Start to add an Apache ZooKeeper based SCA domain registry

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@834683 13f79535-47bb-0310-9956-ffa450edef68

6 files changed, 805 insertions, 0 deletions

diff --git a/java/sca/modules/endpoint-zookeeper/META-INF/MANIFEST.MF b/java/sca/modules/endpoint-zookeeper/META-INF/MANIFEST.MF
new file mode 100644
index 0000000000..a60b2ba656
--- /dev/null
+++ b/java/sca/modules/endpoint-zookeeper/META-INF/MANIFEST.MF
@@ -0,0 +1,17 @@
+Manifest-Version: 1.0

+Bundle-Name: Apache Tuscany SCA Tomcat Tribes Based EndPoint Registry

+Created-By: 1.6.0_07 (Sun Microsystems Inc.)

+Bundle-Vendor: The Apache Software Foundation

+Bundle-Version: 2.0.0

+Bundle-ManifestVersion: 2

+Bundle-License: http://www.apache.org/licenses/LICENSE-2.0.txt

+Bundle-Description: Apache Tuscany SCA XSD Model

+Bundle-SymbolicName: org.apache.tuscany.sca.endpoint.tribes

+Bundle-DocURL: http://www.apache.org/

+Bundle-RequiredExecutionEnvironment: J2SE-1.5,JavaSE-1.6

+Import-Package: org.apache.tuscany.sca.assembly;version="2.0.0",

+ org.apache.tuscany.sca.core.assembly.impl;version="2.0.0";scope=internal;resolution:=optional,

+ org.apache.tuscany.sca.core;version="2.0.0",

+ org.apache.tuscany.sca.management;version="2.0.0",

+ org.apache.tuscany.sca.policy;version="2.0.0",

+ org.apache.tuscany.sca.runtime;version="2.0.0"

