Thrift
To use this Apache Druid extension, include druid-thrift-extensions
in the extensions load list.
This extension enables Druid to ingest thrift compact data online (ByteBuffer
) and offline (SequenceFile of type <Writable, BytesWritable>
or LzoThriftBlock File).
You may want to use another version of thrift, change the dependency in pom and compile yourself.
LZO Support
If you plan to read LZO-compressed Thrift files, you will need to download version 0.4.19 of the hadoop-lzo JAR and place it in your extensions/druid-thrift-extensions
directory.
Thrift Parser
Field | Type | Description | Required |
---|---|---|---|
type | String | This should say thrift | yes |
parseSpec | JSON Object | Specifies the timestamp and dimensions of the data. Should be a JSON parseSpec. | yes |
thriftJar | String | path of thrift jar, if not provided, it will try to find the thrift class in classpath. Thrift jar in batch ingestion should be uploaded to HDFS first and configure jobProperties with "tmpjars":"/path/to/your/thrift.jar" | no |
thriftClass | String | classname of thrift | yes |
- Batch Ingestion example -
inputFormat
andtmpjars
should be set.
This is for batch ingestion using the HadoopDruidIndexer. The inputFormat of inputSpec in ioConfig could be one of "org.apache.hadoop.mapreduce.lib.input.SequenceFileInputFormat"
and com.twitter.elephantbird.mapreduce.input.LzoThriftBlockInputFormat
. Be careful, when LzoThriftBlockInputFormat
is used, thrift class must be provided twice.
{
"type": "index_hadoop",
"spec": {
"dataSchema": {
"dataSource": "book",
"parser": {
"type": "thrift",
"jarPath": "book.jar",
"thriftClass": "org.apache.druid.data.input.thrift.Book",
"protocol": "compact",
"parseSpec": {
"format": "json",
...
}
},
"metricsSpec": [],
"granularitySpec": {}
},
"ioConfig": {
"type": "hadoop",
"inputSpec": {
"type": "static",
"inputFormat": "org.apache.hadoop.mapreduce.lib.input.SequenceFileInputFormat",
// "inputFormat": "com.twitter.elephantbird.mapreduce.input.LzoThriftBlockInputFormat",
"paths": "/user/to/some/book.seq"
}
},
"tuningConfig": {
"type": "hadoop",
"jobProperties": {
"tmpjars":"/user/h_user_profile/du00/druid/test/book.jar",
// "elephantbird.class.for.MultiInputFormat" : "${YOUR_THRIFT_CLASS_NAME}"
}
}
}
}