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4.5. Message Router
Overview 링크 복사링크가 클립보드에 복사되었습니다!
링크 복사링크가 클립보드에 복사되었습니다!
A message router, shown in Figure 4.7, “Message Router Pattern”, is a type of filter that consumes messages from a single consumer endpoint and redirects them to the appropriate target endpoint, based on a particular decision criterion. A message router is concerned only with redirecting messages; it does not modify the message content.
Figure 4.7. Message Router Pattern
A message router can easily be implemented in Apache Camel using the
choice()
processor, where each of the alternative target endpoints can be selected using a when()
subclause (for details of the choice processor, see Section 1.5, “Processors”).
Java DSL example 링크 복사링크가 클립보드에 복사되었습니다!
링크 복사링크가 클립보드에 복사되었습니다!
The following Java DSL example shows how to route messages to three alternative destinations (either
seda:a
, seda:b
, or seda:c
) depending on the contents of the foo
header:
from("seda:a").choice() .when(header("foo").isEqualTo("bar")).to("seda:b") .when(header("foo").isEqualTo("cheese")).to("seda:c") .otherwise().to("seda:d");
from("seda:a").choice()
.when(header("foo").isEqualTo("bar")).to("seda:b")
.when(header("foo").isEqualTo("cheese")).to("seda:c")
.otherwise().to("seda:d");
XML configuration example 링크 복사링크가 클립보드에 복사되었습니다!
링크 복사링크가 클립보드에 복사되었습니다!
The following example shows how to configure the same route in XML:
Choice without otherwise 링크 복사링크가 클립보드에 복사되었습니다!
링크 복사링크가 클립보드에 복사되었습니다!
If you use
choice()
without an otherwise()
clause, any unmatched exchanges are dropped by default.