binding/mdsal-binding-util/src/main/java/org/opendaylight/mdsal/binding/util/WriteTrackingReadWriteTransaction.java

   1 /*
   2  * Copyright © 2018 Red Hat, Inc. and others.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.mdsal.binding.util;
   9
  10 import org.opendaylight.mdsal.binding.api.ReadWriteTransaction;
  11 import org.opendaylight.mdsal.binding.spi.ForwardingReadWriteTransaction;
  12 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  13 import org.opendaylight.yangtools.yang.binding.DataObject;
  14 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  15
  16 /**
  17  * Read-write transaction which keeps track of writes.
  18  */
  19 final class WriteTrackingReadWriteTransaction extends ForwardingReadWriteTransaction
  20         implements WriteTrackingTransaction {
  21     // This is volatile to ensure we get the latest value; transactions aren't supposed to be used in multiple threads,
  22     // but the cost here is tiny (one read penalty at the end of a transaction) so we play it safe
  23     private volatile boolean written;
  24
  25     WriteTrackingReadWriteTransaction(final ReadWriteTransaction delegate) {
  26         super(delegate);
  27     }
  28
  29     @Override
  30     public <T extends DataObject> void put(final LogicalDatastoreType store, final InstanceIdentifier<T> path,
  31             final T data) {
  32         super.put(store, path, data);
  33         written = true;
  34     }
  35
  36     @Override
  37     public <T extends DataObject> void mergeParentStructurePut(final LogicalDatastoreType store,
  38             final InstanceIdentifier<T> path, final T data) {
  39         super.mergeParentStructurePut(store, path, data);
  40         written = true;
  41     }
  42
  43     @Override
  44     public <T extends DataObject> void merge(final LogicalDatastoreType store, final InstanceIdentifier<T> path,
  45             final T data) {
  46         super.merge(store, path, data);
  47         written = true;
  48     }
  49
  50     @Override
  51     public <T extends DataObject> void mergeParentStructureMerge(final LogicalDatastoreType store,
  52             final InstanceIdentifier<T> path, final T data) {
  53         super.mergeParentStructureMerge(store, path, data);
  54         written = true;
  55     }
  56
  57     @Override
  58     public void delete(final LogicalDatastoreType store, final InstanceIdentifier<?> path) {
  59         super.delete(store, path);
  60         written = true;
  61     }
  62
  63     @Override
  64     public boolean isWritten() {
  65         return written;
  66     }
  67 }