opendaylight/md-sal/sal-binding-broker/src/main/java/org/opendaylight/controller/md/sal/binding/impl/LazyDOMRpcResultFuture.java

   1 /*
   2  * Copyright (c) 2015 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.controller.md.sal.binding.impl;
   9
  10 import static java.util.Objects.requireNonNull;
  11
  12 import com.google.common.base.Throwables;
  13 import com.google.common.util.concurrent.CheckedFuture;
  14 import com.google.common.util.concurrent.ListenableFuture;
  15 import java.util.concurrent.ExecutionException;
  16 import java.util.concurrent.Executor;
  17 import java.util.concurrent.TimeUnit;
  18 import java.util.concurrent.TimeoutException;
  19 import org.opendaylight.controller.md.sal.dom.api.DOMRpcException;
  20 import org.opendaylight.controller.md.sal.dom.api.DOMRpcResult;
  21 import org.opendaylight.controller.md.sal.dom.spi.DefaultDOMRpcResult;
  22 import org.opendaylight.mdsal.binding.dom.adapter.BindingRpcFutureAware;
  23 import org.opendaylight.mdsal.binding.dom.codec.api.BindingNormalizedNodeSerializer;
  24 import org.opendaylight.yangtools.yang.binding.DataContainer;
  25 import org.opendaylight.yangtools.yang.common.RpcResult;
  26 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  27
  28 @Deprecated(forRemoval = true)
  29 final class LazyDOMRpcResultFuture implements CheckedFuture<DOMRpcResult, DOMRpcException>, BindingRpcFutureAware {
  30
  31     private final ListenableFuture<RpcResult<?>> bindingFuture;
  32     private final BindingNormalizedNodeSerializer codec;
  33     private volatile DOMRpcResult result;
  34
  35     private LazyDOMRpcResultFuture(final ListenableFuture<RpcResult<?>> delegate,
  36             final BindingNormalizedNodeSerializer codec) {
  37         this.bindingFuture = requireNonNull(delegate, "delegate");
  38         this.codec = requireNonNull(codec, "codec");
  39     }
  40
  41     static CheckedFuture<DOMRpcResult, DOMRpcException> create(final BindingNormalizedNodeSerializer codec,
  42             final ListenableFuture<RpcResult<?>> bindingResult) {
  43         return new LazyDOMRpcResultFuture(bindingResult, codec);
  44     }
  45
  46     @Override
  47     public ListenableFuture<RpcResult<?>> getBindingFuture() {
  48         return bindingFuture;
  49     }
  50
  51     @Override
  52     public boolean cancel(final boolean mayInterruptIfRunning) {
  53         return bindingFuture.cancel(mayInterruptIfRunning);
  54     }
  55
  56     @Override
  57     public void addListener(final Runnable listener, final Executor executor) {
  58         bindingFuture.addListener(listener, executor);
  59     }
  60
  61     @Override
  62     public DOMRpcResult get() throws InterruptedException, ExecutionException {
  63         if (result != null) {
  64             return result;
  65         }
  66         return transformIfNecessary(bindingFuture.get());
  67     }
  68
  69     @Override
  70     public DOMRpcResult get(final long timeout, final TimeUnit unit) throws InterruptedException, ExecutionException,
  71             TimeoutException {
  72         if (result != null) {
  73             return result;
  74         }
  75         return transformIfNecessary(bindingFuture.get(timeout, unit));
  76     }
  77
  78     @Override
  79     public DOMRpcResult checkedGet() {
  80         try {
  81             return get();
  82         } catch (InterruptedException | ExecutionException e) {
  83             // FIXME: Add exception mapping
  84             throw Throwables.propagate(e);
  85         }
  86     }
  87
  88     @Override
  89     public DOMRpcResult checkedGet(final long timeout, final TimeUnit unit) throws TimeoutException {
  90         try {
  91             return get(timeout, unit);
  92         } catch (InterruptedException | ExecutionException e) {
  93             // FIXME: Add exception mapping
  94             throw Throwables.propagate(e);
  95         }
  96     }
  97
  98     @Override
  99     public boolean isCancelled() {
 100         return bindingFuture.isCancelled();
 101     }
 102
 103     @Override
 104     public boolean isDone() {
 105         return bindingFuture.isDone();
 106     }
 107
 108     private synchronized DOMRpcResult transformIfNecessary(final RpcResult<?> input) {
 109         if (result == null) {
 110             result = transform(input);
 111         }
 112         return result;
 113     }
 114
 115     private DOMRpcResult transform(final RpcResult<?> input) {
 116         if (input.isSuccessful()) {
 117             final Object inputData = input.getResult();
 118             if (inputData instanceof DataContainer) {
 119                 return new DefaultDOMRpcResult(codec.toNormalizedNodeRpcData((DataContainer) inputData));
 120             } else {
 121                 return new DefaultDOMRpcResult((NormalizedNode<?, ?>) null);
 122             }
 123         }
 124         return new DefaultDOMRpcResult(input.getErrors());
 125     }
 126
 127 }