opendaylight/samples/loadbalancer/src/main/java/org/opendaylight/controller/samples/loadbalancer/internal/Activator.java

   1 /*
   2  * Copyright IBM Corporation, 2013.  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.samples.loadbalancer.internal;
   9
  10 import java.util.Dictionary;
  11 import java.util.Hashtable;
  12
  13 import org.apache.felix.dm.Component;
  14 import org.slf4j.Logger;
  15 import org.slf4j.LoggerFactory;
  16
  17 import org.opendaylight.controller.forwardingrulesmanager.IForwardingRulesManager;
  18 import org.opendaylight.controller.hosttracker.IfIptoHost;
  19 import org.opendaylight.controller.sal.core.ComponentActivatorAbstractBase;
  20 import org.opendaylight.controller.sal.packet.IDataPacketService;
  21 import org.opendaylight.controller.sal.packet.IListenDataPacket;
  22 import org.opendaylight.controller.sal.routing.IRouting;
  23 import org.opendaylight.controller.samples.loadbalancer.IConfigManager;
  24
  25 /**
  26  * Main application activator class for registering the dependencies and
  27  * initialising the load balancer application.
  28  *
  29  */
  30
  31 public class Activator extends ComponentActivatorAbstractBase {
  32
  33     /*
  34      * Logger instance
  35      */
  36     protected static final Logger logger = LoggerFactory.getLogger(Activator.class);
  37
  38
  39     /**
  40      * Function that is used to communicate to dependency manager the
  41      * list of known implementations for services inside a container
  42      *
  43      *
  44      * @return An array containing all the CLASS objects that will be
  45      * instantiated in order to get an fully working implementation
  46      * Object
  47      */
  48     public Object[] getImplementations() {
  49         Object[] res = { LoadBalancerService.class };
  50         return res;
  51     }
  52
  53     /**
  54      * Function that is called when configuration of the dependencies
  55      * is required.
  56      *
  57      * @param c dependency manager Component object, used for
  58      * configuring the dependencies exported and imported
  59      * @param imp Implementation class that is being configured,
  60      * needed as long as the same routine can configure multiple
  61      * implementations
  62      * @param containerName The containerName being configured, this allow
  63      * also optional per-container different behavior if needed, usually
  64      * should not be the case though.
  65      */
  66     public void configureInstance(Component c, Object imp, String containerName) {
  67         if (imp.equals(LoadBalancerService.class)) {
  68             // export the service
  69             Dictionary<String, String> props = new Hashtable<String, String>();
  70             props.put("salListenerName", "loadbalancer");
  71
  72             c.setInterface(new String[] { IListenDataPacket.class.getName(),
  73                         IConfigManager.class.getName()}, props);
  74
  75             c.add(createContainerServiceDependency(containerName).setService(
  76                     IDataPacketService.class).setCallbacks(
  77                     "setDataPacketService", "unsetDataPacketService")
  78                     .setRequired(true));
  79
  80             c.add(createContainerServiceDependency(containerName).setService(
  81                     IRouting.class).setCallbacks("setRouting", "unsetRouting")
  82                     .setRequired(false));
  83
  84             c.add(createContainerServiceDependency(containerName).setService(
  85                     IfIptoHost.class).setCallbacks("setHostTracker",
  86                     "unsetHostTracker").setRequired(true));
  87
  88             c.add(createContainerServiceDependency(containerName).setService(
  89                     IForwardingRulesManager.class).setCallbacks(
  90                     "setForwardingRulesManager", "unsetForwardingRulesManager")
  91                     .setRequired(true));
  92         }
  93     }
  94
  95     /**
  96      * Method which tells how many Global implementations are
  97      * supported by the bundle. This way we can tune the number of
  98      * components created. This components will be created ONLY at the
  99      * time of bundle startup and will be destroyed only at time of
 100      * bundle destruction, this is the major difference with the
 101      * implementation retrieved via getImplementations where all of
 102      * them are assumed to be in a container !
 103      *
 104      *
 105      * @return The list of implementations the bundle will support,
 106      * in Global version
 107      */
 108     protected Object[] getGlobalImplementations() {
 109         return null;
 110     }
 111
 112     /**
 113      * Configure the dependency for a given instance Global
 114      *
 115      * @param c Component assigned for this instance, this will be
 116      * what will be used for configuration
 117      * @param imp implementation to be configured
 118      * @param containerName container on which the configuration happens
 119      */
 120     protected void configureGlobalInstance(Component c, Object imp) {
 121     }
 122 }