using util event system

pom.xml

@@ -50,5 +50,12 @@
 			<artifactId>camel-jaxb</artifactId>
 			<version>${camel.version}</version>
 		</dependency>
+
+		<dependency>
+			<groupId>org.slf4j</groupId>
+			<artifactId>slf4j-simple</artifactId>
+			<version>1.7.12</version>
+			<scope>runtime</scope>
+		</dependency>
 	</dependencies>
 </project>

src/main/java/info/kwarc/sally4/client/EventBusContext.java

+package info.kwarc.sally4.client;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.util.HashMap;
+import java.util.Map.Entry;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class EventBusContext {
+
+	Logger log = LoggerFactory.getLogger(getClass());
+
+	public EventBusContext() {
+		handlers = new HashMap<Object, EventBusContext.EventHandlers>();
+	}
+
+	static class EventHandlers {
+		HashMap<String, Method> handlerMethods;
+
+		public EventHandlers(Object o) {
+			handlerMethods = new HashMap<String, Method>();
+			for (Method m : o.getClass().getMethods()) {
+				if (m.getAnnotation(Subscribe.class) == null)
+					continue;
+				Class<?> []params = m.getParameterTypes();
+				if (params.length == 0 || params.length > 2)
+					continue;
+				String id = params[0].getCanonicalName();
+				if (params.length == 2)
+					id += "|"+params[1].getCanonicalName();
+				handlerMethods.put(id, m);
+			}
+		}
+
+	}
+
+	HashMap<Object, EventHandlers> handlers;
+
+	public void register(Object o) {
+		handlers.put(o, new EventHandlers(o));
+	}
+
+	public void unregister(Object o) {
+		handlers.remove(o);
+	}
+
+	public void post(Object evt) {
+		post(evt, null);
+	}
+
+	void run(Object o, Method m, Object evt, Object context) {
+		try {
+			if (m.getParameterTypes().length==1) {
+				m.invoke(o, evt);
+			} else {
+				m.invoke(o, evt, context);
+			}
+		} catch (IllegalAccessException e) {
+			log.error("Error in invoking event bus method ", e);
+			e.printStackTrace();
+		} catch (IllegalArgumentException e) {
+			log.error("Error in invoking event bus method ", e);
+			e.printStackTrace();
+		} catch (InvocationTargetException e) {
+			log.error("Error in invoking event bus method ", e);
+			e.printStackTrace();
+		}
+	}
+
+	public void post(Object evt, Object context) {
+		String p1 = evt.getClass().getCanonicalName();
+		String p2 = "";
+		if (context!=null)
+			p2=p1+"|"+context.getClass().getCanonicalName();
+
+		for (Entry<Object, EventBusContext.EventHandlers> entries : handlers.entrySet()) {
+			// contains event without context
+			if (entries.getValue().handlerMethods.containsKey(p1)) {
+				run(entries.getKey(), entries.getValue().handlerMethods.get(p1), evt, context);
+			}
+
+			// contains event with context
+			if (context != null && entries.getValue().handlerMethods.containsKey(p2)) {
+				run(entries.getKey(), entries.getValue().handlerMethods.get(p2), evt, context);
+			}
+
+		}
+	}
+}
\ No newline at end of file

src/main/java/info/kwarc/sally4/client/EventHandler.java

-package info.kwarc.sally4.client;
-
-public interface EventHandler<EvtType> {
-	void run(EvtType evtData);
-}

src/main/java/info/kwarc/sally4/client/EventListener.java

-package info.kwarc.sally4.client;
-
-public class EventListener <EvtType> {
-	public enum Status {
-		Active,
-		Suspended
-	};
-	
-	Status status;
-	
-	EventHandler<EvtType> runner;
-	
-	public EventHandler<EvtType> getRunner() {
-		return runner;
-	}
-	
-	public void setRunner(EventHandler<EvtType> runner) {
-		this.runner = runner;
-	}
-
-	public Status getStatus() {
-		return status;
-	}
-	
-	public void setStatus(Status status) {
-		this.status = status;
-	}
-}

