/*
* 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.cassandra.repair;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.cassandra.net.MessagingService;
import org.apache.cassandra.repair.messages.SyncComplete;
import org.apache.cassandra.repair.messages.SyncRequest;
import org.apache.cassandra.service.ActiveRepairService;
import org.apache.cassandra.streaming.*;
import org.apache.cassandra.utils.FBUtilities;
/**
* Task that make two nodes exchange (stream) some ranges (for a given table/cf).
* This handle the case where the local node is neither of the two nodes that
* must stream their range, and allow to register a callback to be called on
* completion.
*/
public class StreamingRepairTask implements Runnable, StreamEventHandler
{
private static final Logger logger = LoggerFactory.getLogger(StreamingRepairTask.class);
/** Repair session ID that this streaming task belongs */
public final RepairJobDesc desc;
public final SyncRequest request;
public StreamingRepairTask(RepairJobDesc desc, SyncRequest request)
{
this.desc = desc;
this.request = request;
}
/**
* Returns true if the task if the task can be executed locally, false if
* it has to be forwarded.
*/
public boolean isLocalTask()
{
return request.initiator.equals(request.src);
}
public void run()
{
if (request.src.equals(FBUtilities.getBroadcastAddress()))
initiateStreaming();
else
forwardToSource();
}
private void initiateStreaming()
{
long repairedAt = ActiveRepairService.UNREPAIRED_SSTABLE;
if (desc.parentSessionId != null && ActiveRepairService.instance.getParentRepairSession(desc.parentSessionId) != null)
repairedAt = ActiveRepairService.instance.getParentRepairSession(desc.parentSessionId).repairedAt;
logger.info(String.format("[streaming task #%s] Performing streaming repair of %d ranges with %s", desc.sessionId, request.ranges.size(), request.dst));
StreamResultFuture op = new StreamPlan("Repair", repairedAt)
.flushBeforeTransfer(true)
// request ranges from the remote node
.requestRanges(request.dst, desc.keyspace, request.ranges, desc.columnFamily)
// send ranges to the remote node
.transferRanges(request.dst, desc.keyspace, request.ranges, desc.columnFamily)
.execute();
op.addEventListener(this);
}
private void forwardToSource()
{
logger.info(String.format("[repair #%s] Forwarding streaming repair of %d ranges to %s (to be streamed with %s)", desc.sessionId, request.ranges.size(), request.src, request.dst));
MessagingService.instance().sendOneWay(request.createMessage(), request.src);
}
public void handleStreamEvent(StreamEvent event)
{
// Nothing to do here, all we care about is the final success or failure and that's handled by
// onSuccess and onFailure
}
/**
* If we succeeded on both stream in and out, reply back to the initiator.
*/
public void onSuccess(StreamState state)
{
logger.info(String.format("[repair #%s] streaming task succeed, returning response to %s", desc.sessionId, request.initiator));
MessagingService.instance().sendOneWay(new SyncComplete(desc, request.src, request.dst, true).createMessage(), request.initiator);
}
/**
* If we failed on either stream in or out, reply fail to the initiator.
*/
public void onFailure(Throwable t)
{
MessagingService.instance().sendOneWay(new SyncComplete(desc, request.src, request.dst, false).createMessage(), request.initiator);
}
}