com.sun.faces.lifecycle.Phase Maven / Gradle / Ivy
/*
* $Id: Phase.java,v 1.12.4.1 2007/08/28 06:01:37 rlubke Exp $
*/
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package com.sun.faces.lifecycle;
import java.util.ListIterator;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.faces.FacesException;
import javax.faces.context.FacesContext;
import javax.faces.event.PhaseEvent;
import javax.faces.event.PhaseId;
import javax.faces.event.PhaseListener;
import javax.faces.lifecycle.Lifecycle;
import com.sun.faces.util.FacesLogger;
import com.sun.faces.util.Timer;
import com.sun.faces.util.Util;
/**
* A Phase is a single step in the processing of a
* JavaServer Faces request throughout its entire {@link javax.faces.lifecycle.Lifecycle}.
* Each Phase performs the required transitions on the state
* information in the {@link FacesContext} associated with this request.
*/
public abstract class Phase {
private static Logger LOGGER = FacesLogger.LIFECYCLE.getLogger();
// ---------------------------------------------------------- Public Methods
/**
* Performs PhaseListener processing and invokes the execute method
* of the Phase.
* @param context the FacesContext for the current request
* @param lifecycle the lifecycle for this request
*/
public void doPhase(FacesContext context,
Lifecycle lifecycle,
ListIterator listeners) {
PhaseEvent event = null;
if (listeners.hasNext()) {
event = new PhaseEvent(context, this.getId(), lifecycle);
}
// start timing - include before and after phase processing
Timer timer = Timer.getInstance();
if (timer != null) {
timer.startTiming();
}
handleBeforePhase(context, listeners, event);
Exception ex = null;
try {
if (!shouldSkip(context)) {
execute(context);
}
} catch (Exception e) {
if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.log(Level.SEVERE,
"jsf.lifecycle.phase.exception",
new Object[]{
this.getId().toString(),
((context.getViewRoot() != null) ? context.getViewRoot().getViewId() : ""),
event});
}
ex = e;
} finally {
handleAfterPhase(context, listeners, event);
// stop timing
if (timer != null) {
timer.stopTiming();
timer.logResult(
"Execution time for phase (including any PhaseListeners) -> "
+ this.getId().toString());
}
}
// handle any exceptions thrown by Phase.execute()
if (ex != null) {
if (!(ex instanceof FacesException)) {
ex = new FacesException(ex);
}
throw (FacesException) ex;
}
}
/**
* Perform all state transitions required by the current phase of the
* request processing {@link javax.faces.lifecycle.Lifecycle} for a
* particular request.
*
* @param context FacesContext for the current request being processed
* @throws FacesException if a processing error occurred while
* executing this phase
*/
public abstract void execute(FacesContext context) throws FacesException;
/**
* @return the current {@link javax.faces.lifecycle.Lifecycle}
* Phase identifier.
*/
public abstract PhaseId getId();
// ------------------------------------------------------- Protected Methods
/**
* Handle afterPhase PhaseListener events.
* @param context the FacesContext for the current request
* @param listenersIterator a ListIterator for the PhaseListeners that need
* to be invoked
* @param event the event to pass to each of the invoked listeners
*/
protected void handleAfterPhase(FacesContext context,
ListIterator listenersIterator,
PhaseEvent event) {
while (listenersIterator.hasPrevious()) {
PhaseListener listener = listenersIterator.previous();
if (this.getId().equals(listener.getPhaseId()) ||
PhaseId.ANY_PHASE.equals(listener.getPhaseId())) {
try {
listener.afterPhase(event);
} catch (Exception e) {
if (LOGGER.isLoggable(Level.WARNING)) {
LOGGER.log(Level.WARNING,
"jsf.lifecycle.phaselistener.exception",
new Object[]{
listener.getClass().getName()
+ ".afterPhase()",
this.getId().toString(),
((context.getViewRoot() != null)
? context.getViewRoot().getViewId()
: ""),
e});
LOGGER.warning(Util.getStackTraceString(e));
return;
}
}
}
}
}
/**
* Handle beforePhase PhaseListener events.
* @param context the FacesContext for the current request
* @param listenersIterator a ListIterator for the PhaseListeners that need
* to be invoked
* @param event the event to pass to each of the invoked listeners
*/
protected void handleBeforePhase(FacesContext context,
ListIterator listenersIterator,
PhaseEvent event) {
while (listenersIterator.hasNext()) {
PhaseListener listener = listenersIterator.next();
if (this.getId().equals(listener.getPhaseId()) ||
PhaseId.ANY_PHASE.equals(listener.getPhaseId())) {
try {
listener.beforePhase(event);
} catch (Exception e) {
if (LOGGER.isLoggable(Level.WARNING)) {
LOGGER.log(Level.WARNING,
"jsf.lifecycle.phaselistener.exception",
new Object[]{
listener.getClass().getName()
+ ".beforePhase()",
this.getId().toString(),
((context.getViewRoot() != null)
? context.getViewRoot().getViewId()
: ""),
e});
LOGGER.warning(Util.getStackTraceString(e));
}
// move the iterator pointer back one
if (listenersIterator.hasPrevious()) {
listenersIterator.previous();
}
return;
}
}
}
}
// --------------------------------------------------------- Private Methods
/**
* @param context the FacesContext for the current request
* @return true if FacesContext.responseComplete()
* or FacesContext.renderResponse() and the phase is not
* RENDER_RESPONSE, otherwise return false
*/
private boolean shouldSkip(FacesContext context) {
if (context.getResponseComplete()) {
return (true);
} else if (context.getRenderResponse() &&
!PhaseId.RENDER_RESPONSE.equals(this.getId())) {
return (true);
} else {
return (false);
}
}
}