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authordougsleite <dougsleite@13f79535-47bb-0310-9956-ffa450edef68>2009-08-10 23:15:27 +0000
committerdougsleite <dougsleite@13f79535-47bb-0310-9956-ffa450edef68>2009-08-10 23:15:27 +0000
commitd4bbe6fa031a26a4b3d86f455174a6cc0ed1cdd3 (patch)
tree561789572b810631607e7746af8b6f51a6fd3987 /sandbox
parent8892aa049dd2bf0d6abd7d85d9c21dfca372d1d5 (diff)
- Modifying the Lowest Common Ancestor (LCA) algorithm. The algorithm is an implementation of the Bender and Farach's LCA algorithm.
git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@802952 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to 'sandbox')
-rw-r--r--sandbox/dougsleite/guardian-model/src/main/java/org/apache/tuscany/sca/guardian/GuardianGroupImpl.java146
-rw-r--r--sandbox/dougsleite/guardian-model/src/main/java/org/apache/tuscany/sca/guardian/InvalidNodeException.java30
-rw-r--r--sandbox/dougsleite/guardian-model/src/main/java/org/apache/tuscany/sca/guardian/ResolutionTreeUtils.java153
-rw-r--r--sandbox/dougsleite/guardian-model/src/main/resources/lcaTest.xml21
-rw-r--r--sandbox/dougsleite/guardian-model/src/test/java/org/apache/tuscany/sca/guardian/itests/LCATestCase.java114
-rw-r--r--sandbox/dougsleite/guardian-model/src/test/java/org/apache/tuscany/sca/guardian/itests/concurrentexceptions/Launch.java6
6 files changed, 348 insertions, 122 deletions
diff --git a/sandbox/dougsleite/guardian-model/src/main/java/org/apache/tuscany/sca/guardian/GuardianGroupImpl.java b/sandbox/dougsleite/guardian-model/src/main/java/org/apache/tuscany/sca/guardian/GuardianGroupImpl.java
index c8964f2b98..53bbeb08ff 100644
--- a/sandbox/dougsleite/guardian-model/src/main/java/org/apache/tuscany/sca/guardian/GuardianGroupImpl.java
+++ b/sandbox/dougsleite/guardian-model/src/main/java/org/apache/tuscany/sca/guardian/GuardianGroupImpl.java
@@ -48,11 +48,13 @@ public class GuardianGroupImpl implements GuardianGroup {
private InnerGuardianGroupThread innerThread;
private List<GlobalExceptionInterface> concurrentExList;
private Map<String, OMElement> resolutionTreeElements;
+ private ResolutionTreeUtils resolutionTreeUtils;
public GuardianGroupImpl() {
guardianList = new LinkedList<GuardianMember>();
concurrentExList = new LinkedList<GlobalExceptionInterface>();
innerThread = new InnerGuardianGroupThread();
+ resolutionTreeUtils = new ResolutionTreeUtils();
}
@Property(name = "recovery_rules", required = false)
@@ -228,12 +230,6 @@ public class GuardianGroupImpl implements GuardianGroup {
gmList = getMatchingParticipants(participantMatch, ex);
- //TESTING--------------------------------------------
- for (GuardianMember gm : gmList) {
- System.out.println(gm.getParticipantIdentifier());
- }
- //---------------------------------------------------
-
if (!gmList.isEmpty()) {
throwExceptionTag(gmList, ex);
}
@@ -414,6 +410,7 @@ public class GuardianGroupImpl implements GuardianGroup {
private GlobalExceptionInterface checkExceptionResolutionTrees(List<GlobalExceptionInterface> exceptionList, Iterator resolutionTreesElements) {
OMElement tree;
+ OMElement root;
String exceptionLevel = null;
GlobalExceptionInterface resolvedEx = null;
@@ -421,7 +418,8 @@ public class GuardianGroupImpl implements GuardianGroup {
tree = (OMElement) resolutionTreesElements.next();
exceptionLevel = tree.getAttributeValue(Constants.EXCEPTION_LEVEL_QNAME);
- resolvedEx = checkExceptionResolutionTree(exceptionList, tree.getChildElements(), new WrapperInteger(exceptionList.size()));
+ root = (OMElement) tree.getChildElements().next();
+ resolvedEx = checkExceptionResolutionTree(exceptionList, root);
if (resolvedEx != null) {
break;
@@ -432,56 +430,29 @@ public class GuardianGroupImpl implements GuardianGroup {
}
//Search for the root of the smallest subtree that contains all the concurrently signaled exceptions. If not found, return null.
