restconf/restconf-nb-rfc8040/src/main/java/org/opendaylight/restconf/nb/rfc8040/rests/utils/DeleteDataTransactionUtil.java

   1 /*
   2  * Copyright (c) 2016 Cisco Systems, Inc. and others.  All rights reserved.
   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.restconf.nb.rfc8040.rests.utils;
   9
  10 import com.google.common.util.concurrent.FluentFuture;
  11 import javax.ws.rs.core.Response;
  12 import javax.ws.rs.core.Response.Status;
  13 import org.opendaylight.mdsal.common.api.CommitInfo;
  14 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  15 import org.opendaylight.mdsal.dom.api.DOMDataTreeReadWriteTransaction;
  16 import org.opendaylight.mdsal.dom.api.DOMTransactionChain;
  17 import org.opendaylight.restconf.nb.rfc8040.rests.transactions.TransactionVarsWrapper;
  18 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  19
  20 /**
  21  * Util class for delete specific data in config DS.
  22  *
  23  */
  24 public final class DeleteDataTransactionUtil {
  25
  26     private DeleteDataTransactionUtil() {
  27         throw new UnsupportedOperationException("Util class.");
  28     }
  29
  30     /**
  31      * Delete data from DS via transaction.
  32      *
  33      * @param transactionNode
  34      *             Wrapper for data of transaction
  35      * @return {@link Response}
  36      */
  37     public static Response deleteData(final TransactionVarsWrapper transactionNode) {
  38         final DOMTransactionChain transactionChain = transactionNode.getTransactionChainHandler().get();
  39         final FluentFuture<? extends CommitInfo> future = submitData(transactionChain,
  40                 transactionNode.getInstanceIdentifier().getInstanceIdentifier());
  41         final ResponseFactory response = new ResponseFactory(Status.NO_CONTENT);
  42         //This method will close transactionChain
  43         FutureCallbackTx.addCallback(future, RestconfDataServiceConstant.DeleteData.DELETE_TX_TYPE, response,
  44                 transactionChain);
  45         return response.build();
  46     }
  47
  48     /**
  49      * Delete data via transaction. Return error if data to delete does not exist.
  50      *
  51      * @param transactionChain
  52      *             transaction chain
  53      * @param path
  54      *             path of data to delete
  55      * @return {@link FluentFuture}
  56      */
  57     private static FluentFuture<? extends CommitInfo> submitData(
  58             final DOMTransactionChain transactionChain, final YangInstanceIdentifier path) {
  59         final DOMDataTreeReadWriteTransaction readWriteTx = transactionChain.newReadWriteTransaction();
  60         TransactionUtil.checkItemExists(transactionChain, readWriteTx, LogicalDatastoreType.CONFIGURATION, path,
  61                 RestconfDataServiceConstant.DeleteData.DELETE_TX_TYPE);
  62         readWriteTx.delete(LogicalDatastoreType.CONFIGURATION, path);
  63         return readWriteTx.commit();
  64     }
  65 }