Mercurial > hg > monetdb-java

annotate src/main/java/org/monetdb/mcl/net/ClientInfo.java @ 904:2d880f90be2a

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Try to use reasonable defaults for ClientInfo
author Joeri van Ruth <joeri.van.ruth@monetdbsolutions.com>
date Fri, 14 Jun 2024 16:50:27 +0200 (10 months ago)
parents 778959b2e0a4
children a52bc2dcdb8c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 package org.monetdb.mcl.net;
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2
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3 import org.monetdb.jdbc.MonetDriver;
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4
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5 import java.io.File;
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6 import java.lang.management.ManagementFactory;
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7 import java.lang.management.RuntimeMXBean;
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8 import java.net.InetAddress;
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9 import java.net.UnknownHostException;
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10 import java.sql.ClientInfoStatus;
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11 import java.sql.SQLClientInfoException;
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12 import java.util.Collections;
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13 import java.util.Map;
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14 import java.util.Properties;
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15
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16 public class ClientInfo {
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17 private static final String defaultHostname = findHostname();
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18
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19 private static final String defaultClientLibrary = findClientLibrary();
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20
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21 private static final String defaultApplicationName = findApplicationName();
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22
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23 private static final String defaultPid = findPid();
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24
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25 private final Properties props;
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26
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27 public ClientInfo() {
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28 props = new Properties();
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29 props.setProperty("ClientHostname", defaultHostname);
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30 props.setProperty("ClientLibrary", defaultClientLibrary);
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31 props.setProperty("ClientPid", defaultPid);
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32 props.setProperty("ApplicationName", defaultApplicationName);
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33 props.setProperty("ClientRemark", "");
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34 }
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35
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36 private static String findHostname() {
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37 try {
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38 return InetAddress.getLocalHost().getHostName();
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39 } catch (UnknownHostException e) {
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40 return "";
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41 }
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42 }
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43
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44 private static String findApplicationName() {
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45 String appName = "";
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46 try {
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47 String prop = System.getProperty("sun.java.command");
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48 if (prop != null) {
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49 // we want only the command, and not the arguments
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50 prop = prop.split("\\s", 2)[0];
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51 // keep only the basename5
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52 int idx = prop.lastIndexOf(File.separatorChar);
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53 if (idx >= 0)
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54 prop = prop.substring(idx + 1);
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55 appName = prop;
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56 }
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57 } catch (SecurityException e) {
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58 // ignore
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59 }
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60
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61 return appName;
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62 }
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63
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64 private static String findPid() {
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65 try {
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66 RuntimeMXBean mxbean = ManagementFactory.getRuntimeMXBean();
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67 String pidAtHostname = mxbean.getName();
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68 return pidAtHostname.split("@", 2)[0];
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69 } catch (RuntimeException e) {
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70 return "";
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71 }
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72 }
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73
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74 private static String findClientLibrary() {
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75 return "monetdb-java " + MonetDriver.getDriverVersion();
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76 }
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77
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78 public String format() {
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79 StringBuilder builder = new StringBuilder(200);
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80 for (String name : props.stringPropertyNames()) {
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81 String value = props.getProperty(name);
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82 builder.append(name);
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83 builder.append('=');
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84 builder.append(value);
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85 builder.append('\n');
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86 }
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87 return builder.toString();
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88 }
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89
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90 public Properties get() {
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91 Properties ret = new Properties();
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92 ret.putAll(props);
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93 return ret;
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94 }
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95
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96 public boolean set(String name, String value) throws SQLClientInfoException {
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97 if (value == null)
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98 value = "";
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99 if (value.contains("\n")) {
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100 Map<String, ClientInfoStatus> map = Collections.singletonMap(name, ClientInfoStatus.REASON_VALUE_INVALID);
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101 throw new SQLClientInfoException(map);
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102 }
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103 if (props.containsKey(name)) {
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104 props.setProperty(name, value);
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105 return true;
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106 } else {
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107 return false;
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108 }
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109 }
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110
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111 }