flex.messaging.config.ServicesDependencies Maven / Gradle / Ivy
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BlazeDS is the server-based Java remoting and web messaging technology that enables developers to easily connect to back-end distributed data and push data in real-time to Adobe Flex and Adobe AIR applications for more responsive rich Internet application (RIA) experiences.
package flex.messaging.config;
import java.io.File;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Map;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import flex.messaging.LocalizedException;
/**
* Flex 2 MXMLC compiler uses the result of the client configuration parser
* to generate mixin initialization source code to be added to the SWF by
* PreLink. It also requires a list of channel classes to be added as
* dependencies.
*/
public class ServicesDependencies
{
private String xmlInit = "";
private StringBuffer imports = new StringBuffer();
private StringBuffer references = new StringBuffer();
private List channelClasses;
private Map configPaths;
private Map lazyAssociations;
private static final List channel_excludes = new ArrayList();
static
{
channel_excludes.add("redirect-url");
}
public static final boolean traceConfig = (System.getProperty("trace.config") != null);
public ServicesDependencies(String path, String parserClass, String contextRoot)
{
ClientConfiguration config = getClientConfiguration(path, parserClass);
if (config != null)
{
Map importMap = new HashMap();
lazyAssociations = new HashMap();
configPaths = config.getConfigPaths();
xmlInit = codegenXmlInit(config, contextRoot, importMap);
codegenServiceImportsAndReferences(importMap, imports, references);
channelClasses = listChannelClasses(config);
}
}
public Set getLazyAssociations(String destination)
{
if (lazyAssociations == null)
{
lazyAssociations = new HashMap();
}
return (Set)lazyAssociations.get(destination);
}
public void addLazyAssociation(String destination, String associationProp)
{
Set la = getLazyAssociations(destination);
if (la == null)
{
la = new HashSet();
lazyAssociations.put(destination, la);
}
la.add(associationProp);
}
public String getServerConfigXmlInit()
{
return xmlInit;
}
public String getImports()
{
return imports.toString();
}
public String getReferences()
{
return references.toString();
}
public List getChannelClasses()
{
return channelClasses;
}
public void addChannelClass(String className)
{
channelClasses.add(className);
}
public void addConfigPath(String path, long modified)
{
configPaths.put(path, new Long(modified));
}
public Map getConfigPaths()
{
return configPaths;
}
public static ClientConfiguration getClientConfiguration(String path, String parserClass)
{
ClientConfiguration config = new ClientConfiguration();
ConfigurationParser parser = getConfigurationParser(parserClass);
if (parser == null)
{
// "Unable to create a parser to load messaging configuration."
LocalizedException lme = new LocalizedException();
lme.setMessage(10138);
throw lme;
}
LocalFileResolver local = new LocalFileResolver();
parser.parse(path, local, config);
config.addConfigPath(path, new File(path).lastModified());
return config;
}
static ConfigurationParser getConfigurationParser(String className)
{
ConfigurationParser parser = null;
Class parserClass = null;
// Check for Custom Parser Specification
if (className != null)
{
try
{
parserClass = Class.forName(className);
parser = (ConfigurationParser)parserClass.newInstance();
}
catch (Throwable t)
{
if (traceConfig)
{
System.out.println("Could not load services configuration parser as: " + className);
}
}
}
// Try Sun JRE 1.4 / Apache Xalan Based Implementation
if (parser == null)
{
try
{
Class.forName("org.apache.xpath.CachedXPathAPI");
className = "flex.messaging.config.ApacheXPathClientConfigurationParser";
parserClass = Class.forName(className);
parser = (ConfigurationParser)parserClass.newInstance();
}
catch (Throwable t)
{
if (traceConfig)
{
System.out.println("Could not load configuration parser as: " + className);
}
}
}
// Try Sun JRE 1.5 Based Implementation
if (parser == null)
{
try
{
className = "flex.messaging.config.XPathClientConfigurationParser";
parserClass = Class.forName(className);
// double-check, on some systems the above loads but the import classes don't
Class.forName("javax.xml.xpath.XPathExpressionException");
parser = (ConfigurationParser)parserClass.newInstance();
}
catch (Throwable t)
{
if (traceConfig)
{
System.out.println("Could not load configuration parser as: " + className);
}
}
}
if (traceConfig && parser != null)
{
System.out.println("Services Configuration Parser: " + parser.getClass().getName());
}
return parser;
}
private static List listChannelClasses(ServicesConfiguration config)
{
List channelList = new ArrayList();
Iterator it = config.getAllChannelSettings().values().iterator();
while (it.hasNext())
{
ChannelSettings settings = (ChannelSettings)it.next();
String clientType = settings.getClientType();
channelList.add(clientType);
}
return channelList;
}
/**
* emit source code declaration of public var xml:XML (unnamed package), containing ServicesConfiguration as e4x
*/
private String codegenXmlInit(ServicesConfiguration config, String contextRoot, Map serviceImportMap)
{
StringBuffer e4x = new StringBuffer();
e4x.append("\n");
// Add default channels of the application
if (config.getDefaultChannels().size() > 0)
{
e4x.append("\t\n");
for (Iterator chanIter = config.getDefaultChannels().iterator(); chanIter.hasNext();)
{
String id = (String)chanIter.next();
e4x.append("\t\t \n");
}
ClusterSettings defaultCluster = config.getDefaultCluster();
// Do not add the cluster tag if the default cluster does not have
// client side load balancing.
