1 | /*
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2 | * MessageRouter.java
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3 | * Copyright (C) 2002 New Zealand Digital Library, http://www.nzdl.org
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4 | *
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5 | * This program is free software; you can redistribute it and/or modify
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6 | * it under the terms of the GNU General Public License as published by
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7 | * the Free Software Foundation; either version 2 of the License, or
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8 | * (at your option) any later version.
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9 | *
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10 | * This program is distributed in the hope that it will be useful,
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11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 | * GNU General Public License for more details.
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14 | *
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15 | * You should have received a copy of the GNU General Public License
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16 | * along with this program; if not, write to the Free Software
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17 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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18 | */
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19 | package org.greenstone.gsdl3.core;
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20 |
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21 | import org.greenstone.gsdl3.util.*;
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22 | import org.greenstone.gsdl3.service.*;
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23 | import org.greenstone.gsdl3.comms.*;
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24 | import org.greenstone.gsdl3.collection.*;
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25 |
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26 | // XML classes
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27 | import org.w3c.dom.Node;
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28 | import org.w3c.dom.NodeList;
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29 | import org.w3c.dom.Document;
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30 | import org.w3c.dom.Element;
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31 | import org.xml.sax.InputSource;
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32 | import javax.xml.parsers.*;
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33 |
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34 | // other java classes
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35 | import java.io.File;
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36 | import java.util.HashMap;
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37 | import java.util.Iterator;
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38 | import java.io.Reader;
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39 | import java.io.StringReader;
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40 | import java.net.Authenticator;
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41 | import java.net.PasswordAuthentication;
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42 |
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43 | /**
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44 | * The hub of a Greenstone system.
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45 | *
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46 | * Accepts XML requests (via process method of ModuleInterface) and routes them to the appropriate collection or
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47 | * service or external entity.
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48 | *
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49 | * contains a map of module objects - may be services, collections, comms
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50 | * objects talking to other MessageRouters etc.
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51 | *
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52 | *
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53 | * @author <a href="mailto:[email protected]">Katherine Don</a>
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54 | * @version $Revision: 9824 $
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55 | * @see ModuleInterface
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56 | * @see Collection
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57 | * @see ServiceRack
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58 | * @see Communicator
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59 | *
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60 | */
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61 | public class MessageRouter implements ModuleInterface {
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62 |
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63 | /** site home - the home directory for the site */
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64 | protected String site_home=null;
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65 | /** the http address for this site */
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66 | protected String site_http_address=null;
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67 |
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68 | /** the global name for this site */
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69 | protected String global_site_name=null;
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70 |
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71 | /** map of names to Module objects */
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72 | protected HashMap module_map=null;
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73 |
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74 | /** container Document to create XML Nodes */
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75 | protected Document doc=null;
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76 | /** the full description of this site */
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77 |
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78 | // should these things be separated into local and remote??
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79 |
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80 | /** list of collections that can be reached */
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81 | protected Element collection_list = null;
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82 | /** list of service clusters that can be reached */
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83 | protected Element cluster_list = null;
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84 | /** list of single services that can be reached */
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85 | protected Element service_list = null;
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86 | /** list of sites that can be reached */
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87 | protected Element site_list = null;
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88 |
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89 | /** a converter class to parse XML and create Docs */
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90 | protected XMLConverter converter=null;
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91 |
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92 | //***************************************************************
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93 | // public methods
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94 | //***************************************************************
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95 |
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96 | /** constructor */
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97 | public MessageRouter() {
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98 | this.converter = new XMLConverter();
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99 | this.doc = this.converter.newDOM();
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100 | }
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101 |
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102 | public void cleanUp() {
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103 | if (this.module_map != null) {
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104 | Iterator i = this.module_map.values().iterator();
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105 | while (i.hasNext()) {
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106 | ((ModuleInterface)i.next()).cleanUp();
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107 | }
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108 | }
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109 | }
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110 | /** site_home must be set before configure called */
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111 | public void setSiteHome(String home) {
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112 | this.site_home = home;
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113 | }
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114 |
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115 | /**
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116 | * configures the system
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117 | *
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118 | * looks in site_home/collect for collections, reads config file
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119 | * site_home/sitecfg.xml
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120 | *
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121 | */
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122 | public boolean configure() {
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123 |
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124 | System.out.println("MessageRouter:configuring site");
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125 |