diff --git a/java/sca/modules/endpoint-zookeeper/pom.xml b/java/sca/modules/endpoint-zookeeper/pom.xml
new file mode 100644
index 0000000000..cd404ab331
--- /dev/null
+++ b/java/sca/modules/endpoint-zookeeper/pom.xml
@@ -0,0 +1,76 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ * 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.
+-->
+<project>
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>org.apache.tuscany.sca</groupId>
+        <artifactId>tuscany-modules</artifactId>
+        <version>2.0-SNAPSHOT</version>
+        <relativePath>../pom.xml</relativePath>
+    </parent>
+    <artifactId>tuscany-endpoint-zookeeper</artifactId>
+    <name>Apache Tuscany SCA Hadoop ZooKeeper Based EndPoint Registry</name>
+
+    <!-- http://issues.apache.org/jira/browse/ZOOKEEPER-224 -->
+    <repositories>
+       <repository>
+            <id>zookeeper.repo</id>
+            <url>http://people.apache.org/~chirino/zk-repo/</url>
+           <releases>
+               <enabled>true</enabled>
+           </releases>
+           <snapshots>
+               <enabled>false</enabled>
+           </snapshots>
+        </repository>     
+    </repositories>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.apache.hadoop.zookeeper</groupId>
+            <artifactId>zookeeper</artifactId>
+            <version>3.2.1</version>
+            <scope>compile</scope>
+        </dependency>
+        <dependency>
+            <groupId>log4j</groupId>
+            <artifactId>log4j</artifactId>
+            <version>1.2.15</version>
+            <scope>runtime</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>com.sun.jmx</groupId>
+                    <artifactId>jmxri</artifactId>
+                </exclusion>
+                <exclusion>
+                    <groupId>com.sun.jdmk</groupId>
+                    <artifactId>jmxtools</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.tuscany.sca</groupId>
+            <artifactId>tuscany-core-spi</artifactId>
+            <version>2.0-SNAPSHOT</version>
+            <scope>compile</scope>
+        </dependency>
+    </dependencies>
+
+</project>
diff --git a/java/sca/modules/endpoint-zookeeper/src/main/java/org/apache/tuscany/sca/endpoint/zookeeper/AbstractDistributedMap.java b/java/sca/modules/endpoint-zookeeper/src/main/java/org/apache/tuscany/sca/endpoint/zookeeper/AbstractDistributedMap.java
new file mode 100644
index 0000000000..94306507ce
--- /dev/null
+++ b/java/sca/modules/endpoint-zookeeper/src/main/java/org/apache/tuscany/sca/endpoint/zookeeper/AbstractDistributedMap.java
@@ -0,0 +1,289 @@
+/*
+ * 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.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.io.ObjectStreamClass;
+import java.io.UnsupportedEncodingException;
+import java.util.AbstractMap;
+import java.util.AbstractSet;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.apache.zookeeper.CreateMode;
+import org.apache.zookeeper.KeeperException;
+import org.apache.zookeeper.WatchedEvent;
+import org.apache.zookeeper.Watcher;
+import org.apache.zookeeper.ZooKeeper;
+import org.apache.zookeeper.KeeperException.Code;
+import org.apache.zookeeper.ZooDefs.Ids;
+import org.apache.zookeeper.data.Stat;
+import org.oasisopen.sca.ServiceRuntimeException;
+
+/**
+ * 
+ */
+public class AbstractDistributedMap<V> extends AbstractMap<String, V> implements Map<String, V>, Watcher {
+    protected ZooKeeper zooKeeper;
+    /**
+     * @param zooKeeper
+     * @param root
+     * @param classLoader
+     */
+    public AbstractDistributedMap(ZooKeeper zooKeeper, String root, ClassLoader classLoader) {
+        super();
+        this.zooKeeper = zooKeeper;
+        this.root = root;
+        this.classLoader = classLoader;
+        // FIXME:
+        this.zooKeeper.register(this);
+    }
+
+    protected ClassLoader classLoader;
+    protected String root;
+
+    @Override
+    public Set<Map.Entry<String, V>> entrySet() {
+        String path = getPath(root);
+        List<String> children = Collections.emptyList();
+        try {
+            try {
+                children = zooKeeper.getChildren(path, false);
+            } catch (KeeperException e) {
+                if (e.code() == Code.NONODE) {
+                    return Collections.emptySet();
+                } else {
+                    throw e;
+                }
+            }
+        } catch (Throwable e) {
+            throw new ServiceRuntimeException(e);
+        }
+        return new EntrySet(children);
+    }
+
+    protected String getName(Object key) {
+        String name = String.valueOf(key);
+        name = name.replace("$", "$$");
+        return name.replace('/', '$');
+    }
+
+    public String getPath(String... uris) {
+        StringBuffer buffer = new StringBuffer();
+        for (String uri : uris) {
+            buffer.append('/').append(getName(uri));
