1 | |
|
2 | |
|
3 | |
|
4 | |
|
5 | |
|
6 | |
|
7 | |
package org.mule.processor; |
8 | |
|
9 | |
import org.mule.api.MuleContext; |
10 | |
import org.mule.api.MuleEvent; |
11 | |
import org.mule.api.MuleException; |
12 | |
import org.mule.api.construct.FlowConstruct; |
13 | |
import org.mule.api.context.MuleContextAware; |
14 | |
import org.mule.api.context.notification.ServerNotificationHandler; |
15 | |
import org.mule.api.processor.InterceptingMessageProcessor; |
16 | |
import org.mule.api.processor.MessageProcessor; |
17 | |
import org.mule.api.processor.MessageProcessorChain; |
18 | |
import org.mule.context.notification.MessageProcessorNotification; |
19 | |
import org.mule.processor.chain.DefaultMessageProcessorChain; |
20 | |
import org.mule.util.ObjectUtils; |
21 | |
|
22 | |
import org.apache.commons.logging.Log; |
23 | |
import org.apache.commons.logging.LogFactory; |
24 | |
|
25 | |
|
26 | |
|
27 | |
|
28 | |
|
29 | |
|
30 | 0 | public abstract class AbstractInterceptingMessageProcessor |
31 | |
implements InterceptingMessageProcessor, MuleContextAware |
32 | |
{ |
33 | 0 | protected Log logger = LogFactory.getLog(getClass()); |
34 | |
|
35 | |
protected ServerNotificationHandler notificationHandler; |
36 | |
|
37 | |
protected MuleContext muleContext; |
38 | |
|
39 | |
public void setMuleContext(MuleContext context) |
40 | |
{ |
41 | 0 | this.muleContext = context; |
42 | 0 | notificationHandler = muleContext.getNotificationManager(); |
43 | 0 | if (next instanceof DefaultMessageProcessorChain) |
44 | |
{ |
45 | 0 | ((DefaultMessageProcessorChain) next).setMuleContext(context); |
46 | |
} |
47 | 0 | } |
48 | |
|
49 | |
public void setListener(MessageProcessor next) |
50 | |
{ |
51 | 0 | this.next = next; |
52 | 0 | } |
53 | |
|
54 | |
protected MessageProcessor next; |
55 | |
|
56 | |
protected MuleEvent processNext(MuleEvent event) throws MuleException |
57 | |
{ |
58 | 0 | if (next == null) |
59 | |
{ |
60 | 0 | return event; |
61 | |
} |
62 | 0 | else if (event == null) |
63 | |
{ |
64 | 0 | if (logger.isDebugEnabled()) |
65 | |
{ |
66 | 0 | logger.trace("MuleEvent is null. Next MessageProcessor '" + next.getClass().getName() |
67 | |
+ "' will not be invoked."); |
68 | |
} |
69 | 0 | return null; |
70 | |
} |
71 | |
else |
72 | |
{ |
73 | 0 | if (logger.isTraceEnabled()) |
74 | |
{ |
75 | 0 | logger.trace("Invoking next MessageProcessor: '" + next.getClass().getName() + "' "); |
76 | |
} |
77 | |
|
78 | 0 | boolean fireNotification = !(next instanceof MessageProcessorChain); |
79 | |
|
80 | 0 | if (fireNotification) |
81 | |
{ |
82 | |
|
83 | 0 | fireNotification(event.getFlowConstruct(), event, next, |
84 | |
MessageProcessorNotification.MESSAGE_PROCESSOR_PRE_INVOKE); |
85 | |
} |
86 | 0 | final MuleEvent result = next.process(event); |
87 | 0 | if (fireNotification) |
88 | |
{ |
89 | 0 | fireNotification(event.getFlowConstruct(), result, next, |
90 | |
MessageProcessorNotification.MESSAGE_PROCESSOR_POST_INVOKE); |
91 | |
} |
92 | 0 | return result; |
93 | |
} |
94 | |
} |
95 | |
|
96 | |
public MuleContext getMuleContext() |
97 | |
{ |
98 | 0 | return muleContext; |
99 | |
} |
100 | |
|
101 | |
@Override |
102 | |
public String toString() |
103 | |
{ |
104 | 0 | return ObjectUtils.toString(this); |
105 | |
} |
106 | |
|
107 | |
protected void fireNotification(FlowConstruct flowConstruct, MuleEvent event, MessageProcessor processor, int action) |
108 | |
{ |
109 | 0 | if (notificationHandler != null |
110 | |
&& notificationHandler.isNotificationEnabled(MessageProcessorNotification.class)) |
111 | |
{ |
112 | 0 | notificationHandler.fireNotification(new MessageProcessorNotification(flowConstruct, event, processor, action)); |
113 | |
} |
114 | 0 | } |
115 | |
|
116 | |
} |