Spring Integration : Dispatcher has no subscribers for channel - java

I am trying to build a spring integration application, which has the following configuration (the culprit seems to be the channel xsltSpecific) :
<beans:beans>
<channel id="channel1"></channel>
<channel id="channel2"></channel>
<channel id="xsltSpecific"></channel>
<channel id="xsltSpecificDelayed"></channel>
<channel id="xsltCommon"></channel>
<channel id="irdSpecificUnmarshallerChannel"></channel>
<channel id="irdSpecificInputChannel"></channel>
<file:outbound-channel-adapter
directory="${dml.ird.directory}" channel="channel1"
auto-create-directory="true" filename-generator="timestampedFileNameGenerator">
</file:outbound-channel-adapter>
<recipient-list-router input-channel="fileChannel">
<recipient channel="channel1" selector-expression="${dml.data.logs.enable}" />
<recipient channel="channel2" />
</recipient-list-router>
<recipient-list-router input-channel="channel2">
<recipient channel="xsltSpecificDelayed"></recipient>
<recipient channel="xsltCommon"></recipient>
</recipient-list-router>
<delayer id="specificDelayer" input-channel="xsltSpecificDelayed" default-delay="5000" output-channel="xsltSpecific"/>
<jms:message-driven-channel-adapter
id="jmsInboundAdapterIrd" destination="jmsInputQueue" channel="fileChannel"
acknowledge="transacted" transaction-manager="transactionManager"
error-channel="errorChannel" client-id="${ibm.jms.connection.factory.client.id}"
subscription-durable="true" durable-subscription-name="${ibm.jms.subscription.id1}" />
<si-xml:xslt-transformer input-channel="xsltCommon" output-channel="jmsInputChannel"
xsl-resource="classpath:summit-hub-to-cpm-mapping.xsl" result-transformer="resultTransformer" >
</si-xml:xslt-transformer>
<si-xml:xslt-transformer input-channel="xsltSpecific" output-channel="irdSpecificUnmarshallerChannel"
xsl-resource="classpath:summit-hub-specific.xsl" result-transformer="resultTransformer" >
</si-xml:xslt-transformer>
<si-xml:unmarshalling-transformer id="irdUnmarshaller"
unmarshaller="irdUnmarshallerDelegate" input-channel="irdSpecificUnmarshallerChannel"
output-channel="saveSpecificTradeChannel" />
<beans:bean id="irdUnmarshallerDelegate"
class="org.springframework.oxm.jaxb.Jaxb2Marshaller">
<beans:property name="schema"
value="summit-hub-specific.xsd" />
<beans:property name="contextPath"
value="com.h.i.c.d.i.mapping" />
</beans:bean>
<beans:bean id="resultTransformer" class="org.springframework.integration.xml.transformer.ResultToStringTransformer" />
<service-activator ref="specificTradeService" input-channel="saveSpecificTradeChannel"
requires-reply="false" method="save"/>
<file:inbound-channel-adapter directory="${dml.retry.directoryForIrd}"
channel="fileChannelAfterRetry" auto-create-directory="true"
prevent-duplicates="false" filename-regex=".*\.(msg|xml)" queue-size="50" >
<poller fixed-delay="${dml.retry.delay}" max-messages-per-poll="50">
<transactional transaction-manager="transactionManager" />
</poller>
</file:inbound-channel-adapter>
<channel id="fileChannel"/>
<channel id="fileChannelAfterRetry"/>
<file:file-to-string-transformer
input-channel="fileChannelAfterRetry" output-channel="fileChannel"
delete-files="true" />
<beans:import resource="classpath:cpm-dml-common-main.xml" />
</beans:beans>
But I am having the following exception :
org.springframework.messaging.MessageDeliveryException: Dispatcher has no subscribers for channel 'org.springframework.context.support.GenericApplicationContext#6950e31.xsltSpecific'.; nested exception is org.springframework.integration.MessageDispatchingException: Dispatcher has no subscribers
What does this exception mean ?
Also, I am not able to spot the problem, can you help me fix this issue ?
UPDATE
Sorry, I didn't give the whole context earlier, because I didn't think it was relevant.
The exception arises during a test derived from AbstractTransactionalJUnit4SpringContextTests, which closed the application context at the end of the test, before the message had a chance to get to the end.
I've added a Thread.sleep(10000) at the end of the test, and the exception doesn't happen anymore.

