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diff --git a/sandbox/axis2-1.4/demos/workpool-distributed/src/main/java/workpool/WorkpoolService.java b/sandbox/axis2-1.4/demos/workpool-distributed/src/main/java/workpool/WorkpoolService.java
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+++ b/sandbox/axis2-1.4/demos/workpool-distributed/src/main/java/workpool/WorkpoolService.java
@@ -0,0 +1,91 @@
+/*
+ * 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 workpool;
+
+import org.apache.tuscany.sca.core.context.CallableReferenceImpl;
+import org.apache.tuscany.sca.databinding.annotation.DataBinding;
+import org.apache.tuscany.sca.databinding.job.Job;
+import org.osoa.sca.annotations.OneWay;
+import org.osoa.sca.annotations.Remotable;
+import org.osoa.sca.ServiceReference;
+
+@DataBinding("org.apache.tuscany.sca.databinding.job.Job")
+@Remotable
+public interface WorkpoolService {
+
+    /* this the functional part */
+    void submit(Job i);
+
+    /* the time between two subsequent worker invocations */
+    double getServiceTime();
+
+    /* the number of ResultJob received */
+    long getJobComputed();
+
+    /* the time elapsed between the stream has initiated and now */
+    long getElapsedTime();
+
+    /* the size of the internal queue : it's not accurate */
+    int estimatedQueueSize();
+
+    /* the average time between two consuecutive submit */
+    double getArrivalTime();
+
+    void start();
+
+    void stop();
+
+    /*
+     * this is the part needed by management. May be in future i'll refactor it
+     * order to hide this part.
+     */
+    @OneWay
+    void handleResult(Job j, boolean reuse, String string,
+            CallableReferenceImpl<WorkerService> worker, boolean newJob);
+
+    void addTrigger(CallableReferenceImpl<Trigger> reference);
+
+    void removeTrigger();
+
+    void registerManager(
+            CallableReferenceImpl<WorkpoolManager> createSelfReference);
+
+    /*
+     * This could placed in another interface definition - think about it These
+     * methods evict, and evictAll are needed when a worker finish to exist and
+     * it needs to be evicted by the WorkpoolManager. In the system I have two
+     * caches: 1) a domain cache, which holds the components URI 2) a
+     * workerReference cache (implemented by a ConcurrentHashMap), which holds a
+     * proxy to each worker. Every proxy gets built from the worker callable
+     * reference. I'm thinking for placing the workerReferenceCache in a local
+     * interface. Assuming that WorkpoolService and WorkpoolManager are in the
+     * same JVM.
+     */
+    void evict(String workerURI);
+
+    void evictAll();
+
+    /*
+     * these two are no longer needed. I leave it because if i'll have time to
+     * do dynamic wiring the first one is needed. void PostWorkerName(String
+     * referenceName);
+     */
+    void PostWorkerReference(CallableReferenceImpl<WorkerService> worker);
+
+}