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Diffstat (limited to 'sca-java-1.x/branches/sca-java-1.6.2/modules/binding-notification/src/main/java/org/apache/tuscany/sca/binding/notification/NotificationReferenceBindingProvider.java')
| -rw-r--r-- | sca-java-1.x/branches/sca-java-1.6.2/modules/binding-notification/src/main/java/org/apache/tuscany/sca/binding/notification/NotificationReferenceBindingProvider.java | 338 |
1 files changed, 338 insertions, 0 deletions
diff --git a/sca-java-1.x/branches/sca-java-1.6.2/modules/binding-notification/src/main/java/org/apache/tuscany/sca/binding/notification/NotificationReferenceBindingProvider.java b/sca-java-1.x/branches/sca-java-1.6.2/modules/binding-notification/src/main/java/org/apache/tuscany/sca/binding/notification/NotificationReferenceBindingProvider.java new file mode 100644 index 0000000000..c1a8162836 --- /dev/null +++ b/sca-java-1.x/branches/sca-java-1.6.2/modules/binding-notification/src/main/java/org/apache/tuscany/sca/binding/notification/NotificationReferenceBindingProvider.java @@ -0,0 +1,338 @@ +/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.sca.binding.notification;
+
+import java.net.URI;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+
+import javax.servlet.ServletInputStream;
+import javax.servlet.ServletOutputStream;
+
+import org.apache.axiom.om.OMElement;
+import org.apache.tuscany.sca.binding.notification.encoding.Broker;
+import org.apache.tuscany.sca.binding.notification.encoding.BrokerID;
+import org.apache.tuscany.sca.binding.notification.encoding.ConnectionOverride;
+import org.apache.tuscany.sca.binding.notification.encoding.Constants;
+import org.apache.tuscany.sca.binding.notification.encoding.EncodingObject;
+import org.apache.tuscany.sca.binding.notification.encoding.EncodingRegistry;
+import org.apache.tuscany.sca.binding.notification.encoding.EncodingUtils;
+import org.apache.tuscany.sca.binding.notification.encoding.EndpointReference;
+import org.apache.tuscany.sca.binding.notification.encoding.ReplaceBrokerConnection;
+import org.apache.tuscany.sca.binding.notification.encoding.Subscribe;
+import org.apache.tuscany.sca.binding.notification.util.NotificationServlet;
+import org.apache.tuscany.sca.binding.notification.util.URIUtil;
+import org.apache.tuscany.sca.binding.notification.util.NotificationServlet.NotificationServletStreamHandler;
+import org.apache.tuscany.sca.host.http.ServletHost;
+import org.apache.tuscany.sca.interfacedef.Interface;
+import org.apache.tuscany.sca.interfacedef.InterfaceContract;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.invocation.Invoker;
+import org.apache.tuscany.sca.provider.ReferenceBindingProvider;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+import org.apache.tuscany.sca.runtime.RuntimeComponentReference;
+
+/**
+ * The runtime representation of the notification reference binding
+ *
+ * @version $Rev$ $Date$
+ */
+public class NotificationReferenceBindingProvider
+ implements ReferenceBindingProvider, NotificationServletStreamHandler {
+
+ private static final String producerPathBase = "/producer";
+ private NotificationReferenceBindingInvoker invoker;
+ private RuntimeComponentReference reference;
+ private NotificationBinding notificationBinding;
+ private ServletHost servletHost;
+ private NotificationTypeManager ntm;
+ private EncodingRegistry encodingRegistry;
+ private URI notificationType;
+ private URL myUrl;
+ private URL remoteNtmUrl;
+ private boolean started;
+ private NotificationBrokerManager brokerManager;
+
+ private List<SubscriberInfo> subscribers;
+ private String brokerID;
+
+ public NotificationReferenceBindingProvider(NotificationBinding notificationBinding,
+ RuntimeComponent component,
+ RuntimeComponentReference reference,
+ ServletHost servletHost,
+ NotificationTypeManager ntm,
+ EncodingRegistry encodingRegistry,
+ String httpUrl,
+ NotificationBrokerManager brokerManager) {
