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author | lresende <lresende@13f79535-47bb-0310-9956-ffa450edef68> | 2009-11-11 23:07:37 +0000 |
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committer | lresende <lresende@13f79535-47bb-0310-9956-ffa450edef68> | 2009-11-11 23:07:37 +0000 |
commit | 9f395ebf3ec27f89c8dc63137bc99c8d6b0cff6d (patch) | |
tree | 34231d72966aa918e80eea15602b6870d8b21641 /sca-java-1.x/branches/sca-java-1.2/modules/binding-notification/src/main/java/org/apache/tuscany/sca/binding/notification/NotificationReferenceBindingProvider.java | |
parent | 07b7dfd1a70ba222b899d9813f8c449dbf3b785f (diff) |
Moving 1.x branches
git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@835125 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to 'sca-java-1.x/branches/sca-java-1.2/modules/binding-notification/src/main/java/org/apache/tuscany/sca/binding/notification/NotificationReferenceBindingProvider.java')
-rw-r--r-- | sca-java-1.x/branches/sca-java-1.2/modules/binding-notification/src/main/java/org/apache/tuscany/sca/binding/notification/NotificationReferenceBindingProvider.java | 344 |
1 files changed, 344 insertions, 0 deletions
diff --git a/sca-java-1.x/branches/sca-java-1.2/modules/binding-notification/src/main/java/org/apache/tuscany/sca/binding/notification/NotificationReferenceBindingProvider.java b/sca-java-1.x/branches/sca-java-1.2/modules/binding-notification/src/main/java/org/apache/tuscany/sca/binding/notification/NotificationReferenceBindingProvider.java new file mode 100644 index 0000000000..59ab37b2eb --- /dev/null +++ b/sca-java-1.x/branches/sca-java-1.2/modules/binding-notification/src/main/java/org/apache/tuscany/sca/binding/notification/NotificationReferenceBindingProvider.java @@ -0,0 +1,344 @@ +/* + * 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 representaion 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; + } + } +} |