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126 | if (this.site_home==null) {
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127 | System.err.println("MessageRouter: You must set site_home before calling configure");
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128 | return false;
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129 | }
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130 |
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131 | // read thru own config file - create services and connect to sites
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132 | File configFile = new File(GSFile.siteConfigFile(this.site_home));
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133 |
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134 | if (!configFile.exists() ) {
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135 | System.err.println("MessageRouter: site config file: "+configFile.getPath()+" not found!");
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136 | return false;
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137 | }
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138 |
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139 | this.module_map = new HashMap();
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140 |
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141 | Document config_doc = this.converter.getDOM(configFile);
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142 | if (config_doc == null) {
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143 | System.err.println("MessageRouter: couldn't parse site config file: "+configFile.getPath());
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144 | return false;
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145 | }
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146 | Element config_elem = config_doc.getDocumentElement();
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147 |
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148 | Element local_site_name = (Element)GSXML.getChildByTagName(config_elem, GSXML.SITE_NAME_ELEM);
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149 | if (local_site_name == null) {
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150 | System.err.println("MessageRouter configure error:no site name in config file");
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151 | return false;
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152 | } else {
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153 | this.global_site_name = local_site_name.getAttribute(GSXML.VALUE_ATT);
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154 | }
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155 |
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156 | Element http_address = (Element)GSXML.getChildByTagName(config_elem, GSXML.SITE_HTTP_ADDRESS_ELEM);
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157 | if (http_address == null) {
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158 | System.err.println("MessageRouter configure error: no http address in config file");
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159 | return false;
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160 | } else {
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161 | this.site_http_address = http_address.getAttribute(GSXML.VALUE_ATT);
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162 | }
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163 |
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164 | Element proxy = (Element)GSXML.getChildByTagName(config_elem, "proxy");
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165 | if (proxy != null) {
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166 | String host = proxy.getAttribute("host");
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167 | String port = proxy.getAttribute("port");
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168 | final String user = proxy.getAttribute("user");
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169 | final String passwd = proxy.getAttribute("password");
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170 | if (host.equals("") || port.equals("") || user.equals("")||passwd.equals("")) {
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171 | System.err.println("MessageRouter.configure Error: A proxy was specified in the config file, but attributes host, port, user, password were not all present");
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172 | } else {
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173 | try {
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174 | // set up the proxy
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175 | System.setProperty("http.proxyType", "4");
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176 | System.setProperty("http.proxyHost", host);
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177 | System.setProperty("http.proxyPort", port);
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178 | System.setProperty("http.proxySet", "true");
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179 | Authenticator.setDefault(new Authenticator(){
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180 | protected PasswordAuthentication getPasswordAuthentication(){
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181 | return new PasswordAuthentication(user, new
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182 | String(passwd).toCharArray());
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183 | }
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184 | });
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185 |
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186 | } catch (Exception e) {
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187 | System.err.println("MessageRouter Error: couldn't set up the proxy");
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188 | }
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189 | }
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190 | }
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191 |
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192 | // load up the services
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193 | Element service_rack_list = (Element)GSXML.getChildByTagName(config_elem, GSXML.SERVICE_CLASS_ELEM+GSXML.LIST_MODIFIER);
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194 | configureServices(service_rack_list);
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195 |
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196 | // load up the service clusters
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197 | Element cluster_list = (Element)GSXML.getChildByTagName(config_elem, GSXML.CLUSTER_ELEM+GSXML.LIST_MODIFIER);
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198 | configureClusters(cluster_list);
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199 |
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200 | // load up the collections
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201 | configureCollections();
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202 |
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203 | // load up the external sites - this also adds their services/clusters/collections to the other lists - so must be done last
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204 | Element site_list = (Element)GSXML.getChildByTagName(config_elem, GSXML.SITE_ELEM+GSXML.LIST_MODIFIER);
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205 | configureSites(site_list);
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206 |
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207 |
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208 | return true;
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209 |
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210 | }
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211 |
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212 |
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213 | /**
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214 | * Process an XML request - as a String
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215 | *
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216 | * @param xml_in the request to process
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217 | * @return the response - contains any error messages
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218 | * @see String
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219 | */
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220 | public String process(String xml_in) {
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221 |
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222 | Document doc = this.converter.getDOM(xml_in);
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223 |
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224 | Element result = process(doc.getDocumentElement());
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225 | return this.converter.getString(result);
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226 | }
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227 |
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228 | /**
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229 | * Process an XML request - as a DOM Element
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230 | *
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231 | * @param xml_in the message to process - should be <message>
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232 | * @return the response - contains any error messages
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233 | * @see Element
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234 | */
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235 | public Element process(Element message) {
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236 |
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237 | ///ystem.out.println("MR received request");
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238 | ///ystem.out.println(this.converter.getString(message));
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239 |
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240 | // check that its a correct message tag
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241 | if (!message.getTagName().equals(GSXML.MESSAGE_ELEM)) {
