[3468] | 1 | /*
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[24975] | 2 | * ServiceCluster.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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[3468] | 19 | // leave the package name as is for now - should be changed to something better
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| 20 | // cluster? groups?
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| 21 | package org.greenstone.gsdl3.collection;
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| 22 |
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[25750] | 23 | import java.io.File;
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| 24 | import java.util.HashMap;
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| 25 | import java.util.Iterator;
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[3468] | 26 |
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[25750] | 27 | import org.apache.log4j.Logger;
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| 28 | import org.greenstone.gsdl3.core.MessageRouter;
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| 29 | import org.greenstone.gsdl3.core.ModuleInterface;
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| 30 | import org.greenstone.gsdl3.service.ServiceRack;
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| 31 | import org.greenstone.gsdl3.util.GSFile;
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| 32 | import org.greenstone.gsdl3.util.GSPath;
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| 33 | import org.greenstone.gsdl3.util.GSXML;
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| 34 | import org.greenstone.gsdl3.util.UserContext;
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| 35 | import org.greenstone.gsdl3.util.XMLConverter;
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[24975] | 36 | import org.w3c.dom.Document;
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[25750] | 37 | import org.w3c.dom.Element;
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[24975] | 38 | import org.w3c.dom.Node;
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| 39 | import org.w3c.dom.NodeList;
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[3468] | 40 |
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| 41 | /* ServiceCluster - a groups of services that are related in some way
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[24975] | 42 | * Implements ModuleInterface. Contains a list of services provided by the cluster, along with metadata about the cluster itself.
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| 43 | * a collection is a special type of cluster
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[25750] | 44 | * @author <a href="mailto:[email protected]">Katherine Don</a>
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[24975] | 45 | * @version $Revision: 25973 $
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| 46 | * @see ModuleInterface
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| 47 | */
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| 48 | public class ServiceCluster implements ModuleInterface
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| 49 | {
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[3468] | 50 |
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[24975] | 51 | static Logger logger = Logger.getLogger(org.greenstone.gsdl3.collection.ServiceCluster.class.getName());
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[13123] | 52 |
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[24221] | 53 | protected static final String CONFIG_ENCODING = "utf-8";
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[3468] | 54 |
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[24221] | 55 | protected static final String DEFAULT_LANG = "en"; // hack for now, should be read from the coll cfg file? or site cfg file for cluster
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[24975] | 56 |
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| 57 | /** base directory for the site that this cluster belongs to */
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[24221] | 58 | protected String site_home = null;
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| 59 | /** http address of the site that this cluster belongs to */
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| 60 | protected String site_http_address = null;
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[24975] | 61 | /** The name of the cluster - for a collection, this is the collection name */
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[24221] | 62 | protected String cluster_name = null;
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| 63 | /** collection type : mg, mgpp or lucene */
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| 64 | protected String col_type = "";
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[24975] | 65 | /** database type : gdbm, jdbm or sqlite */
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[24221] | 66 | protected String db_type = "";
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[24975] | 67 |
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[24221] | 68 | /** a reference to the message router */
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| 69 | protected MessageRouter router = null;
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[24975] | 70 | /**
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| 71 | * The map of services.
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| 72 | *
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| 73 | * Maps Services to ServiceRack objects
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| 74 | *
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| 75 | * @see ServiceRack
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| 76 | *
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| 77 | */
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[25635] | 78 | protected HashMap<String, ServiceRack> service_map = null;
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[24975] | 79 | /**
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| 80 | * maps pseudo service names to real service names - needed if we have two
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| 81 | * services with the same name for one collection
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| 82 | */
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[25635] | 83 | protected HashMap<String, String> service_name_map = null;
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[24975] | 84 |
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[24221] | 85 | /** XML converter for String to DOM and vice versa */
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[24975] | 86 | protected XMLConverter converter = null;
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[3468] | 87 |
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[24221] | 88 | /** container doc for description elements */
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| 89 | protected Document doc = null;
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| 90 | /** list of services */
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| 91 | protected Element service_list = null;
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| 92 | /** list of metadata - all metadata, regardless of language goes in here */
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| 93 | protected Element metadata_list = null;
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| 94 | /** language specific stuff */
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| 95 | //protected Element lang_specific_metadata_list = null;
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| 96 | protected Element display_item_list = null;
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| 97 | /** the element that will have any descriptions passed back in */
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| 98 | protected Element description = null;
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[3468] | 99 |
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[24221] | 100 | /** list of plugin */
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| 101 | protected Element plugin_item_list = null;
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[24975] | 102 |
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[25973] | 103 | protected Element _globalFormat = null;
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| 104 |
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[24975] | 105 | public void setSiteHome(String home)
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| 106 | {
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[24221] | 107 | this.site_home = home;
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| 108 | }
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[3468] | 109 |
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[24975] | 110 | public void setSiteAddress(String address)
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| 111 | {
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[24221] | 112 | this.site_http_address = address;
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| 113 | }
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[3468] | 114 |
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[24975] | 115 | public void cleanUp()
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| 116 | {
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[25635] | 117 | Iterator<ServiceRack> i = this.service_map.values().iterator();
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[24975] | 118 | while (i.hasNext())
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| 119 | {
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[25635] | 120 | ServiceRack s = i.next();
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[24221] | 121 | s.cleanUp();
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| 122 | }
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| 123 | }
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[24975] | 124 |
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| 125 | public void setClusterName(String name)
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| 126 | {
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| 127 | this.cluster_name = name;
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[24221] | 128 | this.description.setAttribute(GSXML.NAME_ATT, name);
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| 129 | }
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[3992] | 130 |
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[24975] | 131 | public void setMessageRouter(MessageRouter m)
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| 132 | {
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[24221] | 133 | this.router = m;
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[9874] | 134 | }
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[3468] | 135 |
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[24975] | 136 | public ServiceCluster()
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| 137 | {
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[25635] | 138 | this.service_map = new HashMap<String, ServiceRack>();
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| 139 | this.service_name_map = new HashMap<String, String>();
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[24221] | 140 | this.converter = new XMLConverter();
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| 141 | this.doc = this.converter.newDOM();
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| 142 | this.description = this.doc.createElement(GSXML.CLUSTER_ELEM);
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[24975] | 143 | this.display_item_list = this.doc.createElement(GSXML.DISPLAY_TEXT_ELEM + GSXML.LIST_MODIFIER);
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| 144 | this.metadata_list = this.doc.createElement(GSXML.METADATA_ELEM + GSXML.LIST_MODIFIER);
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| 145 | this.plugin_item_list = this.doc.createElement(GSXML.PLUGIN_ELEM + GSXML.LIST_MODIFIER);
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[24221] | 146 | }
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[3490] | 147 |
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[24221] | 148 | /**
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[24975] | 149 | * Configures the cluster.