- //FIXME: Check for equal exception classes on the tree
- //FIXME: Implement the Lowest common ancestor algorithm
- private GlobalExceptionInterface checkExceptionResolutionTree(List<GlobalExceptionInterface> exceptionList, Iterator elements, WrapperInteger currentListSize) {
-
- OMElement el;
- OMAttribute at;
- String exClass = null;
+ private GlobalExceptionInterface checkExceptionResolutionTree(List<GlobalExceptionInterface> exceptionList, OMElement rootTree) {
+
+ resolutionTreeUtils.setRoot(rootTree);
+ String ex1, ex2;
GlobalExceptionInterface resolvedEx = null;
- boolean isLeaf = false;
-
- while (elements.hasNext()) {
- el = (OMElement) elements.next();
-
- //<exception class="">
- if (el.getLocalName().equals(Constants.EXCEPTION)) {
-
- Iterator it = el.getAllAttributes();
- while (it.hasNext()) {
- at = (OMAttribute) it.next();
- if (at.getLocalName().equals(Constants.CLASS)) {
- exClass = at.getAttributeValue();
- }
- }
- try {
- for (GlobalExceptionInterface ex : exceptionList) {
- if (Class.forName(exClass).equals(ex.getClass())) {
- currentListSize.decrement();
- break;
- }
- }
+ ex1 = exceptionList.get(0).getClass().getName();
+ for (int i = 1; i < exceptionList.size(); i++) {
+ ex2 = exceptionList.get(i).getClass().getName();
- } catch (ClassNotFoundException ex1) {
- Logger.getLogger(GuardianGroupImpl.class.getName()).log(Level.SEVERE, null, ex1);
- }
-
- Iterator children = el.getChildElements();
- if (children.hasNext()) {
- resolvedEx = checkExceptionResolutionTree(exceptionList, children, currentListSize);
- } else {
- isLeaf = true;
- }
+ try {
+ ex1 = resolutionTreeUtils.getLowestCommonAncestor(ex1, ex2);
+ } catch (InvalidNodeException invalidNodeException) {
+ ex1 = null;
+ break;
}
}
- if (resolvedEx == null && currentListSize.getValue() == 0 && !isLeaf) {
+ if (ex1 != null) {
Class exceptionClass;
try {
- exceptionClass = Class.forName(exClass);
+ exceptionClass = Class.forName(ex1);
resolvedEx = (GlobalException) exceptionClass.newInstance();
for (GlobalExceptionInterface ex : exceptionList) {
@@ -495,8 +466,12 @@ public class GuardianGroupImpl implements GuardianGroup {
} catch (ClassNotFoundException ex) {
Logger.getLogger(GuardianGroupImpl.class.getName()).log(Level.SEVERE, null, ex);
}
+
+ return resolvedEx;
+
+ } else {
+ return null;
}
- return resolvedEx;
}
private List<GuardianMember> getMatchingParticipants(String regularExpression, GlobalExceptionInterface signaledException) {
@@ -516,16 +491,10 @@ public class GuardianGroupImpl implements GuardianGroup {
if (signaledException.getSignalingParticipants().contains(gm.getParticipantIdentifier())) {
matchingParticipants.add(gm);
}
-
- /*//All concurrent signaler were found
- if (matchingParticipants.size() == signaledException.getSignalingParticipants().size()) {
- break;
- }*/
}
} else if (regularExpression.toUpperCase().equals("!SIGNALER")) {
for (GuardianMember gm : guardianList) {
if (!signaledException.getSignalingParticipants().contains(gm.getParticipantIdentifier())) {
- //if (!gm.getParticipantIdentifier().equals(signaledException.getSignalingParticipant())) {
matchingParticipants.add(gm);
}
}
