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1
10 package org.mmbase.module.builders;
11
12 import java.util.*;
13
14 import org.mmbase.core.event.NodeEvent;
15 import org.mmbase.module.core.*;
16 import org.mmbase.util.logging.*;
17
18
23 public class Versions extends MMObjectBuilder implements MMBaseObserver {
24
25 private static final Logger log = Logging.getLoggerInstance(Versions.class);
26
27 private Hashtable cacheVersionHandlers = new Hashtable();
28
29 private Map versionsCache = new Hashtable();
30
31 private boolean initialized = false;
32
33
36 public boolean init() {
37 if (!initialized) {
38 super.init();
39 startCacheTypes();
40 List versionNodes = getNodes();
41 for (Iterator iter = versionNodes.iterator(); iter.hasNext();) {
42 MMObjectNode versionNode = (MMObjectNode) iter.next();
43 String  name = versionNode.getStringValue("name");
44 String type = versionNode.getStringValue("type");
45 Integer number = new Integer (versionNode.getNumber());
46
47 String key = type + "_" + name;
48 if (versionsCache.containsKey(key)) {
49 StringBuffer sb = new StringBuffer ();
50 sb.append("versions node[number,version,maintainer]:");
51 sb.append("[");
52 sb.append(versionNode.getNumber());
53 sb.append(",");
54 sb.append(versionNode.getIntValue("version"));
55 sb.append(",");
56 sb.append(versionNode.getStringValue("maintainer"));
57 sb.append("]");
58 log.warn("more than one version was found for " + type + " with name " + name + " ." + sb.toString());
59 }
60 else {
61 versionsCache.put(key, number);
62 }
63 }
64
65 initialized = true;
66 }
67
68 return true;
69 }
70
71
79 public MMObjectNode getVersionNode(String name, String type) {
80 MMObjectNode retval = null;
81
82 String key = type + "_" + name;
83 if (versionsCache.containsKey(key)) {
84 Integer number = (Integer ) versionsCache.get(key);
85 retval = getNode(number.intValue());
86 }
87 return retval;
88 }
89
90
93 public int getInstalledVersion(String name, String type) {
94 MMObjectNode node = getVersionNode(name, type);
95 if (node == null) { return -1; }
96 return node.getIntValue("version");
97 }
98
99
102 public void setInstalledVersion(String name, String type, String maintainer, int version) {
103
104 MMObjectNode node = getVersionNode(name, type);
105 if (node == null) {
106 node = getNewNode("system");
107 node.setValue("name", name);
108 node.setValue("type", type);
109 node.setValue("maintainer", maintainer);
110 node.setValue("version", version);
111 int number = insert("system", node);
112
113 String key = type + "_" + name;
114 versionsCache.put(key, new Integer (number));
115 } else {
116 node.setValue("maintainer", maintainer);
117 node.setValue("version", version);
118 node.commit();
119 }
120 }
121
122
125 public void updateInstalledVersion(String name, String type, String maintainer, int version) {
126 setInstalledVersion(name, type, maintainer, version);
127 }
128
129
132 public void startCacheTypes() {
133 String cacheversionfile = getInitParameter("cacheversionfile");
135
136 if (cacheversionfile != null && !cacheversionfile.equals("")) {
137 VersionXMLCacheNodeReader parser = new VersionXMLCacheNodeReader(cacheversionfile);
138 parser.setBuilder(this);
139 cacheVersionHandlers = parser.getCacheVersions(cacheVersionHandlers);
140 }
141 for (Enumeration e = cacheVersionHandlers.keys(); e.hasMoreElements();) {
142 String bname = (String ) e.nextElement();
143 mmb.addLocalObserver(bname, this);
144 mmb.addRemoteObserver(bname, this);
145 }
146 }
147
148
152 public void notify(NodeEvent event) {
153 if (log.isDebugEnabled()) {
154 log.debug("Changed " + event.getMachine() + " " + event.getNodeNumber() + " "
155 + event.getBuilderName() + " " + NodeEvent.newTypeToOldType(event.getType()));
156 }
157 String builder = event.getBuilderName();
158 Vector subs = (Vector) cacheVersionHandlers.get(builder);
159 int inumber = event.getNodeNumber();
160 if (subs != null) {
161 for (Enumeration e = subs.elements(); e.hasMoreElements();) {
162 VersionCacheNode cnode = (VersionCacheNode) e.nextElement();
163 cnode.handleChanged(builder, inumber);
164 }
165 }
166 super.notify(event);
167 }
168 }
169
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