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Components.xml
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Components.xml
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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN" "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd">
<chapter id="components">
<title>Built-in Seam components</title>
<para>
This chapter describes Seam's built-in components, and their
configuration properties. The built-in components will be created even if they
are not listed in your <literal>components.xml</literal> file, but if you need to
override default properties or specify more than one component of a certain type,
<literal>components.xml</literal> is used.
</para>
<para>
Note that you can replace any of the built in components with
your own implementations simply by specifying the name of one
of the built in components on your own class using
<literal>@Name</literal>.
</para>
<section>
<title>Context injection components</title>
<para>
The first set of built in components exist purely to support
injection of various contextual objects. For example, the
following component instance variable would have the Seam
session context object injected:
</para>
<programlisting role="JAVA"><![CDATA[@In private Context sessionContext;]]></programlisting>
<variablelist >
<varlistentry>
<term><literal>org.jboss.seam.core.contexts</literal></term>
<listitem>
<para>
Component that provides access to Seam Context objects, for
example <literal>org.jboss.seam.core.contexts.sessionContext['user']</literal>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>org.jboss.seam.faces.facesContext</literal></term>
<listitem>
<para>
Manager component for the <literal>FacesContext</literal> context
object (not a true Seam context)
</para>
</listitem>
</varlistentry>
</variablelist>
<para>
All of these components are always installed.
</para>
</section>
<section>
<title>JSF-related components</title>
<para>
The following set of components are provided to supplement JSF.
</para>
<variablelist>
<varlistentry>
<term><literal>org.jboss.seam.faces.dateConverter</literal></term>
<listitem>
<para>
Provides a default JSF converter for properties of type
<literal>java.util.Date</literal>.
</para>
<para>
This converter is automatically registered with JSF. It
is provided to save a developer from having to specify
a DateTimeConverter on an input field or page
parameter. By default, it assumes the type to be a date
(as opposed to a time or date plus time) and uses the
short input style adjusted to the Locale of the user.
For Locale.US, the input pattern is mm/DD/yy. However,
to comply with Y2K, the year is changed from two digits
to four (e.g., mm/DD/yyyy).
</para>
<para>
It's possible to override the input pattern globally
using component configuration. Consult the JavaDoc for
this class to see examples.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>org.jboss.seam.faces.facesMessages</literal></term>
<listitem>
<para>
Allows faces success messages to propagate across a browser redirect.
</para>
<itemizedlist>
<listitem>
<para>
<literal>add(FacesMessage facesMessage)</literal> — add
a faces message, which will be displayed during the next render
response phase that occurs in the current conversation.
</para>
</listitem>
<listitem>
<para>
<literal>add(String messageTemplate)</literal> — add
a faces message, rendered from the given message template
which may contain EL expressions.
</para>
</listitem>
<listitem>
<para>
<literal>add(Severity severity, String messageTemplate)</literal> —
add a faces message, rendered from the given message template
which may contain EL expressions.
</para>
</listitem>
<listitem>
<para>
<literal>addFromResourceBundle(String key)</literal> —
add a faces message, rendered from a message template defined
in the Seam resource bundle which may contain EL expressions.
</para>
</listitem>
<listitem>
<para>
<literal>addFromResourceBundle(Severity severity, String key)</literal> —
add a faces message, rendered from a message template defined
in the Seam resource bundle which may contain EL expressions.
</para>
</listitem>
<listitem>
<para>
<literal>clear()</literal> — clear all messages.
</para>
</listitem>
</itemizedlist>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>org.jboss.seam.faces.redirect</literal></term>
<listitem>
<para>
A convenient API for performing redirects with parameters (this
is especially useful for bookmarkable search results screens).
</para>
<itemizedlist>
<listitem>
<para>
<literal>redirect.viewId</literal> — the JSF view id
to redirect to.
</para>
</listitem>
<listitem>
<para>
<literal>redirect.conversationPropagationEnabled</literal> —
determines whether the conversation will propagate across the
redirect.
</para>
</listitem>
<listitem>
<para>
<literal>redirect.parameters</literal> — a map of
request parameter name to value, to be passed in the redirect
request.
</para>
</listitem>
<listitem>
<para>
<literal>execute()</literal> — perform the redirect
immediately.
</para>
</listitem>
<listitem>
<para>
<literal>captureCurrentRequest()</literal> — stores
the view id and request parameters of the current GET
request (in the conversation context), for later use
by calling <literal>execute()</literal>.
