opendaylight/md-sal/sal-dom-broker/src/main/java/org/opendaylight/controller/md/sal/dom/broker/impl/mount/DOMMountPointServiceImpl.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
   9 package org.opendaylight.controller.md.sal.dom.broker.impl.mount;
  10
  11 import com.google.common.base.Optional;
  12 import com.google.common.base.Preconditions;
  13 import com.google.common.collect.ClassToInstanceMap;
  14 import com.google.common.collect.MutableClassToInstanceMap;
  15 import java.util.HashMap;
  16 import java.util.Map;
  17 import org.opendaylight.controller.md.sal.dom.api.DOMMountPoint;
  18 import org.opendaylight.controller.md.sal.dom.api.DOMMountPointService;
  19 import org.opendaylight.controller.md.sal.dom.api.DOMService;
  20 import org.opendaylight.controller.md.sal.dom.broker.spi.mount.SimpleDOMMountPoint;
  21 import org.opendaylight.controller.sal.core.api.mount.MountProvisionListener;
  22 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  23 import org.opendaylight.yangtools.concepts.ObjectRegistration;
  24 import org.opendaylight.yangtools.util.ListenerRegistry;
  25 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  26 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  27
  28 public class DOMMountPointServiceImpl implements DOMMountPointService {
  29
  30     private final Map<YangInstanceIdentifier, DOMMountPoint> mountPoints = new HashMap<>();
  31
  32     private final ListenerRegistry<MountProvisionListener> listeners = ListenerRegistry.create();
  33
  34     @Override
  35     public Optional<DOMMountPoint> getMountPoint(final YangInstanceIdentifier path) {
  36         return Optional.fromNullable(mountPoints.get(path));
  37     }
  38
  39     @Override
  40     public DOMMountPointBuilder createMountPoint(final YangInstanceIdentifier path) {
  41         Preconditions.checkState(!mountPoints.containsKey(path), "Mount point already exists");
  42         return new DOMMountPointBuilderImpl(path);
  43     }
  44
  45     public void notifyMountCreated(final YangInstanceIdentifier identifier) {
  46         for (final ListenerRegistration<MountProvisionListener> listener : listeners
  47                 .getListeners()) {
  48             listener.getInstance().onMountPointCreated(identifier);
  49         }
  50     }
  51
  52     public void notifyMountRemoved(final YangInstanceIdentifier identifier) {
  53         for (final ListenerRegistration<MountProvisionListener> listener : listeners
  54                 .getListeners()) {
  55             listener.getInstance().onMountPointRemoved(identifier);
  56         }
  57     }
  58
  59     @Override
  60     public ListenerRegistration<MountProvisionListener> registerProvisionListener(
  61             final MountProvisionListener listener) {
  62         return listeners.register(listener);
  63     }
  64
  65     public ObjectRegistration<DOMMountPoint> registerMountPoint(final DOMMountPoint mountPoint) {
  66         synchronized (mountPoints) {
  67             Preconditions
  68                     .checkState(!mountPoints.containsKey(mountPoint.getIdentifier()), "Mount point already exists");
  69             mountPoints.put(mountPoint.getIdentifier(), mountPoint);
  70         }
  71         notifyMountCreated(mountPoint.getIdentifier());
  72
  73         return new MountRegistration(mountPoint);
  74     }
  75
  76     public void unregisterMountPoint(final YangInstanceIdentifier mountPointId) {
  77         synchronized (mountPoints) {
  78             Preconditions.checkState(mountPoints.containsKey(mountPointId), "Mount point does not exist");
  79             mountPoints.remove(mountPointId);
  80         }
  81         notifyMountRemoved(mountPointId);
  82     }
  83
  84     public class DOMMountPointBuilderImpl implements DOMMountPointBuilder {
  85
  86         ClassToInstanceMap<DOMService> services = MutableClassToInstanceMap.create();
  87         private SimpleDOMMountPoint mountPoint;
  88         private final YangInstanceIdentifier path;
  89         private SchemaContext schemaContext;
  90
  91         public DOMMountPointBuilderImpl(final YangInstanceIdentifier path) {
  92             this.path = path;
  93         }
  94
  95         @Override
  96         public <T extends DOMService> DOMMountPointBuilder addService(final Class<T> type, final T impl) {
  97             services.putInstance(type, impl);
  98             return this;
  99         }
 100
 101         @Override
 102         public DOMMountPointBuilder addInitialSchemaContext(final SchemaContext ctx) {
 103             schemaContext = ctx;
 104             return this;
 105         }
 106
 107         @Override
 108         public ObjectRegistration<DOMMountPoint> register() {
 109             Preconditions.checkState(mountPoint == null, "Mount point is already built.");
 110             mountPoint = SimpleDOMMountPoint.create(path, services,schemaContext);
 111             return registerMountPoint(mountPoint);
 112         }
 113     }
 114
 115     private final class MountRegistration implements ObjectRegistration<DOMMountPoint> {
 116         private final DOMMountPoint mountPoint;
 117
 118         MountRegistration(final DOMMountPoint mountPoint) {
 119             this.mountPoint = mountPoint;
 120         }
 121
 122         @Override
 123         public DOMMountPoint getInstance() {
 124             return mountPoint;
 125         }
 126
 127         @Override
 128         public void close() throws Exception {
 129             unregisterMountPoint(mountPoint.getIdentifier());
 130         }
 131     }
 132 }