opendaylight/md-sal/samples/toaster-consumer/src/main/java/org/opendaylight/controller/sample/kitchen/impl/KitchenServiceImpl.java

   1 /*
   2  * Copyright (c) 2014, 2015 Brocade Communications 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
   9 package org.opendaylight.controller.sample.kitchen.impl;
  10
  11 import com.google.common.collect.ImmutableList;
  12 import com.google.common.collect.ImmutableList.Builder;
  13 import com.google.common.util.concurrent.AsyncFunction;
  14 import com.google.common.util.concurrent.Futures;
  15 import com.google.common.util.concurrent.JdkFutureAdapters;
  16 import com.google.common.util.concurrent.ListenableFuture;
  17 import com.google.common.util.concurrent.ListeningExecutorService;
  18 import com.google.common.util.concurrent.MoreExecutors;
  19 import java.util.List;
  20 import java.util.concurrent.Callable;
  21 import java.util.concurrent.ExecutionException;
  22 import java.util.concurrent.Executors;
  23 import java.util.concurrent.Future;
  24 import org.opendaylight.controller.config.yang.config.kitchen_service.impl.KitchenServiceRuntimeMXBean;
  25 import org.opendaylight.controller.md.sal.common.util.jmx.AbstractMXBean;
  26 import org.opendaylight.controller.sample.kitchen.api.EggsType;
  27 import org.opendaylight.controller.sample.kitchen.api.KitchenService;
  28 import org.opendaylight.yang.gen.v1.http.netconfcentral.org.ns.toaster.rev091120.MakeToastInput;
  29 import org.opendaylight.yang.gen.v1.http.netconfcentral.org.ns.toaster.rev091120.MakeToastInputBuilder;
  30 import org.opendaylight.yang.gen.v1.http.netconfcentral.org.ns.toaster.rev091120.ToastType;
  31 import org.opendaylight.yang.gen.v1.http.netconfcentral.org.ns.toaster.rev091120.ToasterListener;
  32 import org.opendaylight.yang.gen.v1.http.netconfcentral.org.ns.toaster.rev091120.ToasterOutOfBread;
  33 import org.opendaylight.yang.gen.v1.http.netconfcentral.org.ns.toaster.rev091120.ToasterRestocked;
  34 import org.opendaylight.yang.gen.v1.http.netconfcentral.org.ns.toaster.rev091120.ToasterService;
  35 import org.opendaylight.yang.gen.v1.http.netconfcentral.org.ns.toaster.rev091120.WheatBread;
  36 import org.opendaylight.yangtools.yang.common.RpcError;
  37 import org.opendaylight.yangtools.yang.common.RpcError.ErrorType;
  38 import org.opendaylight.yangtools.yang.common.RpcResult;
  39 import org.opendaylight.yangtools.yang.common.RpcResultBuilder;
  40 import org.slf4j.Logger;
  41 import org.slf4j.LoggerFactory;
  42
  43 public class KitchenServiceImpl extends AbstractMXBean
  44         implements KitchenService, KitchenServiceRuntimeMXBean, ToasterListener {
  45
  46     private static final Logger log = LoggerFactory.getLogger( KitchenServiceImpl.class );
  47
  48     private final ToasterService toaster;
  49
  50     private final ListeningExecutorService executor =
  51                                    MoreExecutors.listeningDecorator( Executors.newCachedThreadPool() );
  52
  53     private volatile boolean toasterOutOfBread;
  54
  55     public KitchenServiceImpl(ToasterService toaster) {
  56         super("KitchenService", "toaster-consumer", null);
  57         this.toaster = toaster;
  58     }
  59
  60     @Override
  61     public Future<RpcResult<Void>> makeBreakfast( EggsType eggsType, Class<? extends ToastType> toastType,
  62                                                   int toastDoneness ) {
  63
  64         // Call makeToast and use JdkFutureAdapters to convert the Future to a ListenableFuture,
  65         // The OpendaylightToaster impl already returns a ListenableFuture so the conversion is
  66         // actually a no-op.