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242 | System.err.println("MessageRouter: Invalid message. GSDL message should start with <"+GSXML.MESSAGE_ELEM+">, instead it starts with:"+message.getTagName()+".");
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243 | return null;
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244 | }
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245 |
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246 | NodeList requests = message.getElementsByTagName(GSXML.REQUEST_ELEM);
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247 |
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248 | Element mainResult = this.doc.createElement(GSXML.MESSAGE_ELEM);
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249 |
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250 | // empty request
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251 | if (requests.getLength()==0) {
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252 | return mainResult;
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253 | }
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254 |
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255 | Document message_doc = message.getOwnerDocument();
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256 |
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257 | // for now, just process each request one by one, and append the results to mainResult
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258 | // Note: if you add an element to another node in the same document, it
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259 | // gets removed from where it was. This changes the node list - you cant iterate over the node list in a normal manner if you are moving elements out of it
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260 | int num_requests = requests.getLength();
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261 | for (int i=0; i< num_requests; i++) {
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262 | Node result=null;
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263 | Element req = (Element)requests.item(0);
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264 | String path = req.getAttribute(GSXML.TO_ATT); // returns "" if no att of this name
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265 | if (path.equals("")) {
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266 | // its a message for the message router
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267 | result = processMessage(req);
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268 | mainResult.appendChild(this.doc.importNode(result, true));
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269 | } else {
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270 | String [] modules = path.split(",");
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271 | for (int j=0; j<modules.length; j++) {
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272 | String this_mod = modules[j];
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273 | // find the module to pass it on to
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274 | // need to put the request into a message element
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275 | Element mess = message_doc.createElement(GSXML.MESSAGE_ELEM);
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276 | req.setAttribute(GSXML.TO_ATT, this_mod);
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277 | mess.appendChild(req);
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278 | String obj = GSPath.getFirstLink(this_mod);
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279 | if (this.module_map.containsKey(obj)) {
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280 | result = ((ModuleInterface)this.module_map.get(obj)).process(mess);
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281 | if (result !=null ) {
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282 | // append the contents of the message to the mainResult - there will only be one response at this stage
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283 | mainResult.appendChild(this.doc.importNode(GSXML.getChildByTagName(result, GSXML.RESPONSE_ELEM), true));
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284 | } else {
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285 | // add in a place holder response
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286 | Element response = this.doc.createElement(GSXML.RESPONSE_ELEM);
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287 | response.setAttribute(GSXML.FROM_ATT, this_mod);
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288 | mainResult.appendChild(response);
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289 | System.err.println("MessageRouter Error: request had null result!");
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290 | }
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291 |
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292 | } else {
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293 | System.err.println("MessageRouter Error: request has illegal module name in:\n"+this.converter.getString(req));
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294 | }
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295 | }
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296 | }
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297 |
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298 | } // for each request
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299 |
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300 | ///ystem.out.println("MR returned response");
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301 | ///ystem.out.println(this.converter.getString(mainResult));
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302 |
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303 | return mainResult;
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304 |
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305 | }
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306 |
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307 | // ********************************************************************
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308 | // auxiliary configure methods
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309 | // *******************************************************************
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310 |
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311 |
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312 | protected boolean configureServices(Element service_rack_list) {
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313 |
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314 | this.service_list = this.doc.createElement(GSXML.SERVICE_ELEM+GSXML.LIST_MODIFIER);
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315 |
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316 | // load up the individual services
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317 | System.out.println("loading service modules...");
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318 |
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319 | if (service_rack_list == null) {
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320 | System.out.println("... none to be loaded");
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321 | return true;
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322 | }
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323 |
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324 | NodeList service_racks = service_rack_list.getElementsByTagName(GSXML.SERVICE_CLASS_ELEM);
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325 | if (service_racks.getLength()==0) {
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326 | System.out.println("... none to be loaded");
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327 | return true;
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328 | }
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329 |
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330 | Element service_message = this.doc.createElement(GSXML.MESSAGE_ELEM);
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331 | Element service_request = GSXML.createBasicRequest(this.doc, GSXML.REQUEST_TYPE_DESCRIBE, "", "", "");
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332 | service_message.appendChild(service_request);
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333 |
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334 | for(int i=0; i<service_racks.getLength(); i++) {
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335 | Element n = (Element)service_racks.item(i);
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336 | String service_name = n.getAttribute(GSXML.NAME_ATT);
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337 | System.out.println("..."+service_name);
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338 | try {
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339 | ServiceRack s = (ServiceRack)Class.forName("org.greenstone.gsdl3.service."+service_name).newInstance();
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340 | s.setSiteHome(this.site_home);
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341 | s.setSiteAddress(this.site_http_address);
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342 | s.setMessageRouter(this);
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343 | // pass the XML node to the service for service configuration
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344 | s.configure(n, null);
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345 |
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346 | // find out the supported services for this service module
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347 | Element service_response = (Element) s.process(service_message);
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348 | NodeList services = service_response.getElementsByTagName(GSXML.SERVICE_ELEM);
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349 | if (services.getLength()==0) {
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350 | System.err.println("MessageRouter configure error: serviceRack "+service_name+" has no services!");
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351 | } else {
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352 | for (int j=0; j<services.getLength();j++) {
