My aim is to read the csv file, convert it to Java Objects (POJO) and send the Java Objects one by one to ActiveMQ queue. Below is the code:
public void configure() throws Exception {
from("file:src/main/resources?fileName=data.csv")
.unmarshal(bindy)
.split(body())
.to("file:src/main/resources/?fileName=equityfeeds.txt")
.split().tokenize(",").streaming().to("jms:queue:javaobjects.upstream.queue");
}
Issues: 1.When I execute the code no file(equityfeeds.txt) gets created and no objects goes to the queue. What's wrong? I don't need to do any processing right now. I just need to unmarshal the csv to POJOs and send the Java Objects one by one to the ActiveMQ queue.
EquityFeeds (POJO)
@CsvRecord(separator = ",",skipFirstLine = true)
public class EquityFeeds {
@DataField(pos = 1)
private String externalTransactionId;
@DataField(pos = 2)
private String clientId;
@DataField(pos = 3)
private String securityId;
@DataField(pos = 4)
private String transactionType;
@DataField(pos = 5, pattern = "dd/MM/YY")
private Date transactionDate;
@DataField(pos = 6)
private float marketValue;
@DataField(pos = 7)
private String priorityFlag;
Please kindly help. Please tell me where I am going wrong.
@pvpkiran:Below is my Camel Code for producer:
public void configure() throws Exception {
from("file:src/main/resources?fileName=data.csv")
.unmarshal(bindy)
.split(body())
.streaming().to("jms:queue:javaobjects.upstream.queue");
}
Below is my Consumer Code (Using JMS API):
@JmsListener(destination = "javaobjects.upstream.queue")
public void javaObjectsListener(final Message objectMessage) throws JMSException {
Object messageData = null;
if(objectMessage instanceof ObjectMessage) {
ObjectMessage objMessage = (ObjectMessage) objectMessage;
messageData = objMessage.getObject();
}
System.out.println("Object: "+messageData.toString());
}
I am not using Camel for consuming the JMSMessage. In the consumer I am using JMS API for consuming the message. Also I am not testing the code. The messages have come in ActiveMQ and I am using JMS API (as above) to consume the message. In the terminal in am getting NullPointerException. Also 2 message have gone into ActiveMQ.DLQ giving the below Error Message:
java.lang.Throwable: Delivery[7] exceeds redelivery policy limit:RedeliveryPolicy {destination = null, collisionAvoidanceFactor = 0.15, maximumRedeliveries = 6, maximumRedeliveryDelay = -1, initialRedeliveryDelay = 1000, useCollisionAvoidance = false, useExponentialBackOff = false, backOffMultiplier = 5.0, redeliveryDelay = 1000, preDispatchCheck = true}, cause:null
Try this. This should work
from("file:src/main/resources?fileName=equityfeeds.csv")
.unmarshal(new BindyCsvDataFormat(EquityFeeds.class))
.split(body())
.streaming().to("jms:queue:javaobjects.upstream.queue");
// This route is for Testing
from("jms:queue:javaobjects.upstream.queue").to("bean:camelBeanComponent?method=processRoute");
And write a consumer component bean
@Component
public class CamelBeanComponent {
public void processRoute(Exchange exchange) {
System.out.println(exchange.getIn().getBody());
}
}
This printed(You need to add toString()
if you need output like this)
EquityFeeds(externalTransactionId=SAPEXTXN1, clientId=GS, securityId=ICICI, transactionType=BUY, transactionDate=Sun Dec 30 00:00:00 CET 2012, marketValue=101.9, priorityFlag=Y)
EquityFeeds(externalTransactionId=SAPEXTXN2, clientId=AS, securityId=REL, transactionType=SELL, transactionDate=Sun Dec 30 00:00:00 CET 2012, marketValue=121.9, priorityFlag=N)
If you use .split().tokenize(",")
then, each field in each line(not complete line) is converted to EquityFeeds object (with other fields as null) is sent as a message to the queue
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