+        }
+        return buffer.toString();
+    }
+
+    private byte[] getBytes(String str) {
+        try {
+            return str.getBytes("UTF-8");
+        } catch (UnsupportedEncodingException e) {
+            throw new IllegalArgumentException(e);
+        }
+    }
+
+    protected byte[] serialize(V value) throws IOException {
+        ByteArrayOutputStream bos = new ByteArrayOutputStream();
+        ObjectOutputStream oos = new ObjectOutputStream(bos);
+        oos.writeObject(value);
+        oos.close();
+        return bos.toByteArray();
+    }
+
+    protected V deserialize(byte[] bytes, final ClassLoader classLoader) throws IOException, ClassNotFoundException {
+        ByteArrayInputStream bis = new ByteArrayInputStream(bytes);
+        ObjectInputStream ois = new ObjectInputStream(bis) {
+            protected Class<?> resolveClass(ObjectStreamClass desc) throws IOException, ClassNotFoundException {
+                ClassLoader loader = classLoader;
+                if (loader == null) {
+                    loader = Thread.currentThread().getContextClassLoader();
+                }
+                try {
+                    return Class.forName(desc.getName(), false, loader);
+                } catch (ClassNotFoundException e) {
+                    return super.resolveClass(desc);
+                }
+            }
+        };
+        return (V)ois.readObject();
+    }
+
+    @Override
+    public V get(Object key) {
+        String path = getPath(root, getName(key));
+        try {
+            Stat stat = new Stat();
+            byte[] data = zooKeeper.getData(path, false, stat);
+            return deserialize(data, classLoader);
+        } catch (KeeperException e) {
+            if (e.code() == Code.NONODE) {
+                return null;
+            } else {
+                throw new ServiceRuntimeException(e);
+            }
+        } catch (Throwable e) {
+            throw new ServiceRuntimeException(e);
+        }
+    }
+
+    @Override
+    public V put(String key, V value) {
+        try {
+            String path = getPath(root, getName(key));
+            Stat stat = new Stat();
+            byte[] data = serialize(value);
+
+            try {
+                byte[] oldData = zooKeeper.getData(path, false, stat);
+                zooKeeper.setData(path, data, -1);
+                return deserialize(oldData, classLoader);
+            } catch (KeeperException e) {
+                if (e.code() == Code.NONODE) {
+                    zooKeeper.create(path, data, Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL);
+                    return null;
+                } else {
+                    throw e;
+                }
+            }
+        } catch (Throwable e) {
+            throw new ServiceRuntimeException(e);
+        }
+
+    }
+
+    @Override
+    public V remove(Object key) {
+        try {
+            String path = getPath(root, getName(key));
+            try {
+                Stat stat = new Stat();
+                byte[] oldData = zooKeeper.getData(path, false, stat);
+                zooKeeper.delete(path, -1);
+                return deserialize(oldData, classLoader);
+            } catch (KeeperException e) {
+                if (e.code() == Code.NONODE) {
+                    return null;
+                } else {
+                    throw e;
+                }
+            }
+        } catch (Throwable e) {
+            throw new ServiceRuntimeException(e);
+        }
+
+    }
+
+    private class MapEntry implements Map.Entry<String, V> {
+        private String key;
+
+        /**
+         * @param key
+         */
+        public MapEntry(String key) {
+            super();
+            this.key = key;
+        }
+
+        public String getKey() {
+            return key;
+        }
+
+        public V getValue() {
+            try {
+                try {
+                    byte[] data = zooKeeper.getData(getPath(root, getName(key)), false, new Stat());
+                    return deserialize(data, classLoader);
+                } catch (KeeperException e) {
+                    if (e.code() == Code.NONODE) {
+                        return null;
+                    } else {
+                        throw e;
+                    }
+                }
+            } catch (Throwable e) {
+                throw new ServiceRuntimeException(e);
+            }
+        }
+
+        public V setValue(V value) {
+            return put(key, value);
+        }
+    }
+
+    private class EntrySet extends AbstractSet<Map.Entry<String, V>> {
+        private final int size;
+        private final Iterator<String> childrenIterator;
+
+        /**
+         * @param size
+         * @param childrenIterator
+         */
+        public EntrySet(Collection<String> children) {
+            super();
+            this.size = children.size();