The xsltSpecific is just a default DirectChannel with a UnicastingDispatcher to deliver messages to channel's subscribers.
According your configuration you send a message to this channel from the:
<delayer id="specificDelayer" input-channel="xsltSpecificDelayed" default-delay="5000" output-channel="xsltSpecific"/>
And also it looks like you really have a subscriber to this channel:
<si-xml:xslt-transformer input-channel="xsltSpecific" output-channel="irdSpecificUnmarshallerChannel"
xsl-resource="classpath:summit-hub-specific.xsl" result-transformer="resultTransformer" >
</si-xml:xslt-transformer>
What is really not clear when this defined subscriber is lost. It doesn't look like you have an auto-startup="false" on this endpoint, but on the other hand maybe you really stop it at runtime...
Would you mind to share more stack trace on the matter? I want to see who is an original caller for that lost message.

Related

Spring integration with multiple executor channel not processing in parallel

I have requirement where i need to pass message to multiple channels asyc. To make my flow asyc i am using all executor channel. But for some reason flow is still sequential. i can seen diff thread as i configured in task executor but in sequence.
Here is the configuration I am using
<int:channel id="mainChannel">
<int:interceptors>
<int:wire-tap channel="channel1"/>
<int:wire-tap channel="channel2"/>
<int:wire-tap channel="channel3"/>
</int:interceptors>
</int:channel>
<int:channel id="channel1">
<int:dispatcher task-executor="exec1" />
</int:channel>
<int:channel id="channel2">
<int:dispatcher task-executor="exec2" />
</int:channel>
<int:channel id="channel3">
<int:dispatcher task-executor="exec3" />
</int:channel>
As per my understanding all this will be asyc (in my case 3 thread should run in parallel)
from log i can see all sequential but with diff thread name..
I am assuming preSend/Postsend should have been called in random order.
am i missing anything to make multiple executor channel in parallel.
I will really appreciate any help.
You might need to call the async implementation bean as shown:
<beans:bean id="asyncExecutor"
class="org.springframework.core.task.SimpleAsyncTaskExecutor"/>
<int:channel id="channel1">
<int:dispatcher task-executor="asyncExecutor" />
</int:channel>
<int:channel id="channel2">
<int:dispatcher task-executor="asyncExecutor" />
</int:channel>
<int:channel id="channel3">
<int:dispatcher task-executor="asyncExecutor" />
</int:channel>
Description of SimpleAsyncTaskExecutor:
public class SimpleAsyncTaskExecutor extends CustomizableThreadCreator
implements AsyncListenableTaskExecutor, Serializable
TaskExecutor implementation that fires up a new Thread for each task,
executing it asynchronously.
Supports limiting concurrent threads through the "concurrencyLimit"
bean property. By default, the number of concurrent threads is
unlimited.
NOTE: This implementation does not reuse threads! Consider a
thread-pooling TaskExecutor implementation instead, in particular for
executing a large number of short-lived tasks.
Example Of Usage from Github:
<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/integration"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:beans="http://www.springframework.org/schema/beans"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/integration
http://www.springframework.org/schema/integration/spring-integration.xsd">
<channel id="taskExecutorOnly">
<dispatcher task-executor="taskExecutor"/>
</channel>
<channel id="failoverFalse">
<dispatcher failover="false"/>
</channel>
<channel id="failoverTrue">
<dispatcher failover="true"/>
</channel>
<channel id="loadBalancerDisabled">
<dispatcher load-balancer="none"/>
</channel>
<channel id="loadBalancerDisabledAndTaskExecutor">
<dispatcher load-balancer="none" task-executor="taskExecutor"/>
</channel>
<channel id="roundRobinLoadBalancerAndTaskExecutor">
<dispatcher load-balancer="round-robin" task-executor="taskExecutor"/>
</channel>
<channel id="lbRefChannel">
<dispatcher load-balancer-ref="lb"/>
</channel>
<beans:bean id="taskExecutor"
class="org.springframework.core.task.SimpleAsyncTaskExecutor"/>
<beans:bean id="lb"
class="org.springframework.integration.channel.config.DispatchingChannelParserTests.SampleLoadBalancingStrategy"/>
</beans:beans>
from log i can see all sequential but with diff thread name
Because logs are just a single place where messages are printed and they really are printed by one writer even if from different thread. They are appear over there one by one. With a good load you would definitely see that messages are logged in an unexpected order.
I am assuming preSend/Postsend should have been called in random order.
That's not true. Interceptors are called in an order how they are added to the channel and if their order is the same, which is a case for you. It is already not an interceptor chain responsibility how those interceptors are implemented.
I think you just were not lucky to see logs in arbitrary order and probably just because consumers for those executor channels are plain loggers - no any loads to hold the thread and have an impression that work in other threads is done in parallel.

