@Test
public void runDemo() throws Exception{
ConfigurableApplicationContext ctx =
new ClassPathXmlApplicationContext("META-INF/spring/integration/DynamicFtpOutboundChannelAdapterSample-context.xml");
MessageChannel channel = ctx.getBean("toDynRouter", MessageChannel.class);
File file = File.createTempFile("temp", "txt");
Message<File> message = MessageBuilder.withPayload(file)
.setHeader("customer", "cust1")
.build();
try {
channel.send(message);
}
catch (MessagingException e) {
assertThat(e.getCause().getCause().getCause(), instanceOf(UnknownHostException.class));
assertTrue(e.getCause().getCause().getCause().getMessage().startsWith("host.for.cust1"));
}
// send another so we can see in the log we don't create the ac again.
try {
channel.send(message);
}
catch (MessagingException e) {
assertThat(e.getCause().getCause().getCause(), instanceOf(UnknownHostException.class));
assertTrue(e.getCause().getCause().getCause().getMessage().startsWith("host.for.cust1"));
}
// send to a different customer; again, check the log to see a new ac is built
message = MessageBuilder.withPayload(file)
.setHeader("customer", "cust2").build();
try {
channel.send(message);
}
catch (MessagingException e) {
assertThat(e.getCause().getCause().getCause(), instanceOf(UnknownHostException.class));
assertTrue(e.getCause().getCause().getCause().getMessage().startsWith("host.for.cust2"));
}
// send to a different customer; again, check the log to see a new ac is built
//and the first one created (cust1) should be closed and removed as per the max cache size restriction
message = MessageBuilder.withPayload(file)
.setHeader("customer", "cust3").build();
try {
channel.send(message);
}
catch (MessagingException e) {
assertThat(e.getCause().getCause().getCause(), instanceOf(UnknownHostException.class));
assertTrue(e.getCause().getCause().getCause().getMessage().startsWith("host.for.cust3"));
}
//send to cust1 again, since this one has been invalidated before, we should
//see a new ac created (with ac of cust2 destroyed and removed)
message = MessageBuilder.withPayload(file)
.setHeader("customer", "cust1").build();
try {
channel.send(message);
}
catch (MessagingException e) {
assertThat(e.getCause().getCause().getCause(), instanceOf(UnknownHostException.class));
assertEquals("host.for.cust1", e.getCause().getCause().getCause().getMessage());
}