Package java.util.concurrent.atomic
A small toolkit of classes that support lock-free thread-safe
programming on single variables.
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Package in Java - 0 views
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A package is a group of similar types of classes, interfaces and sub-packages. package can be categorized in two form, built-in package and user-defined package. There are many built-in packages such as java, lang, awt, javax, swing, net, io, util, sql etc. Here, we will have the detailed learning of creating and using user-defined packages.
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shared by Rinav G on 17 Sep 10
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Overview (Java Platform SE 6) - 0 views
download.oracle.com/...index.html
java platform java.util.concurrent.atomic concurrent AutomicInteger
shared by Rinav G on 17 Sep 10
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A small toolkit of classes that support lock-free thread-safe programming on single variables. In essence, the classes in this package extend the notion of volatile values, fields, and array elements to those that also provide an atomic conditional update operation of the form: boolean compareAndSet(expectedValue, updateValue);
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Atomic classes are not general purpose replacements for java.lang.Integer and related classes. They do not define methods such as hashCode and compareTo. (Because atomic variables are expected to be mutated, they are poor choices for hash table keys.)
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The specifications of these methods enable implementations to employ efficient machine-level atomic instructions that are available on contemporary processors.
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java.util.concurrent.atomic Class AtomicInteger java.lang.Object java.lang.Number java.util.concurrent.atomic.AtomicInteger
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An int value that may be updated atomically. See the java.util.concurrent.atomic package specification for description of the properties of atomic variables. An AtomicInteger is used in applications such as atomically incremented counters, and cannot be used as a replacement for an Integer. However, this class does extend Number to allow uniform access by tools and utilities that deal with numerically-based classes.
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int incrementAndGet() Atomically increments by one the current value.
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Package java.util.concurrent.atomic Description A small toolkit of classes that support lock-free thread-safe programming on single variables. In essence, the classes in this Package extend the notion of volatile values, fields, and array elements to those that also provide an atomic conditional update operation of the form: boolean compareAndSet(expectedValue, updateValue);
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shared by Hendy Irawan on 26 Jan 12
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6. Validation, Data Binding, and Type Conversion - Spring Framework - 0 views
static.springsource.org/...validation.html
validation data conversion type converter class spring framework
shared by Hendy Irawan on 26 Jan 12
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"There are pros and cons for considering validation as business logic, and Spring offers a design for validation (and data binding) that does not exclude either one of them. Specifically validation should not be tied to the web tier, should be easy to localize and it should be possible to plug in any validator available. Considering the above, Spring has come up with a Validator interface that is both basic ands eminently usable in every layer of an application. Data binding is useful for allowing user input to be dynamically bound to the domain model of an application (or whatever objects you use to process user input). Spring provides the so-called DataBinder to do exactly that. The Validator and the DataBinder make up the validation package, which is primarily used in but not limited to the MVC framework. The BeanWrapper is a fundamental concept in the Spring Framework and is used in a lot of places. However, you probably will not have the need to use the BeanWrapper directly. Because this is reference documentation however, we felt that some explanation might be in order. We will explain the BeanWrapper in this chapter since, if you were going to use it at all, you would most likely do so when trying to bind data to objects. Spring's DataBinder and the lower-level BeanWrapper both use PropertyEditors to parse and format property values. The PropertyEditor concept is part of the JavaBeans specification, and is also explained in this chapter. Spring 3 introduces a "core.convert" package that provides a general type conversion facility, as well as a higher-level "format" package for formatting UI field values. These new packages may be used as simpler alternatives to PropertyEditors, and will also be discussed in this chapter."
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shared by Hendy Irawan on 06 Apr 11
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AtomPub interface for Guvnor - JBoss Community - 0 views
community.jboss.org/...AtomPubinterfaceforGuvnor
jbpm drools atompub interface Guvnor REST XML JSON HTTP API Atom
shared by Hendy Irawan on 06 Apr 11
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"http://www.atompub.org/ defines a simple interface over HTTP to publish and subscribe to artifacts (files) and collections of artifacts (services/packages). AtomPub interface serves following purposes: 1: provide "feeds" for people/systems to monitor for changes: For example, user subscribes to a feed which lists contents of package or user subscribes to feed which lists changed contents in a package 2. provide the default remote api to push/pull content and meta data from the repository. This allows other applications to integrate with Guvnor by accessing repository content via atom pub programmatically."
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1. Working with Spring Data Repositories - 0 views
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Typically, your repository interface will extend Repository, CrudRepository or PagingAndSortingRepository. Alternatively, if you do not want to extend Spring Data interfaces, you can also annotate your repository interface with @RepositoryDefinition
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It allows quick query definition by method names but also custom-tuning of these queries by introducing declared queries as needed.
