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1
10
11 package org.picocontainer.defaults;
12
13 import org.picocontainer.Disposable;
14 import org.picocontainer.LifecycleManager;
15 import org.picocontainer.PicoContainer;
16 import org.picocontainer.Startable;
17
18 import java.io.Serializable  ;
19 import java.lang.reflect.Method ;
20 import java.util.List ;
21
22
37 public class DefaultLifecycleManager implements LifecycleManager, Serializable {
38
39 private ComponentMonitor componentMonitor;
40
41 protected static Method startMethod = null;
42 protected static Method stopMethod = null;
43 protected static Method disposeMethod = null;
44
45 private static Object [] emptyArray = new Object [0];
46
47 static {
48 try {
49 startMethod = Startable.class.getMethod("start", new Class [0]);
50 stopMethod = Startable.class.getMethod("stop", new Class [0]);
51 disposeMethod = Disposable.class.getMethod("dispose", new Class [0]);
52 } catch (NoSuchMethodException e) {
53 }
54 }
55
56 public DefaultLifecycleManager(ComponentMonitor componentMonitor) {
57 this.componentMonitor = componentMonitor;
58 }
59
60 public DefaultLifecycleManager() {
61 this.componentMonitor = NullComponentMonitor.getInstance();
62 }
63
64 public void start(PicoContainer node) {
65 List startables = node.getComponentInstancesOfType(Startable.class);
66 for (int i = 0; i < startables.size(); i++) {
67 doMethod(startMethod ,startables.get(i));
68 }
69 }
70
71 public void stop(PicoContainer node) {
72 List startables = node.getComponentInstancesOfType(Startable.class);
73 for (int i = startables.size() -1 ; 0 <= i; i--) {
74 doMethod(stopMethod ,startables.get(i));
75 }
76 }
77
78 public void dispose(PicoContainer node) {
79 List disposables = node.getComponentInstancesOfType(Disposable.class);
80 for (int i = disposables.size() -1 ; 0 <= i; i--) {
81 doMethod(disposeMethod, disposables.get(i));
82 }
83 }
84
85 protected void doMethod(Method method, Object instance) {
86 componentMonitor.invoking(method, instance);
87 try {
88 long beginTime = System.currentTimeMillis();
89 method.invoke(instance, emptyArray);
90 componentMonitor.invoked(method, instance, System.currentTimeMillis() - beginTime);
91 } catch (Exception e) {
92 invocationFailed(method, instance, e);
93 }
94 }
95
96 protected void invocationFailed(Method method, Object instance, Exception e) {
97 componentMonitor.invocationFailed(method, instance, e);
98 throw new org.picocontainer.PicoInitializationException("Method '" + method.getName()
99 + "' failed on instance '" + instance+ "' for reason '" + e.getMessage() + "'", e);
100 }
101
102 }
103 |
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