Move Eclipse 3 components to legacy.

[lgpl/argeo-commons.git] / legacy / org.argeo.cms.ui.workbench / src / org / argeo / cms / ui / workbench / internal / useradmin / providers / UserTransactionProvider.java

diff --git a/legacy/org.argeo.cms.ui.workbench/src/org/argeo/cms/ui/workbench/internal/useradmin/providers/UserTransactionProvider.java b/legacy/org.argeo.cms.ui.workbench/src/org/argeo/cms/ui/workbench/internal/useradmin/providers/UserTransactionProvider.java
new file mode 100644 (file)
index 0000000..a53cfb2
--- /dev/null
+++ b/legacy/org.argeo.cms.ui.workbench/src/org/argeo/cms/ui/workbench/internal/useradmin/providers/UserTransactionProvider.java
@@ -0,0 +1,74 @@
+package org.argeo.cms.ui.workbench.internal.useradmin.providers;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import javax.transaction.Status;
+import javax.transaction.UserTransaction;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.argeo.cms.CmsException;
+import org.argeo.cms.ui.workbench.WorkbenchUiPlugin;
+import org.eclipse.ui.AbstractSourceProvider;
+import org.eclipse.ui.ISources;
+
+/** Observe and notify UI on UserTransaction state changes */
+public class UserTransactionProvider extends AbstractSourceProvider {
+       private final static Log log = LogFactory
+                       .getLog(UserTransactionProvider.class);
+
+       public final static String TRANSACTION_STATE = WorkbenchUiPlugin.PLUGIN_ID
+                       + ".userTransactionState";
+       public final static String STATUS_ACTIVE = "status.active";
+       public final static String STATUS_NO_TRANSACTION = "status.noTransaction";
+
+       /* DEPENDENCY INJECTION */
+       private UserTransaction userTransaction;
+
+       @Override
+       public String[] getProvidedSourceNames() {
+               return new String[] { TRANSACTION_STATE };
+       }
+
+       @Override
+       public Map<String, String> getCurrentState() {
+               Map<String, String> currentState = new HashMap<String, String>(1);
+               currentState.put(TRANSACTION_STATE, getInternalCurrentState());
+               return currentState;
+       }
+
+       @Override
+       public void dispose() {
+       }
+
+       private String getInternalCurrentState() {
+               try {
+                       String transactionState;
+                       if (userTransaction.getStatus() == Status.STATUS_NO_TRANSACTION)
+                               transactionState = STATUS_NO_TRANSACTION;
+                       else
+                               // if (userTransaction.getStatus() == Status.STATUS_ACTIVE)
+                               transactionState = STATUS_ACTIVE;
+                       return transactionState;
+               } catch (Exception e) {
+                       throw new CmsException("Unable to begin transaction", e);
+               }
+       }
+
+       /** Publishes the ability to notify a state change */
+       public void fireTransactionStateChange() {
+               try {
+                       fireSourceChanged(ISources.WORKBENCH, TRANSACTION_STATE,
+                                       getInternalCurrentState());
+               } catch (Exception e) {
+                       log.warn("Cannot fire transaction state change event. Caught exception: "
+                                       + e.getClass().getCanonicalName() + " - " + e.getMessage());
+               }
+       }
+
+       /* DEPENDENCY INJECTION */
+       public void setUserTransaction(UserTransaction userTransaction) {
+               this.userTransaction = userTransaction;
+       }
+}