/*
* Licensed 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 com.facebook.presto.tpch;
import com.facebook.presto.metadata.Node;
import com.facebook.presto.metadata.NodeManager;
import com.facebook.presto.spi.ConnectorSplitManager;
import com.facebook.presto.spi.FixedSplitSource;
import com.facebook.presto.spi.Partition;
import com.facebook.presto.spi.PartitionResult;
import com.facebook.presto.spi.Split;
import com.facebook.presto.spi.SplitSource;
import com.facebook.presto.spi.TableHandle;
import com.facebook.presto.spi.TupleDomain;
import com.google.common.base.Objects;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Iterables;
import javax.inject.Inject;
import java.util.List;
import java.util.Set;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkNotNull;
public class TpchSplitManager
implements ConnectorSplitManager
{
private final String connectorId;
private final NodeManager nodeManager;
@Inject
public TpchSplitManager(String connectorId, NodeManager nodeManager)
{
this.connectorId = connectorId;
this.nodeManager = nodeManager;
}
@Override
public String getConnectorId()
{
return connectorId;
}
@Override
public boolean canHandle(TableHandle handle)
{
return handle instanceof TpchTableHandle;
}
@Override
public PartitionResult getPartitions(TableHandle table, TupleDomain tupleDomain)
{
ImmutableList<Partition> partitions = ImmutableList.<Partition>of(new TpchPartition((TpchTableHandle) table));
return new PartitionResult(partitions, tupleDomain);
}
@Override
public SplitSource getPartitionSplits(TableHandle table, List<Partition> partitions)
{
checkNotNull(partitions, "partitions is null");
if (partitions.isEmpty()) {
return new FixedSplitSource(connectorId, ImmutableList.<Split>of());
}
Partition partition = Iterables.getOnlyElement(partitions);
checkArgument(partition instanceof TpchPartition, "Partition must be a tpch partition");
TpchTableHandle tableHandle = ((TpchPartition) partition).getTable();
Set<Node> nodes = nodeManager.getAllNodes().getActiveNodes();
int totalParts = nodes.size();
int partNumber = 0;
// Split the data using split and skew by the number of nodes available.
ImmutableList.Builder<Split> splits = ImmutableList.builder();
for (Node node : nodes) {
TpchSplit tpchSplit = new TpchSplit(tableHandle, partNumber++, totalParts, ImmutableList.of(node.getHostAndPort()));
splits.add(tpchSplit);
}
return new FixedSplitSource(connectorId, splits.build());
}
public static class TpchPartition
implements Partition
{
private final TpchTableHandle table;
public TpchPartition(TpchTableHandle table)
{
this.table = checkNotNull(table, "table is null");
}
public TpchTableHandle getTable()
{
return table;
}
@Override
public String getPartitionId()
{
return table.getTableName();
}
@Override
public TupleDomain getTupleDomain()
{
return TupleDomain.all();
}
@Override
public String toString()
{
return Objects.toStringHelper(this)
.add("table", table)
.toString();
}
}
}