openflowplugin-impl/src/main/java/org/opendaylight/openflowplugin/impl/role/RoleManagerImpl.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.role;
   9
  10 import com.google.common.annotations.VisibleForTesting;
  11 import com.google.common.base.Preconditions;
  12 import com.google.common.base.Verify;
  13 import com.google.common.collect.Iterators;
  14 import com.google.common.util.concurrent.CheckedFuture;
  15 import com.google.common.util.concurrent.FutureCallback;
  16 import com.google.common.util.concurrent.Futures;
  17 import io.netty.util.HashedWheelTimer;
  18 import java.util.Iterator;
  19 import java.util.concurrent.ConcurrentHashMap;
  20 import java.util.concurrent.ConcurrentMap;
  21 import javax.annotation.CheckForNull;
  22 import javax.annotation.Nonnull;
  23 import javax.annotation.Nullable;
  24 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  25 import org.opendaylight.controller.md.sal.binding.api.WriteTransaction;
  26 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  27 import org.opendaylight.controller.md.sal.common.api.data.TransactionCommitFailedException;
  28 import org.opendaylight.openflowplugin.api.openflow.OFPContext;
  29 import org.opendaylight.openflowplugin.api.openflow.device.DeviceContext;
  30 import org.opendaylight.openflowplugin.api.openflow.device.DeviceInfo;
  31 import org.opendaylight.openflowplugin.api.openflow.device.handlers.DeviceInitializationPhaseHandler;
  32 import org.opendaylight.openflowplugin.api.openflow.device.handlers.DeviceTerminationPhaseHandler;
  33 import org.opendaylight.openflowplugin.api.openflow.lifecycle.LifecycleService;
  34 import org.opendaylight.openflowplugin.api.openflow.role.RoleContext;
  35 import org.opendaylight.openflowplugin.api.openflow.role.RoleManager;
  36 import org.opendaylight.openflowplugin.impl.services.SalRoleServiceImpl;
  37 import org.opendaylight.openflowplugin.impl.util.DeviceStateUtil;
  38 import org.opendaylight.yang.gen.v1.urn.opendaylight.role.service.rev150727.SetRoleOutput;
  39 import org.opendaylight.yangtools.yang.common.RpcResult;
  40 import org.slf4j.Logger;
  41 import org.slf4j.LoggerFactory;
  42
  43 /**
  44  * Gets invoked from RpcManagerInitial, registers a candidate with EntityOwnershipService.
  45  * On receipt of the ownership notification, makes an rpc call to SalRoleService.
  46  *
  47  * Hands over to StatisticsManager at the end.
  48  */
  49 public class RoleManagerImpl implements RoleManager {
  50     private static final Logger LOG = LoggerFactory.getLogger(RoleManagerImpl.class);
  51
  52     // Maximum limit of timeout retries when cleaning DS, to prevent infinite recursive loops
  53     private static final int MAX_CLEAN_DS_RETRIES = 3;
  54
  55     private DeviceInitializationPhaseHandler deviceInitializationPhaseHandler;
  56     private DeviceTerminationPhaseHandler deviceTerminationPhaseHandler;
  57     private final DataBroker dataBroker;
  58     private final ConcurrentMap<DeviceInfo, RoleContext> contexts = new ConcurrentHashMap<>();
  59     private final HashedWheelTimer hashedWheelTimer;
  60
  61     public RoleManagerImpl(final DataBroker dataBroker, final HashedWheelTimer hashedWheelTimer) {
  62         this.dataBroker = Preconditions.checkNotNull(dataBroker);
  63         this.hashedWheelTimer = hashedWheelTimer;
  64     }
  65
  66     @Override
  67     public void setDeviceInitializationPhaseHandler(final DeviceInitializationPhaseHandler handler) {
  68         deviceInitializationPhaseHandler = handler;
  69     }
  70
  71     @Override
  72     public void onDeviceContextLevelUp(@CheckForNull final DeviceInfo deviceInfo, final LifecycleService lifecycleService) throws Exception {
  73         final DeviceContext deviceContext = Preconditions.checkNotNull(lifecycleService.getDeviceContext());
  74         final RoleContext roleContext = new RoleContextImpl(deviceInfo, hashedWheelTimer, this);
  75         roleContext.setSalRoleService(new SalRoleServiceImpl(roleContext, deviceContext));
  76         Verify.verify(contexts.putIfAbsent(deviceInfo, roleContext) == null, "Role context for master Node %s is still not closed.", deviceInfo.getLOGValue());