  67
  68         ListenableFuture<RpcResult<Void>> makeToastFuture = JdkFutureAdapters.listenInPoolThread(
  69                 makeToast( toastType, toastDoneness ), executor );
  70
  71         ListenableFuture<RpcResult<Void>> makeEggsFuture = makeEggs( eggsType );
  72
  73         // Combine the 2 ListenableFutures into 1 containing a list of RpcResults.
  74
  75         ListenableFuture<List<RpcResult<Void>>> combinedFutures =
  76                 Futures.allAsList( ImmutableList.of( makeToastFuture, makeEggsFuture ) );
  77
  78         // Then transform the RpcResults into 1.
  79
  80         return Futures.transform( combinedFutures,
  81             new AsyncFunction<List<RpcResult<Void>>,RpcResult<Void>>() {
  82                 @Override
  83                 public ListenableFuture<RpcResult<Void>> apply( List<RpcResult<Void>> results )
  84                                                                                  throws Exception {
  85                     boolean atLeastOneSucceeded = false;
  86                     Builder<RpcError> errorList = ImmutableList.builder();
  87                     for( RpcResult<Void> result: results ) {
  88                         if( result.isSuccessful() ) {
  89                             atLeastOneSucceeded = true;
  90                         }
  91
  92                         if( result.getErrors() != null ) {
  93                             errorList.addAll( result.getErrors() );
  94                         }
  95                     }
  96
  97                     return Futures.immediateFuture(
  98                               RpcResultBuilder.<Void> status( atLeastOneSucceeded )
  99                                               .withRpcErrors( errorList.build() ).build() );
 100                 }
 101         } );
 102     }
 103
 104     private ListenableFuture<RpcResult<Void>> makeEggs( EggsType eggsType ) {
 105
 106         return executor.submit( new Callable<RpcResult<Void>>() {
 107
 108             @Override
 109             public RpcResult<Void> call() throws Exception {
 110
 111                 // We don't actually do anything here - just return a successful result.
 112                 return RpcResultBuilder.<Void> success().build();
 113             }
 114         } );
 115     }
 116
 117     private Future<RpcResult<Void>> makeToast( Class<? extends ToastType> toastType,
 118                                                int toastDoneness ) {
 119
 120         if( toasterOutOfBread )
 121         {
 122             log.info( "We're out of toast but we can make eggs" );
 123             return Futures.immediateFuture( RpcResultBuilder.<Void> success()
 124                      .withWarning( ErrorType.APPLICATION, "partial-operation",
 125                                       "Toaster is out of bread but we can make you eggs" ).build() );
 126         }
 127
 128         // Access the ToasterService to make the toast.
 129
 130         MakeToastInput toastInput = new MakeToastInputBuilder()
 131             .setToasterDoneness( (long) toastDoneness )
 132             .setToasterToastType( toastType )
 133             .build();
 134
 135         return toaster.makeToast( toastInput );
 136     }
 137
 138     @Override
 139     public Boolean makeScrambledWithWheat() {
 140         try {
 141             // This call has to block since we must return a result to the JMX client.
 142             RpcResult<Void> result = makeBreakfast( EggsType.SCRAMBLED, WheatBread.class, 2 ).get();
 143             if( result.isSuccessful() ) {
 144                 log.info( "makeBreakfast succeeded" );
 145             } else {
 146                 log.warn( "makeBreakfast failed: " + result.getErrors() );
 147             }
 148
 149             return result.isSuccessful();
 150
 151         } catch( InterruptedException | ExecutionException e ) {
 152             log.warn( "An error occurred while maing breakfast: " + e );
 153         }
 154
 155         return Boolean.FALSE;
 156     }
 157
 158     /**
 159      * Implemented from the ToasterListener interface.
 160      */
 161     @Override
 162     public void onToasterOutOfBread( ToasterOutOfBread notification ) {
 163         log.info( "ToasterOutOfBread notification" );
 164         toasterOutOfBread = true;
 165     }
 166
 167     /**
 168      * Implemented from the ToasterListener interface.
 169      */
 170     @Override
 171     public void onToasterRestocked( ToasterRestocked notification ) {
 172         log.info( "ToasterRestocked notification - amountOfBread: " + notification.getAmountOfBread() );
 173         toasterOutOfBread = false;
 174     }
 175 }