+ /**
+ * DOCUMENT ME!
+ */
+ private static final String CONTEXT_KEY = "context";
+
+ /**
+ * DOCUMENT ME!
+ */
+ static final ThreadLocal<SpringComponent> THIS = new ThreadLocal<SpringComponent>();
+
+ /**
+ * DOCUMENT ME!
+ */
+ static final ThreadLocal<Scope> SCOPE = new ThreadLocal<Scope>();
+
+ /**
+ * DOCUMENT ME!
+ */
+ private Properties properties;
+
+ /**
+ * DOCUMENT ME!
+ */
+ private String[] configFiles;
+
+ /**
+ * DOCUMENT ME!
+ */
+ private Map<String, ProvidedInterface> provided;
+
+ /**
+ * DOCUMENT ME!
+ */
+ private Map<RequiredInterface, String> required;
+
+ /**
+ * DOCUMENT ME!
+ */
+ private Map<String, Properties> propertyObjects;
+
+/**
+ * Constructs a spring system.
+ *
+ * @param aName
+ * Name of the system.
+ * @param aConfigFil
+ * Spring config files to read.
+ * @param aProvided
+ * Map of bean name to service descriptor describing the bean
+ * names that the spring config files use for each required
+ * service.
+ * @param aRequired
+ * Map of bean name to service descriptor describing the bean
+ * names that the spring config files use for each required
+ * service.
+ */
+ public SpringComponent(String aName, String[] aConfigFiles,
+ Map<String, ProvidedInterface> aProvided,
+ Map<RequiredInterface, String> aRequired) {
+ super(aName, aProvided.values().toArray(new ProvidedInterface[0]),
+ aRequired.keySet().toArray(new RequiredInterface[0]));
+ properties = new Properties();
+ configFiles = aConfigFiles;
+ provided = aProvided;
+ required = aRequired;
+ propertyObjects = new HashMap<String, Properties>();
+ }
+
+ /**
+ * Must be called to make a property available in the application
+ * context.
+ *
+ * @param aKey Property key.
+ * @param aValue Property value.
+ */
+ public void setProperty(String aKey, String aValue) {
+ properties.put(aKey, aValue);
+ }
+
+ /**
+ * DOCUMENT ME!
+ *
+ * @param aProperties DOCUMENT ME!
+ */
+ public void addProperties(Properties aProperties) {
+ for (Object key : aProperties.keySet()) {
+ setProperty((String) key, aProperties.getProperty((String) key));
+ }
+ }
+
+ /**
+ * DOCUMENT ME!
+ *
+ * @param aBeanname DOCUMENT ME!
+ * @param aProperties DOCUMENT ME!
+ */
+ public void addProperties(String aBeanname, Properties aProperties) {
+ propertyObjects.put(aBeanname, aProperties);
+ }
+
+ /**
+ * DOCUMENT ME!
+ *
+ * @param aBeanname DOCUMENT ME!
+ *
+ * @return DOCUMENT ME!
+ */
+ public Properties getProperties(String aBeanname) {
+ return propertyObjects.get(aBeanname);
+ }
+
+ /**
+ * DOCUMENT ME!
+ *
+ * @param aExternalScope DOCUMENT ME!
+ *
+ * @return DOCUMENT ME!
+ *
+ * @throws SystemAssemblyException DOCUMENT ME!
+ */
+ @Override
+ protected Scope doStart(Scope aExternalScope) {
+ SpringComponent old = THIS.get();
+ Scope oldScope = SCOPE.get();
+ THIS.set(this);
+
+ Scope scope = new DefaultScope(getProvidedInterfaces()
+ .toArray(new ProvidedInterface[0]), aExternalScope);
+ SCOPE.set(scope);
+
+ try {
+ GenericApplicationContext parentContext = new GenericApplicationContext();
+
+ registerRequiredServices(parentContext);
+ registerPropertyObjects(parentContext);
+
+ parentContext.refresh();
+
+ System.out.println("Parent context " + parentContext);
+
+ AbstractApplicationContext context = parseConfigFiles(parentContext);
+
+ context.addBeanFactoryPostProcessor(new PropertySetter(properties));
+ context.refresh();
+
+ exposeProvidedServices(context, aExternalScope);
+
+ scope.put(CONTEXT_KEY, context);
+
+ return scope;
+ } catch (Exception e) {
+ throw new SystemAssemblyException(
+ "Failed to assemble spring system " + getName(), e);
+ } finally {
+ THIS.set(old);
+ SCOPE.set(oldScope);
+ }
+ }
+
+ /**
+ * DOCUMENT ME!
+ *
+ * @param aContext DOCUMENT ME!
+ * @param aScope DOCUMENT ME!
+ *
+ * @throws IllegalArgumentException DOCUMENT ME!
+ */
+ private void exposeProvidedServices(AbstractApplicationContext aContext,
+ Scope aScope) {
+ // Call addService for each provided service.
+ for (String name : provided.keySet()) {
+ Object svc = aContext.getBean(name);
+
+ if (svc == null) {
+ throw new IllegalArgumentException(getQualifiedName()
+ + ": service '" + name + "' is null");
+ }
+
+ addInterface(provided.get(name), svc, aScope);
+ System.out.println("addService " + provided.get(name) + " " + svc);
+ }
+ }
+
+ /**
+ * DOCUMENT ME!
+ *
+ * @param aParentContext DOCUMENT ME!
+ *
+ * @return DOCUMENT ME!
+ */
+ private AbstractApplicationContext parseConfigFiles(
+ GenericApplicationContext aParentContext) {
+ // Parse spring config files
+ return new ClassPathXmlApplicationContext((String[]) configFiles,
+ false, aParentContext);
+ }
+
+ /**
+ * DOCUMENT ME!
+ *
+ * @param aParentContext DOCUMENT ME!
+ */
+ private void registerRequiredServices(
+ GenericApplicationContext aParentContext) {
+ // Register required services in a parent context
+ for (RequiredInterface requiredIntf : getRequiredInterfaces()) {
+ String beanName = required.get(requiredIntf);
+
+ if ((beanName != null) && (beanName.length() > 0)) {
+ ConstructorArgumentValues cargs = new ConstructorArgumentValues();
+ cargs.addGenericArgumentValue(requiredIntf.getName());
+
+ BeanDefinition definition = new RootBeanDefinition(RequiredServiceBean.class,
+ cargs, new MutablePropertyValues());
+ aParentContext.registerBeanDefinition(beanName, definition);
+ } else {
+ // The required interface is not required by the spring config but by the sub-class directly.
+ }
+ }
+ }
+
+ /**
+ * DOCUMENT ME!
+ *
+ * @param aParentContext DOCUMENT ME!
+ */
+ private void registerPropertyObjects(
+ GenericApplicationContext aParentContext) {
+ for (String beanName : propertyObjects.keySet()) {
+ ConstructorArgumentValues cargs = new ConstructorArgumentValues();
+ cargs.addGenericArgumentValue(PropertySetter.createPropertyFile(
+ propertyObjects.get(beanName)));
+
+ BeanDefinition definition = new RootBeanDefinition(ConfiguredProperties.class,
+ cargs, new MutablePropertyValues());
+ aParentContext.registerBeanDefinition(beanName, definition);
+ }
+ }