Elasticsearch Bulk API

Elasticsearch Bulk API允许批量提交index和delete请求。

BulkRequestBuilder bulkRequest = client.prepareBulk();
bulkRequest.add(client.prepareIndex("index1", "type1", "id1").setSource(source);
bulkRequest.add(client.prepareIndex("index2", "type2", "id2").setSource(source);
BulkResponse bulkResponse = bulkRequest.execute().actionGet();

但有时我们需要更精细的批量操控，比如

BulkProcessor bulkProcessor = BulkProcessor.builder(
        client,  
        new BulkProcessor.Listener() {
            @Override
            public void beforeBulk(long executionId,
                                   BulkRequest request) { ... } 

            @Override
            public void afterBulk(long executionId,
                                  BulkRequest request,
                                  BulkResponse response) { ... } 

            @Override
            public void afterBulk(long executionId,
                                  BulkRequest request,
                                  Throwable failure) { ... } 
        })
        .setBulkActions(10000) 
        .setBulkSize(new ByteSizeValue(1, ByteSizeUnit.GB)) 
        .setFlushInterval(TimeValue.timeValueSeconds(5)) 
        .build();
bulkProcessor.add(new IndexRequest("index1", "type1", "id1").source(source1));
bulkProcessor.add(new DeleteRequest("index2", "type2", "id2");

1. beforeBulk会在批量提交之前执行，可以从BulkRequest中获取请求信息request.requests()或者请求数量request.numberOfActions()。

2. 第一个afterBulk会在批量成功后执行，可以跟beforeBulk配合计算批量所需时间

3. 第二个afterBulk会在批量失败后执行

4. 在例子中，当请求超过10000个（default=1000）或者总大小超过1GB（default=5MB）时，触发批量提交动作。另外每隔5秒也会提交一次（默认不会根据时间间隔提交）。