2 * Copyright (c) 2015 Cisco Systems, Inc. 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.openflowplugin.impl.role;
10 import com.google.common.base.Preconditions;
11 import java.util.concurrent.Semaphore;
12 import java.util.concurrent.TimeUnit;
13 import javax.annotation.Nonnull;
14 import javax.annotation.Nullable;
15 import org.opendaylight.controller.md.sal.common.api.clustering.CandidateAlreadyRegisteredException;
16 import org.opendaylight.controller.md.sal.common.api.clustering.Entity;
17 import org.opendaylight.controller.md.sal.common.api.clustering.EntityOwnershipCandidateRegistration;
18 import org.opendaylight.controller.md.sal.common.api.clustering.EntityOwnershipService;
19 import org.opendaylight.mdsal.singleton.common.api.ServiceGroupIdentifier;
20 import org.opendaylight.openflowplugin.api.openflow.device.DeviceInfo;
21 import org.opendaylight.openflowplugin.api.openflow.device.RequestContext;
22 import org.opendaylight.openflowplugin.api.openflow.lifecycle.LifecycleConductor;
23 import org.opendaylight.openflowplugin.api.openflow.role.RoleContext;
24 import org.opendaylight.openflowplugin.impl.rpc.AbstractRequestContext;
25 import org.opendaylight.yang.gen.v1.urn.opendaylight.role.service.rev150727.SalRoleService;
26 import org.slf4j.Logger;
27 import org.slf4j.LoggerFactory;
30 * Role context hold information about entity ownership registration,
31 * register and unregister candidate (main and tx)
33 class RoleContextImpl implements RoleContext {
35 private static final Logger LOG = LoggerFactory.getLogger(RoleContextImpl.class);
36 private static final int TIMEOUT = 12;
38 private final EntityOwnershipService entityOwnershipService;
39 private volatile EntityOwnershipCandidateRegistration entityOwnershipCandidateRegistration = null;
40 private volatile EntityOwnershipCandidateRegistration txEntityOwnershipCandidateRegistration = null;
42 private final Entity entity;
43 private final Entity txEntity;
45 private SalRoleService salRoleService = null;
47 private final Semaphore roleChangeGuard = new Semaphore(1, true);
49 private final LifecycleConductor conductor;
50 private final DeviceInfo deviceInfo;
51 private CONTEXT_STATE state;
53 RoleContextImpl(final DeviceInfo deviceInfo,
54 final EntityOwnershipService entityOwnershipService,
56 final Entity txEntity,
57 final LifecycleConductor lifecycleConductor) {
58 this.entityOwnershipService = entityOwnershipService;
60 this.txEntity = txEntity;
61 this.conductor = lifecycleConductor;
62 this.deviceInfo = deviceInfo;
63 state = CONTEXT_STATE.INITIALIZATION;
67 public boolean initialization() {
68 LOG.info("Initialization main candidate for node {}", getDeviceInfo().getNodeId());
69 setState(CONTEXT_STATE.WORKING);
70 return registerCandidate(this.entity);
74 public void unregisterAllCandidates() {
75 LOG.info("Role context closed, unregistering all candidates for ownership for node {}", getDeviceInfo().getNodeId());
76 if (isMainCandidateRegistered()) {
77 unregisterCandidate(this.entity);
79 if (isTxCandidateRegistered()) {
80 unregisterCandidate(this.txEntity);
86 public <T> RequestContext<T> createRequestContext() {
87 return new AbstractRequestContext<T>(conductor.reserveXidForDeviceMessage(getDeviceInfo())) {
95 public void setSalRoleService(@Nonnull final SalRoleService salRoleService) {
96 Preconditions.checkNotNull(salRoleService);
97 this.salRoleService = salRoleService;
101 public SalRoleService getSalRoleService() {
102 return this.salRoleService;
106 public Entity getEntity() {
111 public Entity getTxEntity() {
112 return this.txEntity;
116 public boolean isMainCandidateRegistered() {
117 return entityOwnershipCandidateRegistration != null;
121 public boolean isTxCandidateRegistered() {
122 return txEntityOwnershipCandidateRegistration != null;
126 public boolean registerCandidate(final Entity entity_) {
127 boolean permit = false;
129 permit = roleChangeGuard.tryAcquire(TIMEOUT, TimeUnit.SECONDS);
131 LOG.debug("Register candidate for entity {}", entity_);
132 if (entity_.equals(this.entity)) {
133 entityOwnershipCandidateRegistration = entityOwnershipService.registerCandidate(entity_);
135 txEntityOwnershipCandidateRegistration = entityOwnershipService.registerCandidate(entity_);
140 } catch (final CandidateAlreadyRegisteredException e) {
141 LOG.warn("Candidate for entity {} is already registered.", entity_.getType());
143 } catch (final InterruptedException e) {
144 LOG.warn("Cannot acquire semaphore for register entity {} candidate.", entity_.getType());
148 roleChangeGuard.release();
155 public boolean unregisterCandidate(final Entity entity_) {
156 boolean permit = false;
158 permit = roleChangeGuard.tryAcquire(TIMEOUT, TimeUnit.SECONDS);
160 if (entity_.equals(this.entity)) {
161 if (entityOwnershipCandidateRegistration != null) {
162 LOG.debug("Unregister candidate for entity {}", entity_);
163 entityOwnershipCandidateRegistration.close();
164 entityOwnershipCandidateRegistration = null;
167 if (txEntityOwnershipCandidateRegistration != null) {
168 LOG.debug("Unregister candidate for tx entity {}", entity_);
169 txEntityOwnershipCandidateRegistration.close();
170 txEntityOwnershipCandidateRegistration = null;
176 } catch (final InterruptedException e) {
177 LOG.warn("Cannot acquire semaphore for unregister entity {} candidate.", entity_.getType());
181 roleChangeGuard.release();
188 public void close() {
189 setState(CONTEXT_STATE.TERMINATION);
190 unregisterAllCandidates();
193 public boolean isMaster(){
194 return (txEntityOwnershipCandidateRegistration != null && entityOwnershipCandidateRegistration != null);
198 public CONTEXT_STATE getState() {
203 public void setState(CONTEXT_STATE state) {
208 public ServiceGroupIdentifier getServiceIdentifier() {
209 return this.deviceInfo.getServiceIdentifier();
213 public DeviceInfo getDeviceInfo() {
214 return this.deviceInfo;