1 | |
|
2 | |
|
3 | |
|
4 | |
|
5 | |
|
6 | |
|
7 | |
package org.mule.transport.polling; |
8 | |
|
9 | |
import org.mule.DefaultMuleEvent; |
10 | |
import org.mule.DefaultMuleMessage; |
11 | |
import org.mule.api.MuleEvent; |
12 | |
import org.mule.api.MuleMessage; |
13 | |
import org.mule.api.construct.FlowConstruct; |
14 | |
import org.mule.api.endpoint.ImmutableEndpoint; |
15 | |
import org.mule.api.endpoint.InboundEndpoint; |
16 | |
import org.mule.api.endpoint.OutboundEndpoint; |
17 | |
import org.mule.api.lifecycle.CreateException; |
18 | |
import org.mule.api.lifecycle.InitialisationException; |
19 | |
import org.mule.api.processor.MessageProcessor; |
20 | |
import org.mule.api.transport.Connector; |
21 | |
import org.mule.config.i18n.CoreMessages; |
22 | |
import org.mule.session.DefaultMuleSession; |
23 | |
import org.mule.transport.AbstractConnector; |
24 | |
import org.mule.transport.AbstractPollingMessageReceiver; |
25 | |
import org.mule.transport.NullPayload; |
26 | |
import org.mule.util.StringUtils; |
27 | |
|
28 | |
import java.util.Map; |
29 | |
|
30 | |
public class MessageProcessorPollingMessageReceiver extends AbstractPollingMessageReceiver |
31 | |
{ |
32 | |
public static final String SOURCE_MESSAGE_PROCESSOR_PROPERTY_NAME = "sourceMessageProcessor"; |
33 | |
|
34 | |
protected MessageProcessor sourceMessageProcessor; |
35 | |
|
36 | |
public MessageProcessorPollingMessageReceiver(Connector connector, |
37 | |
FlowConstruct flowConstruct, |
38 | |
InboundEndpoint endpoint) throws CreateException |
39 | |
{ |
40 | 0 | super(connector, flowConstruct, endpoint); |
41 | 0 | } |
42 | |
|
43 | |
@Override |
44 | |
protected void doInitialise() throws InitialisationException |
45 | |
{ |
46 | 0 | super.doInitialise(); |
47 | |
|
48 | 0 | sourceMessageProcessor = (MessageProcessor) endpoint.getProperty(SOURCE_MESSAGE_PROCESSOR_PROPERTY_NAME); |
49 | |
|
50 | 0 | if (sourceMessageProcessor instanceof OutboundEndpoint |
51 | |
&& !((OutboundEndpoint) sourceMessageProcessor).getExchangePattern().hasResponse()) |
52 | |
{ |
53 | |
|
54 | 0 | throw new InitialisationException(CoreMessages.createStaticMessage(String.format( |
55 | |
"The endpoint %s does not return responses and therefore can't be used for polling.", |
56 | |
sourceMessageProcessor)), this); |
57 | |
} |
58 | |
|
59 | 0 | Long tempPolling = (Long) endpoint.getProperties().get(AbstractConnector.PROPERTY_POLLING_FREQUENCY); |
60 | 0 | if (tempPolling != null) |
61 | |
{ |
62 | 0 | setFrequency(tempPolling); |
63 | |
} |
64 | 0 | } |
65 | |
|
66 | |
@Override |
67 | |
public void poll() throws Exception |
68 | |
{ |
69 | 0 | MuleMessage request = new DefaultMuleMessage(StringUtils.EMPTY, (Map<String, Object>) null, |
70 | |
connector.getMuleContext()); |
71 | 0 | ImmutableEndpoint ep = endpoint; |
72 | 0 | if (sourceMessageProcessor instanceof ImmutableEndpoint) |
73 | |
{ |
74 | 0 | ep = (ImmutableEndpoint) sourceMessageProcessor; |
75 | |
} |
76 | |
|
77 | 0 | MuleEvent event = new DefaultMuleEvent(request, ep, new DefaultMuleSession(flowConstruct, |
78 | |
connector.getMuleContext())); |
79 | |
|
80 | 0 | MuleEvent sourceEvent = sourceMessageProcessor.process(event); |
81 | 0 | if (isNewMessage(sourceEvent)) |
82 | |
{ |
83 | 0 | routeMessage(sourceEvent.getMessage()); |
84 | |
} |
85 | |
else |
86 | |
{ |
87 | |
|
88 | 0 | logger.info(String.format("Polling of '%s' returned null, the flow will not be invoked.", |
89 | |
sourceMessageProcessor)); |
90 | |
} |
91 | 0 | } |
92 | |
|
93 | |
|
94 | |
|
95 | |
protected boolean isNewMessage(MuleEvent sourceEvent) |
96 | |
{ |
97 | 0 | if (sourceEvent != null && sourceEvent.getMessage() != null) |
98 | |
{ |
99 | 0 | MuleMessage message = sourceEvent.getMessage(); |
100 | 0 | if (message.getPayload().equals(NullPayload.getInstance())) |
101 | |
{ |
102 | 0 | return false; |
103 | |
} |
104 | |
else |
105 | |
{ |
106 | 0 | return true; |
107 | |
} |
108 | |
} |
109 | 0 | return false; |
110 | |
} |
111 | |
} |