opendaylight/networkconfiguration/neutron/implementation/src/main/java/org/opendaylight/controller/networkconfig/neutron/implementation/NeutronLoadBalancerPoolMemberInterface.java

   1 /*
   2  * Copyright (C) 2014 Red Hat, Inc.
   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.networkconfig.neutron.implementation;
  10
  11 import org.apache.felix.dm.Component;
  12 import org.opendaylight.controller.clustering.services.CacheConfigException;
  13 import org.opendaylight.controller.clustering.services.CacheExistException;
  14 import org.opendaylight.controller.clustering.services.IClusterContainerServices;
  15 import org.opendaylight.controller.clustering.services.IClusterServices;
  16 import org.opendaylight.controller.configuration.ConfigurationObject;
  17 import org.opendaylight.controller.configuration.IConfigurationContainerAware;
  18 import org.opendaylight.controller.configuration.IConfigurationContainerService;
  19 import org.opendaylight.controller.networkconfig.neutron.INeutronLoadBalancerPoolMemberCRUD;
  20 import org.opendaylight.controller.networkconfig.neutron.NeutronLoadBalancerPoolMember;
  21 import org.opendaylight.controller.sal.utils.IObjectReader;
  22 import org.opendaylight.controller.sal.utils.Status;
  23 import org.slf4j.Logger;
  24 import org.slf4j.LoggerFactory;
  25
  26 import java.io.FileNotFoundException;
  27 import java.io.IOException;
  28 import java.io.ObjectInputStream;
  29 import java.lang.reflect.Method;
  30 import java.util.ArrayList;
  31 import java.util.Dictionary;
  32 import java.util.EnumSet;
  33 import java.util.HashSet;
  34 import java.util.List;
  35 import java.util.Map;
  36 import java.util.Set;
  37 import java.util.concurrent.ConcurrentMap;
  38
  39 public class NeutronLoadBalancerPoolMemberInterface
  40         implements INeutronLoadBalancerPoolMemberCRUD, IConfigurationContainerAware,
  41         IObjectReader {
  42     private static final Logger logger = LoggerFactory.getLogger(NeutronLoadBalancerPoolMemberInterface.class);
  43     private static final String FILE_NAME = "neutron.loadBalancerPoolMember.conf";
  44     private String containerName = null;
  45
  46     private IClusterContainerServices clusterContainerService = null;
  47     private IConfigurationContainerService configurationService;
  48     private ConcurrentMap<String, NeutronLoadBalancerPoolMember> loadBalancerPoolMemberDB;
  49
  50     // methods needed for creating caches
  51     void setClusterContainerService(IClusterContainerServices s) {
  52         logger.debug("Cluster Service set");
  53         clusterContainerService = s;
  54     }
  55
  56     void unsetClusterContainerService(IClusterContainerServices s) {
  57         if (clusterContainerService == s) {
  58             logger.debug("Cluster Service removed!");
  59             clusterContainerService = null;
  60         }
  61     }
  62
  63     public void setConfigurationContainerService(IConfigurationContainerService service) {
  64         logger.trace("Configuration service set: {}", service);
  65         configurationService = service;
  66     }
  67
  68     public void unsetConfigurationContainerService(IConfigurationContainerService service) {
  69         logger.trace("Configuration service removed: {}", service);
  70         configurationService = null;
  71     }
  72
  73     private void allocateCache() {
  74         if (this.clusterContainerService == null) {
  75             logger.error("un-initialized clusterContainerService, can't create cache");
  76             return;
  77         }
  78         logger.debug("Creating Cache for Neutron LoadBalancerPoolMember");
  79         try {
  80             // neutron caches
  81             this.clusterContainerService.createCache("neutronLoadBalancerPoolMembers",
  82                     EnumSet.of(IClusterServices.cacheMode.NON_TRANSACTIONAL));
  83         } catch(CacheConfigException cce) {
  84             logger.error("Cache couldn't be created for Neutron LoadBalancerPoolMember -  check cache mode");
  85         } catch(CacheExistException cce) {
  86             logger.error("Cache for Neutron LoadBalancerPoolMember already exists, destroy and recreate");
  87         }
  88         logger.debug("Cache successfully created for Neutron LoadBalancerPoolMember");
  89     }
  90
  91     @SuppressWarnings({"unchecked"})
  92     private void retrieveCache() {
  93         if (clusterContainerService == null) {
  94             logger.error("un-initialized clusterContainerService, can't retrieve cache");
  95             return;
  96         }
  97
  98         logger.debug("Retrieving cache for Neutron LoadBalancerPoolMember");
  99         loadBalancerPoolMemberDB = (ConcurrentMap<String, NeutronLoadBalancerPoolMember>) clusterContainerService
 100                 .getCache("neutronLoadBalancerPoolMembers");
 101         if (loadBalancerPoolMemberDB == null) {
 102             logger.error("Cache couldn't be retrieved for Neutron LoadBalancerPoolMember");
 103         }
 104         logger.debug("Cache was successfully retrieved for Neutron LoadBalancerPoolMember");
 105     }
 106
 107     private void destroyCache() {
 108         if (clusterContainerService == null) {
 109             logger.error("un-initialized clusterMger, can't destroy cache");
 110             return;
 111         }
 112         logger.debug("Destroying Cache for HostTracker");
 113         clusterContainerService.destroyCache("neutronLoadBalancerPoolMembers");
 114     }
 115
 116     private void startUp() {
 117         allocateCache();
 118         retrieveCache();
 119         loadConfiguration();
 120     }
 121
 122     /**
 123      * Function called by the dependency manager when all the required
 124      * dependencies are satisfied
 125      */
 126     void init(Component c) {
 127         Dictionary<?, ?> props = c.getServiceProperties();
 128         if (props != null) {
 129             this.containerName = (String) props.get("containerName");
 130             logger.debug("Running containerName: {}", this.containerName);
 131         } else {
 132             // In the Global instance case the containerName is empty
 133             this.containerName = "";
 134         }
 135         startUp();
 136     }
 137
 138     /**
 139      * Function called by the dependency manager when at least one dependency
 140      * become unsatisfied or when the component is shutting down because for
 141      * example bundle is being stopped.