+ this.invoker = null;
+ this.notificationBinding = notificationBinding;
+ this.reference = reference;
+ this.servletHost = servletHost;
+ this.ntm = ntm;
+ this.encodingRegistry = encodingRegistry;
+ this.notificationType = notificationBinding.getNotificationType();
+ String ntmAddress = notificationBinding.getNtmAddress();
+ String notificationTypePath = URIUtil.getPath(notificationType);
+ try {
+ this.myUrl = new URL(httpUrl + producerPathBase + notificationTypePath);
+ this.remoteNtmUrl = null;
+ if (ntmAddress != null && notificationType != null) {
+ remoteNtmUrl = new URL(ntmAddress + notificationTypePath);
+ }
+ } catch(Exception e) {
+ throw new RuntimeException(e);
+ }
+ this.started = false;
+ this.brokerManager = brokerManager;
+
+ URI uri = URI.create(component.getURI() + "/" + notificationBinding.getName());
+ notificationBinding.setURI(uri.toString());
+ Interface interfaze = reference.getInterfaceContract().getInterface();
+ interfaze.resetDataBinding(OMElement.class.getName());
+ for (Operation operation : interfaze.getOperations()) {
+ operation.setNonBlocking(false);
+ }
+
+ this.subscribers = new ArrayList<SubscriberInfo>();
+ this.brokerID = null;
+ }
+
+ public NotificationBinding getBinding() {
+ return notificationBinding;
+ }
+
+ public URL getURL() {
+ return myUrl;
+ }
+
+ public boolean isStarted() {
+ return started;
+ }
+
+ public void setBrokerID(String brokerID) {
+ this.brokerID = brokerID;
+ }
+
+ public String getBrokerID() {
+ return brokerID;
+ }
+
+ public Invoker createInvoker(Operation operation) {
+ if (invoker == null) {
+ invoker = new NotificationReferenceBindingInvoker(operation, this);
+ }
+ return invoker;
+ }
+
+ public boolean supportsOneWayInvocation() {
+ return false;
+ }
+
+ public InterfaceContract getBindingInterfaceContract() {
+ return reference.getInterfaceContract();
+ }
+
+ public void start() {
+ if (started) {
+ return;
+ }
+
+ brokerManager.referenceProviderStarted(notificationType, this, remoteNtmUrl);
+ started = true;
+ }
+
+ public void stop() {
+ }
+
+ public void deployProducer() {
+ List<URL> consumerList = new ArrayList<URL>();
+ String sequenceType;
+ try {
+ sequenceType = ntm.newProducer(notificationType, myUrl, remoteNtmUrl, consumerList);
+ } catch(Exception e) {
+ throw new RuntimeException(e);
+ }
+ if (Constants.EndConsumers.equals(sequenceType)) {
+ for (URL consumerUrl : consumerList) {
+ addSubscriberUrl(consumerUrl);
+ }
+ } else if (Constants.BrokerConsumers.equals(sequenceType)) {
+ // Pick a broker consumer, for now the first one
+ URL consumerUrl = consumerList.get(0);
+ addSubscriberUrl(consumerUrl);
+ }
+
+ servletHost.addServletMapping(myUrl.toString(), new NotificationServlet(this));
+ }
+
+ public void deployBroker(String brokerID, EndpointReference brokerConsumerEPR, List<EndpointReference> consumerList) {
+ if (brokerConsumerEPR != null) {
+ addSubscriber(brokerConsumerEPR);
+ }
+ if (consumerList != null && !consumerList.isEmpty()) {
+ for (EndpointReference consumerEPR : consumerList) {
+ addSubscriber(consumerEPR);
+ }
+ }
+ setBrokerID(brokerID);
+ servletHost.addServletMapping(myUrl.toString(), new NotificationServlet(this));
+ }
+
+ public void undeployBroker(URL brokerConsumerUrl) {
+ EndpointReference brokerConsumerEpr = EncodingUtils.createEndpointReference(brokerConsumerUrl, getBrokerID());
+ ntm.removeBroker(brokerConsumerEpr, getNeighborBrokerConsumerEprs(), remoteNtmUrl);
+ removeBrokerSubscribers();
+ }
+
+ public void handle(Map<String, String> headers, ServletInputStream istream, int contentLength, ServletOutputStream ostream) {
+
+ try {
+ EncodingObject eo = EncodingUtils.decodeFromStream(encodingRegistry, istream);
+ if (eo instanceof Subscribe) {
+ Subscribe sub = (Subscribe)eo;
+ addSubscriber(sub.getConsumerReference().getReference());
+ } else if (eo instanceof ConnectionOverride) {