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353 | String service = ((Element)services.item(j)).getAttribute(GSXML.NAME_ATT);
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354 | this.module_map.put(service, s);
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355 |
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356 | // add short info to service_list_ XML
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357 | this.service_list.appendChild(this.doc.importNode(services.item(j), true));
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358 | }
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359 | }
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360 | } catch (Exception e ) {
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361 | System.err.println("MessageRouter configure exception: in ServiceRack class specification: "+ e.getMessage());
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362 | e.printStackTrace();
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363 | }
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364 | } // for each service module
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365 | return true;
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366 | }
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367 |
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368 | protected boolean configureClusters(Element cluster_list) {
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369 |
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370 | this.cluster_list = this.doc.createElement(GSXML.CLUSTER_ELEM+GSXML.LIST_MODIFIER);
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371 | // load up the service clusters
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372 | System.out.println("loading service clusters ...");
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373 | if (cluster_list == null) {
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374 | System.out.println("... none to be loaded");
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375 | return true;
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376 | }
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377 | NodeList service_clusters = cluster_list.getElementsByTagName(GSXML.CLUSTER_ELEM);
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378 | if (service_clusters.getLength()==0) {
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379 | System.out.println("... none to be loaded");
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380 | return true;
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381 | }
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382 |
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383 | for (int i=0; i<service_clusters.getLength(); i++) {
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384 | Element cluster = (Element)service_clusters.item(i);
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385 | String name = cluster.getAttribute(GSXML.NAME_ATT);
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386 | System.out.println("..."+name);
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387 | ServiceCluster sc = new ServiceCluster();
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388 | sc.setSiteHome(this.site_home);
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389 | sc.setSiteAddress(this.site_http_address);
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390 | sc.setClusterName(name);
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391 | sc.setMessageRouter(this);
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392 | sc.configure(cluster);
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393 | this.module_map.put(name, sc); // this replaces the old one if there was one already present
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394 | //add short info to cluster list
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395 | Element e = this.doc.createElement(GSXML.CLUSTER_ELEM);
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396 | e.setAttribute(GSXML.NAME_ATT, name);
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397 | this.cluster_list.appendChild(e);
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398 |
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399 | }
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400 | return true;
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401 | }
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402 |
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403 | protected boolean configureCollections() {
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404 |
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405 | this.collection_list = this.doc.createElement(GSXML.COLLECTION_ELEM+GSXML.LIST_MODIFIER);
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406 |
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407 | // read thru the collect directory and activate all the valid collections
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408 | File collectDir = new File(GSFile.collectDir(this.site_home));
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409 | if (collectDir.exists()) {
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410 | System.out.println("Reading thru directory "+collectDir.getPath()+" to find collections.");
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411 | File[] contents = collectDir.listFiles();
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412 | for (int i=0; i<contents.length;i++) {
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413 | if(contents[i].isDirectory()) {
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414 |
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415 | String colName = contents[i].getName();
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416 | if (!colName.startsWith("CVS")) {
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417 | activateCollection(colName);
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418 | }
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419 | }
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420 | }
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421 | } // collectDir
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422 | return true;
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423 | }
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424 |
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425 | protected boolean configureSites(Element site_list) {
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426 |
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427 | this.site_list = this.doc.createElement(GSXML.SITE_ELEM+GSXML.LIST_MODIFIER);
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428 | // load up the sites
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429 | System.out.println("loading external sites...");
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430 | if (site_list ==null ) {
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431 | System.out.println("...none found");
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432 | return true;
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433 | }
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434 | NodeList sites = site_list.getElementsByTagName(GSXML.SITE_ELEM);
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435 | if (sites.getLength()==0) {
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436 | System.out.println("...none found");
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437 | return true;
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438 | }
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439 | for (int i=0; i<sites.getLength(); i++) {
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440 | Element s = (Element)sites.item(i);
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441 | Communicator comm=null;
|
---|
442 | String type = s.getAttribute(GSXML.TYPE_ATT);
|
---|
443 | String name = s.getAttribute(GSXML.NAME_ATT);
|
---|
444 | if (type.equals(GSXML.COMM_TYPE_SOAP_JAVA)) {
|
---|
445 | comm = new SOAPCommunicator();
|
---|
446 | if (comm.configure(s)) {
|
---|
447 | comm.setLocalSiteName(this.global_site_name);
|
---|
448 |
|
---|
449 | // add to map of modules
|
---|
450 | this.module_map.put(name, comm);
|
---|
451 | this.site_list.appendChild(this.doc.importNode(s, true));
|
---|
452 | // need to get collection list and service
|
---|
453 | // list from here- if the site isn't up yet, the site will
|
---|
454 | // have to be added later
|
---|
455 | if (!getRemoteSiteInfo(comm, name)) {
|
---|
456 | System.err.println("MessageRouter: couldn't get info from site "+name);
|
---|
457 | }
|
---|
458 | } else {
|
---|
459 | System.err.println("MessageRouter: couldn't configure soap site:"+name);
|
---|
460 | }
|
---|
461 |
|
---|
462 | } else {
|
---|
463 | System.err.print("MessageRouter: cant talk to server of type:"+type);
|
---|
464 | System.err.println(", so not making a connection to "+name);
|
---|
465 | }
|
---|
466 |
|
---|
467 | }
|
---|
468 | return true;
|
---|
469 | }
|
---|
470 |
|
---|
471 |
|
---|
472 | /** get site info from external site
|
---|
473 | *
|
---|
474 | * @param comm - the communicator object for the external site
|
---|
475 | * @param site_name - the name of the external site
|
---|
476 | * @return true if successful
|
---|
477 | */
|
---|
478 | protected boolean getRemoteSiteInfo(Communicator comm, String site_name) {
|
---|
479 |
|
---|
480 | System.out.println("MessageRouter: getting info from site:"+site_name);
|
---|
481 |
|
---|
482 | Element info_request = this.doc.createElement(GSXML.MESSAGE_ELEM);
|
---|
483 | Element req = GSXML.createBasicRequest(this.doc, GSXML.REQUEST_TYPE_DESCRIBE, "", "", "");
|
---|
484 | info_request.appendChild(req);
|
---|
485 |
|
---|
486 | // process the message
|
---|
487 | Element info_response = comm.process(info_request);
|
---|
488 | if (info_response == null) {
|
---|
489 | return false;
|
---|
490 | }
|
---|
491 | // collection info
|
---|
492 | NodeList colls = info_response.getElementsByTagName(GSXML.COLLECTION_ELEM);
|
---|
493 | if (colls.getLength()>0) {
|
---|
494 | for (int i=0; i<colls.getLength(); i++) {
|
---|
495 | Element e = (Element)colls.item(i);
|
---|
496 | String col_name = e.getAttribute(GSXML.NAME_ATT);
|
---|
497 | // add the info to own coll list - may want to keep
|
---|
498 | // this separate in future - so can distinguish own and
|
---|
499 | // other collections ??