@@ -575,47 +544,11 @@ public class GuardianGroupImpl implements GuardianGroup {
if (signaledException.getSignalingParticipants().contains(gm.getParticipantIdentifier())) {
matchingParticipants.add(gm);
}
-
- /*//All concurrent signaler were found
- if (matchingParticipants.size() == signaledException.getSignalingParticipants().size()) {
- break;
- }*/
-
-// //ConcurrentGlobalException: there are more than one signaler
-// if (signaledException instanceof ConcurrentGlobalException) {
-// List<String> signalingPartcipants = ((ConcurrentGlobalException) signaledException).getSignalingParticipants();
-//
-// if (signalingPartcipants.contains(gm.getParticipantIdentifier())) {
-// matchingParticipants.add(gm);
-// count++;
-// }
-//
-// //All concurrent signaler were found
-// if (count == signalingPartcipants.size()) {
-// break;
-// }
-//
-// } else if (gm.getParticipantIdentifier().equals(signaledException.getSignalingParticipant())) {
-// matchingParticipants.add(gm);
-// break;
-// }
} //Test if the participant is not Signaler
else {
if (!signaledException.getSignalingParticipants().contains(gm.getParticipantIdentifier())) {
matchingParticipants.add(gm);
}
-
-// //ConcurrentGlobalException: there are more than one signaler
-// if (signaledException instanceof ConcurrentGlobalException) {
-// List<String> signalingPartcipants = ((ConcurrentGlobalException) signaledException).getSignalingParticipants();
-//
-// if (!(signalingPartcipants.contains(gm.getParticipantIdentifier()))) {
-// matchingParticipants.add(gm);
-// }
-//
-// } else if (!gm.getParticipantIdentifier().equals(signaledException.getSignalingParticipant())) {
-// matchingParticipants.add(gm);
-// }
}
}
}
@@ -625,37 +558,6 @@ public class GuardianGroupImpl implements GuardianGroup {
return matchingParticipants;
}
-// private List<GuardianMember> getMatchingParticipantsOriginal(String regularExpression, GlobalExceptionInterface signaledException) {
-// List<GuardianMember> matchingParticipants = new LinkedList();
-//
-// if (regularExpression.toUpperCase().equals("SIGNALER")) {
-// for (GuardianMember gm : guardianList) {
-// if (gm.getParticipantIdentifier().equals(signaledException.getSignalingParticipant())) {
-// matchingParticipants.add(gm);
-// break;
-// }
-// }
-// } else if (regularExpression.toUpperCase().equals("!SIGNALER")) {
-// for (GuardianMember gm : guardianList) {
-// if (!gm.getParticipantIdentifier().equals(signaledException.getSignalingParticipant())) {
-// matchingParticipants.add(gm);
-// }
-// }
-//
-// } else {
-// //Create an java regular expression
-// String re = createJavaRegularExpression(regularExpression);
-//
-// for (GuardianMember gm : guardianList) {
-// if (gm.getParticipantIdentifier().matches(re)) {
-// matchingParticipants.add(gm);
-// }
-// }
-// }
-//
-// return matchingParticipants;
-// }
-
/* Valid expressions: *, <Context>.*, <Context>, *.<Context>, *.<Context>.*,
* *.<Context>.*.<Context>.*, <REG_EXP> || <REG_EXP>
*
diff --git a/sandbox/dougsleite/guardian-model/src/main/java/org/apache/tuscany/sca/guardian/InvalidNodeException.java b/sandbox/dougsleite/guardian-model/src/main/java/org/apache/tuscany/sca/guardian/InvalidNodeException.java
new file mode 100644
