Show Configuration.java syntax highlighted
/*
* ====================================================================
*
* Frame2 Open Source License
*
* Copyright (c) 2004-2007 Megatome Technologies. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by
* Megatome Technologies."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Frame2 Project", and "Frame2",
* must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact iamthechad@sourceforge.net.
*
* 5. Products derived from this software may not be called "Frame2"
* nor may "Frame2" appear in their names without prior written
* permission of Megatome Technologies.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL MEGATOME TECHNOLOGIES OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*/
package org.megatome.frame2.front;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.xml.validation.Schema;
import org.megatome.frame2.Frame2Exception;
import org.megatome.frame2.event.Event;
import org.megatome.frame2.event.EventHandler;
import org.megatome.frame2.front.config.EventConfigReader;
import org.megatome.frame2.front.config.EventDef;
import org.megatome.frame2.front.config.EventHandlerDef;
import org.megatome.frame2.front.config.EventMapping;
import org.megatome.frame2.front.config.ExceptionDef;
import org.megatome.frame2.front.config.Forward;
import org.megatome.frame2.front.config.PluginDef;
import org.megatome.frame2.front.config.RequestProcessorDef;
import org.megatome.frame2.front.config.ViewType;
import org.megatome.frame2.plugin.PluginInterface;
/**
* A Configuration populates and holds the data for a Frame2 configuration
* instance. Once the data is loaded, the configuration object acts as a factory
* and cache for the runtime instances of the configuration.
*/
public class Configuration {
/** Token type used when processing forwards */
public static final String XML_TOKEN = "xml"; //$NON-NLS-1$
/** Token type used when processing forwards */
public static final String HTML_TOKEN = "html"; //$NON-NLS-1$
private Map<String, Forward> globalXMLForwards;
private Map<String, Forward> globalHTMLForwards;
private Map<String, EventDef> events;
private Map<String, Schema> schemaMappings;
private Map<String, EventMapping> eventMappings;
private Map<String, EventHandlerDef> eventHandlers;
private List<ExceptionDef> exceptions;
private List<PluginDef> plugins;
private Map<String, List<EventHandlerProxy>> eventHandlerCache = new HashMap<String, List<EventHandlerProxy>>();
private String path;
private Date initTime;
private EventConfigReader reader;
private RequestProcessorDef soapRequestProcessor;
private RequestProcessorDef httpRequestProcessor;
private List<PluginProxy> pluginProxies = null;
/**
* Constructor for Configuration. The configuration will be loaded from the
* file specified with the path, searching through the local classpath.
* @param path The path of the configuration file to load from.
* @throws ConfigException If loading the configuration fails.
*/
public Configuration(String path) throws ConfigException {
this.reader = new EventConfigReader(path);
this.path = path;
processConfig();
}
/**
* Constructor for Configuration. The configuration will be loaded from the
* InputStream
* @param is The InputStream of the configuration file.
* @throws Exception If loading the configuration fails.
*/
public Configuration(InputStream is) throws ConfigException {
this.reader = new EventConfigReader(is);
processConfig();
}
/**
* Process the configuration file.
* @throws ConfigException
*/
private void processConfig() throws ConfigException {
try {
this.reader.execute();
} catch (Frame2Exception e) {
throw new ConfigException(e);
}
this.globalXMLForwards = this.reader.getGlobalXMLForwards();
this.globalHTMLForwards = this.reader.getGlobalHTMLForwards();
this.events = this.reader.getEvents();
this.schemaMappings = this.reader.getSchemaMappings();
this.eventMappings = this.reader.getEventMappings();
this.eventHandlers = this.reader.getEventHandlers();
this.exceptions = this.reader.getExceptions();
this.plugins = this.reader.getPlugins();
loadPluginProxies();
this.soapRequestProcessor = this.reader.getSoapReqProcHandler();
this.httpRequestProcessor = this.reader.getHttpReqProcHandler();
this.initTime = new Date();
}
/**
* Get the path of the configuration file.
* @return Configuration file path
*/
public String getPath() {
return this.path;
}
/**
* Get the time the configuration was initialized
* @return Date
*/
public Date getInitTime() {
return new Date(this.initTime.getTime());
}
/**
* Method getGlobalForwards.
