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      * Function called when the activator starts just after some
  40      * initializations are done by the
  41      * ComponentActivatorAbstractBase.
  42      *
  43      */
  44     public void init() {
  45     }
  46
  47     /**
  48      * Function called when the activator stops just before the
  49      * cleanup done by ComponentActivatorAbstractBase
  50      *
  51      */
  52     public void destroy() {
  53     }
  54
  55     /**
  56      * Function that is used to communicate to dependency manager the
  57      * list of known implementations for services inside a container
  58      *
  59      *
  60      * @return An array containing all the CLASS objects that will be
  61      * instantiated in order to get an fully working implementation
  62      * Object
  63      */
  64     public Object[] getImplementations() {
  65         Object[] res = { LoadBalancerService.class };
  66         return res;
  67     }
  68
  69     /**
  70      * Function that is called when configuration of the dependencies
  71      * is required.
  72      *
  73      * @param c dependency manager Component object, used for
  74      * configuring the dependencies exported and imported
  75      * @param imp Implementation class that is being configured,
  76      * needed as long as the same routine can configure multiple
  77      * implementations
  78      * @param containerName The containerName being configured, this allow
  79      * also optional per-container different behavior if needed, usually
  80      * should not be the case though.
  81      */
  82     public void configureInstance(Component c, Object imp, String containerName) {
  83         if (imp.equals(LoadBalancerService.class)) {
  84             // export the service
  85             Dictionary<String, String> props = new Hashtable<String, String>();
  86             props.put("salListenerName", "loadbalancer");
  87
  88             c.setInterface(new String[] { IListenDataPacket.class.getName(),
  89                         IConfigManager.class.getName()}, props);
  90
  91             c.add(createContainerServiceDependency(containerName).setService(
  92                     IDataPacketService.class).setCallbacks(
  93                     "setDataPacketService", "unsetDataPacketService")
  94                     .setRequired(true));
  95
  96             c.add(createContainerServiceDependency(containerName).setService(
  97                     IRouting.class).setCallbacks("setRouting", "unsetRouting")
  98                     .setRequired(false));
  99
 100             c.add(createContainerServiceDependency(containerName).setService(
 101                     IfIptoHost.class).setCallbacks("setHostTracker",
 102                     "unsetHostTracker").setRequired(true));
 103
 104             c.add(createContainerServiceDependency(containerName).setService(
 105                     IForwardingRulesManager.class).setCallbacks(
 106                     "setForwardingRulesManager", "unsetForwardingRulesManager")
 107                     .setRequired(true));
 108         }
 109     }
 110
 111     /**
 112      * Method which tells how many Global implementations are
 113      * supported by the bundle. This way we can tune the number of
 114      * components created. This components will be created ONLY at the
 115      * time of bundle startup and will be destroyed only at time of
 116      * bundle destruction, this is the major difference with the
 117      * implementation retrieved via getImplementations where all of
 118      * them are assumed to be in a container !
 119      *
 120      *
 121      * @return The list of implementations the bundle will support,
 122      * in Global version
 123      */
 124     protected Object[] getGlobalImplementations() {
 125         return null;
 126     }
 127
 128     /**
 129      * Configure the dependency for a given instance Global
 130      *
 131      * @param c Component assigned for this instance, this will be
 132      * what will be used for configuration
 133      * @param imp implementation to be configured
 134      * @param containerName container on which the configuration happens
 135      */
 136     protected void configureGlobalInstance(Component c, Object imp) {
 137     }
 138 }