| /* |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| */ |
| |
| package org.apache.qpid.server.virtualhostnode.berkeleydb; |
| |
| import static org.apache.qpid.server.virtualhostnode.berkeleydb.BDBHAVirtualHostNodeImpl.MUTATE_JE_TIMEOUT_MS; |
| |
| import java.util.Date; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.TimeoutException; |
| |
| import com.google.common.util.concurrent.ListenableFuture; |
| import com.google.common.util.concurrent.SettableFuture; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.qpid.server.logging.EventLogger; |
| import org.apache.qpid.server.logging.Outcome; |
| import org.apache.qpid.server.logging.messages.HighAvailabilityMessages; |
| import org.apache.qpid.server.logging.subjects.BDBHAVirtualHostNodeLogSubject; |
| import org.apache.qpid.server.logging.subjects.GroupLogSubject; |
| import org.apache.qpid.server.model.AbstractConfiguredObject; |
| import org.apache.qpid.server.model.Broker; |
| import org.apache.qpid.server.model.ConfiguredObject; |
| import org.apache.qpid.server.model.IllegalStateTransitionException; |
| import org.apache.qpid.server.model.ManagedAttributeField; |
| import org.apache.qpid.server.model.State; |
| import org.apache.qpid.server.store.berkeleydb.replication.ReplicatedEnvironmentFacade; |
| import org.apache.qpid.server.util.ConnectionScopedRuntimeException; |
| import org.apache.qpid.server.util.ServerScopedRuntimeException; |
| |
| public class BDBHARemoteReplicationNodeImpl extends AbstractConfiguredObject<BDBHARemoteReplicationNodeImpl> implements BDBHARemoteReplicationNode<BDBHARemoteReplicationNodeImpl> |
| { |
| |
| private static final Logger LOGGER = LoggerFactory.getLogger(BDBHARemoteReplicationNodeImpl.class); |
| |
| private final ReplicatedEnvironmentFacade _replicatedEnvironmentFacade; |
| private final String _address; |
| private final Broker<?> _broker; |
| |
| private volatile Date _joinTime; |
| private volatile long _lastTransactionId; |
| |
| @ManagedAttributeField(afterSet="afterSetRole") |
| private volatile NodeRole _role; |
| |
| private final boolean _isMonitor; |
| private BDBHAVirtualHostNodeLogSubject _virtualHostNodeLogSubject; |
| private GroupLogSubject _groupLogSubject; |
| private volatile NodeRole _lastKnownRole; |
| private volatile boolean _nodeLeft = false; |
| |
| public BDBHARemoteReplicationNodeImpl(BDBHAVirtualHostNode<?> virtualHostNode, Map<String, Object> attributes, ReplicatedEnvironmentFacade replicatedEnvironmentFacade) |
| { |
| super(virtualHostNode, attributes); |
| _broker = (Broker<?>) virtualHostNode.getParent(); |
| _address = (String)attributes.get(ADDRESS); |
| _replicatedEnvironmentFacade = replicatedEnvironmentFacade; |
| setRole(NodeRole.UNREACHABLE); |
| _isMonitor = (Boolean)attributes.get(MONITOR); |
| } |
| |
| @Override |
| public String getGroupName() |
| { |
| return _replicatedEnvironmentFacade.getGroupName(); |
| } |
| |
| @Override |
| public String getAddress() |
| { |
| return _address; |
| } |
| |
| @Override |
| public NodeRole getRole() |
| { |
| return _lastKnownRole; |
| } |
| |
| @Override |
| public Date getJoinTime() |
| { |
| return _joinTime; |
| } |
| |
| @Override |
| public long getLastKnownReplicationTransactionId() |
| { |
| return _lastTransactionId; |
| } |
| |
| @Override |
| public boolean isMonitor() |
| { |
| return _isMonitor; |
| } |
| |
| @Override |
| public String toString() |
| { |
| return getClass().getSimpleName() + "[id=" + getId() + ", name=" + getName() + ", address=" + getAddress() |
| + ", state=" + getState() + ", role=" + getRole() + "]"; |
| } |
| |
| @Override |
| protected ListenableFuture<Void> onDelete() |
| { |
| if (!_nodeLeft) |
| { |
| SettableFuture<Void> future = SettableFuture.create(); |
| |
| String nodeName = getName(); |
| try |
| { |
| _replicatedEnvironmentFacade.removeNodeFromGroup(nodeName); |