 142      */
 143     void destroy() {
 144         destroyCache();
 145     }
 146
 147     /**
 148      * Function called by dependency manager after "init ()" is called and after
 149      * the services provided by the class are registered in the service registry
 150      */
 151     void start() {
 152     }
 153
 154     /**
 155      * Function called by the dependency manager before the services exported by
 156      * the component are unregistered, this will be followed by a "destroy ()"
 157      * calls
 158      */
 159     void stop() {
 160     }
 161
 162     // this method uses reflection to update an object from it's delta.
 163
 164     private boolean overwrite(Object target, Object delta) {
 165         Method[] methods = target.getClass().getMethods();
 166
 167         for (Method toMethod : methods) {
 168             if (toMethod.getDeclaringClass().equals(target.getClass())
 169                     && toMethod.getName().startsWith("set")) {
 170
 171                 String toName = toMethod.getName();
 172                 String fromName = toName.replace("set", "get");
 173
 174                 try {
 175                     Method fromMethod = delta.getClass().getMethod(fromName);
 176                     Object value = fromMethod.invoke(delta, (Object[]) null);
 177                     if (value != null) {
 178                         toMethod.invoke(target, value);
 179                     }
 180                 } catch(Exception e) {
 181                     e.printStackTrace();
 182                     return false;
 183                 }
 184             }
 185         }
 186         return true;
 187     }
 188
 189     @Override
 190     public boolean neutronLoadBalancerPoolMemberExists(String uuid) {
 191         return loadBalancerPoolMemberDB.containsKey(uuid);
 192     }
 193
 194     @Override
 195     public NeutronLoadBalancerPoolMember getNeutronLoadBalancerPoolMember(String uuid) {
 196         if (!neutronLoadBalancerPoolMemberExists(uuid)) {
 197             logger.debug("No LoadBalancerPoolMember Have Been Defined");
 198             return null;
 199         }
 200         return loadBalancerPoolMemberDB.get(uuid);
 201     }
 202
 203     @Override
 204     public List<NeutronLoadBalancerPoolMember> getAllNeutronLoadBalancerPoolMembers() {
 205         Set<NeutronLoadBalancerPoolMember> allLoadBalancerPoolMembers = new HashSet<NeutronLoadBalancerPoolMember>();
 206         for (Map.Entry<String, NeutronLoadBalancerPoolMember> entry : loadBalancerPoolMemberDB.entrySet()) {
 207             NeutronLoadBalancerPoolMember loadBalancerPoolMember = entry.getValue();
 208             allLoadBalancerPoolMembers.add(loadBalancerPoolMember);
 209         }
 210         logger.debug("Exiting getLoadBalancerPoolMembers, Found {} OpenStackLoadBalancerPoolMember",
 211                 allLoadBalancerPoolMembers.size());
 212         List<NeutronLoadBalancerPoolMember> ans = new ArrayList<NeutronLoadBalancerPoolMember>();
 213         ans.addAll(allLoadBalancerPoolMembers);
 214         return ans;
 215     }
 216
 217     @Override
 218     public boolean addNeutronLoadBalancerPoolMember(NeutronLoadBalancerPoolMember input) {
 219         if (neutronLoadBalancerPoolMemberExists(input.getPoolMemberID())) {
 220             return false;
 221         }
 222         loadBalancerPoolMemberDB.putIfAbsent(input.getPoolMemberID(), input);
 223         return true;
 224     }
 225
 226     @Override
 227     public boolean removeNeutronLoadBalancerPoolMember(String uuid) {
 228         if (!neutronLoadBalancerPoolMemberExists(uuid)) {
 229             return false;
 230         }
 231         loadBalancerPoolMemberDB.remove(uuid);
 232         return true;
 233     }
 234
 235     @Override
 236     public boolean updateNeutronLoadBalancerPoolMember(String uuid, NeutronLoadBalancerPoolMember delta) {
 237         if (!neutronLoadBalancerPoolMemberExists(uuid)) {
 238             return false;
 239         }
 240         NeutronLoadBalancerPoolMember target = loadBalancerPoolMemberDB.get(uuid);
 241         return overwrite(target, delta);
 242     }
 243
 244     @Override
 245     public boolean neutronLoadBalancerPoolMemberInUse(String loadBalancerPoolMemberID) {
 246         return !neutronLoadBalancerPoolMemberExists(loadBalancerPoolMemberID);
 247     }
 248
 249     private void loadConfiguration() {
 250         for (ConfigurationObject conf : configurationService.retrieveConfiguration(this, FILE_NAME)) {
 251             NeutronLoadBalancerPoolMember nn = (NeutronLoadBalancerPoolMember) conf;
 252             loadBalancerPoolMemberDB.put(nn.getPoolMemberID(), nn);
 253         }
 254     }
 255
 256     @Override
 257     public Status saveConfiguration() {
 258         return configurationService.persistConfiguration(
 259                 new ArrayList<ConfigurationObject>(loadBalancerPoolMemberDB.values()),
 260                 FILE_NAME);
 261     }
 262
 263     @Override
 264     public Object readObject(ObjectInputStream ois) throws FileNotFoundException, IOException, ClassNotFoundException {
 265         return ois.readObject();
 266     }
 267 }