+            this.childrenIterator = children.iterator();
+        }
+
+        @Override
+        public Iterator<Map.Entry<String, V>> iterator() {
+            return new Iterator<Map.Entry<String, V>>() {
+                private String path;
+
+                public boolean hasNext() {
+                    return childrenIterator.hasNext();
+                }
+
+                public Map.Entry<String, V> next() {
+                    path = childrenIterator.next();
+                    return new MapEntry(path);
+                }
+
+                public void remove() {
+                    childrenIterator.remove();
+                    try {
+                        zooKeeper.delete(path, -1);
+                    } catch (Throwable e) {
+                        throw new ServiceRuntimeException(e);
+                    }
+                }
+            };
+
+        }
+
+        @Override
+        public int size() {
+            return size;
+        }
+    }
+
+    public void process(WatchedEvent event) {
+        System.out.println(event);
+    }
+}
diff --git a/java/sca/modules/endpoint-zookeeper/src/main/java/org/apache/tuscany/sca/endpoint/zookeeper/DistributedRegistry.java b/java/sca/modules/endpoint-zookeeper/src/main/java/org/apache/tuscany/sca/endpoint/zookeeper/DistributedRegistry.java
new file mode 100644
index 0000000000..1e311da0ba
--- /dev/null
+++ b/java/sca/modules/endpoint-zookeeper/src/main/java/org/apache/tuscany/sca/endpoint/zookeeper/DistributedRegistry.java
@@ -0,0 +1,172 @@
+/*
+ * 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.util.List;
+
+import org.apache.tuscany.sca.assembly.Endpoint;
+import org.apache.tuscany.sca.assembly.EndpointReference;
+import org.apache.tuscany.sca.core.LifeCycleListener;
+import org.apache.tuscany.sca.runtime.EndpointListener;
+import org.apache.tuscany.sca.runtime.EndpointRegistry;
+import org.apache.zookeeper.ZooKeeper;
+import org.oasisopen.sca.ServiceRuntimeException;
+
+/**
+ * 
+ */
+public class DistributedRegistry implements EndpointRegistry, LifeCycleListener {
+    private String domainURI;
+    private String registryURI;
+    private ZooKeeper zooKeeper;
+
+    /**
+     * 
+     */
+    public DistributedRegistry(String domainURI, String registryURI) {
+        this.domainURI = domainURI;
+        this.registryURI = registryURI;
+    }
+
+    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;
+        }
+    }
+
+    /* (non-Javadoc)
+     * @see org.apache.tuscany.sca.runtime.EndpointRegistry#addEndpoint(org.apache.tuscany.sca.assembly.Endpoint)
+     */
+    public void addEndpoint(Endpoint endpoint) {
+        // TODO Auto-generated method stub
+
+    }
+
+    /* (non-Javadoc)
+     * @see org.apache.tuscany.sca.runtime.EndpointRegistry#addEndpointReference(org.apache.tuscany.sca.assembly.EndpointReference)
+     */
+    public void addEndpointReference(EndpointReference endpointReference) {
+        // TODO Auto-generated method stub
+
+    }
+
+    /* (non-Javadoc)
+     * @see org.apache.tuscany.sca.runtime.EndpointRegistry#addListener(org.apache.tuscany.sca.runtime.EndpointListener)
+     */
+    public void addListener(EndpointListener listener) {
+        // TODO Auto-generated method stub
+
+    }
+
+    /* (non-Javadoc)
+     * @see org.apache.tuscany.sca.runtime.EndpointRegistry#findEndpoint(org.apache.tuscany.sca.assembly.EndpointReference)
+     */
+    public List<Endpoint> findEndpoint(EndpointReference endpointReference) {
+        // TODO Auto-generated method stub
+        return null;
+    }
+
+    /* (non-Javadoc)
+     * @see org.apache.tuscany.sca.runtime.EndpointRegistry#findEndpointReference(org.apache.tuscany.sca.assembly.Endpoint)
+     */
+    public List<EndpointReference> findEndpointReference(Endpoint endpoint) {
+        // TODO Auto-generated method stub
+        return null;
+    }
+
+    /* (non-Javadoc)
+     * @see org.apache.tuscany.sca.runtime.EndpointRegistry#getEndpoint(java.lang.String)
+     */
+    public Endpoint getEndpoint(String uri) {
+        // TODO Auto-generated method stub
+        return null;
+    }
+
+    /* (non-Javadoc)
+     * @see org.apache.tuscany.sca.runtime.EndpointRegistry#getEndpointRefereneces()
+     */
+    public List<EndpointReference> getEndpointRefereneces() {
+        // TODO Auto-generated method stub
+        return null;
+    }
+
+    /* (non-Javadoc)
+     * @see org.apache.tuscany.sca.runtime.EndpointRegistry#getEndpoints()
+     */
+    public List<Endpoint> getEndpoints() {
+        // TODO Auto-generated method stub
+        return null;
+    }
+
+    /* (non-Javadoc)
+     * @see org.apache.tuscany.sca.runtime.EndpointRegistry#getListeners()
+     */
+    public List<EndpointListener> getListeners() {
+        // TODO Auto-generated method stub
+        return null;
+    }
+
+    /* (non-Javadoc)