| getEventLogger().message(_virtualHostNodeLogSubject, |
| HighAvailabilityMessages.DELETE(getName(), String.valueOf(Outcome.SUCCESS))); |
| future.set(null); |
| } |
| catch (RuntimeException e) |
| { |
| getEventLogger().message(_virtualHostNodeLogSubject, |
| HighAvailabilityMessages.DELETE(getName(), String.valueOf(Outcome.FAILURE))); |
| future.setException(e); |
| } |
| return future; |
| } |
| else |
| { |
| return super.onDelete(); |
| } |
| } |
| |
| @SuppressWarnings("unchecked") |
| protected void afterSetRole() |
| { |
| try |
| { |
| String nodeName = getName(); |
| getEventLogger().message(_groupLogSubject, HighAvailabilityMessages.TRANSFER_MASTER(getName(), getAddress())); |
| |
| _replicatedEnvironmentFacade.transferMasterAsynchronously(nodeName).get(MUTATE_JE_TIMEOUT_MS, TimeUnit.MILLISECONDS); |
| } |
| catch (TimeoutException e) |
| { |
| LOGGER.warn("Transfer master did not complete within " + MUTATE_JE_TIMEOUT_MS + "ms. Node may still be elected master at a later time."); |
| } |
| catch (InterruptedException e) |
| { |
| Thread.currentThread().interrupt(); |
| } |
| catch (ExecutionException e) |
| { |
| Throwable cause = e.getCause(); |
| |
| if (cause instanceof Error) |
| { |
| throw (Error) cause; |
| } |
| else if (cause instanceof ServerScopedRuntimeException) |
| { |
| throw (ServerScopedRuntimeException) cause; |
| } |
| else |
| { |
| throw new ConnectionScopedRuntimeException("Unexpected exception on master transfer: " + cause.getMessage(), cause); |
| } |
| } |
| } |
| |
| @Override |
| protected void validateChange(final ConfiguredObject<?> proxyForValidation, final Set<String> changedAttributes) |
| { |
| super.validateChange(proxyForValidation, changedAttributes); |
| if (changedAttributes.contains(ROLE)) |
| { |
| NodeRole currentRole = getRole(); |
| if (NodeRole.REPLICA != currentRole) |
| { |
| throw new IllegalArgumentException("Cannot transfer mastership when not in replica role." |
| + " Current role " + currentRole); |
| } |
| NodeRole newRole = (NodeRole) ((BDBHARemoteReplicationNode<?>) proxyForValidation).getAttribute(ROLE); |
| if (NodeRole.MASTER != newRole) |
| { |
| throw new IllegalArgumentException("Changing role to other value then " + NodeRole.MASTER + " is unsupported"); |
| } |
| } |
| |
| if (changedAttributes.contains(JOIN_TIME)) |
| { |
| throw new IllegalArgumentException("Cannot change derived attribute " + JOIN_TIME); |
| } |
| |
| if (changedAttributes.contains(LAST_KNOWN_REPLICATION_TRANSACTION_ID)) |
| { |
| throw new IllegalArgumentException("Cannot change derived attribute " + LAST_KNOWN_REPLICATION_TRANSACTION_ID); |
| } |
| } |
| |
| void setRole(NodeRole role) |
| { |
| _lastKnownRole = role; |
| _role = role; |
| updateModelStateFromRole(role); |
| } |
| |
| void setJoinTime(long joinTime) |
| { |
| _joinTime = new Date(joinTime); |
| } |
| |
| void setLastTransactionId(long lastTransactionId) |
| { |
| _lastTransactionId = lastTransactionId; |
| } |
| |
| private void updateModelStateFromRole(NodeRole role) |
| { |
| State currentState = getState(); |
| if (currentState == State.DELETED) |
| { |
| return; |
| } |
| |
| boolean isActive = NodeRole.MASTER == role || NodeRole.REPLICA == role; |
| setState(isActive ? State.ACTIVE : State.UNAVAILABLE); |
| } |
| |
| @Override |
| public void onValidate() |
| { |
| super.onValidate(); |
| _virtualHostNodeLogSubject = new BDBHAVirtualHostNodeLogSubject(getGroupName(), getName()); |
| _groupLogSubject = new GroupLogSubject(getGroupName()); |
| } |
| |
| private EventLogger getEventLogger() |
| { |
| return _broker.getEventLogger(); |
| } |
| |
| void setNodeLeft(final boolean nodeLeft) |
| { |
| _nodeLeft = nodeLeft; |
| } |
| |
| @Override |
| protected ListenableFuture<Void> deleteNoChecks() |
| { |
| return super.deleteNoChecks(); |
| } |
| } |