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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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package io.lettuce.core.masterreplica;

import io.lettuce.core.protocol.AsyncCommand;
import io.lettuce.core.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;
    }

}