index 0000000000..3df76b0596
--- /dev/null
+++ b/sandbox/dougsleite/guardian-model/src/main/java/org/apache/tuscany/sca/guardian/InvalidNodeException.java
@@ -0,0 +1,30 @@
+/*
+ * 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.guardian;
+
+public class InvalidNodeException extends RuntimeException {
+
+ public InvalidNodeException() {
+ super();
+ }
+
+ public InvalidNodeException(String message) {
+ super(message);
+ }
+}
diff --git a/sandbox/dougsleite/guardian-model/src/main/java/org/apache/tuscany/sca/guardian/ResolutionTreeUtils.java b/sandbox/dougsleite/guardian-model/src/main/java/org/apache/tuscany/sca/guardian/ResolutionTreeUtils.java
new file mode 100644
index 0000000000..e4bd6652c8
--- /dev/null
+++ b/sandbox/dougsleite/guardian-model/src/main/java/org/apache/tuscany/sca/guardian/ResolutionTreeUtils.java
@@ -0,0 +1,153 @@
+/*
+ * 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.guardian;
+
+import java.util.Collections;
+import java.util.Hashtable;
+import java.util.Iterator;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+import org.apache.axiom.om.OMAttribute;
+import org.apache.axiom.om.OMElement;
+
+public class ResolutionTreeUtils {
+
+ //E: Euler tour of the tree obtained by listing the nodes viseted in a depth firts search of the tree starting from the root. Contains 2n-1 elements
+ private List<String> eulerTour;
+ //L: Array of level numbers such that L[i] contains the tree-depth of the node E[i]. Contains 2n-1 elements
+ private List<Integer> levels;
+ //R: Map of size n such that R<K> contains the index of the first ocurrence of node 'K' in E
+ private Map<String, Integer> rMap;
+ private OMElement root;
+ private int treeSize;
+
+ public ResolutionTreeUtils() {
+ init(null);
+ }
+
+ public ResolutionTreeUtils(OMElement root) {
+ init(root);
+ }
+
+ public void setRoot(OMElement root) {
+ init(root);
+ }
+
+ public List<String> getEulerTourDepthFirstSearch() {
+
+ if (root == null) {
+ throw new NullPointerException("The root musn't be null");
+ }
+
+ if (eulerTour == null) {
+ eulerTour = new LinkedList<String>();
+ levels = new LinkedList<Integer>();
+
+ eulerTourDFSRecursive(root, 0);
+ }
+
+ return eulerTour;
+ }
+
+ public String getLowestCommonAncestor(String node1, String node2) {
+ String lca = null;
+ Integer indexNode1, indexNode2;
+
+ Map<String, Integer> r = getRMap();
+
+ indexNode1 = r.get(node1);
+ indexNode2 = r.get(node2);
+
+ //Check nodes existence
+ if (indexNode1 == null && indexNode2 == null) {
+ throw new InvalidNodeException("Could not find the specified nodes: " + node1 + " and " + node2);
+ } else if (indexNode1 == null) {
+ throw new InvalidNodeException("Could not find the specified nodes: " + node1);
+ } else if (indexNode2 == null) {
+ throw new InvalidNodeException("Could not find the specified nodes: " + node2);
+ }
+
+ int indexLCA;
+ if (indexNode1 < indexNode2) {
+ indexLCA = getRangeMinimumQuery(levels, indexNode1, indexNode2);
+ } else {
+ indexLCA = getRangeMinimumQuery(levels, indexNode2, indexNode1);
+ }
+
+ lca = eulerTour.get(indexLCA);
+
+ return lca;
+ }
+
+ //Get the index of the smallest element between beginIndex and endIndex (both inclusive) in the list
