from("direct:start")
// split by new line and group by 3, and skip the very first element
.split().tokenize("\n", 3, true).streaming()
.to("mock:group");
from("direct:start")
// split by new line and group by 3, and skip the very first element
.split().tokenize("\n", 3, true).streaming()
.to("mock:group");
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from("direct:body")
// here we use a POJO bean mySplitterBean to do the split of the payload
.split()
.method("mySplitterBean", "splitBody")
.to("mock:result");
from("direct:message")
// here we use a POJO bean mySplitterBean to do the split of the message
// with a certain header value
.split()
.method("mySplitterBean", "splitMessage")
.to("mock:result");
from("direct:body")
// here we use a POJO bean mySplitterBean to do the split of the payload
.split()
.method("mySplitterBean", "splitBody")
.to("mock:result");
from("direct:message")
// here we use a POJO bean mySplitterBean to do the split of the message
// with a certain header value
.split()
.method("mySplitterBean", "splitMessage")
.to("mock:result");
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public class MySplitterBean {
/**
* The split body method returns something that is iteratable such as a java.util.List.
*
* @param body the payload of the incoming message
* @return a list containing each part split
*/
public List<String> splitBody(String body) {
// since this is based on an unit test you can of couse
// use different logic for splitting as {router} have out
// of the box support for splitting a String based on comma
// but this is for show and tell, since this is java code
// you have the full power how you like to split your messages
List<String> answer = new ArrayList<String>();
String[] parts = body.split(",");
for (String part : parts) {
answer.add(part);
}
return answer;
}
/**
* The split message method returns something that is iteratable such as a java.util.List.
*
* @param header the header of the incoming message with the name user
* @param body the payload of the incoming message
* @return a list containing each part split
*/
public List<Message> splitMessage(@Header(value = "user") String header, @Body String body) {
// we can leverage the Parameter Binding Annotations
// http://camel.apache.org/parameter-binding-annotations.html
// to access the message header and body at same time,
// then create the message that we want, splitter will
// take care rest of them.
// *NOTE* this feature requires {router} version >= 1.6.1
List<Message> answer = new ArrayList<Message>();
String[] parts = header.split(",");
for (String part : parts) {
DefaultMessage message = new DefaultMessage();
message.setHeader("user", part);
message.setBody(body);
answer.add(message);
}
return answer;
}
}
public class MySplitterBean {
/**
* The split body method returns something that is iteratable such as a java.util.List.
*
* @param body the payload of the incoming message
* @return a list containing each part split
*/
public List<String> splitBody(String body) {
// since this is based on an unit test you can of couse
// use different logic for splitting as {router} have out
// of the box support for splitting a String based on comma
// but this is for show and tell, since this is java code
// you have the full power how you like to split your messages
List<String> answer = new ArrayList<String>();
String[] parts = body.split(",");
for (String part : parts) {
answer.add(part);
}
return answer;
}
/**
* The split message method returns something that is iteratable such as a java.util.List.
*
* @param header the header of the incoming message with the name user
* @param body the payload of the incoming message
* @return a list containing each part split
*/
public List<Message> splitMessage(@Header(value = "user") String header, @Body String body) {
// we can leverage the Parameter Binding Annotations
// http://camel.apache.org/parameter-binding-annotations.html
// to access the message header and body at same time,
// then create the message that we want, splitter will
// take care rest of them.
// *NOTE* this feature requires {router} version >= 1.6.1
List<Message> answer = new ArrayList<Message>();
String[] parts = header.split(",");
for (String part : parts) {
DefaultMessage message = new DefaultMessage();
message.setHeader("user", part);
message.setBody(body);
answer.add(message);
}
return answer;
}
}
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BeanIOSplitter splitter = new BeanIOSplitter();
splitter.setMapping("org/apache/camel/dataformat/beanio/mappings.xml");
splitter.setStreamName("employeeFile");
// Following is a route that uses the beanio data format to format CSV data
// in Java objects:
from("direct:unmarshal")
// Here the message body is split to obtain a message for each row:
.split(splitter).streaming()
.to("log:line")
.to("mock:beanio-unmarshal");
BeanIOSplitter splitter = new BeanIOSplitter();
splitter.setMapping("org/apache/camel/dataformat/beanio/mappings.xml");
splitter.setStreamName("employeeFile");
// Following is a route that uses the beanio data format to format CSV data
// in Java objects:
from("direct:unmarshal")
// Here the message body is split to obtain a message for each row:
.split(splitter).streaming()
.to("log:line")
.to("mock:beanio-unmarshal");
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from("direct:start")
.split(body().tokenize("@"), new MyOrderStrategy())
// each split message is then send to this bean where we can process it
.to("bean:MyOrderService?method=handleOrder")
// this is important to end the splitter route as we do not want to do more routing
// on each split message
.end()
// after we have split and handled each message we want to send a single combined
// response back to the original caller, so we let this bean build it for us
// this bean will receive the result of the aggregate strategy: MyOrderStrategy
.to("bean:MyOrderService?method=buildCombinedResponse")
from("direct:start")
.split(body().tokenize("@"), new MyOrderStrategy())
// each split message is then send to this bean where we can process it
.to("bean:MyOrderService?method=handleOrder")
// this is important to end the splitter route as we do not want to do more routing
// on each split message
.end()
// after we have split and handled each message we want to send a single combined
// response back to the original caller, so we let this bean build it for us
// this bean will receive the result of the aggregate strategy: MyOrderStrategy
.to("bean:MyOrderService?method=buildCombinedResponse")
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/**
* This is our own order aggregation strategy where we can control
* how each split message should be combined. As we do not want to
* lose any message, we copy from the new to the old to preserve the
* order lines as long we process them
*/
public static class MyOrderStrategy implements AggregationStrategy {
public Exchange aggregate(Exchange oldExchange, Exchange newExchange) {
// put order together in old exchange by adding the order from new exchange
if (oldExchange == null) {
// the first time we aggregate we only have the new exchange,
// so we just return it
return newExchange;
}
String orders = oldExchange.getIn().getBody(String.class);
String newLine = newExchange.getIn().getBody(String.class);
LOG.debug("Aggregate old orders: " + orders);
LOG.debug("Aggregate new order: " + newLine);
// put orders together separating by semi colon
orders = orders + ";" + newLine;
// put combined order back on old to preserve it
oldExchange.getIn().setBody(orders);
// return old as this is the one that has all the orders gathered until now
return oldExchange;
}
}
/**
* This is our own order aggregation strategy where we can control
* how each split message should be combined. As we do not want to
* lose any message, we copy from the new to the old to preserve the
* order lines as long we process them
*/
public static class MyOrderStrategy implements AggregationStrategy {
public Exchange aggregate(Exchange oldExchange, Exchange newExchange) {
// put order together in old exchange by adding the order from new exchange
if (oldExchange == null) {
// the first time we aggregate we only have the new exchange,
// so we just return it
return newExchange;
}
String orders = oldExchange.getIn().getBody(String.class);
String newLine = newExchange.getIn().getBody(String.class);
LOG.debug("Aggregate old orders: " + orders);
LOG.debug("Aggregate new order: " + newLine);
// put orders together separating by semi colon
orders = orders + ";" + newLine;
// put combined order back on old to preserve it
oldExchange.getIn().setBody(orders);
// return old as this is the one that has all the orders gathered until now
return oldExchange;
}
}
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Red Hat Summit
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