ESB, OSGi, and the Cloud

Size: px

Start display at page:

Download "ESB, OSGi, and the Cloud"

Edwina Carter
5 years ago
Views:

1 ESB, OSGi, and the Cloud Making it Rain with ServiceMix 4 Jeff Genender CTO Savoir Technologies

2 Jeff Genender - Who is this Shmoe? Apache CXF JSR Java EE 6

3 Rules of Engagement

4 Engage yourself!

5 Agenda Evolution of SOA The Cloud The ESB Problem The Solution?

20 Cloud

21 Cloud Hardware as a service Dynamically Scalable Hence the word elastic Scalable based on load Provision Systems in Minutes Not Hours! This is a Game Changer!

22 Cloud - Typical Use Case

23 A Marriage! That s What s Next!

24 Looking at the ESB

25 Typical Large ESB Implementation

26 What Global 2000 Really Want - Answer to What s Next?

27 Mega Service Bus Characteristics Made up of multiple smaller ESBs connected as one High availability Immediate provisioning of hardware Immediate ESB provisioning Service provisioning Control lifecycle of particular services Hot deploy and un-deploy services on demand Versioning of services

28 Use Cases

29 Architectural challenges Topology (you can t just assume.. you gotta plan) Communication between containers High Availability Failover True Hot Deployability and Provisioning Java/JavaEE can t do it properly Full restarts are required Classloader isolation is key Cross references kill service provisioning Monitoring Service state Intricate control of servers

30 Topology - The Bottom Line

31 Topology - Network of Brokers (Scalability)

32 Topology - Master/Slave (High availability)

33 Topology - Network of Brokers + Master/Slave

34 Panacea for Hot Deploy - OSGi Is The Answer OSGi was MADE for an ESB The Bundles *are* the service Lifecycle Start/Stop Dependency Management Versioning Multiple versions can run at the same time Most importantly! Silo d and Protected Classloading No hanging references thus causing OutOfMemoryExceptions No restarts of the container!

35 OSGi - Lifecycle package org.example; import org.osgi.framework.bundleactivator; import org.osgi.framework.bundlecontext; public class Activator implements BundleActivator { } private BundleContext context; public void start(bundlecontext context) throws Exception { System.out.println("Starting: Hello World"); this.context = context; } public void stop(bundlecontext context) throws Exception { System.out.println("Stopping: Goodbye Cruel World"); this.context = null; }

36 OSGi - META-INF/MANIFEST.MF Bundle-Name: Hello World Bundle-SymbolicName: org.example.helloworld Bundle-Description: A Hello World bundle Bundle-ManifestVersion: 2 Bundle-Version: Bundle-Activator: org.example.activator Export-Package: org.example.helloworld;version="1.0.0" Import-Package: org.osgi.framework;version="1.3.0"

37 Monitoring Java Management Extensions (JMX) / MBeans This goes without saying for any monitoring Control provisioning via JMX console(s) Ability to log in via console to each machine Control install/uninstall via console Review logs via console Review service and container status via console Allow secure communication via console (likely over a public internet) There is a catch! Don t necessarily allow access to the operating system

38 How ya gonna do it?

39 The ServiceMix Stack

40 The Bus Comes with Embedded ActiveMQ Can use it externally too Robust Handles Network of Brokers Topology for High Scalability Has Master/Slave capabilities for High Availability Discovery - Very important! Static based Multicast/Zeroconf (Rendezvous) LDAP Based

41 Discovery

42 Components - Apache Camel Router activemq ibatis mail rmi udp activemq.journal imap mina rnc validation bean irc mock rng velocity cxf jdbc msv seda vm direct jetty multicast sftp xmpp event jbi pojo smtp xquery file jms pop string-template xslt ftp jpa quartz timer webdav http log queue tcp

43 Camel Routes - Spring DSL Spring XML configuration: <camelcontext xmlns=" <route> <from uri="activemq:topic:quotes"/> <filter> <xpath>/quote/product = widget </xpath> <to uri="activemq:queue:widgetquotes"/> </filter> </route> </camelcontext>

44 Camel Routes - Java DSL Java DSL Code: package com.acme.quotes; import org.apache.camel.builder.routebuilder; public class MyRouteBuilder extends RouteBuilder { public void configure() { } } // forward widget quotes to MQSeries from("activemq:topic:quotes). filter().xpath("/quote/product = widget "). to("activemq:queue:widgetquotes");

45 Creating an OSGi Bundle is as easy as... A Maven POM! <build>  <plugin> <groupid>org.apache.felix</groupid> <artifactid>maven-bundle-plugin</artifactid> <extensions>true</extensions> <version>${felix-version}</version> <configuration> <manifestlocation>target/meta-inf</manifestlocation> <instructions> <Bundle- SymbolicName> ${pom.groupid}.${pom.artifactid}</bundle-symbolicname> <Import-Package> org.apache.activemq.camel.component;version="[5.3.0,5.4.0)", org.apache.camel;version="[2.0,2.2)", org.apache.camel.component;version="[2.0,2.2)", org.apache.camel.component.jms;version="[2.0,2.2)", * </Import-Package> <Include-Resource>src/main/resources</Include-Resource> <Spring-Context>*;publishcontext:=false;create-asynchronously:=true</Spring-Context> <Private-Package></Private-Package> </instructions> </configuration></plugin>  </build>

46 ServiceMix Console

49 Dear Demo God, I Pray That It Works...

50 Questions? Thank You! jgenender at savoirtech.com jgenender at apache.org

Spoilt for Choice Which Integration Framework to choose? Mule ESB. Integration. Kai Wähner

Spoilt for Choice Which Integration Framework to choose? Integration vs. Mule ESB vs. Main Tasks Evaluation of Technologies and Products Requirements Engineering Enterprise Architecture Management Business