</para>
</listitem>
</itemizedlist>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>org.jboss.seam.faces.httpError</literal></term>
<listitem>
<para>
A convenient API for sending HTTP errors.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>org.jboss.seam.ui.renderStampStore</literal></term>
<listitem>
<para>
A component (session-scoped by default) responsible for maintaining a
collection of render stamps. A render stamp is an indicator as to whether a
form which was rendered has been submitted. This store is useful when the
client-side state saving method of JSF is being used because it puts the
determination of whether a form has been posted in the control of the server
rather than in the component tree which is maintained on the client.
</para>
<para>
To unbind this check from the session (which is one of the main design goals
of client-side state saving) an implementation must be provided that stores
the render stamps in the application (valid as long as the application is
running) or the database (valid across server restarts).
</para>
<itemizedlist>
<listitem>
<para>
<literal>maxSize</literal> — The maximum number of stamps
to be kept in the store. Default: 100
</para>
</listitem>
</itemizedlist>
</listitem>
</varlistentry>
</variablelist>
<para>
These components are installed when the class <literal>javax.faces.context.FacesContext</literal>
is available on the classpath.
</para>
</section>
<section>
<title>Utility components</title>
<para>
These components are merely useful.
</para>
<variablelist>
<varlistentry>
<term><literal>org.jboss.seam.core.events</literal></term>
<listitem>
<para>
An API for raising events that can be observed via
<literal>@Observer</literal> methods, or method
bindings in <literal>components.xml</literal>.
</para>
<itemizedlist>
<listitem>
<para>
<literal>raiseEvent(String type)</literal> — raise
an event of a particular type and distribute to all
observers.
</para>
</listitem>
<listitem>
<para>
<literal>raiseAsynchronousEvent(String type)</literal> —
raise an event to be processed asynchronously by the EJB3
timer service.
</para>
</listitem>
<listitem>
<para>
<literal>raiseTimedEvent(String type, ....)</literal> —
schedule an event to be processed asynchronously by the EJB3
timer service.
</para>
</listitem>
<listitem>
<para>
<literal>addListener(String type, String methodBinding)</literal>
— add an observer for a particular event type.
</para>
</listitem>
</itemizedlist>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>org.jboss.seam.core.interpolator</literal></term>
<listitem>
<para>
An API for interpolating the values of JSF EL expressions in
Strings.
</para>
<itemizedlist>
<listitem>
<para>
<literal>interpolate(String template)</literal> — scan
the template for JSF EL expressions of the form <literal>#{...}</literal>
and replace them with their evaluated values.
</para>
</listitem>
</itemizedlist>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>org.jboss.seam.core.expressions</literal></term>
<listitem>
<para>
An API for creating value and method bindings.
</para>
<itemizedlist>
<listitem>
<para>
<literal>createValueBinding(String expression)</literal> — create
a value binding object.
</para>
</listitem>
<listitem>
<para>
<literal>createMethodBinding(String expression)</literal> — create
a method binding object.
</para>
</listitem>
</itemizedlist>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>org.jboss.seam.core.pojoCache</literal></term>
<listitem>
<para>
Manager component for a JBoss Cache <literal>PojoCache</literal>
instance.
</para>
<itemizedlist>
<listitem>
<para>
<literal>pojoCache.cfgResourceName</literal> — the name of
the configuration file. Default to <literal>treecache.xml</literal>.
</para>
</listitem>
</itemizedlist>
</listitem>
</varlistentry>
</variablelist>
<para>
All of these components are always installed.
</para>
</section>
<section>
<title>Components for internationalization and themes</title>
<para>
The next group of components make it easy to build internationalized user interfaces
using Seam.
</para>
<variablelist>
<varlistentry>
<term><literal>org.jboss.seam.core.locale</literal></term>
<listitem>
<para>
The Seam locale.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>org.jboss.seam.international.timezone</literal></term>
<listitem>
<para>
The Seam timezone. The timezone is session scoped.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>org.jboss.seam.core.resourceBundle</literal></term>
<listitem>
<para>
The Seam resource bundle. The resource bundle is stateless. The Seam
resource bundle performs a depth-first search for keys in a list of Java
resource bundles.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>org.jboss.seam.core.resourceLoader</literal></term>
<listitem>
<para>
The resource loader provides access to application resources and resource bundles.
