XML to java DSL for spring integration including UDP channel adapter - spring

Question

I would like to convert my XML config to Java dsl, but I can not find an example for int-ip:udp-inbound-channel-adapter in java dsl. There is TcpNetServerConnectionFactory for TCP but nothing for UDP. Only that class is subclassing AbstractServerConnectionFactory. XML config related to spring integration is bellow.
<int-ip:udp-inbound-channel-adapter
id="receiverChannel" channel="udpReceivedChannel" port="1206" multicast="false"
check-length="false" lookup-host="false" pool-size="20"/>
<int:transformer id="convertTransformer" input-channel="convertChannel"
output-channel="toProcessChannel" ref="transformer" method="transform">
</int:transformer>
<int:service-activator id="accumulateActivator" input-channel="udpReceivedChannel"
output-channel="convertChannel"
ref="accumulator" method="accumulate">
</int:service-activator>
<int:service-activator id="cssenderAcivator" input-channel="sendToCMSChannel"
ref="cssender" method="sendToCS">
</int:service-activator>
<int:service-activator id="jackpotRaiseActivator" input-channel="toProcessChannel"
ref="jackpotraise" method="raise" >
</int:service-activator>
<int:service-activator id="jackpotScreenActivator" input-channel="jackpotScreenChannel"
ref="jackpotscreen" method="updateJackpotsOnDisplay" >
</int:service-activator>
<int:channel id="udpReceivedChannel">
<int:dispatcher task-executor="accumulateExecutor"/>
<!--<int:queue message-store="redisMessageStore"/>--> <!-- ovo nam ne treba bez da nesto externo trpa u redis-->
</int:channel>
<int:channel id="toProcessChannel">
<int:dispatcher task-executor="jackpotRaiseExecutor"/>
<int:interceptors>
<int:wire-tap channel="sendToCMSChannel"/>
</int:interceptors>
</int:channel>
<int:channel id="convertChannel">
<int:dispatcher task-executor="transformerExecutor"/>
</int:channel>
<int:channel id="sendToCMS">
<int:dispatcher task-executor="cmsSenderExecutor"/>
</int:channel>
<int:channel id="jackpotScreenChannel">
<int:dispatcher task-executor="jackpotScreenExecutor"/>
</int:channel>
<task:executor id="accumulateExecutor" pool-size="20" keep-alive="120" />
<task:executor id="jackpotRaiseExecutor" pool-size="20" keep-alive="120" />
<task:executor id="transformerExecutor" pool-size="20" keep-alive="120" />
<task:executor id="cmsSenderExecutor" pool-size="20" keep-alive="120" />
<task:executor id="jackpotScreenExecutor" pool-size="400" keep-alive="500" />

Answer 1

Here's a quick boot app that creates an adapter and sends a packet to it...
#SpringBootApplication
public class So40286815Application {
public static void main(String[] args) throws Exception {
ConfigurableApplicationContext context = SpringApplication.run(So40286815Application.class, args);
DatagramSocket socket = new DatagramSocket();
DatagramPacket packet = new DatagramPacket("foo".getBytes(), 3);
packet.setAddress(InetAddress.getLocalHost());
packet.setPort(1206);
socket.send(packet);
Thread.sleep(10000);
socket.close();
context.close();
}
#Bean
public UnicastReceivingChannelAdapter inbound() {
UnicastReceivingChannelAdapter adapter = new UnicastReceivingChannelAdapter(1206);
adapter.setOutputChannelName("foo");
return adapter;
}
#ServiceActivator(inputChannel = "foo")
public void handle(byte[] bytes) {
System.out.println(new String(bytes));
}
}
and with the DSL...
#Bean
public UnicastReceivingChannelAdapter inbound() {
return new UnicastReceivingChannelAdapter(1206);
}
#Bean
public IntegrationFlow flow() {
return IntegrationFlows.from(inbound())
.handle(System.out::println)
.get();
}
or, simply...
#Bean
public IntegrationFlow flow() {
return IntegrationFlows.from(new UnicastReceivingChannelAdapter(1206))
.transform(new ObjectToStringTransformer())
.handle(m -> System.out.println(m.getPayload()))
.get();
}