* @return Map
*/
public Map<String, Forward> getGlobalXMLForwards() {
return this.globalXMLForwards;
}
public Map<String, Forward> getGlobalHTMLForwards() {
return this.globalHTMLForwards;
}
/**
* Method getGlobalForwards.
* @return Map
*/
public Forward getGlobalXMLForward(String token) {
return this.globalXMLForwards.get(token);
}
public Forward getGlobalHTMLForward(String token) {
return this.globalHTMLForwards.get(token);
}
/**
* Returns the eventHandlers.
* @return Map
*/
public Map<String, EventHandlerDef> getEventHandlers() {
return this.eventHandlers;
}
/**
* Returns the eventMappings.
* @return Map
*/
public Map<String, EventMapping> getEventMappings() {
return this.eventMappings;
}
/**
* Returns the events.
* @return Map
*/
public Map<String, EventDef> getEvents() {
return this.events;
}
/**
* Returns the exceptions.
* @return Map
*/
public List<ExceptionDef> getExceptions() {
return this.exceptions;
}
public List<PluginDef> getPlugins() {
return this.plugins;
}
public List<PluginProxy> getPluginProxies() {
return this.pluginProxies;
}
private void loadPluginProxies() throws ConfigException {
this.pluginProxies = new ArrayList<PluginProxy>();
for (PluginDef pluginDef : this.plugins) {
PluginInterface plugin = null;
try {
String type = pluginDef.getType();
plugin = (PluginInterface)Class.forName(type).newInstance();
} catch (Exception e) {
throw new ConfigException(e);
}
this.pluginProxies.add(new PluginProxy(pluginDef, plugin));
}
}
public PluginProxy getPluginProxy(String name) {
List<PluginProxy> pluginProxys = getPluginProxies();
for (PluginProxy proxy : pluginProxys) {
if (proxy.getName().equals(name)) {
return proxy;
}
}
return null;
}
/**
* Method getEvent.
* @param eventName
* @return DOCUMENT ME!
* @throws ConfigException DOCUMENT ME!
*/
public EventProxy getEventProxy(String eventName) throws ConfigException {
EventDef eventDef = this.events.get(eventName);
Event event = null;
if (eventDef == null) {
throw new ConfigException("Invalid Event Name: " + eventName); //$NON-NLS-1$
}
try {
String type = eventDef.getType();
if (type != null) {
//event = (Event) getClass().forName(type).newInstance();
event = (Event)Class.forName(type).newInstance();
event.setEventName(eventName);
}
} catch (Exception e) {
throw new ConfigException("Invalid Event ", e); //$NON-NLS-1$
}
return new EventProxy(eventDef, event);
}
/**
* Method getHandlers.
* @param eventName The name of the event for which to get the handlers.
* @return List An ordered list of the event handlers for this event.
*/
public List<EventHandlerProxy> getHandlers(String eventName) throws ConfigException {
if ((eventName == null) || (eventName.length() == 0)
|| (this.events.get(eventName) == null)) {
throw new ConfigException("Invalid event name " + eventName); //$NON-NLS-1$
}
List<EventHandlerProxy> result = this.eventHandlerCache.get(eventName);
if (result == null) {
result = makeHandlers(eventName);
this.eventHandlerCache.put(eventName, result);
}
return result;
}
private List<EventHandlerProxy> makeHandlers(String eventName) throws ConfigException {
List<String> handlerNames = getHandlerNames(eventName);
List<EventHandlerProxy> handlers = null;
handlers = makeHandlers(handlerNames);
return handlers;
}
private List<EventHandlerProxy> makeHandlers(List<String> handlerNames) throws ConfigException {
List<EventHandlerProxy> result = new ArrayList<EventHandlerProxy>();
try {
if (handlerNames != null) {
for (int i = 0; i < handlerNames.size(); i++) {
String handlerName = handlerNames.get(i);
EventHandlerDef handlerDef = this.eventHandlers.get(handlerName);
if (handlerDef == null) {
throw new ConfigException("Handler : " + handlerName //$NON-NLS-1$
+ " is not configured"); //$NON-NLS-1$
}
//EventHandler handler = (EventHandler)
// getClass().forName(handlerDef.getType())
// .newInstance();
EventHandler handler = (EventHandler)Class.forName(
handlerDef.getType()).newInstance();
result.add(new EventHandlerProxy(handlerName, handler,
handlerDef));
}
}
} catch (InstantiationException e) {
throw new ConfigException(e);
} catch (IllegalAccessException e) {
throw new ConfigException(e);
} catch (ClassNotFoundException e) {
throw new ConfigException(e);
}
return result;
}
private List<String> getHandlerNames(String eventName) throws ConfigException {
List<String> handlers = null;
EventMapping mapping = this.eventMappings.get(eventName);
if (mapping != null) {
handlers = mapping.getHandlers();
} else {
throw new ConfigException("No mapping defined for event " //$NON-NLS-1$
+ eventName);
}
return handlers;
}
/**
* Method getDefaultView.
