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 package org.opendaylight.controller.sample.kitchen.impl;
   9
  10 import com.google.common.collect.ImmutableList;
  11 import com.google.common.collect.ImmutableList.Builder;
  12 import com.google.common.util.concurrent.Futures;
  13 import com.google.common.util.concurrent.ListenableFuture;
  14 import com.google.common.util.concurrent.ListeningExecutorService;
  15 import com.google.common.util.concurrent.MoreExecutors;
  16 import java.util.List;
  17 import java.util.concurrent.ExecutionException;
  18 import java.util.concurrent.Executors;
  19 import java.util.concurrent.Future;
  20 import org.opendaylight.controller.md.sal.common.util.jmx.AbstractMXBean;
  21 import org.opendaylight.controller.sample.kitchen.api.EggsType;
  22 import org.opendaylight.controller.sample.kitchen.api.KitchenService;
  23 import org.opendaylight.controller.sample.kitchen.api.KitchenServiceRuntimeMXBean;
  24 import org.opendaylight.yang.gen.v1.http.netconfcentral.org.ns.toaster.rev091120.MakeToastInput;
  25 import org.opendaylight.yang.gen.v1.http.netconfcentral.org.ns.toaster.rev091120.MakeToastInputBuilder;
  26 import org.opendaylight.yang.gen.v1.http.netconfcentral.org.ns.toaster.rev091120.MakeToastOutput;
  27 import org.opendaylight.yang.gen.v1.http.netconfcentral.org.ns.toaster.rev091120.MakeToastOutputBuilder;
  28 import org.opendaylight.yang.gen.v1.http.netconfcentral.org.ns.toaster.rev091120.ToastType;
  29 import org.opendaylight.yang.gen.v1.http.netconfcentral.org.ns.toaster.rev091120.ToasterListener;
  30 import org.opendaylight.yang.gen.v1.http.netconfcentral.org.ns.toaster.rev091120.ToasterOutOfBread;
  31 import org.opendaylight.yang.gen.v1.http.netconfcentral.org.ns.toaster.rev091120.ToasterRestocked;
  32 import org.opendaylight.yang.gen.v1.http.netconfcentral.org.ns.toaster.rev091120.ToasterService;
  33 import org.opendaylight.yang.gen.v1.http.netconfcentral.org.ns.toaster.rev091120.WheatBread;
  34 import org.opendaylight.yangtools.yang.common.RpcError;
  35 import org.opendaylight.yangtools.yang.common.RpcError.ErrorType;
  36 import org.opendaylight.yangtools.yang.common.RpcResult;
  37 import org.opendaylight.yangtools.yang.common.RpcResultBuilder;
  38 import org.opendaylight.yangtools.yang.common.Uint32;
  39 import org.slf4j.Logger;
  40 import org.slf4j.LoggerFactory;
  41
  42 public class KitchenServiceImpl extends AbstractMXBean
  43         implements KitchenService, KitchenServiceRuntimeMXBean, ToasterListener {
  44
  45     private static final Logger LOG = LoggerFactory.getLogger(KitchenServiceImpl.class);
  46     private static final MakeToastOutput EMPTY_MAKE_OUTPUT = new MakeToastOutputBuilder().build();
  47
  48     private final ToasterService toaster;
  49
  50     private final ListeningExecutorService executor = MoreExecutors.listeningDecorator(Executors.newCachedThreadPool());
  51
  52     private volatile boolean toasterOutOfBread;
  53
  54     public KitchenServiceImpl(final ToasterService toaster) {
  55         super("KitchenService", "toaster-consumer", null);
  56         this.toaster = toaster;
  57     }
  58
  59     @Override
  60     public Future<RpcResult<Void>> makeBreakfast(final EggsType eggsType, final Class<? extends ToastType> toastType,
  61             final int toastDoneness) {
  62         // Call makeToast, The OpendaylightToaster impl already returns a ListenableFuture so the conversion is
  63         // actually a no-op.
  64
  65         ListenableFuture<RpcResult<MakeToastOutput>> makeToastFuture = makeToast(toastType, toastDoneness);
  66
  67         ListenableFuture<RpcResult<Void>> makeEggsFuture = makeEggs(eggsType);
  68
  69         // Combine the 2 ListenableFutures into 1 containing a list RpcResults.
  70
  71         ListenableFuture<List<RpcResult<? extends Object>>> combinedFutures = Futures
  72                 .allAsList(ImmutableList.of(makeToastFuture, makeEggsFuture));
  73
  74         // Then transform the RpcResults into 1.
  75
  76         return Futures.transformAsync(combinedFutures, results -> {
  77             boolean atLeastOneSucceeded = false;
  78             Builder<RpcError> errorList = ImmutableList.builder();
  79             for (RpcResult<? extends Object> result : results) {
  80                 if (result.isSuccessful()) {
  81                     atLeastOneSucceeded = true;
  82                 }
  83
  84                 if (result.getErrors() != null) {
  85                     errorList.addAll(result.getErrors());
  86                 }
  87             }
  88
  89             return Futures.immediateFuture(RpcResultBuilder.<Void>status(atLeastOneSucceeded)
  90                     .withRpcErrors(errorList.build()).build());
  91         }, MoreExecutors.directExecutor());
  92     }
  93
  94     private ListenableFuture<RpcResult<Void>> makeEggs(final EggsType eggsType) {
  95         return executor.submit(() -> RpcResultBuilder.<Void>success().build());
  96     }
  97
  98     private ListenableFuture<RpcResult<MakeToastOutput>> makeToast(final Class<? extends ToastType> toastType,
  99             final int toastDoneness) {
 100
 101         if (toasterOutOfBread) {
 102             LOG.info("We're out of toast but we can make eggs");
 103             return Futures.immediateFuture(RpcResultBuilder.success(EMPTY_MAKE_OUTPUT)
 104                 .withWarning(ErrorType.APPLICATION, "partial-operation",
 105                     "Toaster is out of bread but we can make you eggs").build());
 106         }
 107
 108         // Access the ToasterService to make the toast.
 109
 110         MakeToastInput toastInput = new MakeToastInputBuilder().setToasterDoneness(Uint32.valueOf(toastDoneness))
 111                 .setToasterToastType(toastType).build();
 112
 113         return toaster.makeToast(toastInput);
 114     }
 115
 116     @Override
 117     public Boolean makeScrambledWithWheat() {
 118         try {
 119             // This call has to block since we must return a result to the JMX client.
 120             RpcResult<Void> result = makeBreakfast(EggsType.SCRAMBLED, WheatBread.class, 2).get();
 121             if (result.isSuccessful()) {
 122                 LOG.info("makeBreakfast succeeded");
 123             } else {
 124                 LOG.warn("makeBreakfast failed: {}", result.getErrors());
 125             }
 126
 127             return result.isSuccessful();
 128         } catch (InterruptedException | ExecutionException e) {
 129             LOG.warn("An error occurred while maing breakfast", e);
 130         }
 131
 132         return Boolean.FALSE;
 133     }
 134
 135     /**
 136      * Implemented from the ToasterListener interface.
 137      */
 138     @Override
 139     public void onToasterOutOfBread(final ToasterOutOfBread notification) {
 140         LOG.info("ToasterOutOfBread notification");
 141         toasterOutOfBread = true;
 142     }
 143
 144     /**
 145      * Implemented from the ToasterListener interface.
 146      */
 147     @Override
 148     public void onToasterRestocked(final ToasterRestocked notification) {
 149         LOG.info("ToasterRestocked notification - amountOfBread: {}", notification.getAmountOfBread());
 150         toasterOutOfBread = false;
 151     }
 152 }