</para>
<itemizedlist>
<listitem>
<para>
<literal>resourceLoader.bundleNames</literal> — the names of
the Java resource bundles to search when the Seam resource bundle is
used. Default to <literal>messages</literal>.
</para>
</listitem>
</itemizedlist>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>org.jboss.seam.international.localeSelector</literal></term>
<listitem>
<para>
Supports selection of the locale either at configuration time,
or by the user at runtime.
</para>
<itemizedlist>
<listitem>
<para>
<literal>select()</literal> — select the specified locale.
</para>
</listitem>
<listitem>
<para>
<literal>localeSelector.locale</literal> — the actual
<literal>java.util.Locale</literal>.
</para>
</listitem>
<listitem>
<para>
<literal>localeSelector.localeString</literal> — the
stringified representation of the locale.
</para>
</listitem>
<listitem>
<para>
<literal>localeSelector.language</literal> — the language for
the specified locale.
</para>
</listitem>
<listitem>
<para>
<literal>localeSelector.country</literal> — the country for
the specified locale.
</para>
</listitem>
<listitem>
<para>
<literal>localeSelector.variant</literal> — the variant for
the specified locale.
</para>
</listitem>
<listitem>
<para>
<literal>localeSelector.supportedLocales</literal> — a list
of <literal>SelectItem</literal>s representing the supported locales
listed in <literal>jsf-config.xml</literal>.
</para>
</listitem>
<listitem>
<para>
<literal>localeSelector.cookieEnabled</literal> — specifies
that the locale selection should be persisted via a cookie.
</para>
</listitem>
</itemizedlist>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>org.jboss.seam.international.timezoneSelector</literal></term>
<listitem>
<para>
Supports selection of the timezone either at configuration time,
or by the user at runtime.
</para>
<itemizedlist>
<listitem>
<para>
<literal>select()</literal> — select the specified locale.
</para>
</listitem>
<listitem>
<para>
<literal>timezoneSelector.timezone</literal> — the actual
<literal>java.util.TimeZone</literal>.
</para>
</listitem>
<listitem>
<para>
<literal>timezoneSelector.timeZoneId</literal> — the
stringified representation of the timezone.
</para>
</listitem>
<listitem>
<para>
<literal>timezoneSelector.cookieEnabled</literal> — specifies
that the timezone selection should be persisted via a cookie.
</para>
</listitem>
</itemizedlist>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>org.jboss.seam.international.messages</literal></term>
<listitem>
<para>
A map containing internationalized messages rendered from message
templates defined in the Seam resource bundle.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>org.jboss.seam.theme.themeSelector</literal></term>
<listitem>
<para>
Supports selection of the theme either at configuration time,
or by the user at runtime.
</para>
<itemizedlist>
<listitem>
<para>
<literal>select()</literal> — select the specified theme.
</para>
</listitem>
<listitem>
<para>
<literal>theme.availableThemes</literal> — the list of
defined themes.
</para>
</listitem>
<listitem>
<para>
<literal>themeSelector.theme</literal> — the selected
theme.
</para>
</listitem>
<listitem>
<para>
<literal>themeSelector.themes</literal> — a list
of <literal>SelectItem</literal>s representing the defined
themes.
</para>
</listitem>
<listitem>
<para>
<literal>themeSelector.cookieEnabled</literal> — specifies
that the theme selection should be persisted via a cookie.
</para>
</listitem>
</itemizedlist>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>org.jboss.seam.theme.theme</literal></term>
<listitem>
<para>
A map containing theme entries.
</para>
</listitem>
</varlistentry>
</variablelist>
<para>
All of these components are always installed.
</para>
</section>
<section>
<title>Components for controlling conversations</title>
<para>
The next group of components allow control of conversations by the application or
user interface.
</para>
<variablelist>
<varlistentry>
<term><literal>org.jboss.seam.core.conversation</literal></term>
<listitem>
<para>
API for application control of attributes of the current Seam conversation.
</para>
<itemizedlist>
<listitem>
<para>
<literal>getId()</literal> — returns the current conversation id
</para>
</listitem>
<listitem>
<para>
<literal>isNested()</literal> — is the current conversation a
nested conversation?
</para>
</listitem>
<listitem>
<para>
<literal>isLongRunning()</literal> — is the current conversation a
long-running conversation?