+     * @see org.apache.tuscany.sca.runtime.EndpointRegistry#removeEndpoint(org.apache.tuscany.sca.assembly.Endpoint)
+     */
+    public void removeEndpoint(Endpoint endpoint) {
+        // TODO Auto-generated method stub
+
+    }
+
+    /* (non-Javadoc)
+     * @see org.apache.tuscany.sca.runtime.EndpointRegistry#removeEndpointReference(org.apache.tuscany.sca.assembly.EndpointReference)
+     */
+    public void removeEndpointReference(EndpointReference endpointReference) {
+        // TODO Auto-generated method stub
+
+    }
+
+    /* (non-Javadoc)
+     * @see org.apache.tuscany.sca.runtime.EndpointRegistry#removeListener(org.apache.tuscany.sca.runtime.EndpointListener)
+     */
+    public void removeListener(EndpointListener listener) {
+        // TODO Auto-generated method stub
+
+    }
+
+    /* (non-Javadoc)
+     * @see org.apache.tuscany.sca.runtime.EndpointRegistry#updateEndpoint(java.lang.String, org.apache.tuscany.sca.assembly.Endpoint)
+     */
+    public void updateEndpoint(String uri, Endpoint endpoint) {
+        // TODO Auto-generated method stub
+
+    }
+
+}
diff --git a/java/sca/modules/endpoint-zookeeper/src/main/java/org/apache/tuscany/sca/endpoint/zookeeper/ZooKeeperHelper.java b/java/sca/modules/endpoint-zookeeper/src/main/java/org/apache/tuscany/sca/endpoint/zookeeper/ZooKeeperHelper.java
new file mode 100644
index 0000000000..3f7a5c63be
--- /dev/null
+++ b/java/sca/modules/endpoint-zookeeper/src/main/java/org/apache/tuscany/sca/endpoint/zookeeper/ZooKeeperHelper.java
@@ -0,0 +1,234 @@
+/*
+ * 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.File;
+import java.io.IOException;
+import java.io.UnsupportedEncodingException;
+import java.net.URI;
+import java.net.URLDecoder;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.apache.zookeeper.CreateMode;
+import org.apache.zookeeper.KeeperException;
+import org.apache.zookeeper.WatchedEvent;
+import org.apache.zookeeper.Watcher;
+import org.apache.zookeeper.ZooKeeper;
+import org.apache.zookeeper.KeeperException.Code;
+import org.apache.zookeeper.ZooDefs.Ids;
+import org.apache.zookeeper.data.ACL;
+import org.apache.zookeeper.data.Stat;
+import org.apache.zookeeper.server.ZooKeeperServer;
+import org.apache.zookeeper.server.ZooKeeperServerMain;
+import org.apache.zookeeper.server.ZooKeeperServer.DataTreeBuilder;
+import org.apache.zookeeper.server.persistence.FileTxnSnapLog;
+
+/**
+ * 
+ */
+public class ZooKeeperHelper implements Watcher {
+    public ZooKeeper connect(String host, int port, int timeout) throws IOException {
+        return new ZooKeeper(host + ":" + port, timeout, this);
+    }
+
+    public String getName(String uri) {
+        String name = uri.replace("$", "$$");
+        return name.replace('/', '$');
+    }
+
+    private byte[] getBytes(String str) {
+        try {
+            return str.getBytes("UTF-8");
+        } catch (UnsupportedEncodingException e) {
+            throw new IllegalArgumentException(e);
+        }
+    }
+
+    public String join(ZooKeeper zooKeeper, String domainURI, String nodeURI) throws KeeperException,
+        InterruptedException {
+        String domain = "/" + getName(domainURI);
+        Stat stat = zooKeeper.exists(domain, false);
+        String path = domain;
+        if (stat == null) {
+            path = zooKeeper.create(domain, getBytes(domainURI), Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
+        }
+        path = path + "/" + getName(nodeURI);
+        stat = zooKeeper.exists(path, false);
+        if (stat != null) {
+            return zooKeeper.create(path, getBytes(nodeURI), Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL);
+        } else {
+            return path;
+        }
+    }
+
+    public String getPath(String... uris) {
+        StringBuffer buffer = new StringBuffer();
+        for (String uri : uris) {
+            buffer.append('/').append(getName(uri));
+        }
+        return buffer.toString();
+    }
+
+    public void put(ZooKeeper zooKeeper, String domainURI, String nodeURI, String endpointURI, byte[] endpoint)
+        throws KeeperException, InterruptedException {
+        String path = join(zooKeeper, domainURI, nodeURI);
+        path = path + "/" + getName(endpointURI);
+        Stat stat = zooKeeper.exists(path, false);
+        if (stat == null) {
+            zooKeeper.create(path, endpoint, Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL);
+        } else {
+            zooKeeper.setData(path, endpoint, -1);
+        }
+    }
+
+    public void remove(ZooKeeper zooKeeper, String domainURI, String nodeURI, String endpointURI)
+        throws KeeperException, InterruptedException {
+        String path = getPath(domainURI, nodeURI, endpointURI);
+        zooKeeper.delete(path, -1);
+    }
+
+    public void remove(ZooKeeper zooKeeper, String domainURI, String nodeURI) throws InterruptedException,