reply-timeout meaning in tcp-inbound-gateway in spring integration

Spring integration tcp gateway can be setup as follows:
<!-- Server side -->
<int-ip:tcp-connection-factory id="crLfServer"
type="server"
port="${availableServerSocket}"/>
<int-ip:tcp-inbound-gateway id="gatewayCrLf"
connection-factory="crLfServer"
request-channel="serverBytes2StringChannel"
error-channel="errorChannel"
reply-timeout="10000" />
<int:channel id="toSA" />
<int:service-activator input-channel="toSA"
ref="echoService"
method="test"/>
<bean id="echoService"
class="org.springframework.integration.samples.tcpclientserver.EchoService" />
<int:object-to-string-transformer id="serverBytes2String"
input-channel="serverBytes2StringChannel"
output-channel="toSA"/>
<int:transformer id="errorHandler"
input-channel="errorChannel"
expression="Error processing payload"/>
Notice the reply-timeout which is set as 10 seconds.
Does it mean that the TCP server will call the service and can wait for a maximum of 10 seconds? If the service does not reply within 10 seconds, Does the TCP server will send the message to errorChannel which in turn sends the client error message "Error processing payload"?
When I tested the TCP Server with a service that takes 20 seconds, client is taking 20 seconds to get the response. I am not seeing error message.
Can you please help in understanding the reply-timeout in TCP inbound-gateway?
Thanks
UPDATE:
Thanks for Artem to help out with this issue.
Best way to solve this problem is with the following config:
<beans>
<int-ip:tcp-connection-factory id="crLfServer" type="server" port="${availableServerSocket}"/>
<int-ip:tcp-inbound-gateway id="gatewayCrLf" connection-factory="crLfServer" request-channel="requestChannel" error-channel="errorChannel" reply-timeout="5000" />
<int:service-activator input-channel="requestChannel" ref="gateway" requires-reply="true"/>
<int:gateway id="gateway" default-request-channel="timeoutChannel" default-reply-timeout="5000" />
<int:object-to-string-transformer id="serverBytes2String" input-channel="timeoutChannel" output-channel="serviceChannel"/>
<int:channel id="timeoutChannel">
<int:dispatcher task-executor="executor"/>
</int:channel>
<bean id="executor" class="org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor">
<property name="corePoolSize" value="5" />
<property name="maxPoolSize" value="10" />
<property name="queueCapacity" value="25" />
</bean>
<int:service-activator input-channel="serviceChannel" ref="echoService" method="test"/>
<bean id="echoService" class="org.springframework.integration.samples.tcpclientserver.EchoService" />
<int:transformer id="errorHandler" input-channel="errorChannel" expression="payload.failedMessage.payload + ' errorHandleMsg: may be timeout error'"/>
</beans>
Thanks
Well, actually we should on that attribute a description like we have in other similar places, e.g. HTTP Inbound Gateway:
<xsd:attribute name="reply-timeout" type="xsd:string">
<xsd:annotation>
<xsd:documentation><![CDATA[
Used to set the receiveTimeout on the underlying MessagingTemplate instance
(org.springframework.integration.core.MessagingTemplate) for receiving messages
from the reply channel. If not specified this property will default to "1000"
(1 second).
]]></xsd:documentation>
</xsd:annotation>
</xsd:attribute>
That timeout means how much to wait for reply from downstream flow. But! That is possible if you flow is shifted to another thread somewhere. Otherwise everything is performed in the caller's Thread and therefore the wait time isn't deterministic.
Anyway we return null there after timeout without reply. And it is reflected in the TcpInboundGateway:
Message<?> reply = this.sendAndReceiveMessage(message);
if (reply == null) {
if (logger.isDebugEnabled()) {
logger.debug("null reply received for " + message + " nothing to send");
}
return false;
}
We can reconsider a logic in the TcpInboundGateway for :
if (reply == null && this.errorOnTimeout) {
if (object instanceof Message) {
error = new MessageTimeoutException((Message<?>) object, "No reply received within timeout");
}
else {
error = new MessageTimeoutException("No reply received within timeout");
}
}
But seems for me it really would be better on to rely on the timeout from the client.
UPDATE
I think we can overcome the limitation and meet you requirements with the midflow <gateway>:
<gateway id="gateway" default-request-channel="timeoutChannel" default-reply-timeout="10000"/>
<channel id="timeoutChannel">
<dispatcher task-executor="executor"/>
</channel>
<service-activator input-channel="requestChannel"
ref="gateway"
requires-reply="true"/>
So, the <service-activator> calls <gateway> and waits for reply from there. Requiring the last one, of course, to end up with the ReplyRequiredException, which you can convert into desired MessageTimeoutException in your error flow on the error-channel="errorChannel".
The timeoutChannel is an executor one, making our default-reply-timeout="10000" very useful because we shift a message on the gateway into separate thread immediately and move right from there into reply waiting process wrapped with that timeout on the CountDonwLatch.
Hope that is clear.

