Enrich processor configuration changes (#45466)

Enrich processor configuration changes:
* Renamed `enrich_key` option to `field` option.
* Replaced `set_from` and `targets` options with `target_field`.

The `target_field` option behaves different to how `set_from` and
`targets` worked. The `target_field` is the field that will contain
the looked up document.

Relates to #32789

docs/reference/ingest/ingest-node.asciidoc

@@ -907,8 +907,8 @@ PUT _ingest/pipeline/user_lookup
     {
       "enrich" : {
         "policy_name": "users-policy",
-        "enrich_key" : "email",
-        "targets": ["address", "city", "zip", "state"]
+        "field" : "email",
+        "target_field": "user"
       }
     }
   ]
@@ -937,10 +937,15 @@ Which returns:
   "_seq_no": 55,
   "_primary_term": 1,
   "_source": {
-    "zip": 70116,
-    "address": "6649 N Blue Gum St",
-    "city": "New Orleans",
-    "state": "LA",
+    "user": {
+      "email": "mardy.brown@email.me",
+      "first_name": "Mardy",
+      "last_name": "Brown",
+      "zip": 70116,
+      "address": "6649 N Blue Gum St",
+      "city": "New Orleans",
+      "state": "LA"
+    },
     "email": "mardy.brown@email.me"
   }
 }

docs/reference/ingest/processors/enrich.asciidoc

@@ -6,96 +6,16 @@
 The `enrich` processor can enrich documents with data from another index.
 See <<ingest-enriching-data,enrich data>> section for more information how to set this up and
 check out the <<enrich-processor-getting-started,getting started>> to get familiar with enrich policies and related APIs.
-a
+
 [[enrich-options]]
 .Enrich Options
 [options="header"]
 |======
 | Name               | Required  | Default              | Description
 | `policy_name`      | yes       | -                    | The name of the enrich policy to use.
-| `enrich_key`       | no        | Policy enrich_key    | The field to get the value from for the enrich lookup.
-| `ignore_missing`   | no        | `false`              | If `true` and `enrich_key` does not exist, the processor quietly exits without modifying the document
+| `field`            | yes       | -                    | The field in the input document that matches the policies match_field used to retrieve the enrichment data.
+| `target_field`     | yes       | -                    | The field that will be used for the enrichment data.
+| `ignore_missing`   | no        | false                | If `true` and `field` does not exist, the processor quietly exits without modifying the document
 | `override`         | no        | true                 | If processor will update fields with pre-existing non-null-valued field. When set to `false`, such fields will not be touched.
-| `targets`          | no 1)     | -                    | Describes what fields should be added to the document being indexed from the lookup document
-| `set_from`         | no 1)     | -                    | Same as `targets`, but allows fields from the lookup document to added under a different name to the document being indexed
 include::common-options.asciidoc[]
 |======
-
-1) Either `targets` or `set_from` must be specified.
-
-[[enrich-processor-set-from]]
-==== Enrich `set_from` option
-
-This option should be used in the case that the field in the looked up document should be placed under
-a different field in the document being ingested.
-
-The `set_from` accepts an array with two fields:
-* `source` - The name of the field in the lookup document
-* `target` - The name of the field in the document being ingested that should hold the source field's value.
-
-For example:
-
-//////////////////////////
-
-[source,js]
---------------------------------------------------
-PUT /_enrich/policy/users-policy
-{
-    "type": "exact_match",
-    "indices": "users",
-    "match_field": "email",
-    "enrich_fields": ["first_name", "last_name", "address", "city", "zip", "state"]
-}
---------------------------------------------------
-// CONSOLE
-// TEST
-
-//////////////////////////
-
-[source,js]
---------------------------------------------------
-PUT _ingest/pipeline/user_lookup
-{
-  "description" : "Enriching user details to messages",
-  "processors" : [
-    {
-      "enrich" : {
-        "policy_name": "users-policy",
-        "enrich_key" : "email",
-        "set_from": [
-            {
-                "source": "address",
-                "target": "address-line-1"
-            },
-            {
-                "source": "city",
-                "target": "residence"
-            },
-            {
-                "source": "zip",
-                "target": "zipcode"
-            },
-            {
-                "source": "state",
-                "target": "us_state"
-            }
-        ]
-      }
-    }
-  ]
-}
---------------------------------------------------
-// CONSOLE
-// TEST[continued]
-
-//////////////////////////
-
-[source,js]
---------------------------------------------------
-DELETE /_ingest/pipeline/user_lookup
-DELETE /_enrich/policy/users-policy
---------------------------------------------------
-// CONSOLE
-// TEST[continued]
-
-//////////////////////////