+        KeeperException {
+        String node = getPath(domainURI, nodeURI);
+        zooKeeper.delete(node, -1);
+    }
+
+    public byte[] get(ZooKeeper zooKeeper, String domainURI, String nodeURI, String endpointURI)
+        throws KeeperException, InterruptedException {
+        String path = getPath(domainURI, nodeURI, endpointURI);
+        return zooKeeper.getData(path, false, new Stat());
+    }
+
+    public List<byte[]> get(ZooKeeper zooKeeper, String domainURI, String nodeURI) throws KeeperException,
+        InterruptedException {
+        String node = getPath(domainURI, nodeURI);
+        List<String> endpoints = zooKeeper.getChildren(node, false);
+        List<byte[]> data = new ArrayList<byte[]>();
+        for (String endpoint : endpoints) {
+            Stat stat = new Stat();
+            data.add(zooKeeper.getData(endpoint, false, stat));
+        }
+        return data;
+    }
+
+    public List<byte[]> get(ZooKeeper zooKeeper, String domainURI) throws KeeperException, InterruptedException {
+        String path = getPath(domainURI);
+        List<String> nodes = zooKeeper.getChildren(path, false);
+        List<byte[]> data = new ArrayList<byte[]>();
+        for (String node : nodes) {
+            List<String> endpoints = zooKeeper.getChildren(node, false);
+            for (String endpoint : endpoints) {
+                Stat stat = new Stat();
+                data.add(zooKeeper.getData(endpoint, false, stat));
+            }
+        }
+        return data;
+    }
+
+    public ZooKeeper create(String connectString, int timeout, long sessionId, byte[] password) throws IOException {
+        return new ZooKeeper(connectString, timeout, this, sessionId, password);
+    }
+
+    public void process(WatchedEvent event) {
+        System.out.println(event);
+    }
+
+    public ZooKeeperServer createServer(File dataDir, File snapDir, int tickTime) throws IOException {
+        FileTxnSnapLog log = new FileTxnSnapLog(dataDir, snapDir);
+        DataTreeBuilder builder = new ZooKeeperServer.BasicDataTreeBuilder();
+        return new ZooKeeperServer(log, tickTime, builder);
+    }
+
+    public void put(ZooKeeper zooKeeper, String key, Object value) throws KeeperException, InterruptedException {
+        byte[] data = serialize(value);
+        List<ACL> acls = Collections.emptyList();
+        zooKeeper.create(key, data, acls, CreateMode.PERSISTENT);
+    }
+
+    public byte[] serialize(Object value) {
+        return 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);
+        }
+        URI uri = URI.create(domainRegistryURI);
+        if (uri.getHost() != null) {
+            map.put("host", uri.getHost());
+        }
+        if (uri.getPort() != -1) {
+            map.put("port", String.valueOf(uri.getPort()));
+        }
+        int index = domainRegistryURI.indexOf('?');
+        if (index == -1) {
+            return map;
+        }
+        String query = domainRegistryURI.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 static void main(final String[] args) throws Exception {
+        final String options[] =
+            args.length != 0 ? args
+                : new String[] {"9999", System.getProperty("java.io.tmpdir") + File.separator + "zookeeper"};
+        Thread thread = new Thread() {
+            public void run() {
+                ZooKeeperServerMain.main(options);
+            }
+        };
+        thread.start();
+        Thread.sleep(1000);
+        ZooKeeper zooKeeper = new ZooKeeperHelper().connect("localhost", 9999, 500);
+        System.out.println(zooKeeper.getSessionId());
+        try {
+            String data = new String(zooKeeper.getData("/x", false, null));
+            System.out.println(data);
+        } catch (KeeperException e) {
+            if (e.code() == Code.NONODE) {
+                zooKeeper.create("/x", "X".getBytes(), Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
+            }
+        }
+        zooKeeper.create("/x/y", "XY".getBytes(), Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL);
+        Thread.sleep(1000);
+        String data = new String(zooKeeper.getData("/x/y", true, null));
+        System.out.println(data);
+        zooKeeper.close();
+        Thread.sleep(500);
+        System.exit(0);
+    }
+}
diff --git a/java/sca/modules/endpoint-zookeeper/src/main/resources/META-INF/services/org.apache.tuscany.sca.runtime.EndpointRegistry b/java/sca/modules/endpoint-zookeeper/src/main/resources/META-INF/services/org.apache.tuscany.sca.runtime.EndpointRegistry
new file mode 100644
index 0000000000..c17d8c35c5
--- /dev/null
+++ b/java/sca/modules/endpoint-zookeeper/src/main/resources/META-INF/services/org.apache.tuscany.sca.runtime.EndpointRegistry
@@ -0,0 +1,17 @@
+# 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.

+org.apache.tuscany.sca.endpoint.zookeeper.DistributedRegistry;scheme=zookeeper