|
---|
500 | e.setAttribute(GSXML.NAME_ATT, GSPath.prependLink(col_name, site_name));
|
---|
501 | this.collection_list.appendChild(this.doc.importNode(e, true));
|
---|
502 | }
|
---|
503 | }
|
---|
504 |
|
---|
505 | // service info
|
---|
506 | NodeList services = info_response.getElementsByTagName(GSXML.SERVICE_ELEM);
|
---|
507 | if (services.getLength()>0) {
|
---|
508 | for (int i=0; i<services.getLength(); i++) {
|
---|
509 | Element e = (Element)services.item(i);
|
---|
510 | String serv_name = e.getAttribute(GSXML.NAME_ATT);
|
---|
511 | e.setAttribute(GSXML.NAME_ATT, GSPath.prependLink(serv_name, site_name));
|
---|
512 | this.service_list.appendChild(this.doc.importNode(e, true));
|
---|
513 | }
|
---|
514 | }
|
---|
515 |
|
---|
516 | // serviceCluster info
|
---|
517 | NodeList clusters = info_response.getElementsByTagName(GSXML.CLUSTER_ELEM);
|
---|
518 | if (clusters.getLength()>0) {
|
---|
519 | for (int i=0; i<clusters.getLength(); i++) {
|
---|
520 | Element e = (Element)clusters.item(i);
|
---|
521 | String clus_name = e.getAttribute(GSXML.NAME_ATT);
|
---|
522 | e.setAttribute(GSXML.NAME_ATT, GSPath.prependLink(clus_name, site_name));
|
---|
523 | this.cluster_list.appendChild(this.doc.importNode(e, true));
|
---|
524 | }
|
---|
525 | }
|
---|
526 | return true;
|
---|
527 | }
|
---|
528 |
|
---|
529 |
|
---|
530 | //*****************************************************************
|
---|
531 | // auxiliary process methods
|
---|
532 | //*****************************************************************
|
---|
533 |
|
---|
534 | /** handles requests made to the MessageRouter itself
|
---|
535 | *
|
---|
536 | * @param req - the request Element- <request>
|
---|
537 | * @return the result Element - should be <response>
|
---|
538 | */
|
---|
539 | protected Element processMessage(Element req) {
|
---|
540 |
|
---|
541 | // message for self, should be type=describe/configure at this stage
|
---|
542 | String type = req.getAttribute(GSXML.TYPE_ATT);
|
---|
543 | Element response = this.doc.createElement(GSXML.RESPONSE_ELEM);
|
---|
544 | response.setAttribute(GSXML.FROM_ATT, "");
|
---|
545 | if (type.equals(GSXML.REQUEST_TYPE_DESCRIBE)) {
|
---|
546 | response.setAttribute(GSXML.TYPE_ATT, GSXML.REQUEST_TYPE_DESCRIBE);
|
---|
547 | // check the param list
|
---|
548 | Element param_list = (Element) GSXML.getChildByTagName(req, GSXML.PARAM_ELEM+GSXML.LIST_MODIFIER);
|
---|
549 | if (param_list == null) {
|
---|
550 | response.appendChild(this.collection_list);
|
---|
551 | response.appendChild(this.cluster_list);
|
---|
552 | response.appendChild(this.site_list);
|
---|
553 | response.appendChild(this.service_list);
|
---|
554 | return response;
|
---|
555 | }
|
---|
556 | NodeList params = param_list.getElementsByTagName(GSXML.PARAM_ELEM);
|
---|
557 |
|
---|
558 | // go through the param list and see what components are wanted
|
---|
559 | for (int i=0; i<params.getLength(); i++) {
|
---|
560 |
|
---|
561 | Element param = (Element)params.item(i);
|
---|
562 | // Identify the structure information desired
|
---|
563 | if (param.getAttribute(GSXML.NAME_ATT).equals(GSXML.SUBSET_PARAM)) {
|
---|
564 | String info = param.getAttribute(GSXML.VALUE_ATT);
|
---|
565 | if (info.equals(GSXML.COLLECTION_ELEM+GSXML.LIST_MODIFIER)) {
|
---|
566 | response.appendChild(this.collection_list);
|
---|
567 |
|
---|
568 | } else if (info.equals(GSXML.CLUSTER_ELEM+GSXML.LIST_MODIFIER)) {
|
---|
569 | response.appendChild(this.cluster_list);
|
---|
570 |
|
---|
571 | } else if (info.equals(GSXML.SERVICE_ELEM+GSXML.LIST_MODIFIER)) {
|
---|
572 | response.appendChild(this.service_list);
|
---|
573 | } else if (info.equals(GSXML.SITE_ELEM+GSXML.LIST_MODIFIER)) {
|
---|
574 | response.appendChild(this.site_list);
|
---|
575 | }
|
---|
576 | }
|
---|
577 | }
|
---|
578 | return response;
|
---|
579 |
|
---|
580 | }
|
---|
581 |
|
---|
582 | if (type.equals(GSXML.REQUEST_TYPE_SYSTEM)) {
|
---|
583 |
|
---|
584 | // a list of system requests - should put any error messages
|
---|
585 | // or success messages into response
|
---|
586 | NodeList commands = req.getElementsByTagName(GSXML.SYSTEM_ELEM);
|
---|
587 | Element site_config_elem = null;
|
---|
588 | boolean success = false;
|
---|
589 |
|
---|
590 | for (int i=0; i<commands.getLength(); i++) {
|
---|
591 | // all the commands should be Elements
|
---|
592 | Element elem = (Element)commands.item(i);