if (defaultCluster != null && !defaultCluster.getURLLoadBalancing())
defaultCluster = null;
for (Iterator servIter = config.getAllServiceSettings().iterator(); servIter.hasNext();)
{
ServiceSettings entry = (ServiceSettings)servIter.next();
// FIXME: Need to find another way to skip BootstrapServices
// Skip services with no message types
/*
String messageTypes = entry.getMessageTypesString();
if (messageTypes == null)
continue;
*/
String serviceType = entry.getId();
e4x.append("\t\n");
for (Iterator destIter = entry.getDestinationSettings().values().iterator(); destIter.hasNext();)
{
DestinationSettings dest = (DestinationSettings) destIter.next();
String destination = dest.getId();
e4x.append("\t\t\n");
// add in the identity properties
ConfigMap metadata = dest.getProperties().getPropertyAsMap("metadata", null);
boolean closePropTag = false;
if (metadata != null)
{
e4x.append("\t\t\t\n\t\t\t\t");
closePropTag = true;
List identities = metadata.getPropertyAsList("identity", null);
if (identities != null)
{
Iterator it = identities.iterator();
while (it.hasNext())
{
Object o = it.next();
String identityName = null;
String undefinedValue = null;
if (o instanceof String)
{
identityName = (String) o;
}
else if (o instanceof ConfigMap)
{
identityName = ((ConfigMap) o).getPropertyAsString("property", null);
undefinedValue = ((ConfigMap) o).getPropertyAsString("undefined-value", null);
}
if (identityName != null)
{
e4x.append("\t\t\t\t\t\n");
closePropTag = true;
}
e4x.append("\t\t\t\t");
e4x.append(itemClass);
e4x.append(" \n");
}
// add in cluster properties
ConfigMap network = dest.getProperties().getPropertyAsMap("network", null);
ConfigMap clusterInfo = null;
ConfigMap pagingInfo = null;
ConfigMap reconnectInfo = null;
if (network != null || defaultCluster != null)
{
if (!closePropTag)
{
e4x.append("\t\t\t\n");
closePropTag = true;
}
e4x.append("\t\t\t\t\n");
if (network != null)
pagingInfo = network.getPropertyAsMap("paging", null);
if (pagingInfo != null)
{
String enabled = pagingInfo.getPropertyAsString("enabled", "false");
e4x.append("\t\t\t\t\t \n");
}
String useTransactions = dest.getProperties().getPropertyAsString("use-transactions", "true");
if (useTransactions.equalsIgnoreCase("false"))
{
if (!closePropTag)
{
e4x.append("\t\t\t\n");
closePropTag = true;
}
e4x.append("\t\t\t\tfalse \n");
}
String autoSyncEnabled = dest.getProperties().getPropertyAsString("auto-sync-enabled", "true");
if (autoSyncEnabled.equalsIgnoreCase("false"))
{
if (!closePropTag)
{
e4x.append("\t\t\t\n");
closePropTag = true;
}
e4x.append("\t\t\t\tfalse \n");
}
if (closePropTag)
{
e4x.append("\t\t\t \n");
}
e4x.append("\t\t\t\n");
for (Iterator chanIter = dest.getChannelSettings().iterator(); chanIter.hasNext();)
{
e4x.append("\t\t\t\t \n");
e4x.append("\t\t \n");
}
e4x.append("\t \n");
}
// channels
e4x.append("\t\n");
String channelType;
for (Iterator chanIter = config.getAllChannelSettings().values().iterator(); chanIter.hasNext();)
{
ChannelSettings chan = (ChannelSettings) chanIter.next();
channelType = chan.getClientType();
serviceImportMap.put(channelType, channelType);
e4x.append("\t\t\n");
e4x.append("\t\t\t\n");
channelProperties(chan.getProperties(), e4x, "\t\t\t\t");
e4x.append("\t\t\t \n");
e4x.append("\t\t \n");
}
e4x.append("\t \n");
e4x.append(" ");
return "\nServerConfig.xml =\n" + e4x.toString() + ";\n";
}
/**
* Process channel properties recursively.
