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