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| 150 | *
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| 151 | * gsdlHome and clusterName must be set before configure is called.
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| 152 | *
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| 153 | * reads the site configuration file, and configures itself this calls
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| 154 | * configure(Element) with the XML element node from the config file.
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| 155 | * configure(Element) should be used if the config file has already been
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| 156 | * parsed. This method will work with any subclass.
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| 157 | *
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| 158 | * @return true if configure successful, false otherwise.
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| 159 | */
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| 160 | public boolean configure()
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| 161 | {
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[3468] | 162 |
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[24975] | 163 | if (this.site_home == null || this.cluster_name == null)
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| 164 | {
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[24221] | 165 | logger.error("site_home and cluster_name must be set before configure called!");
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| 166 | return false;
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| 167 | }
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| 168 | logger.info("configuring service cluster");
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| 169 | // read the site configuration file
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| 170 | File config_file = new File(GSFile.siteConfigFile(this.site_home));
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[3468] | 171 |
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[24975] | 172 | if (!config_file.exists())
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| 173 | {
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| 174 | logger.error("couldn't configure cluster: " + this.cluster_name + ", " + config_file + " does not exist");
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[24221] | 175 | return false;
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| 176 | }
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[3468] | 177 |
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[24221] | 178 | Document doc = this.converter.getDOM(config_file, CONFIG_ENCODING);
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[24975] | 179 | if (doc == null)
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| 180 | {
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| 181 | logger.error("couldn't parse config file " + config_file.getPath());
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[24221] | 182 | return false;
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| 183 | }
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[24975] | 184 |
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[24221] | 185 | // get the appropriate service cluster element
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[24975] | 186 | Element cluster_list = (Element) GSXML.getChildByTagName(doc.getDocumentElement(), GSXML.CLUSTER_ELEM + GSXML.LIST_MODIFIER);
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| 187 | Element sc = GSXML.getNamedElement(cluster_list, GSXML.CLUSTER_ELEM, GSXML.NAME_ATT, this.cluster_name);
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| 188 |
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[24221] | 189 | return this.configure(sc);
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[3468] | 190 | }
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[24975] | 191 |
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| 192 | public boolean configure(Element service_cluster_info)
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| 193 | {
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| 194 |
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[24221] | 195 | // get the metadata - for now just add it to the list
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[24975] | 196 | Element meta_list = (Element) GSXML.getChildByTagName(service_cluster_info, GSXML.METADATA_ELEM + GSXML.LIST_MODIFIER);
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| 197 | if (meta_list != null)
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| 198 | {
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| 199 | if (!addMetadata(meta_list))
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| 200 | {
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| 201 |
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[24221] | 202 | logger.error(" couldn't configure the metadata");
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| 203 | }
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| 204 | }
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[24975] | 205 |
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[24221] | 206 | // get the display info
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[24975] | 207 | Element display_list = (Element) GSXML.getChildByTagName(service_cluster_info, GSXML.DISPLAY_TEXT_ELEM + GSXML.LIST_MODIFIER);
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| 208 | if (display_list != null)
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| 209 | {
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| 210 | if (!addDisplayItems(display_list))
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| 211 | {
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| 212 |
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[24221] | 213 | logger.error("couldn't configure the display items");
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| 214 | }
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| 215 | }
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[24975] | 216 |
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[24221] | 217 | //get the plugin info
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| 218 | Element import_list = (Element) GSXML.getChildByTagName(service_cluster_info, GSXML.IMPORT_ELEM);
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| 219 | if (import_list != null)
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| 220 | {
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[24975] | 221 | Element plugin_list = (Element) GSXML.getChildByTagName(service_cluster_info, GSXML.PLUGIN_ELEM + GSXML.LIST_MODIFIER);
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| 222 | if (plugin_list != null)
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| 223 | {
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| 224 | if (!addPlugins(plugin_list))
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| 225 | {
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| 226 |
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[24221] | 227 | logger.error("couldn't configure the plugins");
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| 228 | }
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| 229 | }
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[24975] | 230 | }
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| 231 |
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[24221] | 232 | // do the service racks
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| 233 | // empty the service map in case this is a reconfigure
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| 234 | clearServices();
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[24975] | 235 | Element service_rack_list = (Element) GSXML.getChildByTagName(service_cluster_info, GSXML.SERVICE_CLASS_ELEM + GSXML.LIST_MODIFIER);
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| 236 | if (service_rack_list == null)
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| 237 | {
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[24221] | 238 | // is this an error? could you ever have a service cluster
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| 239 | // without service racks???
