9 files changed, 612 insertions, 0 deletions
diff --git a/branches/sca-java-2.0-M3/modules/host-rmi/src/main/java/org/apache/tuscany/sca/host/rmi/DefaultRMIHost.java b/branches/sca-java-2.0-M3/modules/host-rmi/src/main/java/org/apache/tuscany/sca/host/rmi/DefaultRMIHost.java
new file mode 100644
index 0000000000..f98ce018e5
--- /dev/null
+++ b/branches/sca-java-2.0-M3/modules/host-rmi/src/main/java/org/apache/tuscany/sca/host/rmi/DefaultRMIHost.java
@@ -0,0 +1,169 @@
+/*
+ * 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.host.rmi;
+
+import java.net.URI;
+import java.rmi.AlreadyBoundException;
+import java.rmi.NoSuchObjectException;
+import java.rmi.NotBoundException;
+import java.rmi.Remote;
+import java.rmi.RemoteException;
+import java.rmi.registry.LocateRegistry;
+import java.rmi.registry.Registry;
+import java.rmi.server.UnicastRemoteObject;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.logging.Logger;
+
+/**
+ * Default implementation of a RMI host.
+ *
+ * @version $Rev$ $Date$
+ */
+public class DefaultRMIHost implements RMIHost {
+    private final static Logger logger = Logger.getLogger(DefaultRMIHost.class.getName());
+    // Map of RMI registries started and running
+    private Map<String, Registry> rmiRegistries;
+
+    public DefaultRMIHost() {
+        rmiRegistries = new ConcurrentHashMap<String, Registry>();
+        /*
+         * if (System.getSecurityManager() == null) { System.setSecurityManager(new RMISecurityManager()); }
+         */
+    }
+
+    public void registerService(String uri, Remote serviceObject) throws RMIHostException, RMIHostRuntimeException {
+        RMIURI rmiURI = new RMIURI(uri);
+
+        Registry registry;
+        try {
+            registry = rmiRegistries.get(Integer.toString(rmiURI.port));
+            if (registry == null) {
+                try {
+                    registry = LocateRegistry.getRegistry(rmiURI.port);
+                    registry.lookup(rmiURI.serviceName);
+                } catch (RemoteException e) {
+                    registry = LocateRegistry.createRegistry(rmiURI.port);
+                } catch (NotBoundException e) {
+                    // Ignore
+                }
+                rmiRegistries.put(Integer.toString(rmiURI.port), registry);
+            }
+            registry.bind(rmiURI.serviceName, serviceObject);
+            logger.info("RMI service registered: " + rmiURI);
+        } catch (AlreadyBoundException e) {
+            throw new RMIHostException(e);
+        } catch (RemoteException e) {
+            RMIHostRuntimeException rmiExec = new RMIHostRuntimeException(e.getMessage());
+            rmiExec.setStackTrace(e.getStackTrace());
+            throw rmiExec;
+        }
+
+    }
+
+    public void unregisterService(String uri) throws RMIHostException, RMIHostRuntimeException {
+        RMIURI rmiURI = new RMIURI(uri);
+
+        try {
+            Registry registry = rmiRegistries.get(Integer.toString(rmiURI.port));
+            if (registry == null) {
+                registry = LocateRegistry.getRegistry(rmiURI.port);
+                rmiRegistries.put(Integer.toString(rmiURI.port), registry);
+            }
+            registry.unbind(rmiURI.serviceName);
+            logger.info("RMI service unregistered: " + rmiURI);
+        } catch (RemoteException e) {
+            RMIHostRuntimeException rmiExec = new RMIHostRuntimeException(e.getMessage());
+            rmiExec.setStackTrace(e.getStackTrace());
+            throw rmiExec;
+        } catch (NotBoundException e) {
+            throw new RMIHostException(e.getMessage());
+        }
+    }
+
+    public Remote findService(String uri) throws RMIHostException, RMIHostRuntimeException {
+        RMIURI rmiURI = new RMIURI(uri);
+
+        Remote remoteService = null;
+        try {
+            // Requires permission java.net.SocketPermission "host:port", "connect,accept,resolve"
+            // in security policy.