|
---|
593 | String action = elem.getAttribute(GSXML.TYPE_ATT);
|
---|
594 | if (action.equals(GSXML.SYSTEM_TYPE_CONFIGURE)) {
|
---|
595 | String subset = elem.getAttribute(GSXML.SYSTEM_SUBSET_ATT);
|
---|
596 | if (subset.equals("")) {
|
---|
597 | // need to reconfigure the MR
|
---|
598 | this.configure();
|
---|
599 | Element s = GSXML.createTextElement(this.doc, GSXML.STATUS_ELEM, "MessageRouter reconfigured successfully");
|
---|
600 | response.appendChild(s);
|
---|
601 |
|
---|
602 | } else {
|
---|
603 | // else it a specific request
|
---|
604 | if (subset.equals(GSXML.COLLECTION_ELEM+GSXML.LIST_MODIFIER)) {
|
---|
605 | success = configureCollections();
|
---|
606 | } else {
|
---|
607 |
|
---|
608 | // need the site config file
|
---|
609 | if (site_config_elem==null) {
|
---|
610 |
|
---|
611 | File configFile = new File(GSFile.siteConfigFile(this.site_home));
|
---|
612 | if (!configFile.exists() ) {
|
---|
613 | System.err.println("MessageRouter: site config file: "+configFile.getPath()+" not found!");
|
---|
614 | continue;
|
---|
615 | }
|
---|
616 | Document site_config_doc = this.converter.getDOM(configFile);
|
---|
617 | if (site_config_doc == null) {
|
---|
618 | System.err.println("MessageRouter: couldn't parse site config file: "+configFile.getPath());
|
---|
619 | continue;
|
---|
620 | }
|
---|
621 | site_config_elem = site_config_doc.getDocumentElement();
|
---|
622 | }
|
---|
623 | if (subset.equals(GSXML.SERVICE_ELEM+GSXML.LIST_MODIFIER)) {
|
---|
624 | Element service_rack_list = (Element)GSXML.getChildByTagName(site_config_elem, GSXML.SERVICE_CLASS_ELEM+GSXML.LIST_MODIFIER);
|
---|
625 |
|
---|
626 | success = configureServices(service_rack_list);
|
---|
627 | } else if (subset.equals(GSXML.CLUSTER_ELEM+GSXML.LIST_MODIFIER)) {
|
---|
628 | Element cluster_list = (Element)GSXML.getChildByTagName(site_config_elem, GSXML.CLUSTER_ELEM+GSXML.LIST_MODIFIER);
|
---|
629 |
|
---|
630 | success = configureClusters(cluster_list);
|
---|
631 | } else if (subset.equals(GSXML.SITE_ELEM+GSXML.LIST_MODIFIER)) {
|
---|
632 | Element site_list = (Element)GSXML.getChildByTagName(site_config_elem, GSXML.SITE_ELEM+GSXML.LIST_MODIFIER);
|
---|
633 | success = configureSites(site_list);
|
---|
634 | }
|
---|
635 | }
|
---|
636 | String message=null;
|
---|
637 | if (success) {
|
---|
638 | message = subset + "reconfigured successfully";
|
---|
639 | } else {
|
---|
640 | message = "Error in reconfiguring "+subset;
|
---|
641 | }
|
---|
642 | Element s = GSXML.createTextElement(this.doc, GSXML.STATUS_ELEM, message);
|
---|
643 | response.appendChild(s);
|
---|
644 | }
|
---|
645 |
|
---|
646 |
|
---|
647 | } else {
|
---|
648 | String module_name = elem.getAttribute(GSXML.SYSTEM_MODULE_NAME_ATT);
|
---|
649 | String module_type = elem.getAttribute(GSXML.SYSTEM_MODULE_TYPE_ATT);
|
---|
650 |
|
---|
651 | if (action.equals(GSXML.SYSTEM_TYPE_DEACTIVATE)) {
|
---|
652 | deactivateModule(module_type, module_name);
|
---|
653 | Element s = GSXML.createTextElement(this.doc, GSXML.STATUS_ELEM, module_type+": "+module_name+" deactivated");
|
---|
654 | response.appendChild(s);
|
---|
655 | } else if (action.equals(GSXML.SYSTEM_TYPE_ACTIVATE)) {
|
---|
656 | if (module_type.equals(GSXML.COLLECTION_ELEM)) {
|
---|
657 | success = activateCollection(module_name);
|
---|
658 | } else if (module_type.equals(GSXML.SITE_ELEM)) {
|
---|
659 | success = activateSite(module_name);
|
---|
660 | } else if (module_type.equals(GSXML.CLUSTER_ELEM)) {
|
---|
661 | success = activateServiceCluster(module_name);
|
---|
662 | }
|
---|
663 | if (success) {
|
---|
664 | Element s = GSXML.createTextElement(this.doc, GSXML.STATUS_ELEM, module_type+": "+module_name+" activated");
|
---|
665 | response.appendChild(s);
|
---|
666 | } else {
|
---|
667 | Element s = GSXML.createTextElement(this.doc, GSXML.STATUS_ELEM, module_type+": "+module_name+" could not be activated");
|
---|
668 | response.appendChild(s);
|
---|
669 | }
|
---|
670 | }
|
---|
671 | } // else not a configure action
|
---|
672 | } // for all commands
|
---|
673 | return response;
|
---|
674 |
|
---|
675 |
|
---|
676 | } // system type request
|
---|
677 |
|
---|
678 | // if get here something has gone wrong
|
---|
679 | System.err.println("MessageRouter: cant process request:");
|
---|
680 | System.err.println(this.converter.getString(req));
|
---|
681 | return null;
|
---|
682 |
