com.xiaomi.linden.file.TestFileChangeWatcher.java Source code

Introduction

Here is the source code for com.xiaomi.linden.file.TestFileChangeWatcher.java

Source

// Copyright 2016 Xiaomi, Inc.
//
// Licensed 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 com.xiaomi.linden.file;

import java.io.File;
import java.io.IOException;
import java.util.concurrent.atomic.AtomicInteger;

import org.apache.commons.io.FileUtils;
import org.junit.After;
import org.junit.Assert;
import org.junit.Ignore;
import org.junit.Test;

import com.google.common.base.Charsets;
import com.google.common.base.Function;
import com.google.common.io.Files;

import com.xiaomi.linden.common.util.DirectoryChangeWatcher;
import com.xiaomi.linden.common.util.FileChangeWatcher;

@Ignore
public class TestFileChangeWatcher {

    private FileChangeWatcher fileChangeWatcher;
    private DirectoryChangeWatcher directoryChangeWatcher;

    @Test
    public void testFileChangeWatcher() throws IOException, InterruptedException {
        final AtomicInteger events = new AtomicInteger(0);
        final Function<String, Object> callback = new Function<String, Object>() {
            @Override
            public String apply(String absolutePath) {
                events.incrementAndGet();
                return null;
            }
        };

        File dir = new File("tmp");
        if (!dir.exists()) {
            dir.mkdir();
        }

        File file = new File("tmp/test.txt");
        file.createNewFile();

        fileChangeWatcher = new FileChangeWatcher(file.getAbsolutePath(), callback, 10);
        fileChangeWatcher.start();
        directoryChangeWatcher = new DirectoryChangeWatcher(dir.getAbsolutePath(), callback, 10);
        directoryChangeWatcher.start();

        Files.write("Hello", file, Charsets.UTF_8);
        Thread.sleep(10 * 1000);
        Assert.assertEquals(2, events.get());

        FileUtils.deleteQuietly(file);
        FileUtils.deleteDirectory(dir);
    }

    @After
    public void destroy() throws IOException {
        if (fileChangeWatcher != null) {
            fileChangeWatcher.close();
        }
        if (directoryChangeWatcher != null) {
            directoryChangeWatcher.close();
        }

    }
}