This Refcard will help Java developers working with multi-threaded programs to understand core concurrency concepts and how to apply them. Overview the. This Refcard covers JVM internals, class loading (updated to reflect the new Metaspace in Java 8), garbage collection, troubleshooting, monitoring, concurrency. This Refcard focuses on the design, deployment, service discovery, and management of Java applications on the open-source project called Docker so that you.

Java Enterprise Edition allows programmers to write less and focus on delivering clean business logic. Enterprise software development is inherently complex; multi-user systems open the door to concerns such as transactional integrity, security, persistence integration, and interaction between components.

defcard

Very simply put, the mission of the Java Enterprise Edition is to enable an out-of-the-box set of configurable services and functionality, which allow the programmer to write less and focus on delivering clean business logic. Java EE 7 is in fact an aggregate of many interoperable technologies designed to deliver a unified experience.

Application Servers which are certified to the standards defined by the Java Community Process are intended to service applications written to the specifications within the platform. This umbrella specification ties together the various subsystems that comprise retcard platform, and provides additional integration support where necessary.

The Java EE 7 platform added the following new subsystems:. Several other technologies were updated to provide improved productivity and features:. WebSocket provides a full-duplex, bi-directional communication over a single TCP channel. Jaava overcomes a basic limitation of HTTP where a server can send updates to the client and a TCP connection is maintained between client and server until one of them explicitly closes it.

WebSocket is also a very lean protocol and requires minimal framing on the wire. Client endpoints are defined with ClientEndpoint and can be connected to a server endpoint via:.

Batch Applications allows developers to easily define non-interactive, bulk-oriented, long-running tasks in jvaa and task-oriented ways. It provides a programming model for batch applications and a runtime for scheduling and executing batch jobs.

It supports item-oriented processing using Chunks and task-oriented processing using Batchlets. Each item is read, processed, and aggregated for writing.

JSON is a lightweight jaca format and is the common format of the web for consuming and creating web services data. The event-based parser allows an application developer uava ask for an event using parser. Event which consists of values that indicate the start of revcard object, end of an object, and other similar events. This gives more procedural control over processing the JSON.

Microservices in Java

A new default instance of these objects is available for injection in the following JNDI namespace:. An application-specific ManagedExecutor can be created by adding the following fragment to web. The standard principles of REST, such as—identifying a resource via URI; defining a set of methods to access the resource; and allowing for multiple representation formats of a resource—can be easily marked in a POJO via annotations.

The Client API also permits retrieval of the response asynchronously by adding an async method call before the method invocation. JAX-RS enables the creation of server-side endpoints using annotations.

JAX-RS 2 introduces asynchronous endpoints that may be defined to suspend the client connection if the response is not readily available and later resume when it is. Here, an Executor is used to perform work in a separate thread:.

A synchronous endpoint that uses PathParam to identify a single book.

Core Java Reference Card

Filters are mainly used to modify or process incoming and outgoing request or response headers. An interceptor is defined by implementing ReaderInterceptor or WriterInterceptor, or both.

Message-oriented middleware MOM allows sending and receiving messages between distributed systems. The newly introduced, simplified API is very fluent, uses runtime exceptions, is annotation-driven, and makes use of CDI to reduce the boilerplate code. Queues may be injected using the Resource annotation:. CDI manages the lifecycle and interactions of stateful components bound to well-defined contexts.

CDI provides typesafe dependency injection between components and defines: The following are examples of beans that would be automatically enabled for injection using default settings. By default, CDI interceptors are disabled. They can be enabled and ordered via the javax. Priority annotation as shown the same can be done for decorators and alternatives:.

Expanded in Java EE 7, the Bean Validation Specification provides for unified declaration of validation constraints upon bean data. It may be used to maintain the integrity of an object at all levels of an application: Here we show how we may apply Bean Validation constraints in a declarative fashion to ensure the integrity of a User object.

Custom constraints can be created to provide reusable annotations with refcrd validation definitions:. To enable internationalization and localization, custom constraint messages may reference resource bundle properties:.

Custom constraints may also javq custom ConstraintValidators. This is specified using the validatedBy attribute:. The ReadListener interface defines three callbacks:. Most enterprise applications will need to deal with persistent data, and interaction with relational databases can be a tedious and difficult endeavor. We may use the new NamedStoredProcedureQuery annotation atop an entity to define a stored procedure:.