* @param eventName
* @return String
*/
public String getEventMappingView(String eventName, ViewType type)
throws ViewException {
String view = null;
EventMapping eventMapping = getEventMappings().get(eventName);
view = eventMapping.getView(type.toString());
if (view == null) {
throw new ViewException(
"There is no view defined in the config file for EventMapping: " //$NON-NLS-1$
+ eventName);
}
return view;
}
public ForwardProxy resolveForward(EventHandlerProxy handler, String token,
String tokenType) throws ViewException {
// look in local forward first
// then in global forward
Forward fwd = null;
if (tokenType.equals(HTML_TOKEN)) {
fwd = handler.getDefinition().getHTMLForward(token);
} else if (tokenType.equals(XML_TOKEN)) {
fwd = handler.getDefinition().getXMLForward(token);
}
return (fwd == null) ? resolveForward(token, tokenType)
: new ForwardProxy(fwd);
}
public ForwardProxy resolveForward(String token, String tokenType)
throws ViewException {
// global forward
Forward fwd = resolveGlobalForward(token, tokenType);
return new ForwardProxy(fwd);
}
public Forward resolveGlobalForward(String token, String tokenType)
throws ViewException {
// global forward
Forward fwd = null;
if (tokenType.equals(HTML_TOKEN)) {
fwd = getGlobalHTMLForward(token);
} else if (tokenType.equals(XML_TOKEN)) {
fwd = getGlobalXMLForward(token);
}
if (fwd == null) {
throw new ViewException("Error, The forward name " + token //$NON-NLS-1$
+ " does not exist"); //$NON-NLS-1$
}
return fwd;
}
public boolean validateFor(String eventName) throws ConfigException {
return mappingFor(eventName).isValidate();
}
public String inputViewFor(String eventName, String tokenType)
throws ConfigException, ViewException {
String result = mappingFor(eventName).getInputView();
if (result == null) {
throw new ConfigException("No input view for event " + eventName); //$NON-NLS-1$
}
return resolveForward(result, tokenType).getPath();
}
public ForwardProxy cancelViewFor(String eventName, String tokenType)
throws ConfigException, ViewException {
String result = mappingFor(eventName).getCancelView();
if (result == null) {
throw new ConfigException("No cancel view for event " + eventName); //$NON-NLS-1$
}
return resolveForward(result, tokenType);
}
private EventMapping mappingFor(String eventName) throws ConfigException {
EventMapping mapping = this.eventMappings.get(eventName);
if (mapping != null) {
return mapping;
}
throw new ConfigException("No mapping for event " + eventName); //$NON-NLS-1$
}
public ExceptionProxy resolveException(Throwable ex, String tokenType,
ViewType vtype) throws ViewException {
for (ExceptionDef edef : this.exceptions) {
String classtype = edef.getType();
try {
if (Class.forName(classtype).isInstance(ex)) {
String view = edef.getView(vtype.toString());
Forward fwd = resolveGlobalForward(view, tokenType);
return new ExceptionProxy(fwd, edef);
}
} catch (ClassNotFoundException e) { // Not concerned with this
}
}
return null;
}
public String[] rolesfor(String event) throws ConfigException {
final String[] TYPE = new String[0];
EventMapping mapping = mappingFor(event);
if (mapping != null) {
return mapping.getRoles();
}
return TYPE;
}
/**
* Returns the httpRequestProcessor.
* @return RequestProcessorDef
*/
public RequestProcessorDef getHttpRequestProcessor() {
return this.httpRequestProcessor;
}
/**
* Returns the soapRequestProcessor.
* @return RequestProcessorDef
*/
public RequestProcessorDef getSoapRequestProcessor() {
return this.soapRequestProcessor;
}
public Schema getValidatingSchema(final String eventName) {
return this.schemaMappings.get(eventName);
}
}
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