1 files changed, 285 insertions, 0 deletions
diff --git a/sca-java-2.x/trunk/modules/endpoint-zookeeper/src/main/java/org/apache/tuscany/sca/endpoint/zookeeper/DistributedRegistry.java b/sca-java-2.x/trunk/modules/endpoint-zookeeper/src/main/java/org/apache/tuscany/sca/endpoint/zookeeper/DistributedRegistry.java
new file mode 100644
index 0000000000..b6ec34fe1f
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/endpoint-zookeeper/src/main/java/org/apache/tuscany/sca/endpoint/zookeeper/DistributedRegistry.java
@@ -0,0 +1,285 @@
+/*
+ * 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.endpoint.zookeeper;
+
+import java.io.IOException;
+import java.io.UnsupportedEncodingException;
+import java.net.URLDecoder;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.CopyOnWriteArrayList;
+import java.util.logging.Logger;
+
+import org.apache.tuscany.sca.assembly.Endpoint;
+import org.apache.tuscany.sca.assembly.EndpointReference;
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.core.LifeCycleListener;
+import org.apache.tuscany.sca.runtime.EndpointListener;
+import org.apache.tuscany.sca.runtime.EndpointRegistry;
+import org.apache.tuscany.sca.runtime.RuntimeEndpoint;
+import org.apache.zookeeper.WatchedEvent;
+import org.apache.zookeeper.ZooKeeper;
+import org.oasisopen.sca.ServiceRuntimeException;
+
+/**
+ * 
+ */
+public class DistributedRegistry extends AbstractDistributedMap<Endpoint> implements EndpointRegistry,
+    LifeCycleListener {
+
+    private static final Logger logger = Logger.getLogger(DistributedRegistry.class.getName());
+    private List<EndpointListener> listeners = new CopyOnWriteArrayList<EndpointListener>();
+    private List<EndpointReference> endpointreferences = new CopyOnWriteArrayList<EndpointReference>();
+
+    private ExtensionPointRegistry registry;
+    private String domainURI;
+    private String registryURI;
+
+    /**
+     * 
+     */
+    public DistributedRegistry(ExtensionPointRegistry registry,
+                               Map<String, String> attributes,
+                               String domainRegistryURI,
+                               String domainURI) {
+        super(null, null, null);
+        this.domainURI = domainURI;
+        this.registryURI = domainRegistryURI;
+        Map<String, String> config = parseURI(attributes, domainRegistryURI);
+    }
+
+    public void start() {
+        try {
+            zooKeeper = new ZooKeeper(registryURI, 100, null);
+        } catch (IOException e) {
+            throw new ServiceRuntimeException(e);
+        }
+    }
+
+    public void stop() {
+        if (zooKeeper != null) {
+            try {
+                zooKeeper.close();
+            } catch (InterruptedException e) {
+                throw new ServiceRuntimeException(e);
+            }
+            zooKeeper = null;
+        }
+    }
+
+    private Map<String, String> parseURI(Map<String, String> attributes, String domainRegistryURI) {
+        Map<String, String> map = new HashMap<String, String>();
+        if (attributes != null) {
+            map.putAll(attributes);
+        }
+        // Should be zookeeper:host1:port1,host2:port2?sessionTimeout=100
+        int index = domainRegistryURI.indexOf(':');
+        String path = domainRegistryURI.substring(index + 1);
+
+        index = path.indexOf('?');
+        if (index == -1) {
+            map.put("hosts", path);
+            return map;
+        }
+        map.put("hosts", path.substring(0, index));
+        String query = path.substring(index + 1);
+        try {
+            query = URLDecoder.decode(query, "UTF-8");
+        } catch (UnsupportedEncodingException e) {
+            throw new IllegalArgumentException(e);
+        }
+        String[] params = query.split("&");
+        for (String param : params) {
+            index = param.indexOf('=');
+            if (index != -1) {
+                map.put(param.substring(0, index), param.substring(index + 1));
+            }
+        }
+        return map;
+    }
+
+    public void addEndpoint(Endpoint endpoint) {
+        put(endpoint.getURI(), endpoint);
+        logger.info("Add endpoint - " + endpoint);
+    }
+
+    public void addEndpointReference(EndpointReference endpointReference) {
+        endpointreferences.add(endpointReference);
+        logger.fine("Add endpoint reference - " + endpointReference);
+    }
+
+    public void addListener(EndpointListener listener) {
+        listeners.add(listener);
+    }
+
+    /**
+     * Parse the component/service/binding URI into an array of parts (componentURI, serviceName, bindingName)
+     * @param uri
+     * @return
+     */
+    private String[] parse(String uri) {
+        String[] names = new String[3];
+        int index = uri.lastIndexOf('#');
+        if (index == -1) {
+            names[0] = uri;
+        } else {