Configuring circuit breaker with service activator

Configuration details :
<int:publish-subscribe-channel id="toKafka"/>
<int:publish-subscribe-channel id="sendMessageToKafkaChannel"/>
<int:service-activator input-channel="toKafka" output-channel="sendMessageToKafkaChannel" order="1" ref="conditionalProducerService" method="producerCircuitBreaker">
<int:request-handler-advice-chain>
<ref bean="circuitBreakerAdvice" />
</int:request-handler-advice-chain>
</int:service-activator>
<int-kafka:outbound-channel-adapter id="kafkaOutboundChannelAdapter" kafka-producer-context-ref="producerContext"
auto-startup="true" channel="toKafka" message-key="kafka_messageKey"/>
<bean id="circuitBreakerAdvice" class="org.springframework.integration.handler.advice.RequestHandlerCircuitBreakerAdvice">
<property name="threshold" value="2"/>
<property name="halfOpenAfter" value="15000" />
</bean>
public Message<?> producerCircuitBreaker(Message<?> payload) {
throw new RuntimeException("foo Pro");
}
for(int i=0;i<4;i++){
toKafka.send(MessageBuilder
.withPayload(messageVO.getMessageContentVO())
.setHeader(KafkaHeaders.TOPIC, topic)
.setHeader(KafkaHeaders.PARTITION_ID,Integer.parseInt(messageVO.getPartition())).
build());
APPLOGGER.info("sending message");
}
Expecting to get the process to fail 2 times with exception and then "circuit breaker open" exception but it is simply stopping after throwing the below exception in the console.
Also how can we configure error-channel here.
https://gist.github.com/anonymous/67aae50e548c78470cd0
updated config:
<int:service-activator input-channel="toKafka" ref="gw">
<int:request-handler-advice-chain> <ref bean="circuitBreakerAdvice"/>
</int:request-handler-advice-chain>
</int:service-activator>
<int:channel id="failedChannel1" />
<int:gateway id="gw" default-request-channel="toKafka" default-reply-timeout="0" error-channel="failedChannel1" />
<int:chain input-channel="failedChannel1">
<int:transformer expression="'failed:'+payload.failedMessage.payload+ ' with a' +payload.cause.message" />
<int-stream:stderr-channel-adapter append-newline="true"/>
</int:chain>
getting below exception.
failed:TestVo[data=sample message]] with Cannot process message.
https://gist.github.com/anonymous/921be7691c41d125dc84
however it is working with same message otherwise.(message content changed intentionally)
Also tried putting invalid value for the producer context: eg. broker- list/value-class-type as invalid class type than expected as below.
getting below error but expecting to get CB to come into picture and message should flow to the error channel.
in case of value-class-type : CB not invoked however message flowing to the error channel but there are many message are coming for 1 message published.
failed:TestVo [data={tes message}}] with No converter found capable of converting from type xx.xxx.vo.TestVo to type java.lang.String
these is occuring in the console many times.
in case of broker-list : it is simply throwing exception in the console.
https://gist.github.com/anonymous/6ece517fb5e82ac73492
Expected : CB to get invoked and message flow to the error channel in all cases.
<int-kafka:outbound-channel-adapter id="kafkaOutboundChannelAdapter" kafka-producer-context-ref="producerContext"
auto-startup="true" channel="toKafka" message-key="kafka_messageKey"/>
<int-kafka:producer-context id="producerContext" producer-properties="producerProperties">
<int-kafka:producer-configurations>
<int-kafka:producer-configuration
broker-list="1.2.3:9092" topic="headers['topic']" key-class-type="java.lang.String"
value-class-type="java.lang.String"
value-encoder="kafkaEncoder" key-encoder="kafkaKeyEncoder"
compression-type="none" />
</int-kafka:producer-configurations>
</int-kafka:producer-context>
With that code, you need try {...} around the send().
The first two attempts will catch your RuntimeException; the next will catch the circuit breaker exception.
Use a Messaging Gateway with an error channel instead of sending to the channel directly.
EDIT
This code...
<int:service-activator input-channel="toKafka" ref="gw">
<int:request-handler-advice-chain> <ref bean="circuitBreakerAdvice"/>
</int:request-handler-advice-chain>
</int:service-activator>
<int:gateway id="gw" default-request-channel="toKafka" default-reply-timeout="0" error-channel="failedChannel1" />
When you send a message to toKafka, the gateway will be invoked which will send the message to toKafka in a loop.
It will cause a stack overflow.

