com.google.gwt.gears.Gears
Group items tagged
1More
call by value and call by reference in java - javatpoint - 0 views
-
There is only call by value in java, not call by reference. If we call a method passing a value, it is known as call by value. The changes being done in the called method, is not affected in the calling method.
1More
Apache Commons Daemon : Java based daemons or services - 0 views
-
"Since 1994, the Java programming language evolved and became a valid tool to develop reliable and performant server applications as opposed to just applets and client applications. The major disadvantage of the Java platform is that still today the only portable way to start a Java application relies on a single point of entry: the public static void main(String[]) method. Having a single-point of entry is a valid solution for client applications, where interactively a user can command to the application to quit (which can terminate the Virtual Machine process at calling the System.exit(int) method), but in those cases where the application is not interactive (server applications) there is currently no portable way to notify the Virtual Machine of its imminent shutdown. A server application written in Java might have to perform several tasks before being able to shutdown the Virtual Machine process. For example in the case of a Servlet container, before the VM process is shut down, sessions might need to be serialized to disk, and web applications need to be destroyed. One common solution to this problem is to create (for example) a ServerSocket and wait for a particular message to be issued. When the message is received, all operations required to shut down the server applications are performed and at the end the System.exit method is called to terminate the Virtual Machine process. This method however, has several disadvantages and risks: In case of a system-wide shutdown, the Virtual Machine process may be shut down directly by the operating system without notifying the running server application. If an attacker finds out the shutdown message to send to the server and discovers a way to send this message, he can easily interrupt the server's operation, bypassing all the security restrictions implemented in the operating system. Most multi-user operating systems already have a way in which server applications are started and stopped. Under Unix based
1More
Some Interview Questions to Hire a Java EE Developer - 18 views
-
Sharjah Pakistani Escorts Sharjah Indian Escorts New Indian Call Girls In Dubai JBR Dubai Sexy Night Indian Call Girls Al Nahda Dubai Sexy Night Pakistani Call Girls Vip Indian Escort In Dubai Pakistani Independent Escorts In Sharjah Desi Call Girls In Dubai New Indian Escort In Sharjah
125More
Organize Projects - Google Web Toolkit - Google Code - 0 views
-
-
-
two ways to approach loading them
-
nclude each module with a separate <script> tag
- ...118 more annotations...
-
Create a top level module XML definition
-
Compile the top level module
-
the second approach will lead to much better end-user performance
-
each module has to be downloaded separately by the end-user's browser
-
each module will contain redundant copies of GWT library
-
conflict with each other during event handling
-
Linkers are divided into three categories, PRE, POST, and PRIMARY
-
one primary linker is run for a compilation
-
everal linkers are provided by Core.gwt.xml, which is automatically inherited by User.gwt.xml.
-
monolithic JavaScript file.
-
cross-site deployment model.
-
standard iframe-based
-
<add-linker name="xs" />
-
The GWT compiler
-
packaging its output with the Linker subsystem
-
responsible for the final packaging of the JavaScript code
-
providing a pluggable bootstrap mechanism
-
re-use an existing Java API for a GWT project,
-
<super-source>
-
"re-root" a source path
-
to emulate part of the JRE not implemented by GWT
-
tells the compiler to add all subfolders of com/example/myproject/jre/
-
to the source path
-
com/google/myproject/gwt/jre/java/util/UUID.java
-
most commonly used elements in the module XML file.
-
<inherits name="
-
herits all the settings from the specified module
-
<entry-point class=
-
Entry points are all compiled into a single codebase
-
when the onModuleLoad() of your first entry point finishes, the next entry point is called immediately.
-
Any number of entry-point classes can be added
-
<source path="
-
resources get copied into the output directory during a GWT compile.
-
client subpackage is implicitly added to the source path
-
<public path="path" />
-
treated as a publicly-accessible resource.
-
resources get copied into the output directory
-
the public subpackage is implicitly added to the public
-
<servlet
-
For RPC, this element loads a servlet class
-
mounted at the specified URL path
-
path=
-
-
class="
-
-
URL path should be absolute
-
@RemoteServiceRelativePath attribute
-
you must configure a WEB-INF/web.xml in your war directory to load any servlets needed.
-
n development mode,
-
<script src="
-
external JavaScrip
-
<stylesheet src="
-
Extends the set of values
-
for an existing client property
-
<replace-with-class>
-
<generate-with-class>
-
<when-property-is
-
three different types of predicates are
-
<when-type-assignable
-
<when-type-is
-
<all>
-
<any>
-
<none>
-
GWT libraries are organized into modules
-
you want to inherit at least the User module
-
contains all the core GWT functionality
-
including the EntryPoint class
-
widgets and panels
-
History feature
-
Internationalization
-
DOM programming, and more
-
Low-level HTTP
-
Use the following syntax to cause an external JavaScript file to be loaded
-
before your module entry point is called.
-
as if you had included it explicitly using the HTML <script
-
loaded before your onModuleLoad() is called.
-
all included scripts will be loaded when your application starts, in the order in which they are declared.