</para>
</listitem>
<listitem>
<para>
<literal>getId()</literal> — returns the current conversation id
</para>
</listitem>
<listitem>
<para>
<literal>getParentId()</literal> — returns the conversation id
of the parent conversation
</para>
</listitem>
<listitem>
<para>
<literal>getRootId()</literal> — returns the conversation id
of the root conversation
</para>
</listitem>
<listitem>
<para>
<literal>setTimeout(int timeout)</literal> — sets the timeout
for the current conversation
</para>
</listitem>
<listitem>
<para>
<literal>setViewId(String outcome)</literal> — sets the view id
to be used when switching back to the current conversation from the
conversation switcher, conversation list, or breadcrumbs.
</para>
</listitem>
<listitem>
<para>
<literal>setDescription(String description)</literal> — sets the
description of the current conversation to be displayed in the
conversation switcher, conversation list, or breadcrumbs.
</para>
</listitem>
<listitem>
<para>
<literal>redirect()</literal> — redirect to the last well-defined
view id for this conversation (useful after login challenges).
</para>
</listitem>
<listitem>
<para>
<literal>leave()</literal> — exit the scope of this conversation,
without actually ending the conversation.
</para>
</listitem>
<listitem>
<para>
<literal>begin()</literal> — begin a long-running conversation
(equivalent to <literal>@Begin</literal>).
</para>
</listitem>
<listitem>
<para>
<literal>beginPageflow(String pageflowName)</literal> — begin a
long-running conversation with a pageflow (equivalent to
<literal>@Begin(pageflow="...")</literal>).
</para>
</listitem>
<listitem>
<para>
<literal>end()</literal> — end a long-running conversation
(equivalent to <literal>@End</literal>).
</para>
</listitem>
<listitem>
<para>
<literal>pop()</literal> — pop the conversation stack, returning
to the parent conversation.
</para>
</listitem>
<listitem>
<para>
<literal>root()</literal> — return to the root conversation of
the conversation stack.
</para>
</listitem>
<listitem>
<para>
<literal>changeFlushMode(FlushModeType flushMode)</literal> — change
the flush mode of the conversation.
</para>
</listitem>
</itemizedlist>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>org.jboss.seam.core.conversationList</literal></term>
<listitem>
<para>
Manager component for the conversation list.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>org.jboss.seam.core.conversationStack</literal></term>
<listitem>
<para>
Manager component for the conversation stack (breadcrumbs).
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>org.jboss.seam.faces.switcher</literal></term>
<listitem>
<para>
The conversation switcher.
</para>
</listitem>
</varlistentry>
</variablelist>
<para>
All of these components are always installed.
</para>
</section>
<section>
<title>jBPM-related components</title>
<para>
These components are for use with jBPM.
</para>
<variablelist>
<varlistentry>
<term><literal>org.jboss.seam.pageflow.pageflow</literal></term>
<listitem>
<para>
API control of Seam pageflows.
</para>
<itemizedlist>
<listitem>
<para>
<literal>isInProcess()</literal> — returns <literal>true</literal>
if there is currently a pageflow in process
</para>
</listitem>
<listitem>
<para>
<literal>getProcessInstance()</literal> — returns jBPM
<literal>ProcessInstance</literal> for the current pageflow
</para>
</listitem>
<listitem>
<para>
<literal>begin(String pageflowName)</literal> — begin a pageflow
in the context of the current conversation
</para>
</listitem>
<listitem>
<para>
<literal>reposition(String nodeName)</literal> — reposition the
current pageflow to a particular node
</para>
</listitem>
</itemizedlist>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>org.jboss.seam.bpm.actor</literal></term>
<listitem>
<para>
API for application control of attributes of the jBPM actor associated
with the current session.
</para>
<itemizedlist>
<listitem>
<para>
<literal>setId(String actorId)</literal> — sets the jBPM
actor id of the current user.
</para>
</listitem>
<listitem>
<para>
<literal>getGroupActorIds()</literal> — returns a
<literal>Set</literal> to which jBPM actor ids for the
current users groups may be added.
</para>
</listitem>
</itemizedlist>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>org.jboss.seam.bpm.transition</literal></term>
<listitem>
<para>
API for application control of the jBPM transition for the current
task.
</para>
<itemizedlist>
<listitem>
<para>
<literal>setName(String transitionName)</literal> — sets the
jBPM transition name to be used when the current task is ended
via <literal>@EndTask</literal>.