how to set basicQos in spring amqp for fair dispatch?

This is my current spring amqp configuration
<rabbit:connection-factory id="rabbitConnectionFactory"
port="${rabbitmq.port}" host="${rabbitmq.host}" username="${rabbitmq.username}" password="${rabbitmq.password}"/>
<rabbit:admin id="rabbitmqAdmin" connection-factory="rabbitConnectionFactory" />
<rabbit:template id="importAmqpTemplate"
connection-factory="rabbitConnectionFactory">
</rabbit:template>
and this is my exchanges, queues, listeners, replyQueues, replyHandlers configuration
<rabbit:queue name="${process1.queue}" />
<rabbit:queue name="${process1.reply.queue}" />
<rabbit:queue name="${process2.queue}" />
<rabbit:queue name="${process2.reply.queue}" />
<rabbit:direct-exchange name="${myExchange}">
<rabbit:bindings>
<rabbit:binding queue="${process1.queue}"
key="${process1.routing.key}" />
<rabbit:binding queue="${process2.queue}"
key="${process2.routing.key}" />
</rabbit:bindings>
</rabbit:direct-exchange>
<rabbit:listener-container
connection-factory="rabbitConnectionFactory" concurrency="${my.listener.concurrency}"
requeue-rejected="false">
<rabbit:listener queues="${process1.queue}"
ref="foundation" method="process1" />
<rabbit:listener queues="${process2.queue}"
ref="foundation" method="process2s" />
</rabbit:listener-container>
<beans:beans profile="master">
<beans:bean id="process1Lbq" class="java.util.concurrent.LinkedBlockingQueue" />
<beans:bean id="process2Lbq" class="java.util.concurrent.LinkedBlockingQueue" />
<beans:bean id="process1sReplyHandler"
class="com.stockopedia.batch.foundation.ReplyHandler"
p:blockingQueue-ref="process1Lbq" />
<beans:bean id="process2ReplyHandler"
class="com.stockopedia.batch.foundation.ReplyHandler"
p:blockingQueue-ref="process2Lbq" />
<rabbit:listener-container
connection-factory="rabbitConnectionFactory" concurrency="1"
requeue-rejected="false">
<rabbit:listener queues="${process1.reply.queue}"
ref="process1sHandler" method="onMessage" />
<rabbit:listener queues="${process2.reply.queue}"
ref="process2ReplyHandler" method="onMessage" />
</rabbit:listener-container>
</beans:beans>
I have set this up on 6 different servers, and queuing up messages from master servers only. Other servers are only processing messages. All servers has same number of listeners running as set by concurrency.
The problem is, messages takes different time to process. Some messages take long time. So currently some of the servers do not pick up messages from queues even all listeners on those servers are done with processing there messages.
I can see the pending messages in queue to be processed and some servers just sitting idle. I want those server to pick up remaining messages while other servers are busy in processing their messages.
Do I need to set basic_Quos as mentioned in tutorial http://www.rabbitmq.com/tutorials/tutorial-two-java.html (Fair Dispatch) ?
int prefetchCount = 1;
channel.basicQos(prefetchCount);
or is it default for spring ampq ? If not how do i do it ?
basicQos(1) is the default setting for the listener container; it can be changed by setting prefetch on the container.
I can see the pending messages in queue to be processed and some servers just sitting idle.
You shouldn't see messages just sitting in the queue if you have idle consumers. If messages are marked as un-acked, they are being processed.
If you turn on DEBUG level logging, you will be able to see idle consumers polling an internal queue for new deliveries.