+ private int getRangeMinimumQuery(List list, int beginIndex, int endIndex) {
+
+ List sublist = list.subList(beginIndex, endIndex + 1);
+
+ Object elem = Collections.min(sublist);
+
+ return sublist.indexOf(elem) + beginIndex;
+ }
+
+ private void init(OMElement root) {
+ this.root = root;
+ eulerTour = null;
+ levels = null;
+ rMap = null;
+ treeSize = 0;
+ }
+
+ private void eulerTourDFSRecursive(OMElement node, int level) {
+ String classAttribute = ((OMAttribute) node.getAllAttributes().next()).getAttributeValue();
+ eulerTour.add(classAttribute);
+
+ levels.add(level);
+ treeSize++;
+
+ Iterator children = node.getChildElements();
+
+ OMElement child;
+ while (children.hasNext()) {
+ child = (OMElement) children.next();
+ eulerTourDFSRecursive(child, level + 1);
+ eulerTour.add(classAttribute);
+ levels.add(level);
+ }
+ }
+
+ private Map<String, Integer> getRMap() {
+ if (rMap == null) {
+ rMap = new Hashtable<String, Integer>();
+
+ List<String> tour = getEulerTourDepthFirstSearch();
+ for (int i = 0; i < tour.size(); i++) {
+ String key = tour.get(i);
+ if (!rMap.containsKey(key)) {
+ rMap.put(key, i);
+ }
+
+ if (rMap.size() == treeSize) {
+ break;
+ }
+ }
+ }
+ return rMap;
+ }
+}
diff --git a/sandbox/dougsleite/guardian-model/src/main/resources/lcaTest.xml b/sandbox/dougsleite/guardian-model/src/main/resources/lcaTest.xml
new file mode 100644
index 0000000000..e528760ad8
--- /dev/null
+++ b/sandbox/dougsleite/guardian-model/src/main/resources/lcaTest.xml
@@ -0,0 +1,21 @@
+<resolution_trees>
+ <resolution_tree exception_level="1">
+ <exception class="Exception1">
+ <exception class="Exception2">
+ <exception class="Exception4"/>
+ <exception class="Exception5"/>
+ </exception>
+ <exception class="Exception3">
+ <exception class="Exception6"/>
+ <exception class="Exception7"/>
+ <exception class="Exception8"/>
+ </exception>
+ </exception>
+ </resolution_tree>
+</resolution_trees>
+
+
+
+
+
+
diff --git a/sandbox/dougsleite/guardian-model/src/test/java/org/apache/tuscany/sca/guardian/itests/LCATestCase.java b/sandbox/dougsleite/guardian-model/src/test/java/org/apache/tuscany/sca/guardian/itests/LCATestCase.java
new file mode 100644
index 0000000000..bdcb7ac97d
--- /dev/null
+++ b/sandbox/dougsleite/guardian-model/src/test/java/org/apache/tuscany/sca/guardian/itests/LCATestCase.java
@@ -0,0 +1,114 @@
+/*
+ * 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.guardian.itests;
+
+import java.io.FileInputStream;
+import org.apache.tuscany.sca.policy.resolutiontrees.*;
+import org.apache.tuscany.sca.guardian.ResolutionTreeUtils;
+import java.util.Collection;
+import java.util.LinkedList;
+import java.util.Map;
+import javax.xml.stream.XMLInputFactory;
+import javax.xml.stream.XMLStreamReader;
+import org.junit.Test;
+import org.apache.axiom.om.OMElement;
+import java.util.List;
+import junit.framework.Assert;
+import org.junit.Before;
+
+public class LCATestCase {
+
+ private ResolutionTreeUtils treeUtils;
+
+ @Before
+ public void init() throws Exception {
+ ResolutionTreesPolicyProcessor processor = new ResolutionTreesPolicyProcessor(null, null);
+
+ FileInputStream fileInputStream = new FileInputStream("src/main/resources/lcaTest.xml");