  77         Futures.addCallback(roleContext.makeDeviceSlave(), new FutureCallback<RpcResult<SetRoleOutput>>() {
  78                     @Override
  79                     public void onSuccess(@Nullable RpcResult<SetRoleOutput> setRoleOutputRpcResult) {
  80                         if (LOG.isDebugEnabled()) {
  81                             LOG.debug("Role SLAVE was successfully propagated on device, node {}", deviceInfo.getLOGValue());
  82                         }
  83                     }
  84
  85                     @Override
  86                     public void onFailure(Throwable throwable) {
  87                         LOG.warn("Was not able to set role SLAVE to device on node {} ",deviceInfo.getLOGValue());
  88                     }
  89                 });
  90         lifecycleService.setRoleContext(roleContext);
  91         deviceInitializationPhaseHandler.onDeviceContextLevelUp(deviceInfo, lifecycleService);
  92     }
  93
  94     @Override
  95     public void close() {
  96         LOG.debug("Close method on role manager was called.");
  97         for (final Iterator<RoleContext> iterator = Iterators.consumingIterator(contexts.values().iterator()); iterator.hasNext();) {
  98             // got here because last known role is LEADER and DS might need clearing up
  99             final RoleContext roleContext = iterator.next();
 100             contexts.remove(roleContext.getDeviceInfo());
 101             removeDeviceFromOperationalDS(roleContext.getDeviceInfo(), MAX_CLEAN_DS_RETRIES);
 102         }
 103     }
 104
 105     @Override
 106     public void onDeviceContextLevelDown(final DeviceInfo deviceInfo) {
 107         contexts.remove(deviceInfo);
 108         deviceTerminationPhaseHandler.onDeviceContextLevelDown(deviceInfo);
 109     }
 110
 111     @Override
 112     public CheckedFuture<Void, TransactionCommitFailedException> removeDeviceFromOperationalDS(final DeviceInfo deviceInfo, final int numRetries) {
 113         final WriteTransaction delWtx = dataBroker.newWriteOnlyTransaction();
 114         delWtx.delete(LogicalDatastoreType.OPERATIONAL, DeviceStateUtil.createNodeInstanceIdentifier(deviceInfo.getNodeId()));
 115         final CheckedFuture<Void, TransactionCommitFailedException> delFuture = delWtx.submit();
 116
 117         Futures.addCallback(delFuture, new FutureCallback<Void>() {
 118             @Override
 119             public void onSuccess(final Void result) {
 120                 LOG.debug("Delete Node {} was successful", deviceInfo.getLOGValue());
 121                 contexts.remove(deviceInfo);
 122             }
 123
 124             @Override
 125             public void onFailure(@Nonnull final Throwable t) {
 126                 // If we have any retries left, we will try to clean the datastore again
 127                 if (numRetries > 0) {
 128                     // We "used" one retry here, so decrement it
 129                     final int curRetries = numRetries - 1;
 130                     LOG.debug("Delete node {} failed with exception {}. Trying again (retries left: {})", deviceInfo.getLOGValue(), t, curRetries);
 131                     // Recursive call to this method with "one less" retry
 132                     removeDeviceFromOperationalDS(deviceInfo, curRetries);
 133                     return;
 134                 }
 135
 136                 // No retries left, so we will just close the role context, and ignore datastore cleanup
 137                 LOG.warn("Delete node {} failed with exception {}. No retries left, aborting", deviceInfo.getLOGValue(), t);
 138                 contexts.remove(deviceInfo);
 139             }
 140         });
 141
 142         return delFuture;
 143     }
 144
 145     @Override
 146     public void setDeviceTerminationPhaseHandler(final DeviceTerminationPhaseHandler handler) {
 147         deviceTerminationPhaseHandler = handler;
 148     }
 149
 150     @VisibleForTesting
 151     RoleContext getRoleContext(final DeviceInfo deviceInfo){
 152         return contexts.get(deviceInfo);
 153     }
 154
 155     @Override
 156     public <T extends OFPContext> T gainContext(final DeviceInfo deviceInfo) {
 157         return (T) contexts.get(deviceInfo);
 158     }
 159 }