com.netflix.exhibitor.core.index.ZooKeeperLogFiles.java Source code

Introduction

Here is the source code for com.netflix.exhibitor.core.index.ZooKeeperLogFiles.java

Source

/*
 * Copyright 2012 Netflix, 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.netflix.exhibitor.core.index;

import com.google.common.collect.ImmutableList;
import com.google.common.collect.Lists;
import com.google.common.io.Closeables;
import com.netflix.exhibitor.core.Exhibitor;
import com.netflix.exhibitor.core.config.StringConfigs;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.List;

public class ZooKeeperLogFiles {
    private final List<File> paths;
    private final boolean isValid;

    public static File getDataDir(Exhibitor exhibitor) {
        String path = exhibitor.getConfigManager().getConfig().getString(StringConfigs.ZOOKEEPER_LOG_DIRECTORY);
        if ((path == null) || (path.trim().length() == 0)) {
            path = exhibitor.getConfigManager().getConfig().getString(StringConfigs.ZOOKEEPER_DATA_DIRECTORY);
        }
        return new File(path, "version-2");
    }

    public ZooKeeperLogFiles(Exhibitor exhibitor) throws Exception {
        ImmutableList.Builder<File> builder = ImmutableList.builder();

        File path = getDataDir(exhibitor);
        isValid = path.isDirectory();
        if (isValid) {
            File[] logs = path.listFiles();
            if (logs != null) {
                for (File f : logs) {
                    if (isLogFile(f)) {
                        builder.add(f);
                    }
                }
            }
        }

        paths = builder.build();
    }

    public boolean isValid() {
        return isValid;
    }

    public List<File> getPaths() {
        return Lists.newArrayList(paths);
    }

    private boolean isLogFile(File f) throws Exception {
        InputStream log = new BufferedInputStream(new FileInputStream(f));
        try {
            ZooKeeperLogParser logParser = new ZooKeeperLogParser(log);
            return logParser.isValid();
        } finally {
            Closeables.closeQuietly(log);
        }
    }
}