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CREATE_IF_NOT_FOUND (default)CREATE_IF_NOT_FOUND combines CREATE and USE_DECLARED_QUERY.
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the first By acts as delimiter to indicate the start of the actual criteria
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The mechanism strips the prefixes find…By, read…By, and get…By from the method and starts parsing the rest of it
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you can define conditions on entity properties and concatenate them with And and Or
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The introducing clause can contain further expressions such as a Distinct to set a distinct flag
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List<Person> findByEmailAddressAndLastname(EmailAddress emailAddress, String lastname); // Enables the distinct flag for the query List<Person> findDistinctPeopleByLastnameOrFirstname(String lastname, String firstname); List<Person> findPeopleDistinctByLastnameOrFirstname(String lastname, String firstname); // Enabling ignoring case for an individual property List<Person> findByLastnameIgnoreCase(String lastname); // Enabling ignoring case for all suitable properties List<Person> findByLastnameAndFirstnameAllIgnoreCase(String lastname, String firstname); // Enabling static ORDER BY for a query List<Person> findByLastnameOrderByFirstnameAsc(String lastname); List<Person> findByLastnameOrderByFirstnameDesc(String lastname);
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You can combine property expressions with AND and OR. You also get support for operators such as Between, LessThan, GreaterThan, Like for the property expressions
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AllIgnoreCase
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IgnoreCase
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The resolution algorithm starts with interpreting the entire part (AddressZipCode) as the property and checks the domain class for a property with that name (uncapitalized). If the algorithm succeeds it uses that property. If not, the algorithm splits up the source at the camel case parts from the right side into a head and a tail and tries to find the corresponding property, in our example, AddressZip and Code.
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he infrastructure will recognize certain specific types like Pageable and Sort to apply pagination and sorting to your queries dynamically
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Pageable
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Sort sort
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The first method allows you to pass an org.springframework.data.domain.Pageable instance to the query method to dynamically add paging to your statically defined query. Sorting options are handled through the Pageable instance too
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<repositories base-package="com.acme.repositories" />
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Spring is instructed to scan com.acme.repositories and all its subpackages for interfaces extending Repository or one of its subinterfaces. For each interface found, the infrastructure registers the persistence technology-specific FactoryBean to create the appropriate proxies that handle invocations of the query methods. Each bean is registered under a bean name that is derived from the interface name, so an interface of UserRepository would be registered under userRepository
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This postfix defaults to Impl.Example 1.12. Configuration example<repositories base-package="com.acme.repository" /> <repositories base-package="com.acme.repository" repository-impl-postfix="FooBar" />The first configuration example will try to look up a class com.acme.repository.UserRepositoryImpl to act as custom repository implementation, where the second example will try to lookup com.acme.repository.UserRepositoryFoo
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To exclude an interface that extends Repository from being instantiated as a repository instance, you can either annotate it with @NoRepositoryBean or move it outside of the configured base-package.
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]In general, the integration support is enabled by using the @EnableSpringDataWebSupport annotation in your JavaConfig configuration class.
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@Configuration @EnableWebMvc @EnableSpringDataWebSupport class WebConfiguration { }
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In case you need multiple Pageables or Sorts to be resolved from the request (for multiple tables, for example) you can use Spring's @Qualifier annotation to distinguish one from another
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Spring HATEOAS ships with a representation model class PagedResources that allows enrichting the content of a Page instance with the necessary Page metadata as well as links to let the clients easily navigate the pages.
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Super Csv - A free CSV reader/writer... - 0 views
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best, fastest and most programmer friendly free CSV package for Java. Super Csv's unique features raises the bar and sets a new standard for CSV packages. Super Csv is designed around solid Object-oriented principles, and thus aims to leverage your Object-oriented code, making it easier to write and maintain.
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shared by Hendy Irawan on 05 Apr 11
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Java Tips - Inheritance and the Java Persistence API - 0 views
www.java-tips.org/...e-and-the-java-persistenc.html
JPA EE web java tips inheritance eclipselink glassfish
shared by Hendy Irawan on 05 Apr 11
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"This Tech Tip presents some of the features of inheritance supported in the Java Persistence API. A sample package accompanies the Tech Tip. It demonstrates some of the features discussed in the tip. The examples in the tip are taken from the source code for the sample (which is included in the package). The sample uses an open source reference implementation of Java EE 5 called GlassFish. You can download GlassFish from the GlassFish Community Downloads page."
Find all the classes in the same package - 0 views
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unitsofmeasure - Units of Measurement API - Google Project Hosting - 0 views
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"Units of Measurement API specifies one or more JavaTM packages for the programmatic handling of physical quantities and their expression as numbers of units."