src/main/java/info/kwarc/sally4/client/EventListenerFactory.java

-package info.kwarc.sally4.client;
-
-import info.kwarc.sally4.client.EventListener.Status;
-
-import java.util.HashSet;
-import java.util.Set;
-
-public class EventListenerFactory<EventType> {
-	Set<EventListener<EventType>> listeners;
-	
-	public EventListenerFactory() {
-		listeners = new HashSet<EventListener<EventType>>();
-	}
-	
-	public void emit(EventType t) {
-		for (EventListener<EventType> listener : listeners) {
-			if (listener.getStatus() == Status.Active) {
-				listener.getRunner().run(t);
-			}
-		}
-	}
-	
-	void suspendAll() {
-		for (EventListener<EventType> listener : listeners) {
-			listener.setStatus(Status.Suspended);
-		}
-	}
-	
-	public EventListener<EventType> create(EventHandler<EventType> runner) {		
-		EventListener<EventType> result = create();
-		result.setRunner(runner);
-		return result;
-	}
-	
-	public EventListener<EventType> create() {
-		EventListener<EventType>  result = new EventListener<EventType>();
-		result.setStatus(Status.Active);
-		listeners.add(result);
-		return result;
-	}
-}

src/main/java/info/kwarc/sally4/client/EventListenerList.java

-package info.kwarc.sally4.client;
-
-import info.kwarc.sally4.client.EventListener.Status;
-
-import java.util.ArrayList;
-import java.util.List;
-
-
-public class EventListenerList {
-	List<EventListener<?>> list;
-	
-	public EventListenerList() {
-		list = new ArrayList<EventListener<?>>();
-	}
-	
-	public <T> void addEventHandler(EventListener<T> evt) {
-		list.add(evt);
-	}
-	
-	public void suspendAll() {
-		for (EventListener<?> listener : list) {
-			listener.setStatus(Status.Suspended);
-		}
-	}
-	
-}

src/main/java/info/kwarc/sally4/client/IActionAcceptor.java

-package info.kwarc.sally4.client;
-
-import org.apache.camel.Exchange;
-
-public interface IActionAcceptor <T> {
-	T getEventData();
-	
-	Exchange cloneExchange();
-	void sendBack(Object obj);
-}

src/main/java/info/kwarc/sally4/client/SallyClient.java

 package info.kwarc.sally4.client;
 
-
-
 public interface SallyClient {
 	void registerDocument(String docName, String[] interfaces, TypedCallback<SallyDoc> docCallback);
 }

src/main/java/info/kwarc/sally4/client/SallyDoc.java

 package info.kwarc.sally4.client;
 
-import info.kwarc.sally.comm.core.HeartbeatRequest;
-import info.kwarc.sally.comm.core.HeartbeatResponse;
-import info.kwarc.sally4.client.impl.MessageParser;
+public interface SallyDoc {
 
-import java.io.StringReader;
-import java.lang.reflect.Method;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.List;
+	public abstract EventBusContext getEventBusContext();
 
-import javax.xml.bind.Unmarshaller;
+	void sendEvent(Object obj);
 
-import org.apache.camel.Exchange;
-import org.apache.camel.Processor;
-import org.apache.camel.ProducerTemplate;
-import org.apache.camel.builder.RouteBuilder;
+	<T> T sendRequest(Object obj, Class<T> type);
 
-public class SallyDoc extends RouteBuilder {
+	void stop();
 
