openflowplugin-impl/src/main/java/org/opendaylight/openflowplugin/impl/mastership/MastershipChangeServiceManagerImpl.java

   1 /*
   2  * Copyright (c) 2017 Pantheon Technologies s.r.o. 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.openflowplugin.impl.mastership;
   9
  10 import static org.opendaylight.infrautils.utils.concurrent.LoggingFutures.addErrorLogging;
  11
  12 import com.google.common.annotations.VisibleForTesting;
  13 import com.google.common.util.concurrent.ListenableFuture;
  14 import java.util.List;
  15 import java.util.concurrent.CopyOnWriteArrayList;
  16 import javax.inject.Singleton;
  17 import org.apache.aries.blueprint.annotation.service.Service;
  18 import org.eclipse.jdt.annotation.NonNull;
  19 import org.opendaylight.openflowplugin.api.openflow.device.DeviceInfo;
  20 import org.opendaylight.openflowplugin.api.openflow.lifecycle.MasterChecker;
  21 import org.opendaylight.openflowplugin.api.openflow.mastership.MastershipChangeException;
  22 import org.opendaylight.openflowplugin.api.openflow.mastership.MastershipChangeRegistration;
  23 import org.opendaylight.openflowplugin.api.openflow.mastership.MastershipChangeService;
  24 import org.opendaylight.openflowplugin.api.openflow.mastership.MastershipChangeServiceManager;
  25 import org.opendaylight.openflowplugin.api.openflow.mastership.ReconciliationFrameworkEvent;
  26 import org.opendaylight.openflowplugin.api.openflow.mastership.ReconciliationFrameworkRegistration;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.openflowplugin.rf.state.rev170713.ResultState;
  28 import org.slf4j.Logger;
  29 import org.slf4j.LoggerFactory;
  30
  31 @Singleton
  32 @Service(classes = MastershipChangeServiceManager.class)
  33 public final class MastershipChangeServiceManagerImpl implements MastershipChangeServiceManager {
  34
  35     private static final Logger LOG = LoggerFactory.getLogger(MastershipChangeServiceManagerImpl.class);
  36
  37     private final List<MastershipChangeService> serviceGroup = new CopyOnWriteArrayList<>();
  38     private ReconciliationFrameworkEvent rfService = null;
  39     private MasterChecker masterChecker;
  40
  41     @NonNull
  42     @Override
  43     public MastershipChangeRegistration register(@NonNull MastershipChangeService service) {
  44         final MastershipServiceDelegate registration =
  45                 new MastershipServiceDelegate(service, () -> serviceGroup.remove(service));
  46         serviceGroup.add(service);
  47         if (masterChecker != null && masterChecker.isAnyDeviceMastered()) {
  48             masterChecker.listOfMasteredDevices().forEach(service::onBecomeOwner);
  49         }
  50         return registration;
  51     }
  52
  53     @Override
  54     public ReconciliationFrameworkRegistration reconciliationFrameworkRegistration(
  55             @NonNull ReconciliationFrameworkEvent reconciliationFrameworkEvent) throws MastershipChangeException {
  56         if (rfService != null) {
  57             throw new MastershipChangeException("Reconciliation framework already registered.");
  58         } else {
  59             rfService = reconciliationFrameworkEvent;
  60             return new ReconciliationFrameworkServiceDelegate(reconciliationFrameworkEvent, () -> rfService = null);
  61         }
  62     }
  63
  64     @Override
  65     public void close() {
  66         serviceGroup.clear();
  67     }
  68
  69     @Override
  70     public void becomeMaster(@NonNull final DeviceInfo deviceInfo) {
  71         serviceGroup.forEach(mastershipChangeService -> mastershipChangeService.onBecomeOwner(deviceInfo));
  72     }
  73
  74     @Override
  75     public void becomeSlaveOrDisconnect(@NonNull final DeviceInfo deviceInfo) {
  76         if (rfService != null) {
  77             ListenableFuture<Void> future = rfService.onDeviceDisconnected(deviceInfo);
  78             // TODO This null future check here should ideally not be required, but some tests currently rely on it
  79             if (future != null) {
  80                 addErrorLogging(future, LOG, "onDeviceDisconnected() failed");
  81             }
  82         }
  83         serviceGroup.forEach(mastershipChangeService -> mastershipChangeService.onLoseOwnership(deviceInfo));
  84     }
  85
  86     @Override
  87     public ListenableFuture<ResultState> becomeMasterBeforeSubmittedDS(@NonNull DeviceInfo deviceInfo) {
  88         return rfService == null ? null : rfService.onDevicePrepared(deviceInfo);
  89     }
  90
  91     @Override
  92     public void setMasterChecker(@NonNull final MasterChecker masterChecker) {
  93         this.masterChecker = masterChecker;
  94     }
  95
  96     @Override
  97     public boolean isReconciliationFrameworkRegistered() {
  98         return rfService != null;
  99     }
 100
 101     @VisibleForTesting
 102     int serviceGroupListSize() {
 103         return serviceGroup.size();
 104     }
 105 }