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Maven War plugin - Introduction - 0 views
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"The WAR Plugin is responsible for collecting all artifact dependencies, classes and resources of the web application and packaging them into a web application archive."
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Maven Archiver Plugin JAR WAR Manifest - Reference - 0 views
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"The Maven Archiver is mainly used by plugins to handle packaging. The version numbers referenced in the Since column on this page are the version of the Maven Archiver component - not for any specific plugin. To see which version of Maven Archiver a plugin uses, go to the site for that plugin. "
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Android Tutorial - Javatpoint - 0 views
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Android Tutorial. Android is a software package containing linux based operating system for mobile devices such as tablet computers, smartphones etc, middleware and key mobile applicaitons.
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Equinox Aspects - 0 views
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Aspect-oriented computing is continuing to increase in popularity. The modularity inherent in OSGi and Eclipse offers unique opportunities for managing and applying aspects by supplying them in bundles and directing their application to particular sets of bundles. This incubator work area is dedicated to delivering an integration of aspects and OSGi. The goal is to allow developers to use the Equinox together with AspectJ by combining the benefits of both worlds. Using a load-time weaving extension you are able to add AspectJ aspects to your bundle-based system just by putting them into general OSGi bundles. It does not matter if the pointcuts you defined inside the aspects contain join points that are defined by classes within the same bundle or any other bundle in your installation. The load-time weaving extension will take care that your aspects are woven with the appropriate classes at load-time. To illustrate this lets assume the following situation: You would like to write an aspect that traces something within the JDT plug-ins of Eclipse. Without some kind of load-time aspect weaving you would somehow need to recompile those JDT plug-ins using AJDT (for example) together with your aspect. By using the load-time aspect weaving extension all you need is to implement your aspect and add that bundle to your system. The load-time aspect weaving extension takes care of weaving your aspect with the JDT code as it is loaded. And it doesn't matter if a new JDT is installed by the user later on. The next time your application is started the load-time aspect weaving will take care of weaving your aspect into these bundles as well, if necessary. With this technology is becomes possible to modularize crosscutting concerns across different plug-ins while keeping the idea of separate compilation for bundles. Goals Provide Runtime Modularity and Versioning for Crosscutting Concerns: Aspects are used to implement crosscutting concerns. However such concerns usually compr
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Organize Projects - Google Web Toolkit - Google Code - 0 views
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com.google.gwt.gears.Gears
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two ways to approach loading them
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nclude each module with a separate <script> tag
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Create a top level module XML definition
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Compile the top level module
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the second approach will lead to much better end-user performance
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each module has to be downloaded separately by the end-user's browser
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each module will contain redundant copies of GWT library
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conflict with each other during event handling
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Linkers are divided into three categories, PRE, POST, and PRIMARY
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one primary linker is run for a compilation
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everal linkers are provided by Core.gwt.xml, which is automatically inherited by User.gwt.xml.
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monolithic JavaScript file.
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cross-site deployment model.
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standard iframe-based
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<add-linker name="xs" />
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The GWT compiler
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packaging its output with the Linker subsystem
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responsible for the final packaging of the JavaScript code
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providing a pluggable bootstrap mechanism
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re-use an existing Java API for a GWT project,
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<super-source>
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"re-root" a source path
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to emulate part of the JRE not implemented by GWT
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tells the compiler to add all subfolders of com/example/myproject/jre/
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to the source path
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com/google/myproject/gwt/jre/java/util/UUID.java
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most commonly used elements in the module XML file.
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<inherits name="
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herits all the settings from the specified module
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<entry-point class=
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Entry points are all compiled into a single codebase
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when the onModuleLoad() of your first entry point finishes, the next entry point is called immediately.
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Any number of entry-point classes can be added
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<source path="
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resources get copied into the output directory during a GWT compile.
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client subpackage is implicitly added to the source path
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<public path="path" />
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treated as a publicly-accessible resource.
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resources get copied into the output directory
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the public subpackage is implicitly added to the public
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<servlet
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For RPC, this element loads a servlet class
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mounted at the specified URL path
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path=
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class="
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URL path should be absolute
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@RemoteServiceRelativePath attribute
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you must configure a WEB-INF/web.xml in your war directory to load any servlets needed.
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n development mode,
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<script src="
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external JavaScrip
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<stylesheet src="
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Extends the set of values
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for an existing client property
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<replace-with-class>
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<generate-with-class>
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<when-property-is
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three different types of predicates are
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<when-type-assignable
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<when-type-is
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<all>
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<any>
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<none>
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GWT libraries are organized into modules
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you want to inherit at least the User module
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contains all the core GWT functionality
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including the EntryPoint class
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widgets and panels
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History feature
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Internationalization
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DOM programming, and more
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Low-level HTTP
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Use the following syntax to cause an external JavaScript file to be loaded
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before your module entry point is called.