-	MessageParser parser;
-	HashSet<String> schemaSet;
-	ProducerTemplate producerTemplate;
-	String inputQueue;
-	String outputQueue;
-
-	EventHandler<IActionAcceptor<HeartbeatRequest>> heartbeatRequestHandler = new EventHandler<IActionAcceptor<HeartbeatRequest>>() {
-		
-		@Override
-		public void run(IActionAcceptor<HeartbeatRequest> evtData) {
-			evtData.sendBack(new HeartbeatResponse());
-		}
-	};
-	
-	public SallyDoc(MessageParser parser, List<String> schemas, String inputQueue, String outputQueue) {
-		this.parser = parser;
-		schemaSet = new HashSet<String>(schemas);
-		messageHandlers = new HashMap<Class<? extends Object>, SallyDoc.EventMessageHandler<?>>();
-		this.inputQueue = inputQueue;
-		this.outputQueue = outputQueue;
-		schemaSet.add("core");
-		addMessageHandler(HeartbeatRequest.class, heartbeatRequestHandler);
-	}
-
-	HashMap<Class<? extends Object>, EventMessageHandler<?>> messageHandlers ;
-
-	public class EventMessageHandler <T> extends EventListenerFactory<IActionAcceptor<T>>{
-	}
-
-	@SuppressWarnings("unchecked")
-	public <T> EventListener<IActionAcceptor<T>> addMessageHandler(Class<T> messageClass, EventHandler<IActionAcceptor<T>> eventRunner) {	
-		EventMessageHandler<T> factory = null;
-
-		if (!messageHandlers.containsKey(messageClass)) {
-			factory = new EventMessageHandler<T>();
-			messageHandlers.put(messageClass, factory);
-		} else {
-			factory =  (EventMessageHandler<T>) messageHandlers.get(messageClass);
-		}
-		return factory.create(eventRunner);
-	}
-
-	Processor unMarshalMessage = new Processor() {
-
-		@Override
-		public void process(Exchange exchange) throws Exception {
-			String xmlMessage = exchange.getIn().getBody(String.class);
-			String msgSchema = MessageParser.getMessageSchema(xmlMessage);
-			if (!schemaSet.contains(msgSchema)) {
-				log.info("Message schema does not match any schema at registration. Ignoring."+msgSchema);
-				return;
-			}
-			Unmarshaller unmarshaller = parser.getUnmarshaller(msgSchema);
-			if (unmarshaller == null) {
-				throw new Exception("No unmarshaller found for schema "+msgSchema);
-			}
-			exchange.getIn().setBody(unmarshaller.unmarshal(new StringReader(xmlMessage)));
-		}
-	};
-
-	Processor marshalMessage = new Processor() {
-
-		@Override
-		public void process(Exchange exchange) throws Exception {
-			exchange.getIn().setBody(parser.marshall(exchange.getIn().getBody()));
-		}
-	};
-	
-	public void sendEvent(Object obj) {
-		producerTemplate.sendBody("direct:sendAlexInOnly",obj);
-	}
-	
-	public <T> T sendRequest(Object obj, Class<T> type) {
-		return producerTemplate.requestBody("direct:sendAlexInOut", obj, type);
-	}
-
-
-	Processor triggerOnMessageHandlers = new Processor() {
-
-		@Override
-		public void process(final Exchange exchange) throws Exception {
-			final Object obj = exchange.getIn().getBody();
-
-			EventMessageHandler<?> evtMsgHandler = messageHandlers.get(obj.getClass());
-			if (evtMsgHandler == null)
-				return;
-
-			Method m = evtMsgHandler.getClass().getMethod("emit", Object.class);
-			m.invoke(evtMsgHandler, new IActionAcceptor<Object>() {
-
-				@Override
-				public Object getEventData() {
-					return obj;
-				}
-
-				@Override
-				public Exchange cloneExchange() {
-					return exchange.copy();
-				}
-
-				@Override
-				public void sendBack(Object obj) {
-					exchange.getIn().setBody(obj);
-				}
-
-			});
-		}
-	};
-
-	@Override
-	public void configure() throws Exception {
-		producerTemplate = getContext().createProducerTemplate();
-		
-		from(inputQueue)
-			.to("log:SallyDocImpl?showHeaders=true")
-			.convertBodyTo(String.class)
-			.process(unMarshalMessage)
-			.process(triggerOnMessageHandlers)
-			.process(marshalMessage)
-			.to("log:SallyDocImpl?showHeaders=true");
-		
-		from("direct:sendAlexInOut")
-			.process(marshalMessage)
-			.inOut(outputQueue)
-			.process(unMarshalMessage);
-
-		from("direct:sendAlexInOnly")
-			.process(marshalMessage)
-			.inOnly(outputQueue);
-
-	}
-
-}
+}
\ No newline at end of file