In JPA 2, the persistence context is synchronized with the underlying resource manager. Any updates made to the persistence context are propagated to the resource manager. Here is how you can create a container-managed unsynchronized persistence context:. Its primary function is to provide a component-based toolset for easily displaying dynamic data to the user. It also integrates a rich set of patterns to help manage state and promote code reuse.

View files may be placed in subdirectories.

Core Java Concurrency

Below is an example of a Refczrd managed bean referred to as a backing bean that provides the required functionality for the view:.

This module has well-defined entry and exit points defined by the application developer. Flow XML files may be empty if no configuration is required. A configurable set of views in the application will be able to declare themselves as template-clients of any template in the resource library contract. The API defines a high-level interface, annotation, and scope to demarcate transaction boundaries in an application.

The UserTransaction interface enables the application to control transaction boundaries programmatically by explicitly starting and committing or rolling back a transaction. Transactional annotation that enables one to declaratively control transaction boundaries on POJOs. This annotation can be specified at both the class nava method level, where method-level annotations override those at the class level.

All methods of this bean are executed in a transaction managed by the container. This support is provided via an implementation of CDI interceptors that conduct the necessary suspending, resuming, etc. This scope defines a bean instance whose lifecycle is scoped to the currently active JTA transaction. Over a million developers have joined DZone. Refcard Java Enterprise Edition 7. Streamlining Modern Java Development Java Enterprise Edition allows programmers to write less and focus on delivering clean business logic.

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JSR This umbrella specification ties together the various subsystems that comprise the platform, and provides additional integration support where necessary. The Java EE 7 platform added the following new subsystems: Several other technologies were updated to provide improved productivity and features: Contexts and Dependency Injection 1. Annotated server endpoints can be defined as: JSR Batch Applications allows developers to easily define non-interactive, bulk-oriented, long-running tasks in item-oriented and task-oriented ways.

Different elements define the sequence of a job: Independent and sequential phase of a job Flow: Sequence of execution elements that execute together as a unit Split: Set of flows that execute concurrently Decision: Customized way of determining sequencing among step, flows, and splits Public API from javax.

Class Name Description BatchRuntime Represents the JSR runtime JobOperator Interface for operating on batch jobs ItemReader Batch artifact that reads item for chunk processing ItemProcessor Batch artifact that operates on an input item and produces an output item for chunk processing ItemWriter Batch artifact that writes to a list of item for chunk processing Batchlet Batch step for item-oriented processing BatchProperty Annotation to define a batch property injected from Job XML JobListener Interface that intercepts job execution StepListener Interface that intercepts step execution ChunkListener Interface that intercepts chunk processing CheckpointAlgorithm Provides a custom checkpoint policy for chunk steps PartitionMapper Provide unique batch properties for each batch execution PartitionReducer Unit of work demarcation across partitions.

JSR JSON is a lightweight data-interchange format and is the common format of the web for consuming and creating web services data. Four managed objects are provided: Here, an Executor is used to perform work in a separate thread: A message can be easily sent as the following example: A message can be received as: Queues may be injected using the Resource annotation: All types in the archive are considered for injection.

Priority annotation as shown the same can be done for decorators and alternatives: Support for AroundConstruct lifecycle callback for constructors Binding interceptors to constructors Interceptor binding moved to the interceptors spec, allowing for reuse by other specifications Support for decorators on built in beans EventMetadata to allow inspection of event metadata Vetoed annotation allowing easy programmatic disablement of classes Many improvements for passivation capable beans, including TransientReference allowing instances to be retained only for use within the invoked method or constructor Scope activation and destruction callback events AlterableContext allowing bean instances to be explicitly destroyed Class exclusion filters to beans.

New in the 1. This is specified using the validatedBy attribute: Security enhancements Applying run-as security roles to init and destroy uava Added HttpSessionIdListener to enable detection of session fixation attacks, and enabled deterrence of session fixation attacks by enabling changing the session ID via HttpServletRequest. In addition, Servlet 3. This will allow a URL to be specified without a scheme. In this case the scheme of the corresponding request will be used. JSR Most enterprise applications will need to deal with persistent data, and interaction with relational databases can be a tedious and difficult endeavor.

