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.ExecutionException;
  21 import java.util.concurrent.Executors;
  22 import java.util.concurrent.Future;
  23 import org.opendaylight.controller.md.sal.common.util.jmx.AbstractMXBean;
  24 import org.opendaylight.controller.sample.kitchen.api.EggsType;
  25 import org.opendaylight.controller.sample.kitchen.api.KitchenService;
  26 import org.opendaylight.controller.sample.kitchen.api.KitchenServiceRuntimeMXBean;
  27 import org.opendaylight.yang.gen.v1.http.netconfcentral.org.ns.toaster.rev091120.MakeToastInput;
  28 import org.opendaylight.yang.gen.v1.http.netconfcentral.org.ns.toaster.rev091120.MakeToastInputBuilder;
  29 import org.opendaylight.yang.gen.v1.http.netconfcentral.org.ns.toaster.rev091120.ToastType;
  30 import org.opendaylight.yang.gen.v1.http.netconfcentral.org.ns.toaster.rev091120.ToasterListener;
  31 import org.opendaylight.yang.gen.v1.http.netconfcentral.org.ns.toaster.rev091120.ToasterOutOfBread;
  32 import org.opendaylight.yang.gen.v1.http.netconfcentral.org.ns.toaster.rev091120.ToasterRestocked;
  33 import org.opendaylight.yang.gen.v1.http.netconfcentral.org.ns.toaster.rev091120.ToasterService;
  34 import org.opendaylight.yang.gen.v1.http.netconfcentral.org.ns.toaster.rev091120.WheatBread;
  35 import org.opendaylight.yangtools.yang.common.RpcError;
  36 import org.opendaylight.yangtools.yang.common.RpcError.ErrorType;
  37 import org.opendaylight.yangtools.yang.common.RpcResult;
  38 import org.opendaylight.yangtools.yang.common.RpcResultBuilder;
  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
  47     private final ToasterService toaster;
  48
  49     private final ListeningExecutorService executor = MoreExecutors.listeningDecorator(Executors.newCachedThreadPool());
  50
  51     private volatile boolean toasterOutOfBread;
  52
  53     public KitchenServiceImpl(ToasterService toaster) {
  54         super("KitchenService", "toaster-consumer", null);
  55         this.toaster = toaster;
  56     }
  57
  58     @Override
  59     public Future<RpcResult<Void>> makeBreakfast(EggsType eggsType, Class<? extends ToastType> toastType,
  60             int toastDoneness) {
  61         // Call makeToast and use JdkFutureAdapters to convert the Future to a ListenableFuture, The
  62         // OpendaylightToaster impl already returns a ListenableFuture so the conversion is actually a no-op.
  63
  64         ListenableFuture<RpcResult<Void>> makeToastFuture = JdkFutureAdapters
  65                 .listenInPoolThread(makeToast(toastType, toastDoneness), executor);
  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<Void>>> combinedFutures = Futures
  72                 .allAsList(ImmutableList.of(makeToastFuture, makeEggsFuture));
  73
  74         // Then transform the RpcResults into 1.
  75
  76         return Futures.transform(combinedFutures,
  77             (AsyncFunction<List<RpcResult<Void>>, RpcResult<Void>>) results -> {
  78                 boolean atLeastOneSucceeded = false;
  79                 Builder<RpcError> errorList = ImmutableList.builder();
  80                 for (RpcResult<Void> result : results) {
  81                     if (result.isSuccessful()) {
  82                         atLeastOneSucceeded = true;
  83                     }
  84
  85                     if (result.getErrors() != null) {
  86                         errorList.addAll(result.getErrors());
  87                     }
  88                 }
  89
  90                 return Futures.immediateFuture(RpcResultBuilder.<Void>status(atLeastOneSucceeded)
  91                         .withRpcErrors(errorList.build()).build());
  92             });
  93     }
  94
  95     private ListenableFuture<RpcResult<Void>> makeEggs(EggsType eggsType) {
  96         return executor.submit(() -> RpcResultBuilder.<Void>success().build());
  97     }
  98
  99     private Future<RpcResult<Void>> makeToast(Class<? extends ToastType> toastType, int toastDoneness) {
 100
 101         if (toasterOutOfBread) {
 102             LOG.info("We're out of toast but we can make eggs");
 103             return Futures.immediateFuture(RpcResultBuilder.<Void>success().withWarning(ErrorType.APPLICATION,
 104                     "partial-operation", "Toaster is out of bread but we can make you eggs").build());
 105         }
 106
 107         // Access the ToasterService to make the toast.
 108
 109         MakeToastInput toastInput = new MakeToastInputBuilder().setToasterDoneness((long) toastDoneness)
 110                 .setToasterToastType(toastType).build();
 111
 112         return toaster.makeToast(toastInput);
 113     }
 114
 115     @Override
 116     public Boolean makeScrambledWithWheat() {
 117         try {
 118             // This call has to block since we must return a result to the JMX client.
 119             RpcResult<Void> result = makeBreakfast(EggsType.SCRAMBLED, WheatBread.class, 2).get();
 120             if (result.isSuccessful()) {
 121                 LOG.info("makeBreakfast succeeded");
 122             } else {
 123                 LOG.warn("makeBreakfast failed: " + result.getErrors());
 124             }
 125
 126             return result.isSuccessful();
 127
 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(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(ToasterRestocked notification) {
 149         LOG.info("ToasterRestocked notification - amountOfBread: " + notification.getAmountOfBread());
 150         toasterOutOfBread = false;
 151     }
 152 }