-
associate external CSS files with your module
-
GWT.getModuleBaseURL() + "foo.css" in client code
-
module's public path
-
useful when
-
inheritance makes resource inclusion particularly convenient.
-
If you wish to create a reusable library that relies upon particular stylesheets or JavaScript files, you can be sure that clients
-
see the documentation for FileSet for a general overview
-
<public>
-
<super-source>
-
<source>
-
includes
-
excludes
-
defaultexcludes
-
casesensitive
-
By default, the patterns listed here are excluded.
-
defaultexcludes is true
-
<script src='myApp/myApp.nocache.js'></script>
-
<script> tags always block evaluation of the page
-
<img> tags do not block page evaluation
-
two simultaneous connections
-
The body.onload() event will only fire once all external resources are fetched, including images and frames.
-
GWT selection script
-
like a normal script tag
-
but the compiled script will be fetched asynchronously.
-
Parsing is blocked until externalScriptZero.js is done fetching and evaluating.
-
myApp/myApp.nocache.js completes
-
the compiled scrip
-
(<hashname>.cache.html
-
begins fetching in a hidden IFRAME (this is non-blocking).
-
onModuleLoad() is not called yet, as we're still waiting on externalScriptOne.js
-
body.onload() fires
-
onload='alert("w00t!")
-
-
put the GWT selection script as early as possible
-
because it won't block any other script requests
-
<img> tags are not guaranteed to be done loading when onModuleLoad() is called
-
<script> tags are guaranteed to be done loading when onModuleLoad() is called
-
multiple EntryPoints
-
will all be called in sequence as soon as that module (and the outer document) is ready
-
multiple GWT modules within the same page
-
each module's EntryPoint will be called as soon as both that module and the outer document is ready
-
EntryPoints are not guaranteed to fire at the same time
-
or in the same order
-
in which their selection scripts were specified in the host page
96More
Large scale application development and MVP - Part II - Google Web Toolkit - Google Code - 0 views
-
itself
-
-
@UiHandler("
-
presenter.onAddButtonClicked();
- ...91 more annotations...
-
onAddButtonClicked
-
eventBus.fireEvent(new AddContactEvent());
-
presenter needs to know more about the view
-
view needs to know more about the data model
-
data types are typically homogeneous within column borders
-
ColumnDefinition abstract class
-
houses the any type-specific code (this is the third party mentioned above)
-
ColumnDefinition
-
ColumnDefinition(s) would be created outside of the presenter
-
we can reuse its logic regardless of what view we've attached ourself to
-
update our views such that we can set their ColumnDefinition(s).
-
setColumnDefinitions
-
this.columnDefinitions = columnDefinitions;
-
so that we can pass in
-
a mocked ContactsView instance when testing our ContactsPresenter
-
in our AppController, when we create the ContactsView,
-
new ContactsViewColumnDefinitions().getColumnDefinitions();
-
we can initialize it with the necessary ColumnDefinition(s).
-
contactsView.setColumnDefiniions(
-
-
With our ColumnDefinition(s) we can pass the model untouched.
-
As mentioned above we were previously dumbing down the model into a list of Strings
-
current solution
-
List<String> data
-
display.setData(data);
-
how that data type is rendered.
-
use generics
-
third party that abstracts
-
knowledge of a cell's data type
-
stringing together a list of these classes
-
providing the necessary render()
-
and isClickable()/isSelectable() override
-
ContactsViewColumnDefinitions<ContactDetails>
-
columnDefinitions = new ArrayList<ColumnDefinition<ContactDetails>>()
-
ColumnDefinition<T>
-
ContactsPresenter
-
ContactsViewImpl
-
ColumnDefinition<T> columnDefinition = columnDefinitions.get(j);
-
the presenter can pass the model untouched
-
the view has no rendering code
-
that we would otherwise need to test. And the fun doesn't stop there.
-
presenter.onItemClicked(
-
presenter.onItemSelected
-
ClickEvent
-
cell.getCellIndex()
-
columnDefinition.isClickable()
-
SelectEvent
-
columnDefinition.isSelectable()
-
return shouldFireClickEvent;
-
return shouldFireSelectEvent;
-
respond to user interaction in different ways based upon the cell type that was clicked
-
use them for rendering purposes
-
defining how to interpret user interactions
-
we're going to remove any application state from the ContactsView
-
replace the view's getSelectedRows() with a SelectionModel
-
The SelectionModel is nothing more than a wrapper around a list of model objects.
-
ContactsPresenter holds on to an instance of this class
-
onItemSelected
-
Having the ColumnDefinition create a new widget for each cell is too heavy
-
Replace our FlexTable implementation with an HTML widget
-
calling setHTML()
-
Reduce the event overhead by sinking events on the HTML widget
-
rather than the individual cells
-
update our ContactsView.ui.xml file to use a
-
HTML widget rather than a FlexTable widget.
-
<g:HTML ui:field="contactsTable">
-
Inefficiencies related to inserting new elements via DOM manipulation Overhead associated with sinking events per Widget
-
for each item ask our column definitions to render accordingly
-
each column definition
-
render itself into the StringBuilder
-
rather than passing back a full-on widget
-
calling setHTML on a HTML widget
-
rather than calling setWidget on a FlexTable.
