apache camel - rotas para as suas mensagens

Apache Camelrotas para as suas mensagens

Bruno Borges2009

Apache Camel

Integração

JMS

FTP

HTTP

TCP

SOAP

SOAP

SMTP

JPA

JDBC

RSS

JBI

JT/400

FIX

Twitter

MSMQ

LDAP

Integração

Framework Open Source

para

Padrões de Integração

EIP● Enterprise Integration Patterns

Padrões

M e ssa g e F ilte rCo m o e vit a r re ce b im e n to d e m e n sa g e n s in d e se ja da s?

S p lit te r

A g g re g a to r

R e se q u e n ce r

R e cip ie n t L istCo m o ro te a r u m a m e n sa g em a u m a list a d inâ m ica d e d e st in a rá r io s?

C o n te n t- b a se d R o u te r

Co m o t ra ta r u m a s itu a çã o o n d e a im p le m e n ta çã o d e u m a fu n çã o ló g ica e stá e sp a lh a d a e m m ú lt ip los s is te m a s?

Co m o p ro ce ssa r u m a m e n sa ge m , se e sta co n té m e le m e n to s q u e d e ve m se r p ro ce ssa d o s in d iv id u a lm e n te d e fo rm a s d ife re n tes?

Co m o co m b ina r o re su lta d o d e m e n sa g e n s in d iv idu a is, p o ré m re la cio n a d as, n u m a ú n ica sa íd a ?

Co m o re to m a r a o rd e m d e m e n sa g e n s re la c io n a d a s e n via d as fo ra d e o rd e m ?

Roteamento de Mensagens

Roteamento

mensagem

_________________________________

___________ ______

Linguagens● BeanShell● JavaScript● Groovy● Python● PHP● Ruby● Scala

● SQL● XPath● XQuery● JSR 223 Scripting● OGNL● EL (JSP/JSF)

Componentes● ActiveMQ● AMQP● Atom / RSS● Beans● Comet (Jetty)● CXF● DataSet (testes)● Direct● File● FIX● FTP / SFTP● Hibernate● HL7 MLLP● HTTP● iBatis

● JBI / JCR● JDBC / JPA● JMS● JT/400● LDAP● LOG● Mail● Mina● MSMQ● Quartz● RMI● Velocity● XMPP● Xquery● ... Twitter ?

Definição de Rotas● CamelContext

● RouteBuilder● DSL – Domain Specific Language

– Java

– Spring XML

– Scala

public class CamelStartup { public static void main(String... args) throws Exception { CamelContext context = new DefaultCamelContext(); context.addRoutes(new MyRoute()); context.start(); }}

Definição de Rotas● Java

public class TwitterRoute extends RouteBuilder {

public void configure() throws Exception {from("file:outbox")

.transform(body().convertToString())

.to("twitter:tweetit");

from("twitter:tweets?follow=brunoborges").transform(body().convertToString())

.to("file:twitters-log");}

}

Definição de Rotas● Spring XML

<camelContext xmlns="http://activemq.apache.org/camel/schema/spring"> <route> <from uri="activemq:topic:Quotes"/> <filter> <xpath>/quote/product = 'widget'</xpath> <to uri="mqseries:WidgetQuotes"/> </filter> </route></camelContext>

Definição de Rotas● Scala

class MyRouteBuilder extends RouteBuilder { "direct:a" --> "mock:a" "direct:b" to "mock:b" }

Repetindo ...

M e ssa g e F ilte rCo m o e vit a r re ce b im e n to d e m e n sa g e n s in d e se ja da s?

S p lit te r

A g g re g a to r

R e se q u e n ce r

R e cip ie n t L istCo m o ro te a r u m a m e n sa g em a u m a list a d inâ m ica d e d e st in a rá r io s?

C o n te n t- b a se d R o u te r

Co m o t ra ta r u m a s itu a çã o o n d e a im p le m e n ta çã o d e u m a fu n çã o ló g ica e stá e sp a lh a d a e m m ú lt ip los s is te m a s?

Co m o p ro ce ssa r u m a m e n sa ge m , se e sta co n té m e le m e n to s q u e d e ve m se r p ro ce ssa d o s in d iv id u a lm e n te d e fo rm a s d ife re n tes?

Co m o co m b ina r o re su lta d o d e m e n sa g e n s in d iv idu a is, p o ré m re la cio n a d as, n u m a ú n ica sa íd a ?

Co m o re to m a r a o rd e m d e m e n sa g e n s re la c io n a d a s e n via d as fo ra d e o rd e m ?

