/**
* The MIT License
* Copyright (c) 2014-2016 Ilkka Seppälä
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package com.iluwatar.message.channel;
import org.apache.camel.CamelContext;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.impl.DefaultCamelContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
*
* When two applications communicate with each other using a messaging system they first need to
* establish a communication channel that will carry the data. Message Channel decouples Message
* producers and consumers.
* <p>
* The sending application doesn't necessarily know what particular application will end up
* retrieving it, but it can be assured that the application that retrieves the information is
* interested in that information. This is because the messaging system has different Message
* Channels for different types of information the applications want to communicate. When an
* application sends information, it doesn't randomly add the information to any channel available;
* it adds it to a channel whose specific purpose is to communicate that sort of information.
* Likewise, an application that wants to receive particular information doesn't pull info off some
* random channel; it selects what channel to get information from based on what type of information
* it wants.
* <p>
* In this example we use Apache Camel to establish two different Message Channels. The first one
* reads from standard input and delivers messages to Direct endpoint. The second Message Channel is
* established from the Direct component to console output. No actual messages are sent, only the
* established routes are printed to standard output.
*
*/
public class App {
private static final Logger LOGGER = LoggerFactory.getLogger(App.class);
/**
* Program entry point
*/
public static void main(String[] args) throws Exception {
CamelContext context = new DefaultCamelContext();
context.addRoutes(new RouteBuilder() {
@Override
public void configure() throws Exception {
from("stream:in").to("direct:greetings");
from("direct:greetings").to("stream:out");
}
});
context.start();
context.getRoutes().stream().forEach(r -> LOGGER.info(r.toString()));
context.stop();
}
}