openflowplugin-impl/src/main/java/org/opendaylight/openflowplugin/impl/services/sal/SalRoleServiceImpl.java

   1 /*
   2  * Copyright (c) 2015 Cisco Systems, Inc. and others.  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.openflowplugin.impl.services.sal;
   9
  10 import static java.util.Objects.requireNonNull;
  11
  12 import com.google.common.util.concurrent.Futures;
  13 import com.google.common.util.concurrent.ListenableFuture;
  14 import com.google.common.util.concurrent.MoreExecutors;
  15 import org.opendaylight.openflowplugin.api.openflow.connection.ConnectionContext.CONNECTION_STATE;
  16 import org.opendaylight.openflowplugin.api.openflow.device.DeviceContext;
  17 import org.opendaylight.openflowplugin.api.openflow.device.RequestContextStack;
  18 import org.opendaylight.openflowplugin.api.openflow.device.Xid;
  19 import org.opendaylight.openflowplugin.impl.services.AbstractSimpleService;
  20 import org.opendaylight.openflowplugin.impl.services.RoleService;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.OfHeader;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.RoleRequestOutput;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.role.service.rev150727.OfpRole;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.role.service.rev150727.SalRoleService;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.role.service.rev150727.SetRoleInput;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.role.service.rev150727.SetRoleOutput;
  27 import org.opendaylight.yangtools.yang.common.RpcResult;
  28 import org.opendaylight.yangtools.yang.common.Uint64;
  29 import org.slf4j.Logger;
  30 import org.slf4j.LoggerFactory;
  31
  32
  33 public final class SalRoleServiceImpl extends AbstractSimpleService<SetRoleInput, SetRoleOutput>
  34                                       implements SalRoleService  {
  35     private static final Logger LOG = LoggerFactory.getLogger(SalRoleServiceImpl.class);
  36     private static final Uint64 MAX_GENERATION_ID = Uint64.valueOf("ffffffffffffffff", 16);
  37
  38     private final DeviceContext deviceContext;
  39     private final RoleService roleService;
  40
  41     public SalRoleServiceImpl(final RequestContextStack requestContextStack, final DeviceContext deviceContext) {
  42         super(requestContextStack, deviceContext, SetRoleOutput.class);
  43         this.deviceContext = requireNonNull(deviceContext);
  44         roleService =  new RoleService(requestContextStack, deviceContext, RoleRequestOutput.class);
  45     }
  46
  47     @Override
  48     protected OfHeader buildRequest(final Xid xid, final SetRoleInput input) {
  49         return null;
  50     }
  51
  52     @Override
  53     public ListenableFuture<RpcResult<SetRoleOutput>> setRole(final SetRoleInput input) {
  54         LOG.info("SetRole called with input:{}", input);
  55
  56         // Check current connection state
  57         final CONNECTION_STATE state = deviceContext.getPrimaryConnectionContext().getConnectionState();
  58         switch (state) {
  59             case RIP:
  60                 LOG.info("Device {} has been disconnected", input.getNode());
  61                 return Futures.immediateFailedFuture(new Exception(String
  62                         .format("Device connection doesn't exist anymore. Primary connection status : %s",
  63                                 state)));
  64             case WORKING:
  65                 // We can proceed
  66                 LOG.trace("Device {} has been working", input.getNode());
  67                 break;
  68             default:
  69                 LOG.warn("Device {} is in state {}, role change is not allowed", input.getNode(), state);
  70                 return Futures.immediateFailedFuture(new Exception(String
  71                         .format("Unexpected device connection status : %s", state)));
  72         }
  73
  74         LOG.info("Requesting state change to {}", input.getControllerRole());
  75         return tryToChangeRole(input.getControllerRole());
  76     }
  77
  78     private ListenableFuture<RpcResult<SetRoleOutput>> tryToChangeRole(final OfpRole role) {
  79         LOG.info("RoleChangeTask called on device:{} OFPRole:{}", getDeviceInfo().getNodeId().getValue(), role);
  80
  81         return Futures.transformAsync(roleService.getGenerationIdFromDevice(getVersion()), generationId -> {
  82             LOG.debug("RoleChangeTask, GenerationIdFromDevice from device {} is {}",
  83                     getDeviceInfo().getNodeId().getValue(), generationId);
  84             final Uint64 nextGenerationId = getNextGenerationId(generationId);
  85             LOG.debug("nextGenerationId received from device:{} is {}",
  86                     getDeviceInfo().getNodeId().getValue(), nextGenerationId);
  87             return roleService.submitRoleChange(role, getVersion(), nextGenerationId);
  88         }, MoreExecutors.directExecutor());
  89     }
  90
  91     private static Uint64 getNextGenerationId(final Uint64 generationId) {
  92         if (generationId.compareTo(MAX_GENERATION_ID) < 0) {
  93             return Uint64.valueOf(generationId.longValue() + 1);
  94         } else {
  95             return Uint64.ZERO;
  96         }
  97     }
  98 }