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as if you had included it explicitly using the HTML <script
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loaded before your onModuleLoad() is called.
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all included scripts will be loaded when your application starts, in the order in which they are declared.
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associate external CSS files with your module
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GWT.getModuleBaseURL() + "foo.css" in client code
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module's public path
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useful when
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inheritance makes resource inclusion particularly convenient.
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If you wish to create a reusable library that relies upon particular stylesheets or JavaScript files, you can be sure that clients
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see the documentation for FileSet for a general overview
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<public>
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<super-source>
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<source>
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includes
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excludes
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defaultexcludes
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casesensitive
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By default, the patterns listed here are excluded.
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defaultexcludes is true
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<script src='myApp/myApp.nocache.js'></script>
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<script> tags always block evaluation of the page
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<img> tags do not block page evaluation
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two simultaneous connections
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The body.onload() event will only fire once all external resources are fetched, including images and frames.
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GWT selection script
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like a normal script tag
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but the compiled script will be fetched asynchronously.
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Parsing is blocked until externalScriptZero.js is done fetching and evaluating.
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myApp/myApp.nocache.js completes
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the compiled scrip
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(<hashname>.cache.html
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begins fetching in a hidden IFRAME (this is non-blocking).
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onModuleLoad() is not called yet, as we're still waiting on externalScriptOne.js
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body.onload() fires
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onload='alert("w00t!")
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put the GWT selection script as early as possible
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because it won't block any other script requests
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<img> tags are not guaranteed to be done loading when onModuleLoad() is called
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<script> tags are guaranteed to be done loading when onModuleLoad() is called
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multiple EntryPoints
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will all be called in sequence as soon as that module (and the outer document) is ready
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multiple GWT modules within the same page
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each module's EntryPoint will be called as soon as both that module and the outer document is ready
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EntryPoints are not guaranteed to fire at the same time
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or in the same order
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in which their selection scripts were specified in the host page
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Commons Exec - Apache Commons Exec - 0 views
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"Executing external processes from Java is a well-known problem area. It is inheriently platform dependent and requires the developer to know and test for platform specific behaviors, for example using cmd.exe on Windows or limited buffer sizes causing deadlocks. The JRE support for this is very limited, albeit better with the new Java SE 1.5 ProcessBuilder class. Reliably executing external processes can also require knowledge of the environment variables before or after the command is executed. In J2SE 1.1-1.4 there is not support for this, since the method, System.getenv(), for retriving environment variables is deprecated. There are currently several different libraries that for their own purposes have implemented frameworks around Runtime.exec() to handle the various issues outlined above. The proposed project should aim at coordinating and learning from these initatives to create and maintain a simple, reusable and well-tested package. Since some of the more problematic platforms are not readily available, it is my hope that the broad Apache community can be a great help."
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Merit Campus|Core Java Topics|Learn Java Programming|core java online training - 0 views
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Core Java Topics - Overview Of Programming With Java, Datatypes, Variables, Operators, Control Statements, Methods - Importance, Array - Overview, Classes, Class Inheritance, Methods Overiding and Overloading, Abstract Class And Methods, Interfaces, Packages and Access Control, final, static and others, Object Oriented Concepts - Revisited, Exceptions, Generics, Strings, Exploring java.lang, Collections Framework, More Utility Classes, Input/Output: Exploring java.io, Other Core Java Topics
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Object Class, Object Class in Java, Object Class Methods, Object Class Tutorial - Javat... - 0 views
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Advantage of OOPs Naming Convention Object and Class Method Overloading Constructor static keyword this keyword Inheritance(IS-A) Aggregation(HAS-A) Method Overriding Covariant Return Type super keyword Instance Initializer block final keyword Runtime Polymorphism Dynamic Binding instanceof operator Abstract class Interface Package Access Modifiers Encapsulation Object class Object Cloning Java Array Call By Value strictfp keyword API Document Command Line Arg
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Command Line Argument, Command Line Argument in Java, Tutorial, Example - Javatpoint - 0 views
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Advantage of OOPs Naming Convention Object and Class Method Overloading Constructor static keyword this keyword Inheritance(IS-A) Aggregation(HAS-A) Method Overriding Covariant Return Type super keyword Instance Initializer block final keyword Runtime Polymorphism Dynamic Binding instanceof operator Abstract class Interface Package Access Modifiers Encapsulation Object class Object Cloning Java Array Call By Value strictfp keyword API Document Command Line Arg