1 files changed, 252 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0.1-RC1/modules/policy-transaction-runtime/src/main/java/org/apache/tuscany/sca/policy/transaction/runtime/TransactionManagerHelper.java b/sca-java-2.x/tags/2.0.1-RC1/modules/policy-transaction-runtime/src/main/java/org/apache/tuscany/sca/policy/transaction/runtime/TransactionManagerHelper.java
new file mode 100644
index 0000000000..6d67e51bd7
--- /dev/null
+++ b/sca-java-2.x/tags/2.0.1-RC1/modules/policy-transaction-runtime/src/main/java/org/apache/tuscany/sca/policy/transaction/runtime/TransactionManagerHelper.java
@@ -0,0 +1,252 @@
+/*
+ * 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.policy.transaction.runtime;
+
+import java.lang.reflect.InvocationTargetException;
+
+import javax.transaction.HeuristicMixedException;
+import javax.transaction.HeuristicRollbackException;
+import javax.transaction.InvalidTransactionException;
+import javax.transaction.NotSupportedException;
+import javax.transaction.RollbackException;
+import javax.transaction.Status;
+import javax.transaction.SystemException;
+import javax.transaction.Transaction;
+import javax.transaction.TransactionManager;
+
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.core.UtilityExtensionPoint;
+
+/**
+ * @version $Rev$ $Date$
+ */
+public class TransactionManagerHelper {
+    // private static final Logger logger = Logger.getLogger(TransactionManagerHelper.class.getName());
+
+    private TransactionManager tm;
+
+    public TransactionManagerHelper(ExtensionPointRegistry registry) {
+        super();
+        UtilityExtensionPoint utilities = registry.getExtensionPoint(UtilityExtensionPoint.class);
+        this.tm = utilities.getUtility(TransactionManager.class);
+    }
+    
+    public TransactionManagerHelper(TransactionManager tm) {
+        super();
+        this.tm = tm;
+    }
+
+    public Transaction managedGlobalTransactionPreInvoke() throws SystemException, NotSupportedException {
+        int status = tm.getStatus();
+        if (status == Status.STATUS_COMMITTED || status == Status.STATUS_NO_TRANSACTION
+            || status == Status.STATUS_ROLLEDBACK) {
+            tm.begin();
+            return tm.getTransaction();
+        }
+        return null;
+    }
+
+    public void managedGlobalTransactionPostInvoke(Transaction created, boolean rollback)
+        throws InvalidTransactionException, IllegalStateException, SystemException, SecurityException,
+        HeuristicMixedException, HeuristicRollbackException, RollbackException {
+        if (created != null) {
+            int status = created.getStatus();
+            if (status == Status.STATUS_MARKED_ROLLBACK) {
+                created.rollback();
+            } else if (status == Status.STATUS_ACTIVE) {
+                if (rollback) {
+                    created.rollback();
+                } else {
+                    created.commit();
+                }
+            }
+        }
+    }
+
+    public Transaction suspendsTransactionPreInvoke() throws SystemException {
+        if (tm.getTransaction() != null) {
+            return tm.suspend();
+        } else {
+            return null;
+        }
+    }
+
+    public void suspendsTransactionPostInvoke(Transaction suspended) throws InvalidTransactionException,
+        IllegalStateException, SystemException {
+        if (suspended != null) {
+            tm.resume(suspended);
+        }
+    }
+
+    public TransactionManager getTransactionManager() {
+        return tm;
+    }
+
+    public void setTransactionManager(TransactionManager tm) {
+        this.tm = tm;
+    }
+
+    public void validateOneway(TransactionIntent onewayIntent, TransactionIntent implIntent)
+        throws IncompatibleIntentException {
+        if (onewayIntent == TransactionIntent.transactedOneWay) {
+            if (implIntent != TransactionIntent.managedTransactionGlobal) {
+                throw new IncompatibleIntentException(onewayIntent + "<-X->" + implIntent);
+            }
+        }
+    }
+
+    public void validateInbound(TransactionIntent serviceIntent, TransactionIntent implIntent)
+        throws IncompatibleIntentException {
+        if (serviceIntent == TransactionIntent.propagatesTransacton) {
+            if (implIntent != TransactionIntent.managedTransactionGlobal) {
+                throw new IncompatibleIntentException(serviceIntent + "<-X->" + implIntent);
+            }
+        }
+    }
+
+    public void validateOutbound(TransactionIntent referenceIntent, TransactionIntent implIntent)
+        throws IncompatibleIntentException {
+        if (referenceIntent == TransactionIntent.propagatesTransacton) {