TCP Spring Integration - Dispatcher has no subscribers for 'response' channel

I am using spring integration to make TCP call to server by providing some message and getting response back. I prefer to use channel adapter to send and receive bulk messages. The problem I am facing is with the response channel. Getting "Dispatcher has no subscribers for channel " for response channel.
Everything is working fine except the response not getting transported on response channel. I can see the handshaking at server and the response in the log being put on the response and logger channels. But after that exception is thrown. Configuration setup is:
<gateway id="clientPositionsGateway" service-interface="MyGatewayInterface">
<method name="fetchClientPositions" request-channel="clientPositionsRequestChannel" />
</gateway>
<channel id="clientPositionsRequestChannel" />
<splitter input-channel="clientPositionsRequestChannel"
output-channel="singleClientPositionsRequestChannel" />
<channel id = "singleClientPositionsRequestChannel" />
<transformer
input-channel="singleClientPositionsRequestChannel"
output-channel="dmQueryRequestChannel"
ref="dmPosBaseQueryTransformer" />
<channel id = "dmQueryRequestChannel">
<!-- <dispatcher task-executor="executor"/> -->
</channel>
<ip:tcp-connection-factory id="csClient"
type="client"
host="somehost"
port="12345"
single-use="true"
deserializer="connectionSerializeDeserialize"
/>
<ip:tcp-outbound-channel-adapter id="dmServerOutboundAdapter"
channel="dmQueryRequestChannel"
connection-factory="csClient"
order="2"
/>
<ip:tcp-inbound-channel-adapter id="dmServerInboundAdapter"
channel="dmQueryResponseChannel"
connection-factory="csClient"
error-channel="errorChannel"/>
<channel id="dmQueryResponseChannel"/>
As Artem said in his comment, 'Dispatcher has no subscribers' means here that there is no endpoint configured to receive the response on dmQueryResponseChannel, or the endpoint configured with that channel as its input channel is not started.
In any case, even when you resolve that, using independent adapters for request/response scenarios is tricky because the framework has no way to automatically correlated the response to the request. That's what the outbound gateway is for. You can use collaborating adapters, but you have to deal with the correlation yourself. If you are using a request/reply gateway to initiate the flow, you will have to use a technique such as the one explored in the tcp-client-server-multiplex sample. This is because using independent adapters means you'll lose the replyChannel header used to get the response back to the gateway.
Or, you can use a void returning gateway to send the request, and an <int:outbound-channel-adapter/> so the framework will call back with the response and you can do your own correlation programmatically.
If your clientPositionsGateway is invoked from client threads, there is no reason to use executor channels. If you do million loop clientPositionsGateway try to use Future gateway: http://docs.spring.io/spring-integration/docs/2.2.5.RELEASE/reference/html/messaging-endpoints-chapter.html#async-gateway and again: without executor channels. And I don't see reason to use reply-channel on both gateways.
And one more: you have <splitter> before <tcp:outbound-gateway>, but where is an <aggregator> after <tcp:outbound-gateway>?..
In your current case you get reply from your clientPositionsGateway, all others will be dropped, because TemporaryReplyChannel will be already closed.
public interface ClientPositionsGateway {
String fetchClientPositions(List<String> clientList);
}
Here is a code that solved my Problem :
#ContextConfiguration(locations={"/clientGIM2Position.xml"})
#RunWith(SpringJUnit4ClassRunner.class)
public class GetClientPositionsTest {
#Autowired
ClientPositionsGateway clientPositionsGateway;