*/
private void channelProperties(ConfigMap properties, StringBuffer buf, String indent)
{
for (Iterator nameIter = properties.propertyNames().iterator(); nameIter.hasNext();)
{
String name = (String)nameIter.next();
Object value = properties.get(name);
if (value instanceof String)
{
if (channel_excludes.contains(name))
continue;
buf.append(indent);
buf.append("<" + name + ">" + ((String)value) + "\n");
}
else if (value instanceof ConfigMap)
{
ConfigMap childProperties = (ConfigMap)value;
buf.append(indent);
buf.append("<" + name + ">\n");
channelProperties(childProperties, buf, indent + "\t");
buf.append(indent);
buf.append("\n");
}
}
}
/**
*
*/
public void codegenServiceAssociations(ConfigMap metadata, StringBuffer e4x, String destination, String relation)
{
List references = metadata.getPropertyAsList(relation, null);
if (references != null)
{
Iterator it = references.iterator();
while (it.hasNext())
{
Object ref = it.next();
if (ref instanceof ConfigMap)
{
ConfigMap refMap = (ConfigMap) ref;
String name = refMap.getPropertyAsString("property", null);
String associatedDestination = refMap.getPropertyAsString("destination", null);
String lazy = refMap.getPropertyAsString("lazy", null);
String loadOnDemand = refMap.getPropertyAsString("load-on-demand", null);
String hierarchicalEvents = refMap.getPropertyAsString("hierarchical-events", null);
String pageSize = refMap.getPropertyAsString("page-size", refMap.getPropertyAsString("pageSize", null));
String pagedUpdates = refMap.getPropertyAsString("paged-updates", null);
String cascade = refMap.getPropertyAsString("cascade", null);
String ordered = refMap.getPropertyAsString("ordered", null);
e4x.append("\t\t\t\t\t<");
e4x.append(relation);
if (lazy != null)
{
e4x.append(" lazy=\"");
e4x.append(lazy);
e4x.append("\"");
if (Boolean.valueOf(lazy.toLowerCase().trim()).booleanValue())
{
addLazyAssociation(destination, name);
}
}
e4x.append(" property=\"");
e4x.append(name);
e4x.append("\" destination=\"");
e4x.append(associatedDestination);
e4x.append("\"");
String readOnly = refMap.getPropertyAsString("read-only", null);
if (readOnly != null && readOnly.equalsIgnoreCase("true"))
{
e4x.append(" read-only=\"true\"");
}
if (loadOnDemand != null && loadOnDemand.equalsIgnoreCase("true"))
e4x.append(" load-on-demand=\"true\"");
if (hierarchicalEvents != null && hierarchicalEvents.equalsIgnoreCase("true"))
e4x.append(" hierarchical-events=\"true\"");
if (pagedUpdates != null)
e4x.append(" paged-updates=\"" + pagedUpdates + "\"");
if (pageSize != null)
e4x.append(" page-size=\"" + pageSize + "\"");
if (cascade != null)
e4x.append(" cascade=\"" + cascade + "\"");
if (ordered != null)
e4x.append(" ordered=\"" + ordered + "\"");
e4x.append("/>\n");
}
}
}
}
/**
* This method will return an import and variable reference for channels specified in the map.
* @param map HashMap containing the client side channel type to be used, typically of the form
* "mx.messaging.channels.XXXXChannel", where the key and value are equal.
* @param imports StringBuffer of the imports needed for the given channel definitions
* @param references StringBuffer of the required references so that these classes will be linked in.
*/
public static void codegenServiceImportsAndReferences(Map map, StringBuffer imports, StringBuffer references)
{
String type;
imports.append("import mx.messaging.config.ServerConfig;\n");
references.append(" // static references for configured channels\n");
for (Iterator chanIter = map.values().iterator(); chanIter.hasNext();)
{
type = (String)chanIter.next();
imports.append("import ");
imports.append(type);
imports.append(";\n");
references.append(" private static var ");
references.append(type.replace('.', '_'));
references.append("_ref:");
references.append(type.substring(type.lastIndexOf(".") +1) +";\n");
}
}
}
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