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| 240 | logger.error("cluster has no service racks!!");
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[24975] | 241 | }
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| 242 | else
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| 243 | {
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| 244 |
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| 245 | if (!configureServiceRackList(service_rack_list, null))
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| 246 | {
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[24221] | 247 | logger.error("couldn't configure the service racks!!");
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| 248 | return false;
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| 249 | }
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[13994] | 250 | }
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[3847] | 251 |
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[24221] | 252 | return true;
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[4942] | 253 | }
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[24975] | 254 |
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| 255 | /**
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| 256 | * adds metadata from a metadataList into the metadata_list xml
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| 257 | */
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| 258 | protected boolean addMetadata(Element metadata_list)
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| 259 | {
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| 260 | if (metadata_list == null)
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| 261 | return false;
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[24221] | 262 | NodeList metanodes = metadata_list.getElementsByTagName(GSXML.METADATA_ELEM);
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[24975] | 263 | if (metanodes.getLength() > 0)
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| 264 | {
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| 265 | for (int k = 0; k < metanodes.getLength(); k++)
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| 266 | {
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[24221] | 267 | this.metadata_list.appendChild(this.doc.importNode(metanodes.item(k), true));
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| 268 | }
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| 269 | }
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[24975] | 270 |
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[24221] | 271 | return true;
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| 272 | }
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[4942] | 273 |
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[24975] | 274 | protected boolean addDisplayItems(Element display_list)
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| 275 | {
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| 276 |
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| 277 | if (display_list == null)
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| 278 | return false;
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[24221] | 279 | NodeList displaynodes = display_list.getElementsByTagName(GSXML.DISPLAY_TEXT_ELEM);
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[24975] | 280 | if (displaynodes.getLength() > 0)
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| 281 | {
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| 282 | for (int k = 0; k < displaynodes.getLength(); k++)
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| 283 | {
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[24221] | 284 | Element d = (Element) displaynodes.item(k);
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| 285 | String lang = d.getAttribute(GSXML.LANG_ATT);
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[24975] | 286 | if (lang == null || lang.equals(""))
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| 287 | {
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[24221] | 288 | //set the lang to teh default
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| 289 | d.setAttribute(GSXML.LANG_ATT, DEFAULT_LANG);
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| 290 | }
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| 291 | String name = d.getAttribute(GSXML.NAME_ATT);
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| 292 | Element this_item = GSXML.getNamedElement(this.display_item_list, GSXML.DISPLAY_TEXT_ELEM, GSXML.NAME_ATT, name);
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[24975] | 293 | if (this_item == null)
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| 294 | {
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[24221] | 295 | this_item = this.doc.createElement(GSXML.DISPLAY_TEXT_ELEM);
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| 296 | this_item.setAttribute(GSXML.NAME_ATT, name);
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| 297 | this.display_item_list.appendChild(this_item);
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| 298 | }
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[24975] | 299 |
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[24221] | 300 | this_item.appendChild(this.doc.importNode(d, true));
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| 301 | }
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[4942] | 302 | }
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[24975] | 303 |
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[24221] | 304 | return true;
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[4942] | 305 | }
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[24975] | 306 |
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| 307 | protected boolean addPlugins(Element plugin_list)
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| 308 | {
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| 309 | if (plugin_list == null)
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| 310 | return false;
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[24221] | 311 | NodeList pluginNodes = plugin_list.getElementsByTagName(GSXML.PLUGIN_ELEM);
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[24975] | 312 | if (pluginNodes.getLength() > 0)
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| 313 | {
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[24221] | 314 | for (int k = 0; k < pluginNodes.getLength(); k++)
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| 315 | {
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| 316 | this.plugin_item_list.appendChild(this.doc.importNode(pluginNodes.item(k), true));
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| 317 | }
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[13994] | 318 | }
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[24975] | 319 |
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[24221] | 320 | return true;
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[13994] | 321 | }
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[24221] | 322 |
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[24975] | 323 | protected void clearServices()
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| 324 | {
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[24221] | 325 | service_map.clear();
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[24975] | 326 | this.service_list = this.doc.createElement(GSXML.SERVICE_ELEM + GSXML.LIST_MODIFIER);
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[24221] | 327 | }
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[4097] | 328 |
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[24975] | 329 | /**
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| 330 | * creates and configures all the services - extra_info is some more xml
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| 331 | * that is passed to teh service - eg used for coll config files for
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| 332 | * Collection
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| 333 | */
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| 334 | protected boolean configureServiceRackList(Element service_rack_list, Element extra_info)
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| 335 | {
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| 336 |
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[24221] | 337 | // create all the services
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| 338 | NodeList nodes = service_rack_list.getElementsByTagName(GSXML.SERVICE_CLASS_ELEM);
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[24975] | 339 | if (nodes.getLength() == 0)
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| 340 | {
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| 341 | logger.error("ServiceCluster configuration error: cluster " + this.cluster_name + " has no service modules!");
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[24221] | 342 | return false;
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| 343 | }
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[3468] | 344 |
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[24975] | 345 | for (int i = 0; i < nodes.getLength(); i++)
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| 346 | {
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| 347 |
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[24221] | 348 | // the xml request to send to the serviceRack to query what
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| 349 | // services it provides
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| 350 | Element message = this.doc.createElement(GSXML.MESSAGE_ELEM);
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[24993] | 351 | Element request = GSXML.createBasicRequest(this.doc, GSXML.REQUEST_TYPE_DESCRIBE, "", new UserContext());
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[24221] | 352 | message.appendChild(request);
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[3512] | 353 |
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[24975] | 354 | Element n = (Element) nodes.item(i);
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[24221] | 355 | String servicetype = n.getAttribute(GSXML.NAME_ATT);
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[24975] | 356 |
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[24221] | 357 | ServiceRack s = null;
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[24975] | 358 |
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| 359 | try
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| 360 | {
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[24221] | 361 | // try for a default service in standard package
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[24975] | 362 | s = (ServiceRack) Class.forName("org.greenstone.gsdl3.service." + servicetype).newInstance();
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| 363 | }
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| 364 | catch (Exception e)
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| 365 | {
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| 366 | }
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| 367 | if (s == null)
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| 368 | {
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| 369 | try
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| 370 | {
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[24221] | 371 | // name as is, in case package is already specified
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[24975] | 372 | s = (ServiceRack) Class.forName(servicetype).newInstance();
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| 373 | }
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| 374 | catch (Exception e)
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| 375 | {
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| 376 | }
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[24221] | 377 | }
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[3468] | 378 |
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[24975] | 379 | if (s == null)
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| 380 | {
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| 381 | logger.error("Couldn't get an instance of class " + servicetype + ", or org.greenstone.gsdl3.service." + servicetype);
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[24221] | 382 | continue;
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| 383 | }
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[9433] | 384 |
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[25973] | 385 | if (_globalFormat != null)
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| 386 | {
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| 387 | s.setGlobalFormat(_globalFormat);
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| 388 | }
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| 389 |
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[24221] | 390 | s.setSiteHome(this.site_home);
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| 391 | s.setSiteAddress(this.site_http_address);
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| 392 | s.setClusterName(this.cluster_name);
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| 393 | s.setMessageRouter(this.router);
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| 394 | // pass the xml node to the service for configuration
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[24975] | 395 | if (s.configure(n, extra_info))
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| 396 | {
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[24221] | 397 | // find out the supported service types for this service module
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| 398 | Node types = s.process(message);
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[24975] | 399 | NodeList typenodes = ((Element) types).getElementsByTagName(GSXML.SERVICE_ELEM);
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| 400 |
|
---|
| 401 | for (int j = 0; j < typenodes.getLength(); j++)
|
---|
| 402 | {
|
---|
| 403 | String service = ((Element) typenodes.item(j)).getAttribute(GSXML.NAME_ATT);
|
---|
[25750] | 404 |
|
---|
[24975] | 405 | if (service_map.get(service) != null)
|
---|
| 406 | {
|
---|
[24221] | 407 | char extra = '0';
|
---|
[24975] | 408 | String new_service = service + extra;
|
---|
| 409 |
|
---|
| 410 | while (service_map.get(new_service) != null)
|
---|
| 411 | {
|
---|
[24221] | 412 | extra++;
|
---|
[24975] | 413 | new_service = service + extra;
|
---|
[24221] | 414 | }
|
---|
| 415 | this.service_name_map.put(new_service, service);
|
---|
[24975] | 416 | service = new_service;
|
---|
[24221] | 417 | ((Element) typenodes.item(j)).setAttribute(GSXML.NAME_ATT, service);
|
---|
| 418 | }
|
---|
| 419 | this.service_map.put(service, s);
|
---|
| 420 | // also add info to the ServiceInfo XML element
|
---|
| 421 | this.service_list.appendChild(this.doc.importNode(typenodes.item(j), true));
|
---|
| 422 | }
|
---|
| 423 | }
|
---|
[24975] | 424 | }
|
---|
| 425 |
|
---|
[24221] | 426 | return true;
|
---|
[24975] | 427 |
|
---|
[24221] | 428 | }
|
---|
[3468] | 429 |
|
---|
[24221] | 430 | /**
|
---|
[24975] | 431 | * Process an XML document - uses Strings just calls process(Node).
