com.lambdaworks.redis.cluster.topology.TimedAsyncCommand Maven / Gradle / Ivy

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Advanced and thread-safe Java Redis client for synchronous, asynchronous, and reactive usage. Supports Cluster, Sentinel, Pipelining, Auto-Reconnect, Codecs and much more.

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/*
 * Copyright 2011-2016 the original author or authors.
 *
 * 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.lambdaworks.redis.cluster.topology;

import com.lambdaworks.redis.protocol.AsyncCommand;
import com.lambdaworks.redis.protocol.RedisCommand;

import io.netty.buffer.ByteBuf;

/**
 * Timed command that records the time at which the command was encoded and completed.
 *
 * @param  Key type
 * @param  Value type
 * @param  Result type
 * @author Mark Paluch
 */
class TimedAsyncCommand extends AsyncCommand {

    long encodedAtNs = -1;
    long completedAtNs = -1;

    public TimedAsyncCommand(RedisCommand command) {
        super(command);
    }

    @Override
    public void encode(ByteBuf buf) {
        completedAtNs = -1;
        encodedAtNs = -1;

        super.encode(buf);
        encodedAtNs = System.nanoTime();
    }

    @Override
    public void complete() {
        completedAtNs = System.nanoTime();
        super.complete();
    }

    public long duration() {
        if (completedAtNs == -1 || encodedAtNs == -1) {
            return -1;
        }
        return completedAtNs - encodedAtNs;
    }
}