com.moilioncircle.redis.replicator.cmd.impl.EvalParser Maven / Gradle / Ivy

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Redis Replicator implement Redis Replication protocol written in java. It can parse,filter,broadcast the RDB and AOF 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 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.impl;

import com.moilioncircle.redis.replicator.cmd.Command;
import com.moilioncircle.redis.replicator.cmd.CommandName;
import com.moilioncircle.redis.replicator.cmd.CommandParser;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

/**
 * Created by leon on 8/14/16.
 */
public class EvalParser implements CommandParser {
    @Override
    public EvalCommand parse(CommandName cmdName, Object[] params) {
        int idx = 0;
        String script = (String) params[idx++];
        int numkeys = Integer.parseInt((String) params[idx++]);
        String[] keys = new String[numkeys];
        for (int i = 0; i < numkeys; i++) {
            keys[i] = (String) params[idx++];
        }
        List list = new ArrayList<>();
        while (idx < params.length) {
            list.add((String) params[idx++]);
        }
        String[] args = new String[list.size()];
        list.toArray(args);
        return new EvalCommand(script, numkeys, keys, args);
    }

    public static class EvalCommand implements Command {
        public final String script;
        public final int numkeys;
        public final String[] keys;
        public final String[] args;

        public EvalCommand(String script, int numkeys, String[] keys, String[] args) {
            this.script = script;
            this.numkeys = numkeys;
            this.keys = keys;
            this.args = args;
        }

        @Override
        public String toString() {
            return "EvalCommand{" +
                    "script='" + script + '\'' +
                    ", numkeys=" + numkeys +
                    ", keys=" + Arrays.toString(keys) +
                    ", args=" + Arrays.toString(args) +
                    '}';
        }

        @Override
        public CommandName name() {
            return CommandName.name("EVAL");
        }
    }
}