+            Registry registry = LocateRegistry.getRegistry(rmiURI.host, rmiURI.port);
+
+            if (registry != null) {
+                remoteService = registry.lookup(rmiURI.serviceName);
+            }
+        } catch (RemoteException e) {
+            RMIHostRuntimeException rmiExec = new RMIHostRuntimeException(e.getMessage());
+            rmiExec.setStackTrace(e.getStackTrace());
+            throw rmiExec;
+        } catch (NotBoundException e) {
+            throw new RMIHostException(e.getMessage());
+        }
+        return remoteService;
+    }
+
+    /**
+     * A representation of an RMI URI.
+     *
+     * rmi://[host][:port][/[object]]
+     * rmi:[/][object]
+     */
+    private static class RMIURI {
+        private String uriStr;
+        private String host;
+        private int port;
+        private String serviceName;
+
+        private RMIURI(String uriStr) {
+            this.uriStr = uriStr;
+            URI uri = URI.create(uriStr);
+            host = uri.getHost();
+            if (host == null) {
+                host = "localhost";
+            }
+            port = uri.getPort();
+            if (port <= 0) {
+                port = RMI_DEFAULT_PORT;
+            }
+            String path = uri.getPath();
+            if (path != null && path.charAt(0) == '/') {
+                path = path.substring(1);
+            }
+            serviceName = path;
+        }
+
+        public String toString() {
+            return uriStr;
+        }
+    }
+
+    public void destroy() {
+        for (Registry registry : rmiRegistries.values()) {
+            try {
+                UnicastRemoteObject.unexportObject(registry, false);
+            } catch (NoSuchObjectException e) {
+                e.printStackTrace();
+            }
+        }
+        rmiRegistries.clear();
+    }
+
+}
diff --git a/branches/sca-java-2.0-M3/modules/host-rmi/src/main/java/org/apache/tuscany/sca/host/rmi/DefaultRMIHostExtensionPoint.java b/branches/sca-java-2.0-M3/modules/host-rmi/src/main/java/org/apache/tuscany/sca/host/rmi/DefaultRMIHostExtensionPoint.java
new file mode 100644
index 0000000000..edfda79dd0
--- /dev/null
+++ b/branches/sca-java-2.0-M3/modules/host-rmi/src/main/java/org/apache/tuscany/sca/host/rmi/DefaultRMIHostExtensionPoint.java
@@ -0,0 +1,61 @@
+/*
+ * 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.host.rmi;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.core.ModuleActivator;
+
+/**
+ * Default implementation of an RMI host extension point.
+ *
+ * @version $Rev$ $Date$
+ */
+public class DefaultRMIHostExtensionPoint implements RMIHostExtensionPoint, ModuleActivator {
+
+    private List<RMIHost> rmiHosts = new ArrayList<RMIHost>();
+
+    public DefaultRMIHostExtensionPoint() {
+        addRMIHost(new DefaultRMIHost());
+    }
+
+    public void addRMIHost(RMIHost rmiHost) {
+        rmiHosts.add(rmiHost);
+    }
+
+    public void removeRMIHost(RMIHost rmiHost) {
+        rmiHosts.remove(rmiHost);
+    }
+
+    public List<RMIHost> getRMIHosts() {
+        return rmiHosts;
+    }
+
+    public void start(ExtensionPointRegistry registry) {
+    }
+
+    public void stop(ExtensionPointRegistry registry) {
+        for (RMIHost host : rmiHosts) {
+            host.destroy();
+        }
+    }
+}
diff --git a/branches/sca-java-2.0-M3/modules/host-rmi/src/main/java/org/apache/tuscany/sca/host/rmi/ExtensibleRMIHost.java b/branches/sca-java-2.0-M3/modules/host-rmi/src/main/java/org/apache/tuscany/sca/host/rmi/ExtensibleRMIHost.java
new file mode 100644
index 0000000000..e2fad5d9b5
--- /dev/null
+++ b/branches/sca-java-2.0-M3/modules/host-rmi/src/main/java/org/apache/tuscany/sca/host/rmi/ExtensibleRMIHost.java
@@ -0,0 +1,67 @@
+/*
+ * 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.host.rmi;
+
+import java.rmi.Remote;
+
+
+/**
+ * Default implementation of an extensible RMI host.