#Test
public void testGetPositions() throws Exception {
String positions = clientPositionsGateway.fetchClientPositions(clientList);
System.out.println("returned !!!!" + positions);
}
}
<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns:beans="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://www.springframework.org/schema/integration"
xmlns:ip="http://www.springframework.org/schema/integration/ip"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:task="http://www.springframework.org/schema/task"
xsi:schemaLocation="http://www.springframework.org/schema/integration/ip http://www.springframework.org/schema/integration/ip/spring-integration-ip.xsd
http://www.springframework.org/schema/integration http://www.springframework.org/schema/integration/spring-integration.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task.xsd">
<!-- intercept and log every message -->
<logging-channel-adapter id="logger" level="DEBUG" />
<wire-tap channel = "logger" />
<gateway id="clientPositionsGateway"
service-interface="com.example.ClientPositionsGateway">
<method name="fetchClientPositions" request-channel="clientPositionsRequestChannel" reply-channel="dmQueryResponseChannel"/>
</gateway>
<channel id="clientPositionsRequestChannel" />
<splitter input-channel="clientPositionsRequestChannel"
output-channel="singleClientPositionsRequestChannel" />
<channel id = "singleClientPositionsRequestChannel" />
<transformer
input-channel="singleClientPositionsRequestChannel"
output-channel="dmQueryRequestChannel"
ref="dmPosBaseTransQueryTransformer" />
<channel id = "dmQueryRequestChannel">
<dispatcher task-executor="executor"/>
</channel>
<ip:tcp-connection-factory id="csClient"
type="client"
host="hostserver"
port="22010"
single-use="true"
deserializer="connectionSerializeDeserialize"
/>
<ip:tcp-outbound-gateway id="dmServerGateway"
request-channel="dmQueryRequestChannel"
reply-channel="dmQueryResponseChannel"
connection-factory="csClient" />
<channel id="dmQueryResponseChannel">
<dispatcher task-executor="executor"/>
</channel>
<channel id="serverBytes2StringChannel" />
<bean id="connectionSerializeDeserialize" class="com.example.DMQueryResponseSerializer"/>
<bean id="dmPosBaseTransQueryTransformer" class="com.example.DMPOSBaseTransQueryTransformer"/>
<task:executor id="executor" pool-size="5"/>
</beans:beans>
Configuration settings:
<gateway id="clientPositionsGateway" service-interface="com.example.ClientPositionsGateway">
<method name="fetchClientPositions" request-channel="clientPositionsRequestChannel" reply-channel="dmQueryResponseChannel"/>
</gateway>
<channel id="clientPositionsRequestChannel" />
<splitter input-channel="clientPositionsRequestChannel"
output-channel="singleClientPositionsRequestChannel" />
<channel id = "singleClientPositionsRequestChannel" />
<transformer
input-channel="singleClientPositionsRequestChannel"
output-channel="dmQueryRequestChannel"
ref="dmPosBaseQueryTransformer" />
<logging-channel-adapter channel="clientBytes2StringChannel"/>
<channel id = "dmQueryRequestChannel">
<dispatcher task-executor="executor"/>
</channel>
<ip:tcp-connection-factory id="csClient"
type="client"
host="serverHost"
port="22010"
single-use="true"
deserializer="connectionSerializeDeserialize"
/>
<ip:tcp-outbound-channel-adapter id="dmServerOutboundAdapter"
channel="dmQueryRequestChannel"
connection-factory="csClient"
/>
<ip:tcp-inbound-channel-adapter id="dmServerInboundAdapter"
channel="dmQueryResponseChannel"
connection-factory="csClient"
error-channel="errorChannel"/>
<transformer input-channel="dmQueryResponseChannel" output-channel="clientBytes2StringChannel" ref="dmPOSBaseQueryResponseTransformer"
/>
<channel id="dmQueryResponseChannel"/>
<channel id="clientBytes2StringChannel"/>

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