+ ConnectionOverride co = (ConnectionOverride)eo;
+ replaceSubscribers(co.getBrokerConsumerReference().getReference());
+ } else if (eo instanceof ReplaceBrokerConnection) {
+ ReplaceBrokerConnection rbc = (ReplaceBrokerConnection)eo;
+ URL removedBrokerConsumerEpr = rbc.getRemovedBroker().getReference().getEndpointAddress().getAddress();
+ if (rbc.getNeighbors() != null) {
+ int choice = rbc.getNeighbors().getBrokerSequence().size() - 1;
+ Broker chosenBroker = rbc.getNeighbors().getBrokerSequence().get(choice);
+ replaceBrokerSubscriber(removedBrokerConsumerEpr,
+ chosenBroker.getBrokerConsumerReference().getReference());
+ brokerManager.replaceConsumersBrokerConnection(notificationType,
+ chosenBroker.getBrokerProducerReference().getReference());
+ } else {
+ replaceBrokerSubscriber(removedBrokerConsumerEpr, null);
+ }
+ } else {
+ throw new RuntimeException("Unknown encoding object");
+ }
+ } catch(Throwable e) {
+ e.printStackTrace();
+ throw new RuntimeException(e);
+ }
+ }
+
+ public synchronized List<SubscriberInfo> getSubscribers() {
+ return subscribers;
+ }
+
+ private void addSubscriberUrl(URL subscriberUrl) {
+ addSubscriber(subscriberUrl, null);
+ }
+
+ private void addSubscriber(EndpointReference subscriberEPR) {
+ BrokerID brokerID = null;
+ if (subscriberEPR.getReferenceProperties() != null) {
+ brokerID = subscriberEPR.getReferenceProperties().getProperty(BrokerID.class);
+ }
+ addSubscriber(subscriberEPR.getEndpointAddress().getAddress(), (brokerID != null ? brokerID.getID() : null));
+ }
+
+ private void addSubscriber(URL address, String brokerID) {
+ synchronized(this) {
+ SubscriberInfo si = new SubscriberInfo(address);
+ si.brokerID = brokerID;
+ if (subscribers == null) {
+ subscribers = new ArrayList<SubscriberInfo>();
+ }
+ subscribers.add(si);
+ }
+ }
+
+ private void replaceSubscribers(EndpointReference brokerConsumerEPR) {
+ synchronized(this) {
+ subscribers = null;
+ }
+ addSubscriber(brokerConsumerEPR);
+ }
+
+ private void replaceBrokerSubscriber(URL removedBrokerConsumerUrl, EndpointReference chosenBrokerConsumerEpr) {
+ synchronized(this) {
+ if (subscribers == null) {
+ throw new RuntimeException("No subscribers");
+ }
+ SubscriberInfo siToRemove = null;
+ for (SubscriberInfo si : subscribers) {
+ if (si.address.equals(removedBrokerConsumerUrl)) {
+ siToRemove = si;
+ }
+ }
+ if (siToRemove == null) {
+ throw new RuntimeException("Can't find info for broker to remove [" + removedBrokerConsumerUrl + "]");
+ }
+ if (!subscribers.remove(siToRemove)) {
+ throw new RuntimeException("Can't remove info for [" + siToRemove.address + "]");
+ }
+ }
+ if (chosenBrokerConsumerEpr != null) {
+ addSubscriber(chosenBrokerConsumerEpr);
+ }
+ }
+
+ private List<EndpointReference> getNeighborBrokerConsumerEprs() {
+ synchronized(this) {
+ if (subscribers == null) {
+ throw new RuntimeException("No subscribers");
+ }
+ List<EndpointReference> neighborBrokerConsumerEprs = new ArrayList<EndpointReference>();
+ for(SubscriberInfo si : subscribers) {
+ if (si.brokerID != null) {
+ neighborBrokerConsumerEprs.add(EncodingUtils.createEndpointReference(si.address, si.brokerID));
+ }
+ }
+
+ return neighborBrokerConsumerEprs;
+ }
+ }
+
+ private void removeBrokerSubscribers() {
+ synchronized(this) {
+ if (subscribers == null) {
+ throw new RuntimeException("No subscribers");
+ }
+ List<SubscriberInfo> sisToRemove = new ArrayList<SubscriberInfo>();
+ for (SubscriberInfo si : subscribers) {
+ if (si.brokerID != null) {
+ sisToRemove.add(si);
+ }
+ }
+ for(SubscriberInfo si : sisToRemove) {
+ if (!subscribers.remove(si)) {
+ throw new RuntimeException("Can't remove broker subscriber [" + si.address + "]");
+ }
+ }
+ }
+ }
+
+ class SubscriberInfo {
+ public URL address;
+ public String brokerID;
+
+ public SubscriberInfo(URL address) {
+ this.address = address;
+ this.brokerID = null;
+ }
+ }
+}
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