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1 package org.sapia.soto.state;
2
3 import org.sapia.soto.Debug;
4 import org.sapia.soto.Env;
5 import org.sapia.soto.EnvAware;
6 import org.sapia.soto.SotoContainer;
7 import org.sapia.soto.config.Include;
8 import org.sapia.soto.util.Resource;
9
10 import org.sapia.util.xml.confix.ConfigurationException;
11 import org.sapia.util.xml.confix.ObjectCreationCallback;
12 import org.sapia.util.xml.confix.ObjectHandlerIF;
13
14
15
23 public class Module implements ObjectHandlerIF, EnvAware,
24 ObjectCreationCallback {
25 private static final long NOT_MODIFIED = -1;
26 private String  _name;
27 private String _uri;
28 private StateMachine _stm;
29 private boolean _inheritGlobals;
30 private boolean _inheritModules;
31 private Include _include;
32 private long _lastModified = NOT_MODIFIED;
33 private Resource _toMonitor;
34 private SotoContainer.EnvImpl _env;
35
36 public Module() {
37 }
38
39 public StateMachine getStateMachine(boolean reload) {
40 if (reload && (_lastModified > NOT_MODIFIED) &&
41 (_lastModified != _toMonitor.lastModified())) {
42 synchronized (this) {
43 if (_lastModified != _toMonitor.lastModified()) {
44 if (Debug.DEBUG) {
45 Debug.debug("Module " + _name + " modified (" + _toMonitor +
46 "); reloading...");
47 }
48
49 try {
50 StateMachine newStm = (StateMachine) _include.onCreate();
51 newStm.getStmContext()._parent = _stm.getStmContext().getParent();
52
53 if (_inheritGlobals && (newStm.getStmContext()._globals != null)) {
54 newStm.getStmContext()._globals.setParent(_stm.getStmContext()
55 .getParent()
56 .getStmContext()._globals);
57 }
58
59 if (_inheritModules) {
60 newStm.getStmContext()._inheritModules = true;
61 }
62
63 newStm.init();
64 _stm = newStm;
65 } catch (ConfigurationException e) {
66 throw new ModuleReloadRuntimeException("Could not reload state machine", e);
67 }
68
69 if (Debug.DEBUG) {
70 Debug.debug("Module reloaded");
71 }
72
73 _lastModified = _toMonitor.lastModified();
74 }
75 }
76 }
77
78 return _stm;
79 }
80
81 public String getName() {
82 return _name;
83 }
84
85 public void setName(String name) {
86 _name = name;
87 }
88
89 public void setInheritGlobals(boolean inherit) {
90 _inheritGlobals = inherit;
91 }
92
93 public boolean isInheritGlobals() {
94 return _inheritGlobals;
95 }
96
97 public void setInheritModules(boolean inherit) {
98 _inheritModules = inherit;
99 }
100
101 public boolean isInheritModules() {
102 return _inheritModules;
103 }
104
105 public void setStateMachine(StateMachine stm) throws ConfigurationException {
106 if (_stm != null) {
107 throw new ConfigurationException("State machine already set for module: " +
108 getName());
109 }
110
111 _stm = stm;
112 }
113
114
117 public void setEnv(Env env) {
118 if (env instanceof SotoContainer.EnvImpl) {
119 _env = (SotoContainer.EnvImpl) env;
120 }
121 }
122
123 public void setUri(String uri) {
124 _uri = uri;
125 }
126
127
130 public Object onCreate() throws ConfigurationException {
131 if ((_stm == null) && (_uri != null) && (_env != null)) {
132 _include = new Include(_env.getContainer(),
133 _env.getContainer().getApplicationFactory());
134 _include.setUri(_uri);
135 _stm = (StateMachine) _include.onCreate();
136
137 Resource res = _include.getResource();
138 Debug.debug("======> checking: " + res);
139 _toMonitor = res;
140 _lastModified = _toMonitor.lastModified();
141 }
142
143 return this;
144 }
145
146
149 public void handleObject(String name, Object obj)
150 throws ConfigurationException {
151 if (obj instanceof StateMachine) {
152 setStateMachine((StateMachine) obj);
153 }
154 }
155 }
156 |
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