+            names[0] = uri.substring(0, index);
+            String str = uri.substring(index + 1);
+            if (str.startsWith("service-binding(") && str.endsWith(")")) {
+                str = str.substring("service-binding(".length(), str.length() - 1);
+                String[] parts = str.split("/");
+                if (parts.length != 2) {
+                    throw new IllegalArgumentException("Invalid service-binding URI: " + uri);
+                }
+                names[1] = parts[0];
+                names[2] = parts[1];
+            } else if (str.startsWith("service(") && str.endsWith(")")) {
+                str = str.substring("service(".length(), str.length() - 1);
+                names[1] = str;
+            } else {
+                throw new IllegalArgumentException("Invalid component/service/binding URI: " + uri);
+            }
+        }
+        return names;
+    }
+
+    private boolean matches(String target, String uri) {
+        String[] parts1 = parse(target);
+        String[] parts2 = parse(uri);
+        for (int i = 0; i < parts1.length; i++) {
+            if (parts1[i] == null || parts1[i].equals(parts2[i])) {
+                continue;
+            } else {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    public List<Endpoint> findEndpoint(EndpointReference endpointReference) {
+        List<Endpoint> foundEndpoints = new ArrayList<Endpoint>();
+
+        logger.fine("Find endpoint for reference - " + endpointReference);
+
+        if (endpointReference.getReference() != null) {
+            Endpoint targetEndpoint = endpointReference.getTargetEndpoint();
+            for (Object v : values()) {
+                Endpoint endpoint = (Endpoint)v;
+                // TODO: implement more complete matching
+                logger.fine("Matching against - " + endpoint);
+                if (matches(targetEndpoint.getURI(), endpoint.getURI())) {
+                    // if (!entry.isPrimary()) {
+                    ((RuntimeEndpoint) endpoint).bind(registry, this);
+                    // }
+                    foundEndpoints.add(endpoint);
+                    logger.fine("Found endpoint with matching service  - " + endpoint);
+                }
+                // else the service name doesn't match
+            }
+        }
+        return foundEndpoints;
+    }
+
+    public List<EndpointReference> findEndpointReference(Endpoint endpoint) {
+        return endpointreferences;
+    }
+
+    public Endpoint getEndpoint(String uri) {
+        return get(uri);
+    }
+
+    public List<EndpointReference> getEndpointRefereneces() {
+        return endpointreferences;
+    }
+
+    public List<Endpoint> getEndpoints() {
+        return new ArrayList<Endpoint>(values());
+    }
+
+    public List<EndpointListener> getListeners() {
+        return listeners;
+    }
+
+    public void removeEndpoint(Endpoint endpoint) {
+        remove(endpoint.getURI());
+        logger.info("Remove endpoint - " + endpoint);
+    }
+
+    public void removeEndpointReference(EndpointReference endpointReference) {
+        endpointreferences.remove(endpointReference);
+        logger.fine("Remove endpoint reference - " + endpointReference);
+    }
+
+    public void removeListener(EndpointListener listener) {
+        listeners.remove(listener);
+    }
+
+    public void updateEndpoint(String uri, Endpoint endpoint) {
+        Endpoint oldEndpoint = getEndpoint(uri);
+        if (oldEndpoint == null) {
+            throw new IllegalArgumentException("Endpoint is not found: " + uri);
+        }
+        put(endpoint.getURI(), endpoint);
+    }
+
+    public void entryAdded(Endpoint value) {
+        ((RuntimeEndpoint) value).bind(registry, this);
+        for (EndpointListener listener : listeners) {
+            listener.endpointAdded(value);
+        }
+    }
+
+    public void entryRemoved(Endpoint value) {
+        for (EndpointListener listener : listeners) {
+            listener.endpointRemoved(value);
+        }
+    }
+
+    public void entryUpdated(Endpoint oldEp, Endpoint newEp) {
+        ((RuntimeEndpoint) newEp).bind(registry, this);
+        for (EndpointListener listener : listeners) {
+            listener.endpointUpdated(oldEp, newEp);
+        }
+    }
+
+    @Override
+    public void process(WatchedEvent event) {
+        super.process(event);
+        String path = event.getPath();
+        if (path == null || !path.startsWith(getPath(root))) {
+            return;
+        }
+        switch (event.getType()) {
+            case NodeChildrenChanged:
+                break;
+            case NodeCreated:
+            case NodeDataChanged:
+                Endpoint ep = getData(path);
+                entryAdded(ep);
+                break;
+            case NodeDeleted:
+                entryRemoved(null);
+                break;
+        }
+    }
+
+}