/*
* 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.connector.jmx;
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 static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkNotNull;
public class JmxSplitManager
implements ConnectorSplitManager
{
private final String connectorId;
private final NodeManager nodeManager;
@Inject
public JmxSplitManager(JmxConnectorId jmxConnectorId, NodeManager nodeManager)
{
this.connectorId = checkNotNull(jmxConnectorId, "jmxConnectorId is null").toString();
this.nodeManager = checkNotNull(nodeManager, "nodeManager is null");
}
@Override
public String getConnectorId()
{
return connectorId;
}
@Override
public boolean canHandle(TableHandle tableHandle)
{
return tableHandle instanceof JmxTableHandle && ((JmxTableHandle) tableHandle).getConnectorId().equals(connectorId);
}
@Override
public PartitionResult getPartitions(TableHandle table, TupleDomain tupleDomain)
{
checkNotNull(table, "table is null");
checkNotNull(tupleDomain, "tupleDomain is null");
checkArgument(table instanceof JmxTableHandle, "TableHandle must be an JmxTableHandle");
JmxTableHandle jmxTableHandle = (JmxTableHandle) table;
ImmutableList<Partition> partitions = ImmutableList.<Partition>of(new JmxPartition(jmxTableHandle));
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 JmxPartition, "Partition must be an jmx partition");
JmxPartition jmxPartition = (JmxPartition) partition;
ImmutableList.Builder<Split> splits = ImmutableList.builder();
for (Node node : nodeManager.getAllNodes().getActiveNodes()) {
splits.add(new JmxSplit(jmxPartition.tableHandle, ImmutableList.of(node.getHostAndPort())));
}
return new FixedSplitSource(connectorId, splits.build());
}
public static class JmxPartition
implements Partition
{
private final JmxTableHandle tableHandle;
public JmxPartition(JmxTableHandle tableHandle)
{
this.tableHandle = checkNotNull(tableHandle, "tableHandle is null");
}
public JmxTableHandle getTableHandle()
{
return tableHandle;
}
@Override
public String getPartitionId()
{
return "jmx";
}
@Override
public TupleDomain getTupleDomain()
{
return TupleDomain.all();
}
@Override
public String toString()
{
return Objects.toStringHelper(this)
.add("tableHandle", tableHandle)
.toString();
}
}
}