Come indicizzare un array di tipo annidato in Elasticsearch?

Question

Sto lavorando su ElasticSearch. Qui ho voluto indicizzare una serie di campi di tipo annidati attraverso un API JAVA. Qualcuno potrebbe dare un esempio su questo. Ho provato ancora pochi hanno fallito.

XContentBuilder xb1 = XContentFactory.jsonBuilder().startObject(); 
XContentBuilder xb2 = XContentFactory.jsonBuilder().startObject(); 

xb1.startArray("eventnested"); 
for(int j=0;j<2;j++) { 
    xb2.field("event_type",eventType); 
    xb2.field("event_attribute_instance",eventInstance); 
    xb2.startArray("attributes"); 
    for(int i=0;i<2;i++) { 
     XContentBuilder xb3 = XContentFactory.jsonBuilder().startObject(); 
     xb3.field("event_attribute_name", attrName); 
     xb3.field("event_attribute_value", attrValue); 
     xb2.value(xb3.copiedBytes()); 
    } 
    xb1.value(xb2.copiedBytes()); 
} 

Dopo l'indicizzazione dei dati, quando ho letto la risposta i dati del campo particolare sembravano

"eventnested.event_type": [ "eyJldmVudF90eXBlIjoiUXVvdGF0aW9uIiwiZXZlbnRfYXR0cmlidXRlX2luc3RhbmNlIjoiMSIsImF0dHJpYnV0ZXMiOlsiZXlKbGRtVnVkRjloZEhSeWFXSjFkR1ZmYm1GdFpTSTZJbkJsY25OdmJpQWlMQ0psZG1WdWRGOWhkSFJ5YVdKMWRHVmZkbUZzZFdVaU9pSkxZWGtnVFdGcmFIVmlaV3hoSW4wPSJdLCJhdHRyaWJ1dGVzIjpbImV5SmxkbVZ1ZEY5aGRIUnlhV0oxZEdWZmJtRnRaU0k2SW5GMWIzUmxJQ0lzSW1WMlpXNTBYMkYwZEhKcFluVjBaVjkyWVd4MVpTSTZJblJvWlNCaWIza2djbUZ3WldRZ2RHaGxJSEJoYVhJZ2IyNGdiblZ0WlhKdmRYTWdiMk5qWVhOcGIyNXpMQ0IzYVhSb0lIUm9aU0JzWVhSbGMzUWdhVzVqYVdSbG JuUWdZbVZwYm1jZ2IyNGdSbkpwWkdGNUluMD0iXX0 =", "eyJldmVudF90eXBlIjoiUXVvdGF0aW9uIiwiZXZlbnRfYXR0cmlidXRlX2luc3RhbmNlIjoiMSIsImF0dHJpYnV0ZXMiOlsiZXlKbGRtVnVkRjloZEhSeWFXSjFkR1ZmYm1GdFpTSTZJbkJsY25OdmJpQWlMQ0psZG1WdWRGOWhkSFJ5YVdKMWRHVmZkbUZzZFdVaU9pSkxZWGtnVFdGcmFIVmlaV3hoSW4wPSJdLCJhdHRyaWJ1dGVzIjpbImV5SmxkbVZ1ZEY5aGRIUnlhV0oxZEdWZmJtRnRaU0k2SW5GMWIzUmxJQ0lzSW1WMlpXNTBYMkYwZEhKcFluVjBaVjkyWVd4MVpTSTZJblJvWlNCMFpXVnVZV2RsY2lCb1lYTWdZbVZsYmlCd2JHRmpaV1FnYVc0Z1lTQnpZV1psZEhrZ2FHOXRaU0JoYm1RZ2QybHNiQ0JpWlNCamFHRnlaMlZrSUhkcGRHZ2djbUZ3WlNKOSJdfQ =="

Answer 1

XContentBuilder xb = XContentFactory.jsonBuilder().startObject(); 

xb.startArray("eventnested"); 
for(int j=0;j<2;j++) { 
    xb.startObject(); 
    xb.field("event_type", eventType); 
    xb.field("event_attribute_instance", eventInstance); 
    xb.startArray("attributes"); 
    for(int i=0;i<2;i++) { 
     xb.startObject(); 
     xb.field("event_attribute_name", attrName); 
     xb.field("event_attribute_value", attrValue); 
     xb.endObject(); 
    } 
    xb.endArray(); 
    xb.endObject(); 
} 
xb.endArray();