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1 package com.tirsen.nanning.samples.prevayler;
2
3 import java.lang.reflect.InvocationTargetException  ;
4 import java.lang.reflect.Method ;
5 import java.util.Arrays ;
6 import java.util.Collections ;
7 import java.util.List ;
8
9 import javax.security.auth.Subject ;
10
11 import com.tirsen.nanning.Invocation;
12 import org.prevayler.util.clock.ClockedSystem;
13 import org.prevayler.util.clock.ClockedTransaction;
14 import org.apache.commons.logging.Log;
15 import org.apache.commons.logging.LogFactory;
16
17 public class InvokeCommand extends ClockedTransaction {
18 private static final Log logger = LogFactory.getLog(InvokeCommand.class);
19 static final long serialVersionUID = 320681517664792343L;
20
21 private AuthenticatedCall call;
22
23 public InvokeCommand(Invocation invocation, boolean resolveEntities) throws Exception {
24 if (resolveEntities) {
25 call = new IdentifyingCall(invocation);
26
27 } else {
28 call = new AuthenticatedCall(invocation);
29 }
30 }
31
32 protected Object executeClocked(ClockedSystem system) throws Exception {
33 Object prev = null;
34 if (CurrentPrevayler.isInitialized()) {
35 prev = CurrentPrevayler.getSystem();
36 }
37 if (!CurrentPrevayler.hasSystem() || CurrentPrevayler.getSystem() != system) {
38 CurrentPrevayler.setSystem(system);
39 }
40 CurrentPrevayler.enterTransaction();
41 try {
42 if (logger.isDebugEnabled()) {
43 Object target = call.getTarget();
44 Object [] args = call.getArgs();
45 Method method = call.getMethod();
46 Subject subject = call.getSubject();
47
48 List argsList = Collections.EMPTY_LIST;
49 if (args != null) {
50 argsList = Arrays.asList(args);
51 }
52 logger.debug("invoking method " + method + " on " + target);
53 logger.debug("args " + argsList);
54 logger.debug("user " + subject);
55 }
56
57 Object result = call.invoke();
58 logger.debug("success!");
59 return result;
60 } catch (Exception e) {
61
62
63 if (e instanceof InvocationTargetException ) {
64 InvocationTargetException invocationTargetException = (InvocationTargetException ) e;
65 if (invocationTargetException.getCause() instanceof Exception ) {
66 e = (Exception ) e.getCause();
67 }
68 }
69 logger.error("Failed to execute command.", e);
70
71 throw e;
72 } finally {
73 CurrentPrevayler.exitTransaction();
74 CurrentPrevayler.setSystem(prev);
75 }
76 }
77
78 public Call getCall() {
79 return call;
80 }
81 }
82 |
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