src/main/java/info/kwarc/sally4/client/Subscribe.java

+package info.kwarc.sally4.client;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.METHOD)
+public @interface Subscribe {
+
+}

src/main/java/info/kwarc/sally4/client/TestSallyClient.java

+package info.kwarc.sally4.client;
+
+import info.kwarc.sally4.client.impl.SallyClientImpl;
+
+public class TestSallyClient {
+
+	public static void main(String[] args) {
+		SallyClient client = new SallyClientImpl("tcp://localhost:61616", "karaf", "karaf");
+		client.registerDocument("blah", new String[] {"frames"}, new TypedCallback<SallyDoc>() {
+
+			@Override
+			public void run(SallyDoc object) {
+			}
+			
+		});
+		
+	}
+	
+}

src/main/java/info/kwarc/sally4/client/impl/MessageParser.java

@@ -49,6 +49,10 @@ public class MessageParser {
 	}
 
 	Logger log;
+	
+	public boolean supportSchema(String schema) {
+		return bundleMappings.containsKey(schema);
+	}
 
 	HashMap<String, MessageMarshallers > bundleMappings = new HashMap<String, MessageMarshallers>();
 

src/main/java/info/kwarc/sally4/client/impl/SallyClientImpl.java

@@ -42,11 +42,11 @@ public class SallyClientImpl extends RouteBuilder implements SallyClient {
 	
 	CamelContext context;
 
-	public SallyClientImpl(String host, String user, String password, MessageParser parser) {
-		this.parser = parser;
+	public SallyClientImpl(String host, String user, String password) {
 		this.host = host;
 		this.user = user;
 		this.password = password;
+		parser = new MessageParser();
 	}
 
 	@Property(name="SallyHost")
@@ -88,6 +88,7 @@ public class SallyClientImpl extends RouteBuilder implements SallyClient {
 
 	@Validate
 	public void start() throws Exception {
+		started = true;
 		context = new DefaultCamelContext();
 
 		ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory(host);
@@ -123,10 +124,10 @@ public class SallyClientImpl extends RouteBuilder implements SallyClient {
 	public SallyDoc registerResponse(RegisterClientResponse response, 
 				@org.apache.camel.Property("schemas") List<String> schemas, 
 				@org.apache.camel.Property("inputQueue") String inputQueue, 
-				@org.apache.camel.Property("callback") TypedCallback<SallyDoc> callback)  throws Exception {
+				@org.apache.camel.Property("callback") TypedCallback<SallyDocImpl> callback)  throws Exception {
 		String outputQueue = "sallyclient:queue:"+response.getSendQueue();
 
-		SallyDoc newDoc = new SallyDoc(parser, schemas, "sallyclient:queue:"+inputQueue, outputQueue);
+		SallyDocImpl newDoc = new SallyDocImpl(parser, schemas, "sallyclient:queue:"+inputQueue, outputQueue);
 		callback.run(newDoc);
 		
 		CamelContext docContext = new DefaultCamelContext();
@@ -150,8 +151,7 @@ public class SallyClientImpl extends RouteBuilder implements SallyClient {
 	public void registerDocument(String docName, String[] schemas, TypedCallback<SallyDoc> callback) {
 		if (!started) {
 			try {
-				context.start();
-				started = true;
+				start();
 			} catch (Exception e) {
 				e.printStackTrace();
 			}