+ *
+ * @version $Rev$ $Date$
+ */
+public class ExtensibleRMIHost implements RMIHost {
+
+    private RMIHostExtensionPoint rmiHosts;
+
+    public ExtensibleRMIHost(RMIHostExtensionPoint rmiHosts) {
+        this.rmiHosts = rmiHosts;
+    }
+
+    public void registerService(String uri, Remote serviceObject) throws RMIHostException, RMIHostRuntimeException {
+        if (rmiHosts.getRMIHosts().isEmpty()) {
+            throw new RMIHostException("No RMI host available");
+        }
+        getDefaultHost().registerService(uri, serviceObject);
+    }
+
+    public void unregisterService(String uri) throws RMIHostException, RMIHostRuntimeException {
+        if (rmiHosts.getRMIHosts().isEmpty()) {
+            throw new RMIHostException("No RMI host available");
+        }
+        getDefaultHost().unregisterService(uri);
+    }
+
+    public Remote findService(String uri) throws RMIHostException, RMIHostRuntimeException {
+        if (rmiHosts.getRMIHosts().isEmpty()) {
+            throw new RMIHostException("No RMI host available");
+        }
+        return getDefaultHost().findService(uri);
+    }
+
+    protected RMIHost getDefaultHost() {
+        return rmiHosts.getRMIHosts().get(0);
+    }
+
+    public void destroy() {
+        getDefaultHost().destroy();
+    }
+
+}
diff --git a/branches/sca-java-2.0-M3/modules/host-rmi/src/main/java/org/apache/tuscany/sca/host/rmi/RMIHost.java b/branches/sca-java-2.0-M3/modules/host-rmi/src/main/java/org/apache/tuscany/sca/host/rmi/RMIHost.java
new file mode 100644
index 0000000000..b85cc2fc2a
--- /dev/null
+++ b/branches/sca-java-2.0-M3/modules/host-rmi/src/main/java/org/apache/tuscany/sca/host/rmi/RMIHost.java
@@ -0,0 +1,65 @@
+/*
+ * 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.host.rmi;
+
+import java.rmi.Remote;
+
+/**
+ * RMI Service hosting interface to be implemented by host environments that allows SCA Components
+ * to register RMI Services to handle inbound service requests over RMI to SCA Components
+ *
+ * @version $Rev$ $Date$
+ */
+public interface RMIHost {
+    int RMI_DEFAULT_PORT = 1099;
+
+    /**
+     * Register an RMI service with the given name and port
+     *
+     * @param uri the URI against which the server is to be registered
+     * @param serviceObject the server object to be registered
+     * @throws RMIHostException
+     * @throws RMIHostRuntimeException
+     */
+    void registerService(String uri, Remote serviceObject) throws RMIHostException, RMIHostRuntimeException;
+
+    /**
+     * Unregister a service registered under the given service name and port number
+     *
+     * @param uri the URI of the server
+     * @throws RMIHostException
+     * @throws RMIHostRuntimeException
+     */
+    void unregisterService(String uri) throws RMIHostException, RMIHostRuntimeException;
+
+    /**
+     * find a remote service hosted on the given host, port and service name
+     *
+     * @param uri the URI of the service
+     * @return the RMI server object
+     * @throws RMIHostException
+     * @throws RMIHostRuntimeException
+     */
+    Remote findService(String uri) throws RMIHostException, RMIHostRuntimeException;
+
+    /**
+     * Destroy the host. It can be used to unbind the RMI registry
+     */
+    void destroy();
+}
diff --git a/branches/sca-java-2.0-M3/modules/host-rmi/src/main/java/org/apache/tuscany/sca/host/rmi/RMIHostException.java b/branches/sca-java-2.0-M3/modules/host-rmi/src/main/java/org/apache/tuscany/sca/host/rmi/RMIHostException.java
