flink 1.12 kafka 写elasticsearch
时间: 2023-11-08 08:29:40 浏览: 179
如果您想使用Flink 1.12将Kafka数据写入Elasticsearch中,可以按照以下步骤操作:
1. 首先,您需要在项目中添加Flink的Kafka和Elasticsearch依赖,例如:
```xml
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-connector-kafka_2.11</artifactId>
<version>1.12.0</version>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-connector-elasticsearch7_2.11</artifactId>
<version>1.12.0</version>
</dependency>
```
2. 创建一个Flink Streaming Job,并使用Kafka作为数据源,例如:
```java
Properties props = new Properties();
props.setProperty("bootstrap.servers", "localhost:9092");
props.setProperty("group.id", "test");
DataStream<String> stream = env.addSource(new FlinkKafkaConsumer<>("my-topic", new SimpleStringSchema(), props));
```
3. 将数据转换为Elasticsearch的数据格式,并将其写入Elasticsearch中,例如:
```java
List<HttpHost> httpHosts = new ArrayList<>();
httpHosts.add(new HttpHost("localhost", 9200, "http"));
stream.map(new MapFunction<String, Map<String, Object>>() {
@Override
public Map<String, Object> map(String value) throws Exception {
// 将数据转换为Elasticsearch的数据格式
Map<String, Object> data = new HashMap<>();
data.put("message", value);
data.put("@timestamp", new Date());
return data;
}
}).addSink(new ElasticsearchSink.Builder<>(httpHosts, new ElasticsearchSinkFunction<Map<String, Object>>() {
@Override
public void process(Map<String, Object> element, RuntimeContext ctx, RequestIndexer indexer) {
// 将数据写入Elasticsearch中
IndexRequest request = Requests.indexRequest()
.index("my-index")
.source(element);
indexer.add(request);
}
}).build());
```
上述代码中,我们将Kafka中的数据转换为Elasticsearch的数据格式,然后使用ElasticsearchSinkFunction将数据写入Elasticsearch中。
希望这些能够帮到您!
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