netconf/sal-netconf-connector/src/main/java/org/opendaylight/netconf/sal/connect/netconf/sal/tx/ReadOnlyTx.java

   1 /*
   2  * Copyright (c) 2014 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.netconf.sal.connect.netconf.sal.tx;
   9
  10 import com.google.common.util.concurrent.FluentFuture;
  11 import com.google.common.util.concurrent.FutureCallback;
  12 import com.google.common.util.concurrent.Futures;
  13 import com.google.common.util.concurrent.ListenableFuture;
  14 import com.google.common.util.concurrent.MoreExecutors;
  15 import com.google.common.util.concurrent.SettableFuture;
  16 import java.util.Optional;
  17 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  18 import org.opendaylight.mdsal.common.api.ReadFailedException;
  19 import org.opendaylight.mdsal.dom.api.DOMDataTreeReadTransaction;
  20 import org.opendaylight.netconf.sal.connect.netconf.util.NetconfBaseOps;
  21 import org.opendaylight.netconf.sal.connect.netconf.util.NetconfRpcFutureCallback;
  22 import org.opendaylight.netconf.sal.connect.util.RemoteDeviceId;
  23 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  24 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  25 import org.slf4j.Logger;
  26 import org.slf4j.LoggerFactory;
  27
  28 public final class ReadOnlyTx implements DOMDataTreeReadTransaction {
  29
  30     private static final Logger LOG  = LoggerFactory.getLogger(ReadOnlyTx.class);
  31
  32     private final NetconfBaseOps netconfOps;
  33     private final RemoteDeviceId id;
  34
  35     public ReadOnlyTx(final NetconfBaseOps netconfOps, final RemoteDeviceId id) {
  36         this.netconfOps = netconfOps;
  37         this.id = id;
  38     }
  39
  40     private FluentFuture<Optional<NormalizedNode<?, ?>>> readConfigurationData(
  41             final YangInstanceIdentifier path) {
  42         return remapException(netconfOps.getConfigRunningData(
  43             new NetconfRpcFutureCallback("Data read", id), Optional.ofNullable(path)));
  44     }
  45
  46     private FluentFuture<Optional<NormalizedNode<?, ?>>> readOperationalData(
  47             final YangInstanceIdentifier path) {
  48         return remapException(netconfOps.getData(
  49             new NetconfRpcFutureCallback("Data read", id), Optional.ofNullable(path)));
  50     }
  51
  52     private static <T> FluentFuture<T> remapException(final ListenableFuture<T> input) {
  53         final SettableFuture<T> ret = SettableFuture.create();
  54         Futures.addCallback(input, new FutureCallback<T>() {
  55
  56             @Override
  57             public void onSuccess(final T result) {
  58                 ret.set(result);
  59             }
  60
  61             @Override
  62             public void onFailure(final Throwable cause) {
  63                 ret.setException(cause instanceof ReadFailedException ? cause
  64                         : new ReadFailedException("NETCONF operation failed", cause));
  65             }
  66         }, MoreExecutors.directExecutor());
  67         return FluentFuture.from(ret);
  68     }
  69
  70     @Override
  71     public void close() {
  72         // NOOP
  73     }
  74
  75     @Override
  76     public FluentFuture<Optional<NormalizedNode<?, ?>>> read(final LogicalDatastoreType store,
  77             final YangInstanceIdentifier path) {
  78         switch (store) {
  79             case CONFIGURATION:
  80                 return readConfigurationData(path);
  81             case OPERATIONAL:
  82                 return readOperationalData(path);
  83             default:
  84                 LOG.info("Unknown datastore type: {}.", store);
  85                 throw new IllegalArgumentException(String.format(
  86                     "%s, Cannot read data %s for %s datastore, unknown datastore type", id, path, store));
  87         }
  88     }
  89
  90     @Override
  91     public FluentFuture<Boolean> exists(final LogicalDatastoreType store, final YangInstanceIdentifier path) {
  92         return read(store, path).transform(optionalNode -> optionalNode != null && optionalNode.isPresent(),
  93                 MoreExecutors.directExecutor());
  94     }
  95
  96     @Override
  97     public Object getIdentifier() {
  98         return this;
  99     }
 100 }