+            if (implIntent != TransactionIntent.managedTransactionGlobal) {
+                throw new IncompatibleIntentException(referenceIntent + "<-X->" + implIntent);
+            }
+        }
+    }
+
+    public <T> T handlesOutbound(TransactionIntent referenceIntent,
+                                 TransactionIntent implIntent,
+                                 TransactionalAction<T> action) throws Exception {
+
+        if (implIntent == null) {
+            implIntent = TransactionIntent.noManagedTransaction;
+        }
+
+        if (referenceIntent == TransactionIntent.propagatesTransacton) {
+            if (implIntent != TransactionIntent.managedTransactionGlobal) {
+                throw new IncompatibleIntentException(referenceIntent + "<-X->" + implIntent);
+            } else {
+                // propagates the current TX
+                return run(action);
+            }
+        } else if (referenceIntent == TransactionIntent.suspendsTransaction) {
+            Transaction tx = suspendsTransactionPreInvoke();
+            try {
+                return run(action);
+            } finally {
+                suspendsTransactionPostInvoke(tx);
+            }
+        } else {
+            return run(action);
+        }
+    }
+
+    private <T> T run(TransactionalAction<T> action) throws Exception {
+        // Make sure a global TX is in place
+        Transaction tx = managedGlobalTransactionPreInvoke();
+        boolean rollback = false;
+        try {
+            return action.run();
+        } catch (InvocationTargetException e) {
+            throw e;
+        } catch (Throwable e) {
+            rollback = true;
+            if (e instanceof Error) {
+                throw (Error)e;
+            } else if (e instanceof RuntimeException) {
+                throw (RuntimeException)e;
+            } else {
+                throw (Exception)e;
+            }
+        } finally {
+            managedGlobalTransactionPostInvoke(tx, rollback);
+        }
+    }
+
+    public <T> T handlesInbound(TransactionIntent serviceIntent,
+                                TransactionIntent implIntent,
+                                TransactionalAction<T> action) throws Exception {
+        if (serviceIntent == null && implIntent == null) {
+            return run(action);
+        }
+
+        if (implIntent == null) {
+            implIntent = TransactionIntent.noManagedTransaction;
+        }
+
+        if (serviceIntent == TransactionIntent.propagatesTransacton) {
+            if (implIntent != TransactionIntent.managedTransactionGlobal) {
+                throw new IncompatibleIntentException(serviceIntent + "<-X->" + implIntent);
+            } else {
+                return run(action);
+            }
+        } else if (serviceIntent == TransactionIntent.suspendsTransaction) {
+            Transaction tx1 = suspendsTransactionPreInvoke();
+            try {
+                if (implIntent == TransactionIntent.managedTransactionGlobal) {
+                    return run(action);
+                } else {
+                    return action.run();
+                }
+            } finally {
+                suspendsTransactionPostInvoke(tx1);
+            }
+        } else {
+            if (implIntent == TransactionIntent.managedTransactionGlobal) {
+                // Start a new TX
+                return run(action);
+            } else {
+                return action.run();
+            }
+        }
+    }
+
+    public <T> void handlesOneWay(TransactionIntent onewayIntent,
+                                  TransactionIntent implIntent,
+                                  TransactionalAction<T> action) throws Exception {
+        if (implIntent == null) {
+            implIntent = TransactionIntent.noManagedTransaction;
+        }
+
+        if (onewayIntent == null) {
+            // Assume transactedOneWay
+            run(action);
+            return;
+        }
+
+        if (onewayIntent == TransactionIntent.transactedOneWay) {
+            if (implIntent != TransactionIntent.managedTransactionGlobal) {
+                throw new IncompatibleIntentException(onewayIntent + "<-X->" + implIntent);
+            } else {
+                run(action);
+                return;
+            }
+        } else {
+            // TransactionIntent.immediateOneWay
+            Transaction tx = suspendsTransactionPreInvoke();
+            try {
+                run(action);
+                return;
+            } finally {
+                suspendsTransactionPostInvoke(tx);
+            }
+        }
+    }
+
+}