Example usage for javax.servlet ServletRequestAttributeEvent ServletRequestAttributeEvent

Introduction

In this page you can find the example usage for javax.servlet ServletRequestAttributeEvent ServletRequestAttributeEvent.

Prototype

public ServletRequestAttributeEvent(ServletContext sc, ServletRequest request, String name, Object value) 

Source Link

Document

Construct a ServletRequestAttributeEvent giving the servlet context of this web application, the ServletRequest whose attributes are changing and the name and value of the attribute.

Usage

From source file:org.apache.coyote.tomcat5.CoyoteRequest.java

/**
 * Remove the specified request attribute if it exists.
 *
 * @param name Name of the request attribute to remove
 *//*from   www.j a  va2  s. co  m*/
public void removeAttribute(String name) {
    Object value = null;
    boolean found = false;

    // Remove the specified attribute
    // Check for read only attribute
    // requests are per thread so synchronization unnecessary
    if (readOnlyAttributes.containsKey(name)) {
        return;
    }
    found = attributes.containsKey(name);
    if (found) {
        value = attributes.get(name);
        attributes.remove(name);
    } else {
        return;
    }

    // Notify interested application event listeners
    Object listeners[] = context.getApplicationEventListeners();
    if ((listeners == null) || (listeners.length == 0))
        return;
    ServletRequestAttributeEvent event = new ServletRequestAttributeEvent(context.getServletContext(),
            getRequest(), name, value);
    for (int i = 0; i < listeners.length; i++) {
        if (!(listeners[i] instanceof ServletRequestAttributeListener))
            continue;
        ServletRequestAttributeListener listener = (ServletRequestAttributeListener) listeners[i];
        try {
            listener.attributeRemoved(event);
        } catch (Throwable t) {
            log(sm.getString("coyoteRequest.attributeEvent"), t);
            // Error valve will pick this execption up and display it to user
            attributes.put(Globals.EXCEPTION_ATTR, t);
        }
    }
}

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From source file:org.apache.coyote.tomcat5.CoyoteRequest.java

/**
 * Set the specified request attribute to the specified value.
 *
 * @param name Name of the request attribute to set
 * @param value The associated value/* w  w w .  ja  v a  2 s .  c  o  m*/
 */
public void setAttribute(String name, Object value) {

    // Name cannot be null
    if (name == null)
        throw new IllegalArgumentException(sm.getString("coyoteRequest.setAttribute.namenull"));

    // Null value is the same as removeAttribute()
    if (value == null) {
        removeAttribute(name);
        return;
    }

    if (name.equals(Globals.DISPATCHER_TYPE_ATTR)) {
        dispatcherType = value;
        return;
    } else if (name.equals(Globals.DISPATCHER_REQUEST_PATH_ATTR)) {
        requestDispatcherPath = value;
        return;
    }

    Object oldValue = null;
    boolean replaced = false;

    // Add or replace the specified attribute
    // Check for read only attribute
    // requests are per thread so synchronization unnecessary
    if (readOnlyAttributes.containsKey(name)) {
        return;
    }

    oldValue = attributes.put(name, value);
    if (oldValue != null) {
        replaced = true;
    }

    // Notify interested application event listeners
    Object listeners[] = context.getApplicationEventListeners();
    if ((listeners == null) || (listeners.length == 0))
        return;
    ServletRequestAttributeEvent event = null;
    if (replaced)
        event = new ServletRequestAttributeEvent(context.getServletContext(), getRequest(), name, oldValue);
    else
        event = new ServletRequestAttributeEvent(context.getServletContext(), getRequest(), name, value);

    for (int i = 0; i < listeners.length; i++) {
        if (!(listeners[i] instanceof ServletRequestAttributeListener))
            continue;
        ServletRequestAttributeListener listener = (ServletRequestAttributeListener) listeners[i];
        try {
            if (replaced) {
                listener.attributeReplaced(event);
            } else {
                listener.attributeAdded(event);
            }
        } catch (Throwable t) {
            log(sm.getString("coyoteRequest.attributeEvent"), t);
            // Error valve will pick this execption up and display it to user
            attributes.put(Globals.EXCEPTION_ATTR, t);
        }
    }
}

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From source file:org.ireland.jnetty.http.HttpServletRequestImpl.java

/**
 * Notify interested ServletRequestAttributeListeners that attribute has been assigned a value.
 * /*from  w w  w . j  a v  a 2  s  .co m*/
 * ?
 * 
 */
private void notifyAttributeAdded(String name, Object value) {
    if (_requestAttributeListeners != null && !_requestAttributeListeners.isEmpty()) {
        final ServletRequestAttributeEvent event = new ServletRequestAttributeEvent(servletContext, this, name,
                value);

        for (ServletRequestAttributeListener listener : _requestAttributeListeners) {
            listener.attributeAdded(event);
        }
    }
}

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From source file:org.ireland.jnetty.http.HttpServletRequestImpl.java

/**
 * Notify interested ServletRequestAttributeListeners that attribute has been Replaced.
 * /*from   w ww.j  a v a 2 s  . c  o  m*/
 * ??
 */
private void notifyAttributeReplaced(String name, Object oldValue) {
    if (_requestAttributeListeners != null && !_requestAttributeListeners.isEmpty()) {
        final ServletRequestAttributeEvent event = new ServletRequestAttributeEvent(servletContext, this, name,
                oldValue);

        for (ServletRequestAttributeListener listener : _requestAttributeListeners) {
            listener.attributeReplaced(event);
        }
    }
}

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From source file:org.ireland.jnetty.http.HttpServletRequestImpl.java

/**
 * Notify interested listeners that attribute has been removed. ?
 *//*from www  .  j  a v a 2s.  c o  m*/
private void notifyAttributeRemoved(String name, Object value) {
    if (_requestAttributeListeners != null && !_requestAttributeListeners.isEmpty()) {
        final ServletRequestAttributeEvent event = new ServletRequestAttributeEvent(servletContext, this, name,
                value);

        for (ServletRequestAttributeListener listener : _requestAttributeListeners) {
            listener.attributeRemoved(event);
        }
    }
}

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