org.tinygroup.remoteconfig.zk.client.ZKDefaultEnvManager Maven / Gradle / Ivy

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/**
 * Copyright (c) 2012-2016, www.tinygroup.org ([email protected]).
 *
 *  Licensed under the GPL, Version 3.0 (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.gnu.org/licenses/gpl.html
 *
 *  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.tinygroup.remoteconfig.zk.client;

import org.apache.commons.lang.StringUtils;
import org.apache.zookeeper.CreateMode;
import org.apache.zookeeper.KeeperException;
import org.apache.zookeeper.ZooDefs;
import org.apache.zookeeper.data.Stat;
import org.tinygroup.exception.BaseRuntimeException;
import org.tinygroup.logger.LogLevel;
import org.tinygroup.remoteconfig.config.Environment;
import org.tinygroup.remoteconfig.zk.utils.EnvPathHelper;
import org.tinygroup.remoteconfig.zk.utils.PathHelper;
import org.tinygroup.remoteconfig.zk.utils.SerializeUtil;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class ZKDefaultEnvManager extends BaseManager {

    public static Environment get(String key) {
        try {
            key = EnvPathHelper.createPath(key);
            return getSimple(key);
        } catch (KeeperException e) {
            throw new BaseRuntimeException("0TE120119003", e, key);
        } catch (InterruptedException e) {
            throw new BaseRuntimeException("0TE120119004", e, key);
        }
    }

    public static Map getAll() {
        Map dataMap = new HashMap();
        String node = EnvPathHelper.createPath("");
        LOGGER.logMessage(LogLevel.DEBUG, String.format("远程配置，批量获取环境[%s]", node));
        try {
            List subNodes = zooKeeper.getChildren(node, false);
            if (subNodes != null && !subNodes.isEmpty()) {
                for (String subNode : subNodes) {
                    Environment environment = getSimple(node.concat("/").concat(subNode));
                    if (environment != null) {
                        dataMap.put(subNode, environment);
                    }
                }
            }
        } catch (KeeperException e) {
            //当没有找到子项时，会抛出此异常，我们不做任何处理
        } catch (InterruptedException e) {
            throw new BaseRuntimeException("0TE120119006", e, node);
        }
        return dataMap;
    }

    public static void set(String key, Environment environment) {
        key = EnvPathHelper.createPath(key);
        try {
            Stat stat = zooKeeper.exists(key, false);
            if (stat == null) {
                addSimple(key, environment);
                return;
            }
            zooKeeper.setData(key, SerializeUtil.serialize(environment), stat.getVersion());
        } catch (Exception e) {
            throw new BaseRuntimeException("0TE120119002", e, key, environment);
        }
    }

    private static Stat addSimple(String node, Environment environment) throws BaseRuntimeException {
        try {
            Stat stat = zooKeeper.exists(node, false);
            if (stat == null) {
                //  create parent znodePath
                String parentPath = PathHelper.generateParentPath(node);
                if (StringUtils.isNotBlank(parentPath)) {
                    Stat parentStat = zooKeeper.exists(parentPath, false);
                    if (parentStat == null) {
                        throw new BaseRuntimeException("0TE120119013", node);
                    }
                }
                zooKeeper.create(node, SerializeUtil.serialize(environment), ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
            }
            return zooKeeper.exists(node, true);
        } catch (KeeperException e) {
            throw new BaseRuntimeException("0TE120119011", e, node, environment);
        } catch (InterruptedException e) {
            throw new BaseRuntimeException("0TE120119012", e, node, environment);
        }
    }

    private static Environment getSimple(String key) throws KeeperException, InterruptedException {
        Stat stat = zooKeeper.exists(key, false);
        if (stat != null) {
            byte[] resultData = zooKeeper.getData(key, false, stat);
            if (resultData != null) {
                return SerializeUtil.unserialize(resultData);
            }
        }
        return null;
    }

    public static void delete(String key) {
        key = EnvPathHelper.createPath(key);
        try {
            Stat stat = zooKeeper.exists(key, false);
            if (stat != null) {
                zooKeeper.delete(key, stat.getVersion());
            }
        } catch (KeeperException e) {
            throw new BaseRuntimeException("0TE120119007", e, key);
        } catch (InterruptedException e) {
            throw new BaseRuntimeException("0TE120119008", e, key);
        }
    }

}