log4j-core/src/test/java/org/apache/logging/log4j/core/appender/rolling/RollingAppenderCustomDeleteActionTest.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.logging.log4j.core.appender.rolling;

import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;

import java.io.File;
import java.util.Arrays;
import java.util.regex.Pattern;

import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.core.junit.LoggerContextRule;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.RuleChain;

/**
 *
 */
public class RollingAppenderCustomDeleteActionTest {

    private static final String CONFIG = "log4j-rolling-with-custom-delete.xml";
    private static final String DIR = "target/rolling-with-delete/test";

    private final LoggerContextRule loggerContextRule = LoggerContextRule.createShutdownTimeoutLoggerContextRule(CONFIG);

    @Rule
    public RuleChain chain = loggerContextRule.withCleanFoldersRule(DIR);

    @Test
    public void testAppender() throws Exception {
        final Logger logger = loggerContextRule.getLogger();
        // Trigger the rollover
        for (int i = 0; i < 10; ++i) {
            // 30 chars per message: each message triggers a rollover
            logger.debug("This is a test message number " + i); // 30 chars:
        }
        Thread.sleep(100); // Allow time for rollover to complete

        final File dir = new File(DIR);
        assertTrue("Dir " + DIR + " should exist", dir.exists());
        assertTrue("Dir " + DIR + " should contain files", dir.listFiles().length > 0);

        final int MAX_TRIES = 20;
        for (int i = 0; i < MAX_TRIES; i++) {
            final File[] files = dir.listFiles();
            for (final File file : files) {
                System.out.println(file);
            }
            if (files.length == 3) {
                for (final File file : files) {
                    assertTrue("test-4.log should have been deleted",
                            Arrays.asList("test-1.log", "test-2.log", "test-3.log").contains(file.getName()));
                }
                return; // test succeeded
            }
            logger.debug("Adding additional event " + i);
            Thread.sleep(100); // Allow time for rollover to complete
        }
        fail("No rollover files found");
    }

    public static void main(final String[] args) {
        final Pattern p = Pattern.compile("test-.?[2,4,6,8,0]\\.log\\.gz");
        for (int i = 0; i < 16; i++) {
            final String str = "test-" + i + ".log.gz";
            final java.util.regex.Matcher m = p.matcher(str);
            System.out.println(m.matches() + ": " + str);
        }
    }
}