我正在尝试使用新的elasticsearch连接器将数据集中的一些数据发送到elasticsearch中,但是除了这里用于数据流结构的资源,我找不到其他资源:
https://ci.apache.org/projects/flink/flink-docs-stable/dev/connectors/elasticsearch.html
我的数据集是行的数据集(来自sql查询),这是内容:
199947,6
199958,3
199964,2
199985,2
我创建了一个静态嵌套类,该类实现了 ElasticsearchSinkFunction :
public static class NumberOfTransactionsByBlocks implements ElasticsearchSinkFunction<Row> {
public void process(Row element, RuntimeContext ctx, RequestIndexer indexer) {
indexer.add(createIndexRequest(element));
}
public IndexRequest createIndexRequest(Row element) {
Map<String, String> json = new HashMap<>();
json.put("block_number", element.getField(0).toString());
json.put("numberOfTransactions", element.getField(1).toString());
return Requests.indexRequest()
.index("nbOfTransactionsByBlocks")
.type("count-transactions")
.source(json);
}
}
然后我的问题是我不知道如何发送内部类的实例...
DataSet<Row> data = tableEnv.toDataSet(sqlResult, Row.class);
List<HttpHost> httpHosts = new ArrayList<>();
httpHosts.add(new HttpHost("127.0.0.1", 9200, "http"));
httpHosts.add(new HttpHost("10.2.3.1", 9200, "http"));
Map<String, String> config = new HashMap<>();
config.put("bulk.flush.max.actions", "1"); // flush inserts after every event
config.put("cluster.name", "elasticsearch"); // default cluster name
data.output(new ElasticsearchSink<>(config, httpHosts, new NumberOfTransactionsByBlocks()));
实例化ElasticsearchSink时显示错误:
无法推断参数
但是当我指定类型(行)时,它说:
ElasticsearchSink(java.util.Map, java.util.List, org.apache.flink.streaming.connectors.elasticsearch.ElasticsearchSinkFunction, org.apache.flink.streaming.connectors.elasticsearch.ActionRequestFailureHandler, org.apache.flink.streaming.connectors.elasticsearch6.RestClientFactory)” 拥有私人访问权限 'org.apache.flink.streaming.connectors.elasticsearch6.ElasticsearchSink'
我做错什么了吗?
答案 0 :(得分:0)
Flink当前为ElasticSearch提供了(1.6.0)个four different连接器。
set lcs=tab:>-,trail:·,nbsp:·,extends:>,precedes:<
flink-connector-elasticsearch_2.11
flink-connector-elasticsearch2_2.11
flink-connector-elasticsearch5_2.11
确保在项目中包含正确的maven依赖项。
...在
中具有私人访问权限flink-connector-elasticsearch6_2.11
org.apache.flink.streaming.connectors.
elasticsearch6
现在,从您共享的跟踪中猜测,您似乎正在使用.ElasticsearchSink
的依赖项。查看source,这表明他们已将构造函数移至v6.x
并添加了Builder
[commit]
因此,要添加ElasticsearchSink
,您需要使用类似的东西:
private
此外,导入将
data.output(
new ElasticsearchSink.Builder<>(httpHosts, new NumberOfTransactionsByBlocks())
.setBulkFlushMaxActions(1)
.build());