|
---|
| 432 | *
|
---|
| 433 | * @param in
|
---|
| 434 | * the Document to process - a string
|
---|
| 435 | * @return the resultant document as a string - contains any error messages
|
---|
| 436 | * @see String
|
---|
| 437 | */
|
---|
| 438 | public String process(String in)
|
---|
| 439 | {
|
---|
[3468] | 440 |
|
---|
[24221] | 441 | Document doc = this.converter.getDOM(in);
|
---|
[24975] | 442 |
|
---|
[24221] | 443 | Node res = process(doc);
|
---|
| 444 | return this.converter.getString(res);
|
---|
[24975] | 445 |
|
---|
[24221] | 446 | }
|
---|
[3468] | 447 |
|
---|
[24975] | 448 | /**
|
---|
| 449 | * process XML as Node
|
---|
| 450 | *
|
---|
| 451 | */
|
---|
| 452 | public Node process(Node message_node)
|
---|
| 453 | {
|
---|
[24221] | 454 | Element message = this.converter.nodeToElement(message_node);
|
---|
[16688] | 455 |
|
---|
[24221] | 456 | NodeList requests = message.getElementsByTagName(GSXML.REQUEST_ELEM);
|
---|
| 457 | Document mess_doc = message.getOwnerDocument();
|
---|
| 458 | Element mainResult = this.doc.createElement(GSXML.MESSAGE_ELEM);
|
---|
[24975] | 459 | if (requests.getLength() == 0)
|
---|
| 460 | {
|
---|
| 461 | logger.error("no requests for cluster:" + this.cluster_name);
|
---|
[24221] | 462 | // no requests
|
---|
| 463 | return mainResult; // for now
|
---|
| 464 | }
|
---|
[24975] | 465 | for (int i = 0; i < requests.getLength(); i++)
|
---|
| 466 | {
|
---|
| 467 | Element request = (Element) requests.item(i);
|
---|
[24221] | 468 | String to = request.getAttribute(GSXML.TO_ATT);
|
---|
[3468] | 469 |
|
---|
[24221] | 470 | // the cluster name should be first, check, then remove
|
---|
| 471 | String clustername = GSPath.getFirstLink(to);
|
---|
[24975] | 472 | if (!clustername.equals(this.cluster_name))
|
---|
| 473 | {
|
---|
| 474 | logger.error("cluster name wrong! was " + clustername + " should have been " + this.cluster_name);
|
---|
[24221] | 475 | continue; // ignore this request
|
---|
[9433] | 476 | }
|
---|
[24221] | 477 | to = GSPath.removeFirstLink(to);
|
---|
| 478 | request.setAttribute(GSXML.TO_ATT, to);
|
---|
[24975] | 479 |
|
---|
| 480 | if (to.equals(""))
|
---|
| 481 | { // this command is for me
|
---|
[24221] | 482 | Element response = processMessage(request);
|
---|
| 483 | mainResult.appendChild(response);
|
---|
[24975] | 484 |
|
---|
| 485 | }
|
---|
| 486 | else
|
---|
| 487 | { // the request is for one of my services
|
---|
[24221] | 488 | String service = GSPath.getFirstLink(to);
|
---|
[24975] | 489 |
|
---|
| 490 | if (!this.service_map.containsKey(service))
|
---|
| 491 | {
|
---|
| 492 | logger.error("non-existant service, " + service + ", specified!");
|
---|
[24221] | 493 | continue;
|
---|
| 494 | }
|
---|
| 495 | String real_service = service;
|
---|
[24975] | 496 | if (this.service_name_map.containsKey(service))
|
---|
| 497 | {
|
---|
[25635] | 498 | real_service = this.service_name_map.get(service);
|
---|
[24221] | 499 | // need to change the to att in the request - give the real service name
|
---|
| 500 | to = request.getAttribute(GSXML.TO_ATT);
|
---|
| 501 | String old_to = to;
|
---|
| 502 | to = GSPath.replaceFirstLink(to, real_service);
|
---|
| 503 | request.setAttribute(GSXML.TO_ATT, to);
|
---|
| 504 | }
|
---|
| 505 | // have to pass the request to the service
|
---|
| 506 | Element single_message = mess_doc.createElement(GSXML.MESSAGE_ELEM);
|
---|
| 507 | single_message.appendChild(request);
|
---|
[25750] | 508 |
|
---|
[25635] | 509 | Node response_message = this.service_map.get(service).process(single_message);
|
---|
[24975] | 510 | if (response_message != null)
|
---|
| 511 | {
|
---|
[24221] | 512 | Element response = (Element) GSXML.getChildByTagName(response_message, GSXML.RESPONSE_ELEM);
|
---|
| 513 | String from = response.getAttribute(GSXML.FROM_ATT);
|
---|
[24975] | 514 | if (!real_service.equals(service))
|
---|
| 515 | {
|
---|
[24221] | 516 | // replace the real service name with the pseudo service name
|
---|
| 517 | from = GSPath.replaceFirstLink(from, service);
|
---|
| 518 | // also need to do it in the service itself
|
---|
| 519 | // shoudl this be done here??
