2 * Copyright (c) 2017, 2020 PANTHEON.tech, s.r.o. and others. All rights reserved.
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
8 package org.opendaylight.mdsal.dom.schema.osgi.impl;
10 import static java.util.Objects.requireNonNull;
12 import java.util.List;
13 import java.util.NoSuchElementException;
14 import org.checkerframework.checker.lock.qual.GuardedBy;
15 import org.checkerframework.checker.lock.qual.Holding;
16 import org.opendaylight.binding.runtime.api.ModuleInfoSnapshot;
17 import org.opendaylight.binding.runtime.spi.ModuleInfoSnapshotBuilder;
18 import org.opendaylight.yangtools.concepts.ObjectRegistration;
19 import org.opendaylight.yangtools.yang.binding.YangModuleInfo;
20 import org.opendaylight.yangtools.yang.model.parser.api.YangParserFactory;
21 import org.osgi.service.component.ComponentFactory;
22 import org.osgi.service.component.ComponentInstance;
23 import org.slf4j.Logger;
24 import org.slf4j.LoggerFactory;
27 * Update SchemaContext service in Service Registry each time new YangModuleInfo is added or removed.
29 final class YangModuleInfoRegistry {
30 private static final Logger LOG = LoggerFactory.getLogger(YangModuleInfoRegistry.class);
32 private final ComponentFactory contextFactory;
33 private final ModuleInfoSnapshotBuilder moduleInfoRegistry;
36 private ComponentInstance currentInstance;
38 private ModuleInfoSnapshot currentSnapshot;
40 private int generation;
42 private volatile boolean ignoreScanner = true;
44 YangModuleInfoRegistry(final ComponentFactory contextFactory, final YangParserFactory factory) {
45 this.contextFactory = requireNonNull(contextFactory);
46 moduleInfoRegistry = new ModuleInfoSnapshotBuilder("binding-dom-codec", factory);
49 // Invocation from scanner, we may want to ignore this in order to not process partial updates
50 void scannerUpdate() {
58 synchronized void scannerShutdown() {
62 synchronized void enableScannerAndUpdate() {
63 ignoreScanner = false;
67 synchronized void close() {
69 if (currentInstance != null) {
70 currentInstance.dispose();
71 currentInstance = null;
75 List<ObjectRegistration<YangModuleInfo>> registerInfos(final List<YangModuleInfo> infos) {
76 return moduleInfoRegistry.registerModuleInfos(infos);
80 private void updateService() {
81 final ModuleInfoSnapshot newSnapshot;
83 newSnapshot = moduleInfoRegistry.build();
84 } catch (NoSuchElementException e) {
85 LOG.debug("No snapshot available", e);
88 if (newSnapshot.equals(currentSnapshot)) {
89 LOG.debug("No update to snapshot");
94 final ComponentInstance newInstance = contextFactory.newInstance(
95 OSGiEffectiveModelImpl.props(nextGeneration(), newSnapshot));
96 if (currentInstance != null) {
97 currentInstance.dispose();
99 currentInstance = newInstance;
100 currentSnapshot = newSnapshot;
104 private long nextGeneration() {
105 return generation == -1 ? -1 : ++generation;