x-pack/plugin/enrich/qa/common/src/main/java/org/elasticsearch/test/enrich/CommonEnrichRestTestCase.java

@@ -54,10 +54,7 @@ public abstract class CommonEnrichRestTestCase extends ESRestTestCase {
         // Create pipeline
         Request putPipelineRequest = new Request("PUT", "/_ingest/pipeline/my_pipeline");
         putPipelineRequest.setJsonEntity("{\"processors\":[" +
-            "{\"enrich\":{\"policy_name\":\"my_policy\",\"enrich_key\":\"host\",\"set_from\":[" +
-            "{\"source\":\"globalRank\",\"target\":\"global_rank\"}," +
-            "{\"source\":\"tldRank\",\"target\":\"tld_rank\"}" +
-            "]}}" +
+            "{\"enrich\":{\"policy_name\":\"my_policy\",\"field\":\"host\",\"target_field\":\"entry\"}}" +
             "]}");
         assertOK(client().performRequest(putPipelineRequest));
 
@@ -70,11 +67,12 @@ public abstract class CommonEnrichRestTestCase extends ESRestTestCase {
         // Check if document has been enriched
         Request getRequest = new Request("GET", "/my-index/_doc/1");
         Map<String, Object> response = toMap(client().performRequest(getRequest));
-        Map<?, ?> _source = (Map<?, ?>) response.get("_source");
-        assertThat(_source.size(), equalTo(3));
+        Map<?, ?> _source = (Map<?, ?>) ((Map<?, ?>) response.get("_source")).get("entry");
+        assertThat(_source.size(), equalTo(4));
         assertThat(_source.get("host"), equalTo("elastic.co"));
-        assertThat(_source.get("global_rank"), equalTo(25));
-        assertThat(_source.get("tld_rank"), equalTo(7));
+        assertThat(_source.get("tld"), equalTo("co"));
+        assertThat(_source.get("globalRank"), equalTo(25));
+        assertThat(_source.get("tldRank"), equalTo(7));
 
         if (deletePipeilne) {
             // delete the pipeline so the policies can be deleted
@@ -113,10 +111,7 @@ public abstract class CommonEnrichRestTestCase extends ESRestTestCase {
 
         Request putPipelineRequest = new Request("PUT", "/_ingest/pipeline/another_pipeline");
         putPipelineRequest.setJsonEntity("{\"processors\":[" +
-            "{\"enrich\":{\"policy_name\":\"my_policy\",\"enrich_key\":\"host\",\"set_from\":[" +
-            "{\"source\":\"globalRank\",\"target\":\"global_rank\"}," +
-            "{\"source\":\"tldRank\",\"target\":\"tld_rank\"}" +
-            "]}}" +
+            "{\"enrich\":{\"policy_name\":\"my_policy\",\"field\":\"host\",\"target_field\":\"entry\"}}" +
             "]}");
         assertOK(client().performRequest(putPipelineRequest));
 

x-pack/plugin/enrich/src/main/java/org/elasticsearch/xpack/enrich/EnrichProcessorFactory.java