|
---|
| 520 | Element service_elem = (Element) GSXML.getChildByTagName(response, GSXML.SERVICE_ELEM);
|
---|
[24975] | 521 | if (service_elem != null)
|
---|
| 522 | {
|
---|
[24221] | 523 | service_elem.setAttribute(GSXML.NAME_ATT, service);
|
---|
| 524 | }
|
---|
| 525 | }
|
---|
| 526 | from = GSPath.prependLink(from, this.cluster_name);
|
---|
| 527 | response.setAttribute(GSXML.FROM_ATT, from);
|
---|
| 528 | mainResult.appendChild(this.doc.importNode(response, true));
|
---|
| 529 | }
|
---|
[24975] | 530 |
|
---|
[24221] | 531 | } // else
|
---|
[24975] | 532 |
|
---|
[24221] | 533 | } // for each request
|
---|
| 534 | return mainResult;
|
---|
| 535 | }
|
---|
[4097] | 536 |
|
---|
[24975] | 537 | /**
|
---|
| 538 | * handles requests made to the ServiceCluster itself
|
---|
| 539 | *
|
---|
| 540 | * @param req
|
---|
| 541 | * - the request Element- <request>
|
---|
| 542 | * @return the result Element - should be <response>
|
---|
| 543 | */
|
---|
| 544 | protected Element processMessage(Element request)
|
---|
| 545 | {
|
---|
[24221] | 546 | Element response = this.doc.createElement(GSXML.RESPONSE_ELEM);
|
---|
| 547 | response.setAttribute(GSXML.FROM_ATT, this.cluster_name);
|
---|
| 548 | String type = request.getAttribute(GSXML.TYPE_ATT);
|
---|
| 549 | String lang = request.getAttribute(GSXML.LANG_ATT);
|
---|
| 550 | response.setAttribute(GSXML.TYPE_ATT, type);
|
---|
[24975] | 551 |
|
---|
| 552 | if (type.equals(GSXML.REQUEST_TYPE_DESCRIBE))
|
---|
| 553 | {
|
---|
[24221] | 554 | // create the collection element
|
---|
[24975] | 555 | Element description = (Element) this.description.cloneNode(false);
|
---|
[25750] | 556 | // set collection type : mg, mgpp, lucene or solr
|
---|
[24221] | 557 | description.setAttribute(GSXML.TYPE_ATT, col_type);
|
---|
| 558 | description.setAttribute(GSXML.DB_TYPE_ATT, db_type);
|
---|
[14640] | 559 |
|
---|
[24221] | 560 | response.appendChild(description);
|
---|
| 561 | // check the param list
|
---|
[24975] | 562 | Element param_list = (Element) GSXML.getChildByTagName(request, GSXML.PARAM_ELEM + GSXML.LIST_MODIFIER);
|
---|
| 563 | if (param_list == null)
|
---|
| 564 | {
|
---|
| 565 | addAllDisplayInfo(description, lang);
|
---|
[24221] | 566 | description.appendChild(this.service_list);
|
---|
| 567 | description.appendChild(this.metadata_list);
|
---|
| 568 | description.appendChild(this.plugin_item_list);
|
---|
| 569 | return response;
|
---|
| 570 | }
|
---|
[24975] | 571 |
|
---|
[24221] | 572 | // go through the param list and see what components are wanted
|
---|
| 573 | NodeList params = param_list.getElementsByTagName(GSXML.PARAM_ELEM);
|
---|
[24975] | 574 | for (int i = 0; i < params.getLength(); i++)
|
---|
| 575 | {
|
---|
| 576 |
|
---|
| 577 | Element param = (Element) params.item(i);
|
---|
[24221] | 578 | // Identify the structure information desired
|
---|
[24975] | 579 | if (param.getAttribute(GSXML.NAME_ATT).equals(GSXML.SUBSET_PARAM))
|
---|
| 580 | {
|
---|
[24221] | 581 | String info = param.getAttribute(GSXML.VALUE_ATT);
|
---|
[24975] | 582 | if (info.equals(GSXML.SERVICE_ELEM + GSXML.LIST_MODIFIER))
|
---|
| 583 | {
|
---|
[24221] | 584 | description.appendChild(this.service_list);
|
---|
[24975] | 585 | }
|
---|
| 586 | else if (info.equals(GSXML.METADATA_ELEM + GSXML.LIST_MODIFIER))
|
---|
| 587 | {
|
---|
[24221] | 588 | description.appendChild(metadata_list);
|
---|
[24975] | 589 | }
|
---|
| 590 | else if (info.equals(GSXML.DISPLAY_TEXT_ELEM + GSXML.LIST_MODIFIER))
|
---|
| 591 | {
|
---|
[24221] | 592 | addAllDisplayInfo(description, lang);
|
---|
[24975] | 593 | }
|
---|
| 594 | else if (info.equals(GSXML.PLUGIN_ELEM + GSXML.LIST_MODIFIER))
|
---|
| 595 | {
|
---|
[24221] | 596 | description.appendChild(plugin_item_list);
|
---|
| 597 | }
|
---|
| 598 | }
|
---|
| 599 | }
|
---|
| 600 | return response;
|
---|
[4097] | 601 | }
|
---|
[24221] | 602 | /*
|
---|
[24975] | 603 | * if (type.equals(GSXML.REQUEST_TYPE_FORMAT_STRING)) {
|
---|
| 604 | * logger.error("Received format string request"); String service =
|
---|
| 605 | * request.getAttribute("service"); logger.error("Service is " +
|
---|
| 606 | * service); String classifier = null;
|
---|
| 607 | * if(service.equals("ClassifierBrowse")) { classifier =
|
---|
| 608 | * request.getAttribute("classifier"); logger.error("Classifier is " +
|
---|
| 609 | * classifier); } Element format_element = (Element)
|
---|
| 610 | * GSXML.getChildByTagName(request, GSXML.FORMAT_STRING_ELEM); String
|
---|
| 611 | * format_string = GSXML.getNodeText(format_element);
|
---|
| 612 | * logger.error("Format string: " + format_string);
|
---|
| 613 | * logger.error("Config file location = " +