A spec example of a bulk update may look like:

Gallant Waif ended up being one of those books that I had a somewhat difficult time rating. The writing itself is excellent and well-deserving of having been a. Read “Gallant Waif” by Anne Gracie with Rakuten Kobo. Kate Farleigh was absolutely stunned when her refusal to accept Lady Cahill’s offer of “charity” resulted. Gallant Waif [Anne Gracie] on *FREE* shipping on qualifying offers . The story of Major Jack Carstairs, recently returned from the Peninsular.

Sometimes if the book is sufficiently dull, it puts me right back to sleep.

Gallant Waif by Gracie, Anne

I read it right through in a single sitting and wanted to read it again right after I had finished. This book is why I read romances.

I loved everything about it and had not one single, solitary quibble. Gallant Waif was as good a book as I have read in a long time. Major Jack Carstairs has come home from the wars with a scar on his face, and a ruined leg. Jack holes up at Sevenoaks drinking. His strong minded grandmother Lady Cahill who is worried about her beloved grandson, takes off to try and talk sense into his proud galllant stubborn head.

Along the way, she stops to visit Kate Fairleigh, gallantt daughter of her goddaughter. Waof Cahill finds Kate alone and in poverty, her father and brothers all dead in the war. Kate was overseas wiaf the war with her father and brothers and upon their death, she has gallanh one, so she has plans to go into service. Kate most definitely does not want any charity from Lady Cahill. But you do not say no to a proud, imperious regency Lady and before she knows it, Kate has been kidnapped and is on her way to Sevenoaks with Lady Cahill.

Jack is a mess. Jack and Kate are like match and tinder and their fights are a treat. But this is not a Taming of the Shrew story at all.

It is waaif good a story about the healing of two wounded souls as I have ever read. Jack has been hurt in body by the war and in soul by the faithless Julia.

Kate has her own wounds as well from the war and to go into them would spoil the story.

But what Kate and Jack share is a bond of soldiers who have experienced things that mark them and draw them close. Another scene, and one that had me in tears, was so superbly written I had to stop and re-read it.

Opening-Line Mini-Review: Anne Gracie’s GALLANT WAIF | Miss Bates Reads Romance

It involves Jack, his soldier friends, and even Wellington himself. I loved the characters — each and every one of them. Jack was so hurt, so waic to bluster and command, yet so fundamentally kind and loving. And Kate was strong yet vulnerable, quick tempered and intelligent.

Gallant Waif (Harlequin Historical #557)

All of the servants, even the two maids from the village are delightful personages and not simply wallpaper. Whatever you do, please stop by the local bookstore, grocery store or wherever you buy your books and get this.

Then write a letter to Harlequin and demand that whatever Anne Gracie writes be published. She is from Australia where this book was first published and I would hate to see her not get a contract with an American publisher.

For me there have only been a handful wif truly good historical romances so far this year, but I have no qualms in saying that Gallant Waif is going to rank very, very high on my list of the Best Romances for I posted my first ever review on Amazon for this book and I just went back to Amazon for a look at all of the comments including a couple of really scathing one-star reviews.

Here is some of wajf I wrote in August The story of Major Jack Carstairs, recently returned from the Peninsular campaign badly wounded in body and spirit, and Kate Farleigh, who is hiding a shameful secret, is exceptionally well told.

Anne Gracie writes with excellent knowledge of the period and draws her characters exceedingly well. It is very clear that she has done her gqllant and the quality of her prose is excellent. This is a story of high emotion, courage and heroism but never slips into sentimentality.

There is sexual tension without sex scenes and the growing relationship between Jack and Kate is believable and moving. The scene at the ball near the end of the book is one of the most highly charged, emotional and poignant scenes I have ever read in a book of this type — it moved me to tears. Anyway, I think I need to do a re-read and see if I still agree with my review written 18 years ago or whether the ladies who write the one star reviews have valid aaif.

I do recall a great liking for this story and have read most of the books the author has produced since — some better than others.

Save my name, email, and website in this browser for the next time I comment. I heard raves about both books Anne Gracie has had published by Harlequin on our canwetalk discussion list.

Rarely have I been so swayed by a reader comments as I was when I read about Tallie’s Knight her other book. I was so taken that I immediately ordered both at Amazon! Buy Gallant Waif by Anne Gracie: Ellen Micheletti Review Date: April 10, Publication Date: A Sensuality Subtle Book Type: European Historical Romance Gallsnt Tags: Em Wittmann December 11, at 6: Leave A Comment Cancel reply Comment.