new file mode 100644
index 0000000000..959eb72f6e
--- /dev/null
+++ b/branches/sca-java-2.0-M3/modules/host-rmi/src/main/java/org/apache/tuscany/sca/host/rmi/RMIHostException.java
@@ -0,0 +1,45 @@
+/*
+ * 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.host.rmi;
+
+
+/**
+ * This exception will relate to situations where the end applicaition's input is the cause of the exception
+ *
+ * @version $Rev: 486986 $ $Date: 2006-12-14 11:48:28 +0530 (Thu, 14 Dec 2006) $
+ */
+public class RMIHostException extends RuntimeException {
+ 
+    private static final long serialVersionUID = 3378300080918544410L;
+
+    public RMIHostException() {
+    }
+
+    public RMIHostException(String message) {
+        super(message);
+    }
+
+    public RMIHostException(Throwable e) {
+        super(e);
+    }
+
+    public RMIHostException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}
diff --git a/branches/sca-java-2.0-M3/modules/host-rmi/src/main/java/org/apache/tuscany/sca/host/rmi/RMIHostExtensionPoint.java b/branches/sca-java-2.0-M3/modules/host-rmi/src/main/java/org/apache/tuscany/sca/host/rmi/RMIHostExtensionPoint.java
new file mode 100644
index 0000000000..40d6013940
--- /dev/null
+++ b/branches/sca-java-2.0-M3/modules/host-rmi/src/main/java/org/apache/tuscany/sca/host/rmi/RMIHostExtensionPoint.java
@@ -0,0 +1,51 @@
+/*
+ * 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.host.rmi;
+
+import java.util.List;
+
+/**
+ * An extension point for RMI hosts.
+ * 
+ * @version $Rev$ $Date$
+ */
+public interface RMIHostExtensionPoint {
+
+    /**
+     * Adds a Servlet host extension.
+     * 
+     * @param rmiHost
+     */
+    void addRMIHost(RMIHost rmiHost);
+
+    /**
+     * Removes a Servlet host extension.
+     * 
+     * @param rmiHost
+     */
+    void removeRMIHost(RMIHost rmiHost);
+    
+    /**
+     * Returns a list of Servlet host extensions.
+     * 
+     * @return
+     */
+    List<RMIHost> getRMIHosts();
+
+}
diff --git a/branches/sca-java-2.0-M3/modules/host-rmi/src/main/java/org/apache/tuscany/sca/host/rmi/RMIHostRuntimeException.java b/branches/sca-java-2.0-M3/modules/host-rmi/src/main/java/org/apache/tuscany/sca/host/rmi/RMIHostRuntimeException.java
new file mode 100644
index 0000000000..998287f998
--- /dev/null
+++ b/branches/sca-java-2.0-M3/modules/host-rmi/src/main/java/org/apache/tuscany/sca/host/rmi/RMIHostRuntimeException.java
@@ -0,0 +1,46 @@
+/*
+ * 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.host.rmi;
+
+
+/**
+ * This exception relates to cases where there is a problem with the
+ * Host runtime
+ *
+ * @version $Rev$ $Date$
+ */
+public class RMIHostRuntimeException extends RuntimeException {
+   
+    private static final long serialVersionUID = -2639598547028423686L;
+
+    public RMIHostRuntimeException() {
+    }
+
+    public RMIHostRuntimeException(String message) {
+        super(message);
+    }
+    
+    public RMIHostRuntimeException(Throwable e) {
+        super(e);
+    }
+
+    public RMIHostRuntimeException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}
diff --git a/branches/sca-java-2.0-M3/modules/host-rmi/src/main/resources/META-INF/services/org.apache.tuscany.sca.host.rmi.RMIHostExtensionPoint b/branches/sca-java-2.0-M3/modules/host-rmi/src/main/resources/META-INF/services/org.apache.tuscany.sca.host.rmi.RMIHostExtensionPoint