src/main/java/info/kwarc/sally4/client/impl/SallyDocImpl.java

+package info.kwarc.sally4.client.impl;
+
+import info.kwarc.sally.comm.core.HeartbeatRequest;
+import info.kwarc.sally.comm.core.HeartbeatResponse;
+import info.kwarc.sally4.client.EventBusContext;
+import info.kwarc.sally4.client.SallyDoc;
+import info.kwarc.sally4.client.Subscribe;
+
+import java.io.StringReader;
+import java.util.List;
+
+import javax.xml.bind.Unmarshaller;
+
+import org.apache.camel.Exchange;
+import org.apache.camel.Processor;
+import org.apache.camel.ProducerTemplate;
+import org.apache.camel.builder.RouteBuilder;
+import org.apache.camel.impl.DefaultExchange;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class SallyDocImpl extends RouteBuilder implements SallyDoc {
+
+	MessageParser parser;
+	ProducerTemplate producerTemplate;
+	String inputQueue;
+	String outputQueue;
+	EventBusContext busContext;
+	
+	Logger log = LoggerFactory.getLogger(getClass());
+	
+	@Subscribe
+	public void heartbeatRequest(HeartbeatRequest req, DefaultExchange e) {
+		e.getIn().setBody(new HeartbeatResponse());
+	}
+
+	public SallyDocImpl(MessageParser parser, List<String> schemas, String inputQueue, String outputQueue) {
+		this.parser = parser;
+		this.inputQueue = inputQueue;
+		this.outputQueue = outputQueue;
+		busContext = new EventBusContext();
+		for (String schema : schemas) {
+			parser.addCommLibrary(schema);
+		}
+		busContext.register(this);
+	}
+	
+	/* (non-Javadoc)
+	 * @see info.kwarc.sally4.client.SallyDoc#getEventBusContext()
+	 */
+	@Override
+	public EventBusContext getEventBusContext() {
+		return busContext;
+	}
+
+	Processor unMarshalMessage = new Processor() {
+
+		@Override
+		public void process(Exchange exchange) throws Exception {
+			String xmlMessage = exchange.getIn().getBody(String.class);
+			String msgSchema = MessageParser.getMessageSchema(xmlMessage);
+			if (!parser.supportSchema(msgSchema)) {
+				log.info("Message schema does not match any schema at registration. Ignoring."+msgSchema);
+				return;
+			}
+			Unmarshaller unmarshaller = parser.getUnmarshaller(msgSchema);
+			if (unmarshaller == null) {
+				throw new Exception("No unmarshaller found for schema "+msgSchema);
+			}
+			exchange.getIn().setBody(unmarshaller.unmarshal(new StringReader(xmlMessage)));
+		}
+	};
+
+	Processor marshalMessage = new Processor() {
+
+		@Override
+		public void process(Exchange exchange) throws Exception {
+			exchange.getIn().setBody(parser.marshall(exchange.getIn().getBody()));
+		}
+	};
+	
+	@Override
+	public void stop() {
+		try {
+			getEventBusContext().unregister(this);
+			getContext().stop();
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+	}
+	
+	@Override
+	public void sendEvent(Object obj) {
+		producerTemplate.sendBody("direct:sendAlexInOnly",obj);
+	}
+	
+	@Override
+	public <T> T sendRequest(Object obj, Class<T> type) {
+		return producerTemplate.requestBody("direct:sendAlexInOut", obj, type);
+	}
+
+
+	Processor triggerOnMessageHandlers = new Processor() {
+
+		@Override
+		public void process(final Exchange exchange) throws Exception {
+			final Object obj = exchange.getIn().getBody();
+			busContext.post(obj, exchange);
+		}
+	};
+
+	@Override
+	public void configure() throws Exception {
+		producerTemplate = getContext().createProducerTemplate();
+		
+		from(inputQueue)
+			.to("log:SallyDocImpl?showHeaders=true")
+			.convertBodyTo(String.class)
+			.process(unMarshalMessage)
+			.process(triggerOnMessageHandlers)
+			.process(marshalMessage)
+			.to("log:SallyDocImpl?showHeaders=true");
+		
+		from("direct:sendAlexInOut")
+			.process(marshalMessage)
+			.inOut(outputQueue)
+			.process(unMarshalMessage);
+
+		from("direct:sendAlexInOnly")
+			.process(marshalMessage)
+			.inOnly(outputQueue);
+
+	}
+
+}