opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/OSGiDistributedDataStore.java

   1 /*
   2  * Copyright (c) 2020 PANTHEON.tech, 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.controller.cluster.datastore;
   9
  10 import static java.util.Objects.requireNonNull;
  11
  12 import com.google.common.annotations.Beta;
  13 import com.google.common.util.concurrent.FutureCallback;
  14 import com.google.common.util.concurrent.Futures;
  15 import java.util.Map;
  16 import org.checkerframework.checker.lock.qual.GuardedBy;
  17 import org.opendaylight.controller.cluster.ActorSystemProvider;
  18 import org.opendaylight.controller.cluster.datastore.config.Configuration;
  19 import org.opendaylight.controller.cluster.datastore.config.ConfigurationImpl;
  20 import org.opendaylight.controller.cluster.datastore.config.ModuleShardConfigProvider;
  21 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  22 import org.opendaylight.mdsal.dom.api.DOMSchemaService;
  23 import org.osgi.framework.FrameworkUtil;
  24 import org.osgi.service.component.ComponentFactory;
  25 import org.osgi.service.component.ComponentInstance;
  26 import org.osgi.service.component.annotations.Activate;
  27 import org.osgi.service.component.annotations.Component;
  28 import org.osgi.service.component.annotations.Deactivate;
  29 import org.osgi.service.component.annotations.Modified;
  30 import org.osgi.service.component.annotations.Reference;
  31 import org.slf4j.Logger;
  32 import org.slf4j.LoggerFactory;
  33
  34 /**
  35  * Global bootstrap component. It is responsible to start all distributed datastore instances and activate
  36  * {@link OSGiDOMStore} as appropriate. It also provides routing of datastore proprerties towards AbstractDataStore.
  37  */
  38 @Beta
  39 @Component(immediate = true, configurationPid = "org.opendaylight.controller.cluster.datastore")
  40 public final class OSGiDistributedDataStore {
  41     /**
  42      * Internal state associated with a particular datastore. An instance is created for each datastore and once the
  43      * datastore settles, we create a new component configuration of {@link OSGiDOMStore}. This indirection is needed
  44      * to not block Service Component Runtime from activating other components while we are waiting for the datastore
  45      * to settle (which can take a long time).
  46      */
  47     private final class DatastoreState implements FutureCallback<Object> {
  48         private final DatastoreContextIntrospector introspector;
  49         private final LogicalDatastoreType datastoreType;
  50         private final AbstractDataStore datastore;
  51         private final String serviceType;
  52
  53         @GuardedBy("this")
  54         private ComponentInstance<OSGiDOMStore> component;
  55         @GuardedBy("this")
  56         private boolean stopped;
  57
  58         DatastoreState(final DatastoreContextIntrospector introspector, final LogicalDatastoreType datastoreType,
  59                 final AbstractDataStore datastore, final String serviceType) {
  60             this.introspector = requireNonNull(introspector);
  61             this.datastoreType = requireNonNull(datastoreType);
  62             this.datastore = requireNonNull(datastore);
  63             this.serviceType = requireNonNull(serviceType);
  64         }
  65
  66         synchronized void updateProperties(final Map<String, Object> properties) {
  67             if (introspector.update(properties)) {
  68                 LOG.info("Distributed Datastore type {} updating context", datastoreType);
  69                 datastore.onDatastoreContextUpdated(introspector.newContextFactory());
  70             }
  71         }
  72
  73         void stop() {
  74             LOG.info("Distributed Datastore type {} stopping", datastoreType);
  75
  76             synchronized (this) {
  77                 stopped = true;
  78                 if (component != null) {
  79                     component.dispose();
  80                     component = null;
  81                 }
  82                 datastore.close();
  83                 LOG.info("Distributed Datastore type {} stopped", datastoreType);
  84             }
  85         }
  86
  87         @Override
  88         public void onSuccess(final Object result) {
  89             LOG.debug("Distributed Datastore type {} reached initial settle", datastoreType);
  90
  91             synchronized (this) {
  92                 if (!stopped) {
  93                     component = datastoreFactory.newInstance(FrameworkUtil.asDictionary(Map.of(
  94                         OSGiDOMStore.DATASTORE_TYPE_PROP, datastoreType,
  95                         OSGiDOMStore.DATASTORE_INST_PROP, datastore,
  96                         "type", serviceType)));
  97                     LOG.info("Distributed Datastore type {} started", datastoreType);
  98                 }
  99             }
 100         }
 101
 102         @Override
 103         public synchronized void onFailure(final Throwable cause) {
 104             LOG.error("Distributed Datastore type {} failed to settle", datastoreType, cause);
 105         }
 106     }
 107
 108     private static final Logger LOG = LoggerFactory.getLogger(OSGiDistributedDataStore.class);
 109
 110     @Reference
 111     DOMSchemaService schemaService = null;
 112     @Reference
 113     ActorSystemProvider actorSystemProvider = null;
 114     @Reference
 115     DatastoreContextIntrospectorFactory introspectorFactory = null;
 116     @Reference
 117     DatastoreSnapshotRestore snapshotRestore = null;
 118     @Reference
 119     ModuleShardConfigProvider configProvider = null;
 120     @Reference(target = "(component.factory=" + OSGiDOMStore.FACTORY_NAME + ")")
 121     ComponentFactory<OSGiDOMStore> datastoreFactory = null;
 122
 123     private DatastoreState configDatastore;
 124     private DatastoreState operDatastore;
 125
 126     @Activate
 127     void activate(final Map<String, Object> properties) {
 128         configDatastore = createDatastore(LogicalDatastoreType.CONFIGURATION, "distributed-config", properties, null);
 129         operDatastore = createDatastore(LogicalDatastoreType.OPERATIONAL, "distributed-operational", properties,
 130             new ConfigurationImpl(configProvider));
 131     }
 132
 133     @Modified
 134     void modified(final Map<String, Object> properties) {
 135         LOG.debug("Overlaying settings: {}", properties);
 136         configDatastore.updateProperties(properties);
 137         operDatastore.updateProperties(properties);
 138     }
 139
 140     @Deactivate
 141     void deactivate() {
 142         operDatastore.stop();
 143         operDatastore = null;
 144         configDatastore.stop();
 145         configDatastore = null;
 146     }
 147
 148     private DatastoreState createDatastore(final LogicalDatastoreType datastoreType, final String serviceType,
 149             final Map<String, Object> properties, final Configuration config) {
 150         LOG.info("Distributed Datastore type {} starting", datastoreType);
 151         final DatastoreContextIntrospector introspector = introspectorFactory.newInstance(datastoreType, properties);
 152         final AbstractDataStore datastore = DistributedDataStoreFactory.createInstance(actorSystemProvider,
 153             introspector.getContext(), introspector, snapshotRestore, config);
 154         datastore.setCloseable(schemaService.registerSchemaContextListener(datastore));
 155         final DatastoreState state = new DatastoreState(introspector, datastoreType, datastore, serviceType);
 156
 157         Futures.addCallback(datastore.initialSettleFuture(), state,
 158             // Note we are invoked from shard manager and therefore could block it, hence the round-trip to executor
 159             datastore.getActorUtils().getClientDispatcher()::execute);
 160         return state;
 161     }
 162 }