-
This will decrease your load time, especially as your tables start to grow.
-
we're reducing the overhead of sinking events on per-cell widgets
-
instead sinking on a single container
-
ClickEvents are still wired up via our UiHandler annotations
-
get the Element that was clicked on
-
and walk the DOM until we find a parent TableCellElement
-
we can determine the row
-
shouldFirdClickEvent() and shouldFireSelectEvent()
-
to take as a parameter a TableCellElement rather than a HTMLTable.Cell.
-
faster startup times via Code Splitting.
-
runAsync() points
-
split portion of your code is purely segmented
-
not referenced by other parts of the app
-
it will be downloaded and executed at the point that it needs to run
-
Do we really want to download all of that code before the user even logs in?
-
Not really.
-
simply grab the login code, and leave the rest for when we actually need it
-
wrap the code that creates the ContactsView and ContactsPresenter in a runAsync() call
-
as optimizations such as this one become easier and easier to implement.
Remote Online PC Support I Can Rely On - 1 views
1More
Java Training - InterThread Communication - 0 views
-
Inter Thread Communication is one of the distinct facility in multi threading application development of java. In real world Inter Thread communication based applications of java works faster when compared to all the other applications in java. Inter-thread communication is all about making synchronized threads communicate with each other. It is a mechanism in which a thread is paused running in its critical section and another thread is allowed to enter in the same critical section to be executed. It is implemented by following methods of Object class wait() : Tells the calling thread to give up monitor and go to sleep until some other thread enters the same monitor and call notify. Causes current thread to release the lock and wait until either another thread invokes the notify() method or the notifyAll() method for this object, or a specified amount of time has elapsed. The current thread must own this object's monitor.
Tested And Trusted Bookkeeping Service - 1 views
12More
GAME OVER - Java Server Faces | ComeSolveGo - 0 views
-
Almost everything is wrong with the framework
-
Little control over generated HTML
-
While you need basic functionalities, everything is fine. When you need to modify the component (which is configurable, right?) you are facing the problems
- ...8 more annotations...
-
EXTREMELY idiotic thing - because JSF has their famous lifecycle with lots of magic phases, some backing bean getters are called multiple times!
-
Back button problem.
-
Unreadable URLs. JSF always does the POST.
-
JSF is submitting a form on itself so it could call a backing bean method to handle an event. Of course, if you have a request, there is unnecessary repeated initialization, getter calls, postconstruct etc
-
Reusability? Good joke…
-
JSF - you are FIRED!
-
IDE support
-
Development of custom component? No way, extremely complicated. Extensible? In the movie, maybe…
Enjoy An Excellent Bookkeeping Service - 1 views
The Most Excellent Bookkeeping Services - 1 views
1More
shared by Hendy Irawan on 26 Jan 12
- No Cached
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
- No Cached
-
"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."
2More
shared by mahesh 1234 on 23 Dec 13
- No Cached
Features of Java - 0 views
www.javatpoint.com/features-of-java
java Development programming Spring eclipse library framework web
shared by mahesh 1234 on 23 Dec 13
- No Cached
-
There is given many features of java. They are also called java buzzwords. 1.Simple 2.Object-oriented 3.Platform independent 4.Secured 5.Robust 6.Architecture neutral 7.Portable 8.Dynamic 9.Interpreted 10.High Performance 11.Multithreaded 12.Distributed Simple Java is simple in the sense that: syntax is based on C++ (so easier for programmers to learn it after C++).
-
There is given many features of java. They are also called java buzzwords. 1.Simple 2.Object-oriented 3.Platform independent 4.Secured 5.Robust 6.Architecture neutral 7.Portable 8.Dynamic 9.Interpreted 10.High Performance 11.Multithreaded 12.Distributed Simple Java is simple in the sense that: syntax is based on C++ (so easier for programmers to learn it after C++).
19More
untitled - 0 views
-
initWidget(uiBinder.createAndBindUi(this));
-
To inizialize the "menber variable" whith the widget object described in the XML view despription
-
-
uiBinder.createAndBindUi(this)
-
GWT compiler won't actually visit this URL to fetch the file, because a copy of it is baked into the compiler
- ...15 more annotations...
-
@UiField have default visibility
-
UIObject
-
DivElement
-
If your factory method needs arguments, those will be required as attributes.
-
Every widget that is declared in a template is created by a call to GWT.create().
-
@UiConstructor annotation.
-
you can mark your own widgets with
-
CricketScores has no default (zero args) constructor
-
you can define a @UiFactory method on the UiBinder's owner
-
annotate a constructor of CricketScores with @UiConstructor.
-
@UiFactory
-
public class UserDashboard extends Composite { interface MyUiBinder extends UiBinder<Widget, UserDashboard> {} private static MyUiBinder uiBinder = GWT.create(MyUiBinder.class); public UserDashboard() { initWidget(uiBinder.createAndBindUi(this)); }}
-
use several different XML templates for the same view
-
public interface Display
-
methods can be called to fill in attribute values