2 * Copyright (c) 2010-2024 Contributors to the openHAB project
4 * See the NOTICE file(s) distributed with this work for additional
7 * This program and the accompanying materials are made available under the
8 * terms of the Eclipse Public License 2.0 which is available at
9 * http://www.eclipse.org/legal/epl-2.0
11 * SPDX-License-Identifier: EPL-2.0
13 package org.openhab.binding.network.internal.utils;
15 import java.util.Optional;
16 import java.util.regex.Matcher;
17 import java.util.regex.Pattern;
19 import org.eclipse.jdt.annotation.NonNullByDefault;
20 import org.slf4j.Logger;
21 import org.slf4j.LoggerFactory;
24 * Examines output lines of the ping command and tries to extract the contained latency value.
26 * @author Andreas Hirsch - Initial contribution
29 public class LatencyParser {
31 private static final Pattern LATENCY_PATTERN = Pattern.compile(".*time=(.*) ?ms");
32 private final Logger logger = LoggerFactory.getLogger(LatencyParser.class);
34 // This is how the input looks like on Mac and Linux:
35 // ping -c 1 192.168.1.1
36 // PING 192.168.1.1 (192.168.1.1): 56 data bytes
37 // 64 bytes from 192.168.1.1: icmp_seq=0 ttl=64 time=1.225 ms
39 // --- 192.168.1.1 ping statistics ---
40 // 1 packets transmitted, 1 packets received, 0.0% packet loss
41 // round-trip min/avg/max/stddev = 1.225/1.225/1.225/0.000 ms
44 * Examine a single ping command output line and try to extract the latency value if it is contained.
46 * @param inputLine Single output line of the ping command.
47 * @return Latency value provided by the ping command. Optional is empty if the provided line did not contain a
48 * latency value which matches the known patterns.
50 public Optional<Double> parseLatency(String inputLine) {
51 logger.debug("Parsing latency from input {}", inputLine);
53 Matcher m = LATENCY_PATTERN.matcher(inputLine);
54 if (m.find() && m.groupCount() == 1) {
55 return Optional.of(Double.parseDouble(m.group(1)));
58 logger.debug("Did not find a latency value");
59 return Optional.empty();