opendaylight/md-sal/sal-binding-broker/src/main/java/org/opendaylight/controller/sal/binding/impl/MountPointManagerImpl.java

   1 /*
   2  * Copyright (c) 2014 Cisco 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.sal.binding.impl;
   9
  10 import java.util.concurrent.ConcurrentHashMap;
  11 import java.util.concurrent.ConcurrentMap;
  12 import java.util.concurrent.Executors;
  13
  14 import org.opendaylight.controller.md.sal.binding.util.AbstractBindingSalProviderInstance;
  15 import org.opendaylight.controller.sal.binding.api.mount.MountProviderInstance;
  16 import org.opendaylight.controller.sal.binding.api.mount.MountProviderService;
  17 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  18 import org.opendaylight.yangtools.concepts.util.ListenerRegistry;
  19 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  20 import org.slf4j.Logger;
  21 import org.slf4j.LoggerFactory;
  22
  23 import com.google.common.util.concurrent.ListeningExecutorService;
  24 import com.google.common.util.concurrent.MoreExecutors;
  25
  26 public class MountPointManagerImpl implements MountProviderService {
  27
  28     public final Logger LOG = LoggerFactory.getLogger(MountPointManagerImpl.class);
  29
  30     private final ConcurrentMap<InstanceIdentifier<?>, BindingMountPointImpl> mountPoints;
  31     private final ListenerRegistry<MountProvisionListener> listeners = ListenerRegistry.create();
  32
  33     private ListeningExecutorService notificationExecutor;
  34     private ListeningExecutorService dataCommitExecutor;
  35
  36     public MountPointManagerImpl() {
  37         mountPoints = new ConcurrentHashMap<>();
  38     }
  39
  40     public ListeningExecutorService getNotificationExecutor() {
  41         return notificationExecutor;
  42     }
  43
  44     public void setNotificationExecutor(final ListeningExecutorService notificationExecutor) {
  45         this.notificationExecutor = notificationExecutor;
  46     }
  47
  48     public ListeningExecutorService getDataCommitExecutor() {
  49         return dataCommitExecutor;
  50     }
  51
  52     public void setDataCommitExecutor(final ListeningExecutorService dataCommitExecutor) {
  53         this.dataCommitExecutor = dataCommitExecutor;
  54     }
  55
  56     @Override
  57     public synchronized BindingMountPointImpl createMountPoint(final InstanceIdentifier<?> path) {
  58         BindingMountPointImpl potential = mountPoints.get(path);
  59         if (potential != null) {
  60             throw new IllegalStateException("Mount point already exists.");
  61         }
  62         return createOrGetMountPointImpl(path);
  63     }
  64
  65     @Override
  66     public BindingMountPointImpl createOrGetMountPoint(final InstanceIdentifier<?> path) {
  67         BindingMountPointImpl potential = getMountPoint(path);
  68         if (potential != null) {
  69             return potential;
  70         }
  71         return createOrGetMountPointImpl(path);
  72     }
  73
  74     @Override
  75     public BindingMountPointImpl getMountPoint(final InstanceIdentifier<?> path) {
  76         return mountPoints.get(path);
  77     }
  78
  79     private synchronized BindingMountPointImpl createOrGetMountPointImpl(final InstanceIdentifier<?> path) {
  80         BindingMountPointImpl potential = getMountPoint(path);
  81         if (potential != null) {
  82             return potential;
  83         }
  84         RpcProviderRegistryImpl rpcRegistry = new RpcProviderRegistryImpl("mount");
  85         NotificationBrokerImpl notificationBroker = new NotificationBrokerImpl(getNotificationExecutor());
  86         DataBrokerImpl dataBroker = new DataBrokerImpl();
  87         dataBroker.setExecutor(MoreExecutors.listeningDecorator(Executors.newSingleThreadExecutor()));
  88         BindingMountPointImpl mountInstance = new BindingMountPointImpl(path, rpcRegistry, notificationBroker,
  89                 dataBroker);
  90         mountPoints.putIfAbsent(path, mountInstance);
  91         notifyMountPointCreated(path);
  92         return mountInstance;
  93     }
  94
  95     private void notifyMountPointCreated(final InstanceIdentifier<?> path) {
  96         for (ListenerRegistration<MountProvisionListener> listener : listeners) {
  97             try {
  98                 listener.getInstance().onMountPointCreated(path);
  99             } catch (Exception e) {
 100                 LOG.error("Unhandled exception during invoking listener.", e);
 101             }
 102         }
 103     }
 104
 105     @Override
 106     public ListenerRegistration<MountProvisionListener> registerProvisionListener(final MountProvisionListener listener) {
 107         return listeners.register(listener);
 108     }
 109
 110     public class BindingMountPointImpl extends
 111     AbstractBindingSalProviderInstance<DataBrokerImpl, NotificationBrokerImpl, RpcProviderRegistryImpl>
 112     implements MountProviderInstance {
 113
 114         private final InstanceIdentifier<?> identifier;
 115
 116         public BindingMountPointImpl(final org.opendaylight.yangtools.yang.binding.InstanceIdentifier<?> identifier,
 117                 final RpcProviderRegistryImpl rpcRegistry, final NotificationBrokerImpl notificationBroker,
 118                 final DataBrokerImpl dataBroker) {
 119             super(rpcRegistry, notificationBroker, dataBroker);
 120             this.identifier = identifier;
 121         }
 122
 123         // Needed only for BI Connector
 124         public DataBrokerImpl getDataBrokerImpl() {
 125             return getDataBroker();
 126         }
 127
 128         @Override
 129         public InstanceIdentifier<?> getIdentifier() {
 130             return this.identifier;
 131         }
 132     }
 133 }