Apache camel

What does Camel stand for?

ConciseApplicationMessagingExchangeLanguage

About Me

12 years in Software Industry Build software in Project Management, CAD/CAM, Banking, Education,

Ecommerce C++,C #.Net, Java, Scala, Akka, Spring, Node.JS, Vert.x, RDBMS,

MongoDB www.Marutsingh.com

What is Apache Camel

Quote from the web site http://camel.apache.org

Apache Camel is apowerful Open SourceIntegration Frameworkbased on knownEnterprise Integration Patterns

http://camel.apache.org/


Why do we need integration? Your apps are build using different tech stacks Critical for your business to integrate

Why Integration Framework? Framework do the heavy lifting Focus on business problem Not "reinventing the wheel"


What is Enterprise Integration Patterns?


Use Case

ActiveMQ REST Api


What is Enterprise Integration Patterns?

EIP

Filter Pattern

fromA

send toB

filtermessage

Camel’s architecture

Filter Route

Endpoint A = endpoint("activemq:queue:quote");

Endpoint B = endpoint("mq:quote");Predicate isWidget =

xpath("/quote/product = ‘widget’");

from(A).filter(isWidget).to(B);

Filter Route

import org.apache.camel.builder.RouteBuilder;

public class FilterRoute extends RouteBuilder {

public void configure() throws Exception { Endpoint A = endpoint("activemq:queue:order"); Endpoint B = endpoint("mq:inventory"); Predicate isWidget = xpath("/quote/product = ‘widget’");

from(A).filter(isWidget).to(B); }}

Content Based Router

Content Based Route – Java DSL

from("activemq:orders") .choice() .when() .jsonpath(“$..order[[email protected]==’cod’)]”) .to("activemq:codOrders") .otherwise() .to("activemq:prepaidOrders");

Camel Components

Summary Integration framework > 180 components out of the box Enterprise Integration Patterns (EIP) Routing and mediation Domain Specific Language (DSL) Endpoints as URIs Predicate and Expressions Very extensible and configurable No heavy specification No container dependency Payload agnostic Connectivity to a great wealth of transports Apache licensed

Code Example

Goals 1) Pickup files from a directory 2) Make sure we only pickup 3 files per 30 seconds 3) Store into JMS queue 4) Listen on JMS queue 5) And upload file to FTP server

Goals using Enterprise Integration Patterns

from throttle to from to