</para>
</listitem>
</itemizedlist>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>org.jboss.seam.bpm.businessProcess</literal></term>
<listitem>
<para>
API for programmatic control of the association between the
conversation and business process.
</para>
<itemizedlist>
<listitem>
<para>
<literal>businessProcess.taskId</literal> — the id of the task
associated with the current conversation.
</para>
</listitem>
<listitem>
<para>
<literal>businessProcess.processId</literal> — the id of the process
associated with the current conversation.
</para>
</listitem>
<listitem>
<para>
<literal>businessProcess.hasCurrentTask()</literal> — is a task
instance associated with the current conversation?
</para>
</listitem>
<listitem>
<para>
<literal>businessProcess.hasCurrentProcess()</literal> — is a process
instance associated with the current conversation.
</para>
</listitem>
<listitem>
<para>
<literal>createProcess(String name)</literal> — create an
instance of the named process definition and associate it with
the current conversation.
</para>
</listitem>
<listitem>
<para>
<literal>startTask()</literal> — start the task
associated with the current conversation.
</para>
</listitem>
<listitem>
<para>
<literal>endTask(String transitionName)</literal> — end the task
associated with the current conversation.
</para>
</listitem>
<listitem>
<para>
<literal>resumeTask(Long id)</literal> — associate the task with
the given id with the current conversation.
</para>
</listitem>
<listitem>
<para>
<literal>resumeProcess(Long id)</literal> — associate the process
with the given id with the current conversation.
</para>
</listitem>
<listitem>
<para>
<literal>transition(String transitionName)</literal> — trigger
the transition.
</para>
</listitem>
</itemizedlist>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>org.jboss.seam.bpm.taskInstance</literal></term>
<listitem>
<para>
Manager component for the jBPM <literal>TaskInstance</literal>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>org.jboss.seam.bpm.processInstance</literal></term>
<listitem>
<para>
Manager component for the jBPM <literal>ProcessInstance</literal>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>org.jboss.seam.bpm.jbpmContext</literal></term>
<listitem>
<para>
Manager component for an event-scoped <literal>JbpmContext</literal>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>org.jboss.seam.bpm.taskInstanceList</literal></term>
<listitem>
<para>
Manager component for the jBPM task list.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>org.jboss.seam.bpm.pooledTaskInstanceList</literal></term>
<listitem>
<para>
Manager component for the jBPM pooled task list.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>org.jboss.seam.bpm.taskInstanceListForType</literal></term>
<listitem>
<para>
Manager component for the jBPM task lists.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>org.jboss.seam.bpm.pooledTask</literal></term>
<listitem>
<para>
Action handler for pooled task assignment.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>org.jboss.seam.bpm.processInstanceFinder</literal></term>
<listitem>
<para>
Manager for the process instance task list.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>org.jboss.seam.bpm.processInstanceList</literal></term>
<listitem>
<para>
The process instance task list.
</para>
</listitem>
</varlistentry>
</variablelist>
<para>
All of these components are installed whenever the component
<literal>org.jboss.seam.bpm.jbpm</literal> is installed.
</para>
</section>
<section>
<title>Security-related components</title>
<para>
These components relate to web-tier security.
</para>
<variablelist>
<varlistentry>
<term><literal>org.jboss.seam.web.userPrincipal</literal></term>
<listitem>
<para>
Manager component for the current user <literal>Principal</literal>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>org.jboss.seam.web.isUserInRole</literal></term>
<listitem>
<para>
Allows JSF pages to choose to render a control, depending upon
the roles available to the current principal.
<literal><h:commandButton value="edit" rendered="#{isUserInRole['admin']}"/></literal>.
</para>
</listitem>
</varlistentry>
</variablelist>
</section>
<section>
<title>JMS-related components</title>
<para>
These components are for use with managed <literal>TopicPublisher</literal>s
and <literal>QueueSender</literal>s (see below).
</para>
<variablelist>
<varlistentry>
<term><literal>org.jboss.seam.jms.queueSession</literal></term>
<listitem>
<para>
Manager component for a JMS <literal>QueueSession</literal> .
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>org.jboss.seam.jms.topicSession</literal></term>
<listitem>
<para>
Manager component for a JMS <literal>TopicSession</literal> .
</para>
</listitem>
</varlistentry>
</variablelist>
</section>
<section id="components.mail">
<title>Mail-related components</title>
<para>
These components are for use with Seam's Email support
</para>
<variablelist>