|
---|
683 | }
|
---|
684 |
|
---|
685 | // ****************************************************
|
---|
686 | // other methods
|
---|
687 | // ****************************************************
|
---|
688 |
|
---|
689 | /** creates and configures a new collection
|
---|
690 | *
|
---|
691 | *@param col_name the name of the collection
|
---|
692 | *@return true if collection created ok
|
---|
693 | */
|
---|
694 | protected boolean activateCollection(String col_name) {
|
---|
695 |
|
---|
696 | System.out.println("MessageRouter:Activating collection: "+col_name+".");
|
---|
697 |
|
---|
698 | // now we need to look for the etc/collectionInit.xml file, and see what sort of Collection to load
|
---|
699 | Collection c = null;
|
---|
700 | File init_file = new File(GSFile.collectionInitFile(this.site_home, col_name));
|
---|
701 | if (init_file.exists()) {
|
---|
702 | Document init_doc = this.converter.getDOM(init_file);
|
---|
703 | if (init_doc != null) {
|
---|
704 | Element init_elem = init_doc.getDocumentElement();
|
---|
705 | if (init_elem != null) {
|
---|
706 | String coll_class_name = init_elem.getAttribute("class");
|
---|
707 | if (!coll_class_name.equals("")) {
|
---|
708 | try {
|
---|
709 | c = (Collection)Class.forName("org.greenstone.gsdl3.collection."+coll_class_name).newInstance();
|
---|
710 | } catch (Exception e) {
|
---|
711 | System.out.println("MessageRouter: couldn't create a new collection, type "+coll_class_name+", defaulting to class Collection");
|
---|
712 | }
|
---|
713 | }
|
---|
714 | }
|
---|
715 | }
|
---|
716 | }
|
---|
717 | if (c==null) { // we haven't found anpther classname to use
|
---|
718 | c = new Collection();
|
---|
719 | }
|
---|
720 |
|
---|
721 | c.setCollectionName(col_name);
|
---|
722 | c.setSiteHome(this.site_home);
|
---|
723 | c.setSiteAddress(this.site_http_address);
|
---|
724 | if (c.configure()) {
|
---|
725 | // this could be a reactivation, so delete the old version
|
---|
726 | deactivateModule(GSXML.COLLECTION_ELEM, col_name);
|
---|
727 | // add to list of collections
|
---|
728 | this.module_map.put(col_name, c);
|
---|
729 | //add short description_ to collection_list_
|
---|
730 | Element e = this.doc.createElement(GSXML.COLLECTION_ELEM);
|
---|
731 | e.setAttribute(GSXML.NAME_ATT, col_name);
|
---|
732 | this.collection_list.appendChild(e);
|
---|
733 | return true;
|
---|
734 | } else {
|
---|
735 | System.err.println("MessageRouter:Couldn't configure collection: "+
|
---|
736 | col_name+".");
|
---|
737 | return false;
|
---|
738 | }
|
---|
739 |
|
---|
740 | }
|
---|
741 |
|
---|
742 | protected boolean activateSite(String site_name) {
|
---|
743 | System.out.println("MessageRouter:Activating site: "+site_name+".");
|
---|
744 |
|
---|
745 | // just in case this is a reactivation, deactivate this site first
|
---|
746 | deactivateModule(GSXML.SITE_ELEM, site_name);
|
---|
747 | File configFile = new File(GSFile.siteConfigFile(this.site_home));
|
---|
748 |
|
---|
749 | if (!configFile.exists() ) {
|
---|
750 | System.err.println("MessageRouter: site config file: "+configFile.getPath()+" not found!");
|
---|
751 | return false;
|
---|
752 | }
|
---|
753 | Document config_doc = this.converter.getDOM(configFile);
|
---|
754 | if (config_doc == null) {
|
---|
755 | System.err.println("MessageRouter: couldn't parse site config file: "+configFile.getPath());
|
---|
756 | return false;
|
---|
757 | }
|
---|
758 | Element config_elem = config_doc.getDocumentElement();
|
---|
759 |
|
---|
760 | Element site_list = (Element)GSXML.getChildByTagName(config_elem, GSXML.SITE_ELEM+GSXML.LIST_MODIFIER);
|
---|
761 | if (site_list ==null ) {
|
---|
762 | System.err.println("MessageRouter:activateSite, no sites found");
|
---|
763 | return false;
|
---|
764 | }
|
---|
765 | Element this_site_elem = GSXML.getNamedElement(site_list, GSXML.SITE_ELEM, GSXML.NAME_ATT, site_name);
|
---|
766 | if (this_site_elem == null) {
|
---|
767 | System.err.println("MessageRouter:activateSite, site "+site_name+" not found");
|
---|
768 | return false;
|
---|
769 | }
|
---|
770 |
|
---|
771 | Communicator comm=null;
|
---|
772 | String type = this_site_elem.getAttribute(GSXML.TYPE_ATT);
|
---|
773 | if (type.equals(GSXML.COMM_TYPE_SOAP_JAVA)) {
|
---|
774 | comm = new SOAPCommunicator();
|
---|
775 | if (comm.configure(this_site_elem)) {
|
---|
776 | comm.setLocalSiteName(this.global_site_name);
|
---|
