blob: 6ab826fc41a4347d4289b9f79af55c15ebdd9e2e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
/*
* 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.drill.exec.store.kafka.schema;
import java.util.Map;
import java.util.Set;
import org.apache.calcite.schema.SchemaPlus;
import org.apache.calcite.schema.Table;
import org.apache.drill.common.exceptions.UserException;
import org.apache.drill.exec.planner.logical.DrillTable;
import org.apache.drill.exec.planner.logical.DynamicDrillTable;
import org.apache.drill.exec.store.AbstractSchema;
import org.apache.drill.exec.store.kafka.KafkaScanSpec;
import org.apache.drill.exec.store.kafka.KafkaStoragePlugin;
import org.apache.drill.exec.store.kafka.KafkaStoragePluginConfig;
import org.apache.kafka.clients.consumer.KafkaConsumer;
import org.apache.kafka.common.KafkaException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.drill.shaded.guava.com.google.common.collect.ImmutableList;
import org.apache.drill.shaded.guava.com.google.common.collect.Maps;
public class KafkaMessageSchema extends AbstractSchema {
private static final Logger logger = LoggerFactory.getLogger(KafkaMessageSchema.class);
private final KafkaStoragePlugin plugin;
private final Map<String, DrillTable> drillTables = Maps.newHashMap();
private Set<String> tableNames;
public KafkaMessageSchema(final KafkaStoragePlugin plugin, final String name) {
super(ImmutableList.<String> of(), name);
this.plugin = plugin;
}
@Override
public String getTypeName() {
return KafkaStoragePluginConfig.NAME;
}
void setHolder(SchemaPlus plusOfThis) {
for (String s : getSubSchemaNames()) {
plusOfThis.add(s, getSubSchema(s));
}
}
@Override
public Table getTable(String tableName) {
if (!drillTables.containsKey(tableName)) {
KafkaScanSpec scanSpec = new KafkaScanSpec(tableName);
DrillTable table = new DynamicDrillTable(plugin, getName(), scanSpec);
drillTables.put(tableName, table);
}
return drillTables.get(tableName);
}
@Override
public Set<String> getTableNames() {
if (tableNames == null) {
try (KafkaConsumer<?, ?> kafkaConsumer = new KafkaConsumer<>(plugin.getConfig().getKafkaConsumerProps())) {
tableNames = kafkaConsumer.listTopics().keySet();
} catch(KafkaException e) {
throw UserException.dataReadError(e).message("Failed to get tables information").addContext(e.getMessage())
.build(logger);
}
}
return tableNames;
}
}
|
