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diff --git a/org.argeo.slc.core/src/org/argeo/slc/core/execution/AbstractExecutionModulesManager.java b/org.argeo.slc.core/src/org/argeo/slc/core/execution/AbstractExecutionModulesManager.java
new file mode 100644
index 000000000..1a07313f0
--- /dev/null
+++ b/org.argeo.slc.core/src/org/argeo/slc/core/execution/AbstractExecutionModulesManager.java
@@ -0,0 +1,157 @@
+/*
+ * 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.slc.core.execution;
+
+import java.util.Map;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.argeo.slc.execution.ExecutionContext;
+import org.argeo.slc.execution.ExecutionFlow;
+import org.argeo.slc.execution.ExecutionFlowDescriptorConverter;
+import org.argeo.slc.execution.ExecutionModulesManager;
+import org.argeo.slc.execution.RealizedFlow;
+
+/** Provides the base feature of an execution module manager. */
+public abstract class AbstractExecutionModulesManager implements
+		ExecutionModulesManager {
+	private final static Log log = LogFactory
+			.getLog(AbstractExecutionModulesManager.class);
+
+//	private List<FilteredNotifier> filteredNotifiers = Collections
+//			.synchronizedList(new ArrayList<FilteredNotifier>());
+
+	protected abstract ExecutionFlow findExecutionFlow(String moduleName,
+			String moduleVersion, String flowName);
+
+	protected abstract ExecutionContext findExecutionContext(String moduleName,
+			String moduleVersion);
+
+	protected abstract ExecutionFlowDescriptorConverter getExecutionFlowDescriptorConverter(
+			String moduleName, String moduleVersion);
+
+	public void execute(RealizedFlow realizedFlow) {
+		if (log.isTraceEnabled())
+			log.trace("Executing " + realizedFlow);
+
+		String moduleName = realizedFlow.getModuleName();
+		String moduleVersion = realizedFlow.getModuleVersion();
+
+		Map<? extends String, ? extends Object> variablesToAdd = getExecutionFlowDescriptorConverter(
+				moduleName, moduleVersion).convertValues(
+				realizedFlow.getFlowDescriptor());
+		ExecutionContext executionContext = findExecutionContext(moduleName,
+				moduleVersion);
+		for (String key : variablesToAdd.keySet())
+			executionContext.setVariable(key, variablesToAdd.get(key));
+
+		ExecutionFlow flow = findExecutionFlow(moduleName, moduleVersion,
+				realizedFlow.getFlowDescriptor().getName());
+
+		//
+		// Actually runs the flow, IN THIS THREAD
+		//
+		flow.run();
+		//
+		//
+		//
+	}
+
+//	public void dispatchUpdateStatus(ExecutionProcess process,
+//			String oldStatus, String newStatus) {
+//		// filtered notifiers
+//		for (Iterator<FilteredNotifier> it = filteredNotifiers.iterator(); it
+//				.hasNext();) {
+//			FilteredNotifier filteredNotifier = it.next();
+//			if (filteredNotifier.receiveFrom(process))
+//				filteredNotifier.getNotifier().updateStatus(process, oldStatus,
+//						newStatus);
+//		}
+//
+//	}
+
+//	public void dispatchAddSteps(ExecutionProcess process,
+//			List<ExecutionStep> steps) {
+//		process.addSteps(steps);
+//		for (Iterator<FilteredNotifier> it = filteredNotifiers.iterator(); it
+//				.hasNext();) {
+//			FilteredNotifier filteredNotifier = it.next();
+//			if (filteredNotifier.receiveFrom(process))
+//				filteredNotifier.getNotifier().addSteps(process, steps);
+//		}
+//	}
+
+//	public void registerProcessNotifier(ExecutionProcessNotifier notifier,
+//			Map<String, String> properties) {
+//		filteredNotifiers.add(new FilteredNotifier(notifier, properties));
+//	}
+//
+//	public void unregisterProcessNotifier(ExecutionProcessNotifier notifier,
+//			Map<String, String> properties) {
+//		filteredNotifiers.remove(notifier);
+//	}
+
+//	protected class FilteredNotifier {
+//		private final ExecutionProcessNotifier notifier;
+//		private final String processId;
+//
+//		public FilteredNotifier(ExecutionProcessNotifier notifier,
+//				Map<String, String> properties) {
+//			super();
+//			this.notifier = notifier;
+//			if (properties == null)
+//				properties = new HashMap<String, String>();
+//			if (properties.containsKey(SLC_PROCESS_ID))
+//				processId = properties.get(SLC_PROCESS_ID);
+//			else
+//				processId = null;
+//		}
+//
+//		/**
+//		 * Whether event from this process should be received by this listener.
+//		 */
+//		public Boolean receiveFrom(ExecutionProcess process) {
+//			if (processId != null)
+//				if (process.getUuid().equals(processId))
+//					return true;
+//				else
+//					return false;
+//			return true;
+//		}
+//
+//		@Override
+//		public int hashCode() {
+//			return notifier.hashCode();
+//		}
+//
+//		@Override
+//		public boolean equals(Object obj) {
+//			if (obj instanceof FilteredNotifier) {
+//				FilteredNotifier fn = (FilteredNotifier) obj;
+//				return notifier.equals(fn.notifier);
+//			} else if (obj instanceof ExecutionProcessNotifier) {
+//				ExecutionProcessNotifier epn = (ExecutionProcessNotifier) obj;
+//				return notifier.equals(epn);
+//			} else
+//				return false;
+//		}
+//
+//		public ExecutionProcessNotifier getNotifier() {
+//			return notifier;
+//		}
+//
+//	}
+}