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.slf4j.Logger;
  39 import org.slf4j.LoggerFactory;
  40
  41 public class KitchenServiceImpl extends AbstractMXBean
  42         implements KitchenService, KitchenServiceRuntimeMXBean, ToasterListener {
  43
  44     private static final Logger LOG = LoggerFactory.getLogger(KitchenServiceImpl.class);
  45     private static final MakeToastOutput EMPTY_MAKE_OUTPUT = new MakeToastOutputBuilder().build();
  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(final ToasterService toaster) {
  54         super("KitchenService", "toaster-consumer", null);
  55         this.toaster = toaster;
  56     }
  57
  58     @Override
  59     public Future<RpcResult<Void>> makeBreakfast(final EggsType eggsType, final Class<? extends ToastType> toastType,
  60             final int toastDoneness) {
  61         // Call makeToast, The OpendaylightToaster impl already returns a ListenableFuture so the conversion is
  62         // actually a no-op.
  63
  64         ListenableFuture<RpcResult<MakeToastOutput>> makeToastFuture = makeToast(toastType, toastDoneness);
  65
  66         ListenableFuture<RpcResult<Void>> makeEggsFuture = makeEggs(eggsType);
  67
  68         // Combine the 2 ListenableFutures into 1 containing a list RpcResults.
  69
  70         ListenableFuture<List<RpcResult<? extends Object>>> combinedFutures = Futures
  71                 .allAsList(ImmutableList.of(makeToastFuture, makeEggsFuture));
  72
  73         // Then transform the RpcResults into 1.
  74
  75         return Futures.transformAsync(combinedFutures, results -> {
  76             boolean atLeastOneSucceeded = false;
  77             Builder<RpcError> errorList = ImmutableList.builder();
  78             for (RpcResult<? extends Object> result : results) {
  79                 if (result.isSuccessful()) {
  80                     atLeastOneSucceeded = true;
  81                 }
  82
  83                 if (result.getErrors() != null) {
  84                     errorList.addAll(result.getErrors());
  85                 }
  86             }
  87
  88             return Futures.immediateFuture(RpcResultBuilder.<Void>status(atLeastOneSucceeded)
  89                     .withRpcErrors(errorList.build()).build());
  90         }, MoreExecutors.directExecutor());
  91     }
  92
  93     private ListenableFuture<RpcResult<Void>> makeEggs(final EggsType eggsType) {
  94         return executor.submit(() -> RpcResultBuilder.<Void>success().build());
  95     }
  96
  97     private ListenableFuture<RpcResult<MakeToastOutput>> makeToast(final Class<? extends ToastType> toastType,
  98             final int toastDoneness) {
  99
 100         if (toasterOutOfBread) {
 101             LOG.info("We're out of toast but we can make eggs");
 102             return Futures.immediateFuture(RpcResultBuilder.success(EMPTY_MAKE_OUTPUT)
 103                 .withWarning(ErrorType.APPLICATION, "partial-operation",
 104                     "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         } catch (InterruptedException | ExecutionException e) {
 128             LOG.warn("An error occurred while maing breakfast", e);
 129         }
 130
 131         return Boolean.FALSE;
 132     }
 133
 134     /**
 135      * Implemented from the ToasterListener interface.
 136      */
 137     @Override
 138     public void onToasterOutOfBread(final ToasterOutOfBread notification) {
 139         LOG.info("ToasterOutOfBread notification");
 140         toasterOutOfBread = true;
 141     }
 142
 143     /**
 144      * Implemented from the ToasterListener interface.
 145      */
 146     @Override
 147     public void onToasterRestocked(final ToasterRestocked notification) {
 148         LOG.info("ToasterRestocked notification - amountOfBread: {}", notification.getAmountOfBread());
 149         toasterOutOfBread = false;
 150     }
 151 }