Simple Spring Memcached – Spring Caching Abstraction and Memcached | Java Logs. Caching remains the one of the most basic performance enhancing mechanism in any read heavy database application. Spring 3.1 release came up with a cool new feature called Cache Abstraction. Spring Cache Abstraction provides the application developers an easy, transparent and decoupled way to implement any caching solution.
Memcached is one of the most popular distributed caching system used across apps. In this post we will focus on how to integrate memcached with a Spring enabled applications. Getting The Code Code for this tutorial can be downloaded from following SVN location. For the tutorial to work please create the following table in your db. Integration Steps 1. 2. 3. SSMCacheManager extends org.springframework.cache.support.AbstractCacheManager – It is an abstract class and is a manager for underlying Cache. 4.
@Cacheable – This annotation is used to mark a method whose results are to be cached. Niraj. Dozer Type Conversion. Dozer is a fast and flexible framework for mapping back and forth between Java Beans. Coupled with Camel's automatic type conversion, it's a formidable tool for dealing object to object mapping headaches that crop up in enterprise integration projects. To explain how Dozer can be uses within Camel we'll use the following example of a simple Customer Support Service. The initial version of the Service defined a 'Customer' object used with a very flat structure. In the next version it was decided to structure the data better in the model by moving the address data into its own type, with the resultin domain object ending up looking like Much nicer!
To a large extent the two object share identical structure, with only the address representation being different. This is where Dozer comes in; It uses reflection to map data between two bean types using a set of simple mapping rules. Configuring Dozer Dozer's configuration is extremely flexible and many mapping scenarios are covered here. Icon. Facebook Integration using Apache Camel - Aaron Mulder, CTO Chariot Solutions. Solr Tutorial. Camel, CXF and JMS by example | Software Art Blog. While working on a typical customer SOA/ESB integration project we ran into some complex communication issues. It’s required that all communication between the different services and ESB is done using SOAP over JMS.
CXF already has embedded support for JMS, but apart from a complex setup, this also caused that our services were no longer available using plain HTTP (used for our FitNesse functional tests). As it took quite some time to figure out how to properly hookup CXF and Camel, and exposing them via various protocols (even email if you’d like to) I wanted to share with you how we implemented this via an example project. About Camel and CXF Apache CXF is a popular webservices framework which we’ll be using to provide the SOAP support. When I first came across Apache Camel it felt like a tiny ESB (or rather, perhaps how an ESB should actually work). A quick scan of the components overview will show all the various “transports” supported by Camel. The example application Conclusion. ToolBits: Quick RESTful web services with the Camel cxfbean component.
Trying to create a REST web service using the old Camel cxfrs component was somewhat a pain and not very intuitive in my opinion. It was such a pain I didn't even want to write an example post for it. I really wanted something more automated like Jersey. Luckly the Apache Camel cxfbean component makes putting together a REST web service much easier. Just annotate your service class and use it as the resource for the cxfbean component. If you want to produce and consume a data format like JSON, you simply pass the necessary processor to the list of cxfbean processors.
The CXF libaries include a JSON processor that you can quickly hook up - but I ran into a couple of issues. First you have to annotate your data classes with JAXB annotations (which you may not be able to do depending on your situation.) Since I was using Groovy I ran into an issue where Groovy automatically adds a getMetaClass method that returns an Interface and the CXF JSON processor didn't like that. Open Source Integration with Apache Camel and How Fuse IDE Can Help.
Take any integration project and you have multiple applications talking over multiple transports on multiple platforms. As you can imagine, in large enterprise applications this can get complex very fast. Much of the complexity stems from two issues: 1. dealing with the specifics of applications and transports, and 2. coming up with good solutions to integration problems. Making your applications speak transports and APIs is relatively easy on its own.
Ignoring the mechanics of how to connect with multiple transports and APIs, we can focus on the high level design of how applications interact. Apache Camel was created with the intention of addressing these two issues. What is Camel? Apache Camel is an open source Java framework that focuses on making integration easier and more accessible to developers. . • concrete implementations of all the widely used EIPs • connectivity to a great variety of transports and APIs Figure 1 shows how these three items actually map to Camel concepts. . • Java DSL. Apache Camel + Smooks | Smooks Data Integration. I did a little playing with Camel over the weekend… had a go at integrating Smooks. I think those using Camel may find it interesting as another option. The integration was simple enough and can be seen in this svn workspace (including tests etc).
With better knowledge of Camel, I’m sure there’s a better way of integrating it, but at least it’s a start. At the moment, you can map String or Java results into the out-message of the Camel Exchange, so you can do templating or java binding (not exposing validation results yet) of XML and non-XML data. So you can do lots of the normal Smooks type processing. The aspect I think most Camel users might find interesting is the potential wrt splitting and routing of huge messages (XML and non-XML). Lets look at a simple example, where we have an XML message stream containing customer account activity logs (or… could be CSV formatted).