777 |
|
---|
778 | // add to map of modules
|
---|
779 | this.module_map.put(site_name, comm);
|
---|
780 | this.site_list.appendChild(this.doc.importNode(this_site_elem, true));
|
---|
781 | // need to get collection list and service
|
---|
782 | // list from here- if the site isn't up yet, the site will
|
---|
783 | // have to be added later
|
---|
784 | if (!getRemoteSiteInfo(comm, site_name)) {
|
---|
785 | System.err.println("MessageRouter: couldn't get info from site "+site_name);
|
---|
786 | }
|
---|
787 | } else {
|
---|
788 | System.err.println("MessageRouter: couldn't configure soap site:"+site_name);
|
---|
789 | return false;
|
---|
790 | }
|
---|
791 |
|
---|
792 | } else {
|
---|
793 | System.err.print("MessageRouter: cant talk to server of type:"+type);
|
---|
794 | System.err.println(", so not making a connection to "+site_name);
|
---|
795 | return false;
|
---|
796 | }
|
---|
797 | return true;
|
---|
798 |
|
---|
799 | }
|
---|
800 |
|
---|
801 | protected boolean activateServiceCluster(String cluster_name) {
|
---|
802 | return false;
|
---|
803 |
|
---|
804 | }
|
---|
805 |
|
---|
806 | protected boolean activateServiceRack(String module_name) {
|
---|
807 | return false;
|
---|
808 | }
|
---|
809 |
|
---|
810 | protected boolean deactivateModule(String type, String name) {
|
---|
811 |
|
---|
812 | if (this.module_map.containsKey(name)) {
|
---|
813 |
|
---|
814 | System.out.println("MessageRouter: deactivating "+name);
|
---|
815 | ModuleInterface m = (ModuleInterface)this.module_map.remove(name);
|
---|
816 | m.cleanUp(); // clean up any open files/connections etc - can cause trouble on windows
|
---|
817 | // also remove the xml bit from description list
|
---|
818 | if (type.equals(GSXML.COLLECTION_ELEM)) {
|
---|
819 | Element this_col = GSXML.getNamedElement(this.collection_list, GSXML.COLLECTION_ELEM, GSXML.NAME_ATT, name);
|
---|
820 | if (this_col != null) {
|
---|
821 | this.collection_list.removeChild(this_col);
|
---|
822 | }
|
---|
823 | return true;
|
---|
824 | } else if (type.equals(GSXML.SERVICE_ELEM)) {
|
---|
825 | Element this_service = GSXML.getNamedElement(this.service_list, GSXML.SERVICE_ELEM, GSXML.NAME_ATT, name);
|
---|
826 | if (this_service != null) {
|
---|
827 | this.service_list.removeChild(this_service);
|
---|
828 | }
|
---|
829 | return true;
|
---|
830 | } else if (type.equals(GSXML.CLUSTER_ELEM)) {
|
---|
831 | Element this_cluster = GSXML.getNamedElement(this.cluster_list, GSXML.CLUSTER_ELEM, GSXML.NAME_ATT, name);
|
---|
832 | if (this_cluster != null) {
|
---|
833 | this.cluster_list.removeChild(this_cluster);
|
---|
834 | }
|
---|
835 | return true;
|
---|
836 | } else if (type.equals(GSXML.SITE_ELEM)) {
|
---|
837 | Element this_site = GSXML.getNamedElement(this.site_list, GSXML.SITE_ELEM, GSXML.NAME_ATT, name);
|
---|
838 | if (this_site != null) {
|
---|
839 | this.site_list.removeChild(this_site);
|
---|
840 |
|
---|
841 | // also remove this sites colls, services, clusters etc
|
---|
842 | removeRemoteSiteInfo(this.collection_list, GSXML.COLLECTION_ELEM, name);
|
---|
843 | removeRemoteSiteInfo(this.cluster_list, GSXML.CLUSTER_ELEM, name);
|
---|
844 | removeRemoteSiteInfo(this.service_list, GSXML.SERVICE_ELEM, name);
|
---|
845 | }
|
---|
846 | } else {
|
---|
847 | System.err.println("MessageRouter: couldn't deactivate coll");
|
---|
848 | // couldn't do it
|
---|
849 | return false;
|
---|
850 | }
|
---|
851 | }
|
---|
852 | // else not deactivated
|
---|
853 | return false;
|
---|
854 |
|
---|
855 | }
|
---|
856 |
|
---|
857 | /**
|
---|
858 | * this looks through a list (module_list) of elements named module_name,
|
---|
859 | * and removes any whose names start with site_name
|
---|
860 | */
|
---|
861 | protected void removeRemoteSiteInfo(Element module_list,
|
---|
862 | String module_name,
|
---|
863 | String site_name) {
|
---|
864 |
|
---|
865 | NodeList modules = module_list.getElementsByTagName(module_name);
|
---|
866 | // will this work??
|
---|
867 | for (int i=0; i<modules.getLength(); i++) {
|
---|
868 |
|
---|
869 | String name = ((Element)modules.item(i)).getAttribute(GSXML.NAME_ATT);
|
---|
870 | if (GSPath.getFirstLink(name).equals(site_name)) {
|
---|
871 | module_list.removeChild(modules.item(i));
|
---|
872 | i--; // move the pointer back
|
---|
873 | }
|
---|
874 | }
|
---|
875 | }
|
---|
876 |
|
---|
877 | }
|
---|
878 |
|
---|
879 |
|
---|