new file mode 100644
index 0000000000..014c5391b8
--- /dev/null
+++ b/branches/sca-java-2.0-M3/modules/host-rmi/src/main/resources/META-INF/services/org.apache.tuscany.sca.host.rmi.RMIHostExtensionPoint
@@ -0,0 +1,18 @@
+# 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.host.rmi.DefaultRMIHostExtensionPoint
diff --git a/branches/sca-java-2.0-M3/modules/host-rmi/src/test/java/org/apache/tuscany/sca/host/rmi/RMIHostImplTestCase.java b/branches/sca-java-2.0-M3/modules/host-rmi/src/test/java/org/apache/tuscany/sca/host/rmi/RMIHostImplTestCase.java
new file mode 100644
index 0000000000..88f3e89489
--- /dev/null
+++ b/branches/sca-java-2.0-M3/modules/host-rmi/src/test/java/org/apache/tuscany/sca/host/rmi/RMIHostImplTestCase.java
@@ -0,0 +1,90 @@
+/*
+ * 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.host.rmi;
+
+import java.io.Serializable;
+import java.rmi.Remote;
+
+import junit.framework.TestCase;
+
+/**
+ * Test cases for the RMI Host.
+ *
+ * @version $Rev$ $Date$
+ */
+public class RMIHostImplTestCase extends TestCase {
+
+    public void testInit() {
+        new DefaultRMIHost();
+    }
+
+    public void testFindServiceBadHost() throws RMIHostRuntimeException, RMIHostException {
+        try {
+            new DefaultRMIHost().findService("rmi://locahost:9994/$BAD$");
+            fail();
+        } catch (RMIHostRuntimeException e) {
+            // expected
+        }
+    }
+
+    public void testRegisterService1() throws RMIHostRuntimeException, RMIHostException {
+        DefaultRMIHost host = new DefaultRMIHost();
+        host.registerService("rmi://localhost:9996/foo1", new MockRemote());
+        host.unregisterService("rmi://localhost:9996/foo1");
+    }
+
+    public void testExistingRegistry() throws RMIHostRuntimeException, RMIHostException {
+        DefaultRMIHost host1 = new DefaultRMIHost();
+        host1.registerService("rmi://localhost:9995/foo1", new MockRemote());
+        DefaultRMIHost host2 = new DefaultRMIHost();
+        host2.registerService("rmi://localhost:9995/foo2", new MockRemote());
+        host2.unregisterService("rmi://localhost:9995/foo1");
+        host2.unregisterService("rmi://localhost:9995/foo2");
+    }
+
+    public void testRegisterService2() throws RMIHostRuntimeException, RMIHostException {
+        DefaultRMIHost host = new DefaultRMIHost();
+        host.registerService("rmi://localhost:9999/bar1", new MockRemote());
+        host.unregisterService("rmi://localhost:9999/bar1");
+    }
+
+    public void testRegisterServiceAlreadyBound() throws RMIHostRuntimeException, RMIHostException {
+        DefaultRMIHost host = new DefaultRMIHost();
+        host.registerService("rmi://localhost:9997/bar2", new MockRemote());
+        try {
+            host.registerService("rmi://localhost:9997/bar2", new MockRemote());
+        } catch (RMIHostException e) {
+            // expected
+            host.unregisterService("rmi://localhost:9997/bar2");
+        }
+    }
+
+    public void testUnRegisterService() throws RMIHostRuntimeException, RMIHostException {
+        DefaultRMIHost host = new DefaultRMIHost();
+        try {
+            host.unregisterService("rmi://localhost:9998/bar3");
+            fail();
+        } catch (RMIHostRuntimeException e) {
+            // expected
+        }
+    }
+
+    private static class MockRemote implements Remote, Serializable {
+    }
+}