+ XMLStreamReader reader = XMLInputFactory.newInstance().createXMLStreamReader(fileInputStream);
+
+
+ ResolutionTreesPolicy policy = processor.read(reader);
+ Map<String, OMElement> resolutionTrees = policy.getResolutionTreeElements();
+
+ List<OMElement> rootElements = getRootElements(resolutionTrees.values());
+
+ treeUtils = new ResolutionTreeUtils();
+ treeUtils.setRoot(rootElements.get(0));
+ }
+
+ @Test
+ public void testLCAEx2Ex2() throws Exception {
+ String lca = treeUtils.getLowestCommonAncestor("Exception2", "Exception2");
+ System.out.println("lca: " + lca);
+ Assert.assertEquals("Exception2", lca);
+ }
+
+ @Test
+ public void testLCAEx2Ex3() throws Exception {
+ String lca = treeUtils.getLowestCommonAncestor("Exception2", "Exception3");
+ Assert.assertEquals("Exception1", lca);
+ }
+
+ @Test
+ public void testLCAEx2Ex8() throws Exception {
+ String lca = treeUtils.getLowestCommonAncestor("Exception2", "Exception8");
+ Assert.assertEquals("Exception1", lca);
+ }
+
+ @Test
+ public void testLCAEx4Ex3() throws Exception {
+ String lca = treeUtils.getLowestCommonAncestor("Exception4", "Exception3");
+ Assert.assertEquals("Exception1", lca);
+ }
+
+ @Test
+ public void testLCAEx4Ex5() throws Exception {
+ String lca = treeUtils.getLowestCommonAncestor("Exception4", "Exception5");
+ Assert.assertEquals("Exception2", lca);
+ }
+
+ @Test
+ public void testLCAEx6Ex7() throws Exception {
+ String lca = treeUtils.getLowestCommonAncestor("Exception6", "Exception7");
+ Assert.assertEquals("Exception3", lca);
+ }
+
+ @Test
+ public void testLCAEx1Ex8() throws Exception {
+ String lca = treeUtils.getLowestCommonAncestor("Exception1", "Exception8");
+ Assert.assertEquals("Exception1", lca);
+ }
+
+ @Test
+ public void testLCAEx2Ex5() throws Exception {
+ String lca = treeUtils.getLowestCommonAncestor("Exception2", "Exception5");
+ Assert.assertEquals("Exception2", lca);
+ }
+
+ private List<OMElement> getRootElements(Collection<OMElement> resolutionTrees) {
+ List<OMElement> rootElements = new LinkedList<OMElement>();
+
+ for (OMElement resolutionTree : resolutionTrees) {
+ rootElements.add(resolutionTree.getFirstElement());
+ }
+
+ return rootElements;
+ }
+}
diff --git a/sandbox/dougsleite/guardian-model/src/test/java/org/apache/tuscany/sca/guardian/itests/concurrentexceptions/Launch.java b/sandbox/dougsleite/guardian-model/src/test/java/org/apache/tuscany/sca/guardian/itests/concurrentexceptions/Launch.java
index ff9a0e0b4b..9ac2e9113b 100644
--- a/sandbox/dougsleite/guardian-model/src/test/java/org/apache/tuscany/sca/guardian/itests/concurrentexceptions/Launch.java
+++ b/sandbox/dougsleite/guardian-model/src/test/java/org/apache/tuscany/sca/guardian/itests/concurrentexceptions/Launch.java
@@ -46,6 +46,12 @@ public class Launch {
System.in.read();
+ System.out.println("Starting participant4...");
+ Node c4 = scaDomain.getService(Node.class, "Participant4");
+ c4.execute();
+
+ System.in.read();
+
System.out.println("Forcing exception ocurrence at participant1...");
TestInterface t = scaDomain.getService(TestInterface.class, "Participant1");
t.forcePrimaryServiceFailureException();