com.moilioncircle.redis.replicator.cmd.parser.XGroupParser Maven / Gradle / Ivy

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Redis Replicator is a redis RDB and Command parser written in java. It can parse,filter,broadcast the RDB and Command events in a real time manner. It also can synchronize redis data to your local cache or to database.

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/*
 * Copyright 2016-2018 Leon Chen
 *
 * 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.moilioncircle.redis.replicator.cmd.parser;

import com.moilioncircle.redis.replicator.cmd.CommandParser;
import com.moilioncircle.redis.replicator.cmd.impl.XGroupCommand;
import com.moilioncircle.redis.replicator.cmd.impl.XGroupCreateCommand;
import com.moilioncircle.redis.replicator.cmd.impl.XGroupDelConsumerCommand;
import com.moilioncircle.redis.replicator.cmd.impl.XGroupDestroyCommand;
import com.moilioncircle.redis.replicator.cmd.impl.XGroupSetIdCommand;

import static com.moilioncircle.redis.replicator.cmd.CommandParsers.toBytes;
import static com.moilioncircle.redis.replicator.cmd.CommandParsers.toRune;
import static com.moilioncircle.redis.replicator.util.Strings.isEquals;

/**
 * @author Leon Chen
 * @since 2.6.0
 */
public class XGroupParser implements CommandParser {
    @Override
    public XGroupCommand parse(Object[] command) {
        int idx = 1;
        String next = toRune(command[idx++]);
        if (isEquals(next, "CREATE")) {
            String key = toRune(command[idx]);
            byte[] rawKey = toBytes(command[idx]);
            idx++;
            String group = toRune(command[idx]);
            byte[] rawGroup = toBytes(command[idx]);
            idx++;
            String id = toRune(command[idx]);
            byte[] rawId = toBytes(command[idx]);
            idx++;
            if (idx >= command.length) {
                return new XGroupCreateCommand(key, group, id, false, rawKey, rawGroup, rawId);
            } else {
                next = toRune(command[idx++]);
                if (isEquals(next, "MKSTREAM")) {
                    return new XGroupCreateCommand(key, group, id, true, rawKey, rawGroup, rawId);
                } else {
                    throw new UnsupportedOperationException(next);
                }
            }
        } else if (isEquals(next, "SETID")) {
            String key = toRune(command[idx]);
            byte[] rawKey = toBytes(command[idx]);
            idx++;
            String group = toRune(command[idx]);
            byte[] rawGroup = toBytes(command[idx]);
            idx++;
            String id = toRune(command[idx]);
            byte[] rawId = toBytes(command[idx]);
            idx++;
            return new XGroupSetIdCommand(key, group, id, rawKey, rawGroup, rawId);
        } else if (isEquals(next, "DESTROY")) {
            String key = toRune(command[idx]);
            byte[] rawKey = toBytes(command[idx]);
            idx++;
            String group = toRune(command[idx]);
            byte[] rawGroup = toBytes(command[idx]);
            idx++;
            return new XGroupDestroyCommand(key, group, rawKey, rawGroup);
        } else if (isEquals(next, "DELCONSUMER")) {
            String key = toRune(command[idx]);
            byte[] rawKey = toBytes(command[idx]);
            idx++;
            String group = toRune(command[idx]);
            byte[] rawGroup = toBytes(command[idx]);
            idx++;
            String consumer = toRune(command[idx]);
            byte[] rawConsumer = toBytes(command[idx]);
            idx++;
            return new XGroupDelConsumerCommand(key, group, consumer, rawKey, rawGroup, rawConsumer);
        } else {
            throw new UnsupportedOperationException(next);
        }
    }
}