|
---|
| 614 | * GSFile.collectionConfigFile(this.site_home, this.cluster_name));
|
---|
| 615 | *
|
---|
| 616 | * // check for version file
|
---|
| 617 | *
|
---|
| 618 | * String directory = new
|
---|
| 619 | * File(GSFile.collectionConfigFile(this.site_home,
|
---|
| 620 | * this.cluster_name)).getParent() + File.pathSeparator;
|
---|
| 621 | * logger.error("Directory is " + directory);
|
---|
| 622 | *
|
---|
| 623 | * String version_filename = "";
|
---|
| 624 | *
|
---|
| 625 | * if(service.equals("ClassifierBrowse")) version_filename = directory +
|
---|
| 626 | * "browse_"+classifier+"_format_statement_version.txt"; else
|
---|
| 627 | * version_filename = directory + "query_format_statement_version.txt";
|
---|
| 628 | *
|
---|
| 629 | * File version_file = new File(version_filename);
|
---|
| 630 | * logger.error("Version filename is " + version_filename);
|
---|
| 631 | *
|
---|
| 632 | * String version_number = "1"; BufferedWriter writer; // = new
|
---|
| 633 | * BufferedWriter(new FileWriter(version_filename)); //RandomAccessFile
|
---|
| 634 | * version_file_random_access;
|
---|
| 635 | *
|
---|
| 636 | * try{
|
---|
| 637 | *
|
---|
| 638 | * if(version_file.exists()) { // Read version BufferedReader reader =
|
---|
| 639 | * new BufferedReader(new FileReader(version_filename));
|
---|
| 640 | * //version_file_random_access = new RandomAccessFile(version_file,
|
---|
| 641 | * "r"); //logger.error(" //version_number =
|
---|
| 642 | * version_file_random_access.readInt(); version_number =
|
---|
| 643 | * reader.readLine(); int aInt = Integer.parseInt(version_number) + 1;
|
---|
| 644 | * version_number = Integer.toString(aInt); reader.close();
|
---|
| 645 | * //version_file_random_access.close(); } else{ // Create
|
---|
| 646 | * version_file.createNewFile(); // write 1 to file writer = new
|
---|
| 647 | * BufferedWriter(new FileWriter(version_filename));
|
---|
| 648 | * //version_file_random_access = new RandomAccessFile(version_file,
|
---|
| 649 | * "w"); //version_file_random_access.writeInt(version_number);
|
---|
| 650 | * writer.write(version_number); writer.close();
|
---|
| 651 | * //version_file_random_access.close(); }
|
---|
| 652 | *
|
---|
| 653 | * // Write version file String format_statement_filename = "";
|
---|
| 654 | *
|
---|
| 655 | * if(service.equals("ClassifierBrowse")) format_statement_filename =
|
---|
| 656 | * directory + "browse_"+classifier+"_format_statement_v" +
|
---|
| 657 | * version_number + ".txt"; else format_statement_filename = directory +
|
---|
| 658 | * "query_format_statement_v" + version_number + ".txt";
|
---|
| 659 | *
|
---|
| 660 | * logger.error("Format statement filename is " +
|
---|
| 661 | * format_statement_filename);
|
---|
| 662 | *
|
---|
| 663 | * writer = new BufferedWriter(new
|
---|
| 664 | * FileWriter(format_statement_filename)); writer.write(format_string);
|
---|
| 665 | * writer.close();
|
---|
| 666 | *
|
---|
| 667 | * // Update version number //version_file_random_access = new
|
---|
| 668 | * RandomAccessFile(version_file, "w");
|
---|
| 669 | * //version_file_random_access.writeInt(version_number);
|
---|
| 670 | * //version_file_random_access.close();
|
---|
| 671 | *
|
---|
| 672 | * writer = new BufferedWriter(new FileWriter(version_filename));
|
---|
| 673 | * //version_file_random_access = new RandomAccessFile(version_file,
|
---|
| 674 | * "w"); //version_file_random_access.writeInt(version_number);
|
---|
| 675 | * writer.write(version_number); writer.close();
|
---|
| 676 | *
|
---|
| 677 | *
|
---|
| 678 | *
|
---|
| 679 | * } catch (IOException e) { logger.error("IO Exception "+e);
|
---|
| 680 | * //System.exit(1); }
|
---|
| 681 | *
|
---|
| 682 | *
|
---|
| 683 | * }
|
---|
| 684 | */
|
---|
| 685 | if (type.equals(GSXML.REQUEST_TYPE_SYSTEM))
|
---|
[24221] | 686 | {
|
---|
[24975] | 687 | response = processSystemRequest(request);
|
---|
[24221] | 688 | }
|
---|
| 689 | else
|
---|
[24975] | 690 | { // unknown type
|
---|
| 691 | logger.error("cant handle request of type " + type);
|
---|
[23417] | 692 |
|
---|
[24221] | 693 | }
|
---|
| 694 | return response;
|
---|
[4097] | 695 | }
|
---|
| 696 |
|
---|
[24975] | 697 | protected Element processSystemRequest(Element request)
|
---|
| 698 | {
|
---|
[4097] | 699 |
|
---|
[24221] | 700 | Element response = this.doc.createElement(GSXML.RESPONSE_ELEM);
|
---|
| 701 | response.setAttribute(GSXML.FROM_ATT, this.cluster_name);
|
---|
| 702 | response.setAttribute(GSXML.TYPE_ATT, GSXML.REQUEST_TYPE_SYSTEM);
|
---|
[4097] | 703 |
|
---|
[24221] | 704 | // a list of system requests - should put any error messages
|
---|
| 705 | // or success messages into response
