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.restconf.nb.rfc8040.handlers.TransactionChainHandler;
  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 FluentFuture<? extends CommitInfo> future = submitData(transactionNode.getTransactionChainHandler(),
  39                 transactionNode.getInstanceIdentifier().getInstanceIdentifier());
  40         final ResponseFactory response = new ResponseFactory(Status.NO_CONTENT);
  41         FutureCallbackTx.addCallback(future, RestconfDataServiceConstant.DeleteData.DELETE_TX_TYPE, response);
  42         return response.build();
  43     }
  44
  45     /**
  46      * Delete data via transaction. Return error if data to delete does not exist.
  47      *
  48      * @param transactionChainHandler
  49      *             transaction chain handler
  50      * @param readWriteTx
  51      *             read and write transaction
  52      * @param path
  53      *             path of data to delete
  54      * @return {@link FluentFuture}
  55      */
  56     private static FluentFuture<? extends CommitInfo> submitData(
  57             final TransactionChainHandler transactionChainHandler, final YangInstanceIdentifier path) {
  58         final DOMDataTreeReadWriteTransaction readWriteTx = transactionChainHandler.get().newReadWriteTransaction();
  59         TransactionUtil.checkItemExists(transactionChainHandler, readWriteTx, LogicalDatastoreType.CONFIGURATION, path,
  60                 RestconfDataServiceConstant.DeleteData.DELETE_TX_TYPE);
  61         readWriteTx.delete(LogicalDatastoreType.CONFIGURATION, path);
  62         return readWriteTx.commit();
  63     }
  64 }