X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.db%2Fsrc%2Forg%2Fsimantics%2Fdb%2Fservice%2FTransactionPolicySupport.java;fp=bundles%2Forg.simantics.db%2Fsrc%2Forg%2Fsimantics%2Fdb%2Fservice%2FTransactionPolicySupport.java;h=6b59b05220f2ec6b6d3a5a6faebdea95f849a9a1;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

diff --git a/bundles/org.simantics.db/src/org/simantics/db/service/TransactionPolicySupport.java b/bundles/org.simantics.db/src/org/simantics/db/service/TransactionPolicySupport.java
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index 000000000..6b59b0522
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+++ b/bundles/org.simantics.db/src/org/simantics/db/service/TransactionPolicySupport.java
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+/*******************************************************************************
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.db.service;
+
+
+
+public interface TransactionPolicySupport {
+    
+    /**
+     * Called when read transaction ends to decide if client should release
+     * the transaction. 
+     * 
+     * @return true if you want to keep the transaction. 
+     */
+    boolean holdOnToTransactionAfterRead();
+
+    /**
+     * Called when transaction is cancelled to decide if client should release
+     * the transaction.
+     * 
+     * @return true if you want to keep the transaction. 
+     */
+    boolean holdOnToTransactionAfterCancel();
+
+    /**
+     * Called when write transaction ends to decided if client should release
+     * the transaction. 
+     * 
+     * @return true if you want to keep the transaction. 
+     */
+    boolean holdOnToTransactionAfterCommit();
+
+    /**
+     * Called when server asks us to relinquish the transaction. This should
+     * trigger the end of ongoing requests. The caller (and server) will wait
+     * until the requests are ended and the transaction is freed. You have to
+     * end the requests during the call. If you do then onRelinquishDone is
+     * called and you can ask for a transaction again. If you do not then the
+     * connection is closed and all uncommitted work is lost. After connection
+     * is closed onRelinquishError is called giving you a chance to clean up the
+     * mess.
+     */
+    void onRelinquish();
+
+    /**
+     * Called after server has been sent the reply to relinquish message. This
+     * means that you can ask transaction again.
+     */
+    void onRelinquishDone();
+
+    /**
+     * Called after onRelinquish has failed to end requests. This means that the
+     * connection has been closed and all uncommitted work has been lost.
+     */
+    void onRelinquishError();
+}