Roteamento de Mensagens

Content-based Router

RouteBuilder route = new RouteBuilder() { public void configure() { from("seda:a") .choice() .when(header("foo").isEqualTo("bar")) .to("seda:b") .when(header("foo").isEqualTo("cheese")) .to("seda:c") .otherwise() .to("seda:d"); }};


<camelContext xmlns="http://activemq.apache.org/camel/schema/spring"> <route> <from uri="activemq:NewOrders" /> <choice> <when> <xpath>/order/product = 'widget'</xpath> <to uri="activemq:Orders.Widgets" /> </when> <when> <xpath>/order/product = 'gadget'</xpath> <to uri="activemq:Orders.Gadgets" /> </when> <otherwise> <to uri="activemq:Orders.Bad" /> </otherwise> </choice> </route></camelContext>


"direct:a" ==> { to ("mock:polyglot") choice { when (_.in == "<hello/>") to ("mock:english") when (_.in == "<hallo/>") { to ("mock:dutch") to ("mock:german") } otherwise to ("mock:french") }}

Message Filter

public class MyRouteBuilder extends RouteBuilder { public void configure() { from("activemq:topic:Quotes") .filter() .xpath("/quote/product = 'widget'") .to("mqseries:WidgetQuotes"); }}

Message Filter

<camelContext xmlns="http://activemq.apache.org/camel/schema/spring"> <route> <from uri="activemq:topic:Quotes" /> <filter> <xpath>/quote/product = 'widget'</xpath> <to uri="mqseries:WidgetQuotes" /> </filter> </route></camelContext>

Message Filter

"direct:a" when(_.in == "<hello/>") to("mock:a")

"direct:b" ==> { when(_.in == "<hallo/>") { --> ("mock:b") to ("mock:c") } otherwise { to ("mock:e") } to ("mock:d")}

Message Splitter

public class MyRouteBuilder extends RouteBuilder { public void configure() { from("file://orders") .splitter(body().tokenize("\n")) .to("activemq:Order.Items"); }}

Message Splitter

public class MyRouteBuilder extends RouteBuilder { public void configure() { from("file://orders") // Splitter com XQuery .splitter(xquery("/order/items")) .to("activemq:Order.Items"); }}

Message Aggregator

public class MyRouteBuilder extends RouteBuilder { public void configure() { from("activemq:Inventory.Items") .aggregator().xpath("/order/@id") .to("activemq:Inventory.Order"); }}

Resequencer

public class MyRouteBuilder extends RouteBuilder { public void configure() { from("direct:a") .resequencer(header("JMSPriority")) .to("seda:b"); }}

Recipient List

public class MyRouteBuilder extends RouteBuilder { public void configure() { from("direct:a") .recipientList(header("destinos")); }}

Camel Twitter

CAMEL-1520

Padrões

C o n te n t F ilte r

N o rm a liz e r

M e ssa g e T ra n sla to r

Co m o sistem a s u sa n d o d ife re n te s fo rm a to s d e m e n sa g e n s p o d e m co m u n ica r -se e n t re s i?

C o n te n t E n rich e r

Co m o se co m u n ica r com u m sis te m a se a m e n sa g em d e o r ig e m n ã o d isp õ e d e to do s o s da do s n e ce ssá r io s?

Co m o sim p lif ica r m e n sa g e n s m u ito g ra n d e s, q u a n do so m e n te p o u co s d a d o s in te re ssa m ?

Co m o p ro ce ssa r m e n sa g e n s se m a n t ica m e n te sim ila re s, m a s e m d ife re n te s fo rm a to s?

Tradução de Mensagens

Message Translator

Content Enricher

Content Filter

Exemplosfrom("direct:inicio")

.process(new Processor() {public void process(Exchange exchange) {

Message in = exchange.getIn();in.setBody(in.getBody(String.class) + " by Camel!");

}})

.to("mock:result");

from("direct:inicio").transform(body().append(" Camel!"))

.to("mock:result");

<camelContext xmlns="http://camel.apache.org/schema/spring"> <route> <from uri="direct:start" /> <transform> <simple>${in.body} extra data!</simple> </transform> <to uri="mock:end" /> </route></camelContext>

Normalizer

Dependency Injection

Google Guice

Beans Tradutores

public class MinhaRota extends RouteBuilder {

@Overridepublic void configure() throws Exception {

from("activemq:Inbox").beanRef("meuBean").beanRef("meuOutroBean", "metodoQualquer")

.to("activemq:Outbox");}

}

Beans Conversores

package org.apache.camel.component.twitter;

import java.text.ParseException;import org.apache.camel.Converter;

@Converterpublic class TwitterConverter {

@Converter public static String toString(Status status) throws ParseException { return status.toString(); }

}

Anotações em Beans

public class Foo {

public void onBar(@XPath("/foo/bar") String nome,@Header("JMSCorrelationID") String id) {

// faz algo}

}

Beans Consumidores

public class Foo {

@Consume(uri = "jms:queueFoo")public void onFoo(

Exchange e, @Header("JMSGroupID") String grupo) {

// faz algo}

}

Camel, onde tem?● Apache ServiceMix (ESB)● OpenESB● Apache ActiveMQ● FUSE● Java Embedded

Monte um Camelo!

Perguntas ?Perguntas ?

Links

http://camel.apache.org

http://enterpriseintegrationpatterns.com

http://www.jawsys.com.br

http://blog.brunoborges.com.br

apache camel - rotas para as suas mensagens

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