com.palantir.curatortestrule.DefaultZooKeeperRuleConfig Maven / Gradle / Ivy

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This project provides a JUnit TestRule that manages the startup and shutdown of the underlying ZooKeeperServer. The TestRule also includes a way of getting CuratorFramework instances that automatically connect and disconnect from the underlying ZooKeeperServer based on the scope of rule.

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/*
 * Copyright 2014 Palantir Technologies, Inc. All rights reserved.
 *
 * 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.palantir.curatortestrule;

import java.io.File;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.util.Set;

import org.apache.commons.io.FileUtils;
import org.apache.zookeeper.server.ServerCnxnFactory;
import org.apache.zookeeper.server.ZooKeeperServer;
import org.apache.zookeeper.server.persistence.FileTxnSnapLog;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.common.collect.Sets;
import com.google.common.io.Files;

/**
 * Default implementation of {@link ZooKeeperRuleConfig} which uses a
 * {@link NoJMXZooKeeperServer} and uses temp directories for the {@link FileTxnSnapLog}.
 *
 * @author juang
 */
public final class DefaultZooKeeperRuleConfig implements ZooKeeperRuleConfig {
    private static final Logger LOGGER = LoggerFactory.getLogger(LocalZooKeeperRule.class);

    private final boolean cleanupOnExit;
    private final Set directoriesToCleanup = Sets.newConcurrentHashSet();

    public DefaultZooKeeperRuleConfig() {
        this(false);
    }

    public DefaultZooKeeperRuleConfig(boolean cleanupOnExit) {
        this.cleanupOnExit = cleanupOnExit;
    }

    @Override
    public ServerCnxnFactory getServer(int port) {
        ZooKeeperServer zkServer = new NoJMXZooKeeperServer();

        FileTxnSnapLog ftxn;
        try {
            File dataDir = Files.createTempDir();
            File snapDir = Files.createTempDir();
            if (cleanupOnExit) {
                directoriesToCleanup.add(dataDir);
                directoriesToCleanup.add(snapDir);
            }
            ftxn = new FileTxnSnapLog(dataDir, snapDir);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
        zkServer.setTxnLogFactory(ftxn);

        try {
            ServerCnxnFactory cnxnFactory = ServerCnxnFactory.createFactory();
            cnxnFactory.configure(new InetSocketAddress(port), cnxnFactory.getMaxClientCnxnsPerHost());
            cnxnFactory.startup(zkServer);

            return cnxnFactory;
        } catch (IOException | InterruptedException e) {
            throw new RuntimeException(e);
        }
    }

    @Override
    public void cleanup() {
        for (File dir : directoriesToCleanup) {
            try {
                FileUtils.deleteDirectory(dir);
            } catch (IOException e) {
                LOGGER.warn("Attempted to cleanup " + dir.getAbsolutePath() + " but cleanup failed.", e);
            }
        }
    }
}