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diff --git a/org.argeo.cms.ui.workbench/src/org/argeo/cms/ui/workbench/internal/jcr/DefaultRepositoryRegister.java b/org.argeo.cms.ui.workbench/src/org/argeo/cms/ui/workbench/internal/jcr/DefaultRepositoryRegister.java
new file mode 100644
index 000000000..c9ab94648
--- /dev/null
+++ b/org.argeo.cms.ui.workbench/src/org/argeo/cms/ui/workbench/internal/jcr/DefaultRepositoryRegister.java
@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2007-2012 Argeo GmbH
+ *
+ * Licensed 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.argeo.cms.ui.workbench.internal.jcr;
+
+import java.util.Collections;
+import java.util.Map;
+import java.util.Observable;
+import java.util.TreeMap;
+
+import javax.jcr.Repository;
+import javax.jcr.RepositoryException;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.argeo.node.NodeConstants;
+
+public class DefaultRepositoryRegister extends Observable implements RepositoryRegister {
+	/** Key for a JCR repository alias */
+	private final static String CN = NodeConstants.CN;
+	/** Key for a JCR repository URI */
+	// public final static String JCR_REPOSITORY_URI = "argeo.jcr.repository.uri";
+	private final static Log log = LogFactory.getLog(DefaultRepositoryRegister.class);
+
+	/** Read only map which will be directly exposed. */
+	private Map<String, Repository> repositories = Collections.unmodifiableMap(new TreeMap<String, Repository>());
+
+	@SuppressWarnings("rawtypes")
+	public synchronized Repository getRepository(Map parameters) throws RepositoryException {
+		if (!parameters.containsKey(CN))
+			throw new RepositoryException("Parameter " + CN + " has to be defined.");
+		String alias = parameters.get(CN).toString();
+		if (!repositories.containsKey(alias))
+			throw new RepositoryException("No repository registered with alias " + alias);
+
+		return repositories.get(alias);
+	}
+
+	/** Access to the read-only map */
+	public synchronized Map<String, Repository> getRepositories() {
+		return repositories;
+	}
+
+	/** Registers a service, typically called when OSGi services are bound. */
+	@SuppressWarnings("rawtypes")
+	public synchronized void register(Repository repository, Map properties) {
+		String alias;
+		if (properties == null || !properties.containsKey(CN)) {
+			log.warn("Cannot register a repository if no " + CN + " property is specified.");
+			return;
+		}
+		alias = properties.get(CN).toString();
+		Map<String, Repository> map = new TreeMap<String, Repository>(repositories);
+		map.put(alias, repository);
+		repositories = Collections.unmodifiableMap(map);
+		setChanged();
+		notifyObservers(alias);
+	}
+
+	/** Unregisters a service, typically called when OSGi services are unbound. */
+	@SuppressWarnings("rawtypes")
+	public synchronized void unregister(Repository repository, Map properties) {
+		// TODO: also check bean name?
+		if (properties == null || !properties.containsKey(CN)) {
+			log.warn("Cannot unregister a repository without property " + CN);
+			return;
+		}
+
+		String alias = properties.get(CN).toString();
+		Map<String, Repository> map = new TreeMap<String, Repository>(repositories);
+		if (map.remove(alias) == null) {
+			log.warn("No repository was registered with alias " + alias);
+			return;
+		}
+		repositories = Collections.unmodifiableMap(map);
+		setChanged();
+		notifyObservers(alias);
+	}
+}