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 com.google.common.base.Preconditions;
  11 import com.google.common.util.concurrent.Futures;
  12 import com.google.common.util.concurrent.JdkFutureAdapters;
  13 import com.google.common.util.concurrent.ListenableFuture;
  14 import java.math.BigInteger;
  15 import java.util.concurrent.Future;
  16 import org.opendaylight.openflowplugin.api.openflow.connection.ConnectionContext.CONNECTION_STATE;
  17 import org.opendaylight.openflowplugin.api.openflow.device.DeviceContext;
  18 import org.opendaylight.openflowplugin.api.openflow.device.RequestContextStack;
  19 import org.opendaylight.openflowplugin.api.openflow.device.Xid;
  20 import org.opendaylight.openflowplugin.impl.services.AbstractSimpleService;
  21 import org.opendaylight.openflowplugin.impl.services.RoleService;
  22 import org.opendaylight.openflowplugin.impl.services.util.ServiceException;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.OfHeader;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.RoleRequestOutput;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.role.service.rev150727.OfpRole;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.role.service.rev150727.SalRoleService;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.role.service.rev150727.SetRoleInput;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.role.service.rev150727.SetRoleOutput;
  29 import org.opendaylight.yangtools.yang.common.RpcResult;
  30 import org.slf4j.Logger;
  31 import org.slf4j.LoggerFactory;
  32
  33
  34 public final class SalRoleServiceImpl extends AbstractSimpleService<SetRoleInput, SetRoleOutput>
  35                                       implements SalRoleService  {
  36
  37     private static final Logger LOG = LoggerFactory.getLogger(SalRoleServiceImpl.class);
  38     private static final BigInteger MAX_GENERATION_ID = new BigInteger("ffffffffffffffff", 16);
  39
  40     private final DeviceContext deviceContext;
  41     private final RoleService roleService;
  42
  43     public SalRoleServiceImpl(final RequestContextStack requestContextStack, final DeviceContext deviceContext) {
  44         super(requestContextStack, deviceContext, SetRoleOutput.class);
  45         this.deviceContext = Preconditions.checkNotNull(deviceContext);
  46         this.roleService =  new RoleService(requestContextStack, deviceContext, RoleRequestOutput.class);
  47     }
  48
  49     @Override
  50     protected OfHeader buildRequest(final Xid xid, final SetRoleInput input) throws ServiceException {
  51         return null;
  52     }
  53
  54     @Override
  55     public Future<RpcResult<SetRoleOutput>> setRole(final SetRoleInput input) {
  56         LOG.info("SetRole called with input:{}", input);
  57
  58         // Check current connection state
  59         final CONNECTION_STATE state = deviceContext.getPrimaryConnectionContext().getConnectionState();
  60         switch (state) {
  61             case RIP:
  62                 LOG.info("Device {} has been disconnected", input.getNode());
  63                 return Futures.immediateFailedFuture(new Exception(String
  64                         .format("Device connection doesn't exist anymore. Primary connection status : %s",
  65                                 state)));
  66             case WORKING:
  67                 // We can proceed
  68                 LOG.trace("Device {} has been working", input.getNode());
  69                 break;
  70             default:
  71                 LOG.warn("Device {} is in state {}, role change is not allowed", input.getNode(), state);
  72                 return Futures.immediateFailedFuture(new Exception(String
  73                         .format("Unexpected device connection status : %s", state)));
  74         }
  75
  76         LOG.info("Requesting state change to {}", input.getControllerRole());
  77         return tryToChangeRole(input.getControllerRole());
  78     }
  79
  80     private ListenableFuture<RpcResult<SetRoleOutput>> tryToChangeRole(final OfpRole role) {
  81         LOG.info("RoleChangeTask called on device:{} OFPRole:{}", getDeviceInfo().getNodeId().getValue(), role);
  82
  83         final Future<BigInteger> generationFuture = roleService.getGenerationIdFromDevice(getVersion());
  84
  85         return Futures.transformAsync(JdkFutureAdapters.listenInPoolThread(generationFuture), generationId -> {
  86             LOG.debug("RoleChangeTask, GenerationIdFromDevice from device {} is {}",
  87                     getDeviceInfo().getNodeId().getValue(), generationId);
  88             final BigInteger nextGenerationId = getNextGenerationId(generationId);
  89             LOG.debug("nextGenerationId received from device:{} is {}",
  90                     getDeviceInfo().getNodeId().getValue(), nextGenerationId);
  91             final Future<RpcResult<SetRoleOutput>> submitRoleFuture =
  92                     roleService.submitRoleChange(role, getVersion(), nextGenerationId);
  93             return JdkFutureAdapters.listenInPoolThread(submitRoleFuture);
  94         });
  95     }
  96
  97     private static BigInteger getNextGenerationId(final BigInteger generationId) {
  98         if (generationId.compareTo(MAX_GENERATION_ID) < 0) {
  99             return generationId.add(BigInteger.ONE);
 100         } else {
 101             return BigInteger.ZERO;
 102         }
 103     }
 104 }