The RouteBuilder config (can also configure the SmooksProcessor via Java ala DSL) … 05. from("file:src/data/logs? 26. Using Jackson with Apache CXF | wolfeidau. Whilst working on my Javascript, ExtJS 4 and Apache CXF skills I came across a solution to a problem I encountered getting ExtJS to talk to Apache CXF using JSON. The basis for this issue revolves around “wrapping” in JSON and two different schools on what is correct way to encode it. As far as I can see there is the more verbose version which Jettison, the default JSON serialiser in Apache CXF produces, then there is the “unwrapped” version which the alternate serialiser Jackson produces. In my case I chose Jackson the more terse version, this is good for a couple of reasons: It is compatible with ExtJS without any modifications It is smaller and therefore produces less data on the wire. Also I like the annotations that Jackson comes with, and find it a bit easier to work with than Jettison.
So to enable Jackson I modify my projects Maven pom file I add the following dependency. In addition to this some changes are required in the spring configuration which houses our RESTful services. Camel: Bean Binding. Bean Binding in Camel defines both which methods are invoked and also how the Message is converted into the parameters of the method when it is invoked. Choosing the method to invoke The binding of a Camel Message to a bean method call can occur in different ways, in the following order of importance: In cases where Camel cannot choose a method to invoke, an AmbiguousMethodCallException is thrown. By default the return value is set on the outbound message body. Parameter binding When a method has been chosen for invocation, Camel will bind to the parameters of the method. The following Camel-specific types are automatically bound: org.apache.camel.Exchangeorg.apache.camel.Messageorg.apache.camel.CamelContextorg.apache.camel.TypeConverterorg.apache.camel.spi.Registryjava.lang.Exception So, if you declare any of these types, they will be provided by Camel.
Let's review some examples: Below is a simple method with a body binding. We can use Exchange as well: You can also have multiple types: Examples. When to use Apache Camel? Apache Camel is one of my favorite open source frameworks in the JVM / Java environment. It enables easy integration of different applications which use several protocols and technologies. This article shows when to use Apache Camel and when to use other alternatives. The Problem: Enterprise Application Integration (EAI) Enterprise application integration is necessary in almost every company due to new products and applications. Integrating these applications creates several problems. New paradigms come up every decade, for example client / server communication, Service-oriented Architecture (SOA) or Cloud Computing.
Besides, different interfaces, protocols and technologies emerge. Enterprise Integration Patterns (EIP) Of course, you could reinvent the wheel for each problem, write some spaghetti code and let the applications work together. Enterprise Integration Patterns (www.eaipatterns.com) help to fragment problems and use standardized ways to integrate applications. Conclusion. Spring vs Java EE Web Dev: Using Camel with Jackson JSON Serialization. Camel: Components. Components Included Camel includes the following Component implementations via URIs. External Components The following components are not part of the standard Apache Camel distribution and are available under a variety of licenses but can be used to extend Camel's functionality. Poster The Apache Camel Components Poster (PDF, PDF w/ crops and bleed, JPG image, Printed 2.12.1, Printed 2.12.2, YouTube) by Gliesian LLC.
(October, 2013) See Also. CXF -- JAX-RS Data Bindings. JAX-RS : Data Bindings The request and response can be marshalled and unmarshalled to/from Java object using JAXB. There's a number of ways to tell to the JAXB provider how objects can be serialized. The simplest way is to mark a given type with @XmlRootElement annotation. For example: In the example below, the Customer object returned by getCustomer is marshaled using JAXB data binding: The wire representation of Customer object is: The simplest way to work with the collections is to define a type representing a collection. Alternatively to using @XmlRootElement and Collection wrappers, one can provide an Object factory which will tell JAXB how to marshal a given type (in case of Collections - its template type). Another option is to register one or more JAX-RS ContextResolver providers capable of creating JAXBContexts for a number of different types.
Configuring JAXB provider The default JAXB provider can be configured in a number of ways. JAXB and Moxy Jettison Configuring JSON provider 1. Camel: NotifyBuilder. Available as of Camel 2.2 The NotifyBuilder is a builder from the org.apache.camel.builder package which allows you to build expressions and then test or wait for that condition to occur. The expressions is based around notifications about Exchange being routed.
So what does that mean? It means that you can build an expressions which can tell you when Camel is finished with routing 5 messages etc. You may want to use this when testing a route which you cannot or will not use Mocks. Suppose we have a very simple route: Now you want to test this route without using mocks or the likes. This is a very basic example with a simple builder expression. Methods These methods is for building the expression: And these methods is for using the builder after creating the expression: We will most likely add additional methods in the future, so check out the NotifyBuilder for latest and greatest methods. Difference between Done and Completed Examples Here both 5 foo messages and 7 bar messages must be done.
Camel: Camel Maven Archetypes. Camel is distributed with the following archetypes for Maven end users. Archetype Supported The maven coordinates for these archetypes is the following: Icon When using these archetypes, make sure your package name is not org.apache.camel (or a sub package of this) as this will instruct Camel to search in its own packages for your routes.
This can also cause Camel not to start, as shown in CAMEL-1197. Snapshot archetypes If you would like to use an archetype from an unreleased version of Camel, you just need to let the maven-archetype-plugin know where to look for it. Notice that archetypes will now be downloaded from Apache's snapshot repo instead of Maven central. When the project is created, you may need to add another repository to the pom.xml file. Examples See Creating a new Spring based Camel Route for a sample how to use the camel-archetype-java and camel-archetype-spring archetypes.