.log4j.Level.INFO);
        assertLevel(i++, org.apache.log4j.Level.WARN);
        assertLevel(i++, org.apache.log4j.Level.ERROR);
    }

    @Test
    public void testLogWithResourceBundle() {
        SLF4JBridgeHandler.install();

        String resourceBundleName = "org.slf4j.bridge.testLogStrings";
        ResourceBundle bundle = ResourceBundle.getBundle(resourceBundleName);
        String resourceKey = "resource_key";
        String expectedMsg = bundle.getString(resourceKey);
        String msg = resourceKey;

        java.util.logging.Logger julResourceBundleLogger = java.util.logging.Logger.getLogger("yay", resourceBundleName);

        julResourceBundleLogger.info(msg);
        assertEquals(1, listAppender.list.size());
        LoggingEvent le = (LoggingEvent) listAppender.list.get(0);
        assertEquals(LOGGER_NAME, le.getLoggerName());
        assertEquals(expectedMsg, le.getMessage());
    }

    @Test
    public void testLogWithResourceBundleWithParameters() {
        SLF4JBridgeHandler.install();

        String resourceBundleName = "org.slf4j.bridge.testLogStrings";
        ResourceBundle bundle = ResourceBundle.getBundle(resourceBundleName);

        java.util.logging.Logger julResourceBundleLogger = java.util.logging.Logger.getLogger("foo", resourceBundleName);

        String resourceKey1 = "resource_key_1";
        String expectedMsg1 = bundle.getString(resourceKey1);
        julResourceBundleLogger.info(resourceKey1); // 1st log

        String resourceKey2 = "resource_key_2";
        Object[] params2 = new Object[] { "foo", "bar" };
        String expectedMsg2 = MessageFormat.format(bundle.getString(resourceKey2), params2);
        julResourceBundleLogger.log(Level.INFO, resourceKey2, params2); // 2nd log

        String resourceKey3 = "invalidKey {0}";
        Object[] params3 = new Object[] { "John" };
        String expectedMsg3 = MessageFormat.format(resourceKey3, params3);
        julResourceBundleLogger.log(Level.INFO, resourceKey3, params3); // 3rd log

        julLogger.log(Level.INFO, resourceKey3, params3); // 4th log

        assertEquals(4, listAppender.list.size());

        LoggingEvent le = null;

        le = (LoggingEvent) listAppender.list.get(0);
        assertEquals("foo", le.getLoggerName());
        assertEquals(expectedMsg1, le.getMessage());

        le = (LoggingEvent) listAppender.list.get(1);
        assertEquals("foo", le.getLoggerName());
        assertEquals(expectedMsg2, le.getMessage());

        le = (LoggingEvent) listAppender.list.get(2);
        assertEquals("foo", le.getLoggerName());
        assertEquals(expectedMsg3, le.getMessage());

        le = (LoggingEvent) listAppender.list.get(3);
        assertEquals("yay", le.getLoggerName());
        assertEquals(expectedMsg3, le.getMessage());
    }

    @Test
    public void testLogWithPlaceholderNoParameters() {
        SLF4JBridgeHandler.install();
        String msg = "msg {non-number-string}";
        julLogger.logp(Level.INFO, "SLF4JBridgeHandlerTest", "testLogWithPlaceholderNoParameters", msg, new Object[0]);

        assertEquals(1, listAppender.list.size());
        LoggingEvent le = (LoggingEvent) listAppender.list.get(0);
        assertEquals(LOGGER_NAME, le.getLoggerName());
        assertEquals(msg, le.getMessage());
    }

    // See http://jira.qos.ch/browse/SLF4J-337

    @Test
    public void illFormattedInputShouldBeReturnedAsIs() {
        SLF4JBridgeHandler.install();
        String msg = "foo {18=bad} {0}";

        julLogger.log(Level.INFO, msg, "ignored parameter due to IllegalArgumentException");
        assertEquals(1, listAppender.list.size());
        LoggingEvent le = (LoggingEvent) listAppender.list.get(0);
        assertEquals(msg, le.getMessage());
    }

    void assertLevel(int index, org.apache.log4j.Level expectedLevel) {
        LoggingEvent le = (LoggingEvent) listAppender.list.get(index);
        assertEquals(expectedLevel, le.getLevel());
    }
}