|
---|
| 706 | NodeList commands = request.getElementsByTagName(GSXML.SYSTEM_ELEM);
|
---|
[24975] | 707 | String message = null;
|
---|
| 708 | for (int i = 0; i < commands.getLength(); i++)
|
---|
| 709 | {
|
---|
[24221] | 710 | // all the commands should be Elements
|
---|
[24975] | 711 | Element elem = (Element) commands.item(i);
|
---|
[24221] | 712 | String action = elem.getAttribute(GSXML.TYPE_ATT);
|
---|
[24975] | 713 | if (action.equals(GSXML.SYSTEM_TYPE_CONFIGURE))
|
---|
| 714 | {
|
---|
[24221] | 715 | String subset = elem.getAttribute(GSXML.SYSTEM_SUBSET_ATT);
|
---|
[24975] | 716 | if (subset.equals(""))
|
---|
| 717 | {
|
---|
[24221] | 718 | // need to reconfigure the service cluster
|
---|
[24975] | 719 |
|
---|
| 720 | if (this.configure())
|
---|
| 721 | {
|
---|
[24221] | 722 | Element s = GSXML.createTextElement(this.doc, GSXML.STATUS_ELEM, this.cluster_name + " reconfigured");
|
---|
| 723 | response.appendChild(s);
|
---|
[24975] | 724 |
|
---|
| 725 | }
|
---|
| 726 | else
|
---|
| 727 | {
|
---|
[24221] | 728 | Element s = GSXML.createTextElement(this.doc, GSXML.STATUS_ELEM, this.cluster_name + " could not be reconfigured");
|
---|
[24975] | 729 | response.appendChild(s);
|
---|
[24221] | 730 | }
|
---|
[24975] | 731 | }
|
---|
| 732 | else if (this.configureSubset(subset))
|
---|
| 733 | {
|
---|
| 734 | Element s = GSXML.createTextElement(this.doc, GSXML.STATUS_ELEM, this.cluster_name + " " + subset + " reconfigured");
|
---|
[24221] | 735 | response.appendChild(s);
|
---|
| 736 | }
|
---|
[24975] | 737 | else
|
---|
| 738 | {
|
---|
| 739 | Element s = GSXML.createTextElement(this.doc, GSXML.STATUS_ELEM, this.cluster_name + " " + subset + " could not be reconfigured");
|
---|
| 740 | response.appendChild(s);
|
---|
| 741 | }
|
---|
[24221] | 742 | continue;
|
---|
| 743 | } // configure action
|
---|
[24975] | 744 |
|
---|
[24221] | 745 | String module_name = elem.getAttribute(GSXML.SYSTEM_MODULE_NAME_ATT);
|
---|
| 746 | String module_type = elem.getAttribute(GSXML.SYSTEM_MODULE_TYPE_ATT);
|
---|
[24975] | 747 | if (action.equals(GSXML.SYSTEM_TYPE_ACTIVATE))
|
---|
| 748 | {
|
---|
[24221] | 749 | Element s = GSXML.createTextElement(this.doc, GSXML.STATUS_ELEM, "activate action not yet implemented - does it even make sense in this context??");
|
---|
| 750 | response.appendChild(s);
|
---|
[24975] | 751 | }
|
---|
| 752 | else if (action.equals(GSXML.SYSTEM_TYPE_DEACTIVATE))
|
---|
| 753 | {
|
---|
| 754 | if (module_type.equals(GSXML.SERVICE_ELEM))
|
---|
| 755 | {
|
---|
[24221] | 756 | // deactivate the service
|
---|
| 757 | // remove from service_map
|
---|
| 758 | this.service_map.remove(module_name);
|
---|
| 759 | Element service_elem = GSXML.getNamedElement(this.service_list, GSXML.SERVICE_ELEM, GSXML.NAME_ATT, module_name);
|
---|
[24975] | 760 | service_list.removeChild(service_elem);
|
---|
| 761 | message = module_type + ": " + module_name + " deactivated";
|
---|
| 762 | }
|
---|
| 763 | else
|
---|
| 764 | {
|
---|
| 765 | message = "can't deactivate " + module_type + " type modules!";
|
---|
| 766 | }
|
---|
[24221] | 767 | Element s = GSXML.createTextElement(this.doc, GSXML.STATUS_ELEM, message);
|
---|
| 768 | response.appendChild(s);
|
---|
[24975] | 769 | }
|
---|
| 770 | else
|
---|
| 771 | {
|
---|
| 772 | logger.error("cant process system request, action " + action);
|
---|
[24221] | 773 | continue;
|
---|
| 774 | }
|
---|
| 775 | } // for each command
|
---|
| 776 | return response;
|
---|
| 777 | }
|
---|
| 778 |
|
---|
[24975] | 779 | /**
|
---|
| 780 | * do a configure on only part of the collection
|
---|
| 781 | */
|
---|
| 782 | protected boolean configureSubset(String subset)
|
---|
| 783 | {
|
---|
| 784 |
|
---|
[24221] | 785 | File configFile = new File(GSFile.siteConfigFile(this.site_home));
|
---|
[24975] | 786 | if (!configFile.exists())
|
---|
| 787 | {
|
---|
| 788 | logger.error("site config file: " + configFile.getPath() + " not found!");
|
---|
[24221] | 789 | // wont be able to do any of the requests
|
---|
| 790 | return false;
|
---|
[24975] | 791 |
|
---|
[4097] | 792 | }
|
---|
[24975] | 793 |
|
---|
| 794 | Document site_config_doc = this.converter.getDOM(configFile);
|
---|
| 795 | if (site_config_doc == null)
|
---|
| 796 | {
|
---|
| 797 | logger.error("could not read in site config file: " + configFile.getPath());
|
---|
[24221] | 798 | return false;
|
---|
| 799 | }
|
---|
[24975] | 800 |
|
---|
[24221] | 801 | Element site_config_elem = site_config_doc.getDocumentElement();
|
---|
[24975] | 802 | Element cluster_config_elem = GSXML.getNamedElement((Element) GSXML.getChildByTagName(site_config_elem, GSXML.CLUSTER_ELEM + GSXML.LIST_MODIFIER), GSXML.CLUSTER_ELEM, GSXML.NAME_ATT, this.cluster_name);
|
---|
| 803 | if (cluster_config_elem == null)
|
---|
| 804 | {
|
---|
| 805 | logger.error("site config file: " + configFile.getPath() + " has no element for cluster " + this.cluster_name);
|
---|
[24221] | 806 | // wont be able to do any of teh requests
|
---|
| 807 | return false;
|
---|
[24975] | 808 |
|
---|
[24221] | 809 | }
|
---|
[24975] | 810 | if (subset.equals(GSXML.SERVICE_ELEM + GSXML.LIST_MODIFIER))
|
---|
| 811 | {
|
---|
| 812 | Element service_rack_list = (Element) GSXML.getChildByTagName(cluster_config_elem, GSXML.SERVICE_CLASS_ELEM + GSXML.LIST_MODIFIER);
|
---|
[24221] | 813 | clearServices();
|
---|
| 814 | return configureServiceRackList(service_rack_list, null);
|
---|
[24975] | 815 | }
|
---|
| 816 | else if (subset.equals(GSXML.METADATA_ELEM + GSXML.LIST_MODIFIER))
|
---|
| 817 | {
|
---|
| 818 | this.metadata_list = this.doc.createElement(GSXML.METADATA_ELEM + GSXML.LIST_MODIFIER);
|
---|
| 819 | Element metadata_list = (Element) GSXML.getChildByTagName(cluster_config_elem, GSXML.METADATA_ELEM + GSXML.LIST_MODIFIER);
|
---|
[24221] | 820 | return addMetadata(metadata_list);
|
---|
[24975] | 821 | }
|
---|
| 822 | else if (subset.equals(GSXML.PLUGIN_ELEM + GSXML.LIST_MODIFIER))
|
---|
| 823 | {
|
---|
| 824 | this.plugin_item_list = this.doc.createElement(GSXML.PLUGIN_ELEM + GSXML.LIST_MODIFIER);
|
---|
| 825 | Element import_list = (Element) GSXML.getChildByTagName(cluster_config_elem, GSXML.IMPORT_ELEM);
|
---|
[24221] | 826 | if (import_list != null)
|
---|
| 827 | {
|
---|
[24975] | 828 | Element plugin_item_list = (Element) GSXML.getChildByTagName(cluster_config_elem, GSXML.PLUGIN_ELEM + GSXML.LIST_MODIFIER);
|
---|
[24221] | 829 | return addPlugins(plugin_item_list);
|
---|
| 830 | }
|
---|
| 831 | else
|
---|
[24975] | 832 | return false;
|
---|
| 833 | }
|
---|
| 834 | else
|
---|
| 835 | {
|
---|
| 836 | logger.error("cannot process system request, configure " + subset);
|
---|
[24221] | 837 | return false;
|
---|
[24975] | 838 | }
|
---|
[4105] | 839 |
|
---|
[24975] | 840 | }
|
---|
[4105] | 841 |
|
---|
[24975] | 842 | protected boolean addAllDisplayInfo(Element description, String lang)
|
---|
| 843 | {
|
---|
[4267] | 844 |
|
---|
[24221] | 845 | NodeList items = this.display_item_list.getChildNodes();
|
---|
[24975] | 846 | for (int i = 0; i < items.getLength(); i++)
|
---|
| 847 | { // for each key
|
---|
[24221] | 848 | Element m = (Element) items.item(i);
|
---|
| 849 | // find the child with the correct language
|
---|
| 850 | Element new_m = GSXML.getNamedElement(m, GSXML.DISPLAY_TEXT_ELEM, GSXML.LANG_ATT, lang);
|
---|
[24975] | 851 | if (new_m == null && lang != DEFAULT_LANG)
|
---|
| 852 | {
|
---|
[24221] | 853 | // use the default lang
|
---|
| 854 | new_m = GSXML.getNamedElement(m, GSXML.DISPLAY_TEXT_ELEM, GSXML.LANG_ATT, DEFAULT_LANG);
|
---|
| 855 | }
|
---|
[24975] | 856 | if (new_m == null)
|
---|
| 857 | {
|
---|
[24221] | 858 | // just get the first one
|
---|
[24975] | 859 | new_m = (Element) GSXML.getChildByTagName(m, GSXML.DISPLAY_TEXT_ELEM);
|
---|
[24221] | 860 | }
|
---|
| 861 | description.appendChild(new_m.cloneNode(true));
|
---|
| 862 | }
|
---|
| 863 | return true;
|
---|
[24975] | 864 |
|
---|
[4267] | 865 | }
|
---|
[4942] | 866 |
|
---|
[24975] | 867 | protected Element getDisplayTextElement(String key, String lang)
|
---|
| 868 | {
|
---|
| 869 |
|
---|
[24221] | 870 | Element this_item = GSXML.getNamedElement(this.display_item_list, GSXML.DISPLAY_TEXT_ELEM, GSXML.NAME_ATT, key);
|
---|
[24975] | 871 | if (this_item == null)
|
---|
| 872 | {
|
---|
[24221] | 873 | return null;
|
---|
| 874 | }
|
---|
[4942] | 875 |
|
---|
[24221] | 876 | Element this_lang = GSXML.getNamedElement(this_item, GSXML.DISPLAY_TEXT_ELEM, GSXML.LANG_ATT, lang);
|
---|
[24975] | 877 | if (this_lang == null && lang != DEFAULT_LANG)
|
---|
| 878 | {
|
---|
[24221] | 879 | // try the default
|
---|
| 880 | this_lang = GSXML.getNamedElement(this_item, GSXML.DISPLAY_TEXT_ELEM, GSXML.LANG_ATT, DEFAULT_LANG);
|
---|
| 881 | }
|
---|
[24975] | 882 | if (this_lang == null)
|
---|
| 883 | {
|
---|
[24221] | 884 | // just return the first one
|
---|
| 885 | return GSXML.getFirstElementChild(this_item);//(Element)this_item.getFirstChild().cloneNode(true);
|
---|
| 886 | }
|
---|
[24975] | 887 | return (Element) this_lang.cloneNode(true);
|
---|
| 888 |
|
---|
[4942] | 889 | }
|
---|
[24975] | 890 |
|
---|
[25635] | 891 | public HashMap<String, ServiceRack> getServiceMap()
|
---|
[24975] | 892 | {
|
---|
[24221] | 893 | return service_map;
|
---|
[4942] | 894 | }
|
---|
[3468] | 895 | }
|
---|