@@ -11,10 +11,8 @@ import org.elasticsearch.ingest.ConfigurationUtils;
 import org.elasticsearch.ingest.Processor;
 import org.elasticsearch.xpack.core.enrich.EnrichPolicy;
 
-import java.util.List;
 import java.util.Map;
 import java.util.function.Consumer;
-import java.util.stream.Collectors;
 
 final class EnrichProcessorFactory implements Processor.Factory, Consumer<ClusterState> {
 
@@ -34,42 +32,15 @@ final class EnrichProcessorFactory implements Processor.Factory, Consumer<Cluste
             throw new IllegalArgumentException("policy [" + policyName + "] does not exists");
         }
 
-        String enrichKey = ConfigurationUtils.readStringProperty(TYPE, tag, config, "enrich_key", policy.getMatchField());
+        String field = ConfigurationUtils.readStringProperty(TYPE, tag, config, "field");
         boolean ignoreMissing = ConfigurationUtils.readBooleanProperty(TYPE, tag, config, "ignore_missing", false);
         boolean overrideEnabled = ConfigurationUtils.readBooleanProperty(TYPE, tag, config, "override", true);
-
-        final List<EnrichSpecification> specifications;
-        final List<Map<?, ?>> setFromConfig = ConfigurationUtils.readOptionalList(TYPE, tag, config, "set_from");
-        if (setFromConfig != null) {
-            if (setFromConfig.isEmpty()) {
-                throw new IllegalArgumentException("provided set_from is empty");
-            }
-
-            // TODO: Add templating support in enrich_values source and target options
-            specifications = setFromConfig.stream()
-                .map(entry -> new EnrichSpecification((String) entry.get("source"), (String) entry.get("target")))
-                .collect(Collectors.toList());
-        } else {
-            final List<String> targetsConfig = ConfigurationUtils.readList(TYPE, tag, config, "targets");
-            if (targetsConfig.isEmpty()) {
-                throw new IllegalArgumentException("provided targets is empty");
-            }
-
-            specifications = targetsConfig.stream()
-                .map(value -> new EnrichSpecification(value, value))
-                .collect(Collectors.toList());
-        }
-
-        for (EnrichSpecification specification : specifications) {
-            if (policy.getEnrichFields().contains(specification.sourceField) == false) {
-                throw new IllegalArgumentException("source field [" + specification.sourceField + "] does not exist in policy [" +
-                    policyName + "]");
-            }
-        }
+        String targetField = ConfigurationUtils.readStringProperty(TYPE, tag, config, "target_field");;
 
         switch (policy.getType()) {
             case EnrichPolicy.EXACT_MATCH_TYPE:
-                return new ExactMatchProcessor(tag, client, policyName, enrichKey, ignoreMissing, overrideEnabled, specifications);
+                return new ExactMatchProcessor(tag, client, policyName, field, targetField, policy.getMatchField(),
+                    ignoreMissing, overrideEnabled);
             default:
                 throw new IllegalArgumentException("unsupported policy type [" + policy.getType() + "]");
         }
@@ -88,15 +59,4 @@ final class EnrichProcessorFactory implements Processor.Factory, Consumer<Cluste
         policies = enrichMetadata.getPolicies();
     }
 
-    static final class EnrichSpecification {
-
-        final String sourceField;
-        final String targetField;
-
-        EnrichSpecification(String sourceField, String targetField) {
-            this.sourceField = sourceField;
-            this.targetField = targetField;
-        }
-    }
-
 }

x-pack/plugin/enrich/src/main/java/org/elasticsearch/xpack/enrich/ExactMatchProcessor.java

@@ -16,10 +16,8 @@ import org.elasticsearch.ingest.IngestDocument;
 import org.elasticsearch.search.SearchHit;
 import org.elasticsearch.search.builder.SearchSourceBuilder;
 import org.elasticsearch.xpack.core.enrich.EnrichPolicy;
-import org.elasticsearch.xpack.enrich.EnrichProcessorFactory.EnrichSpecification;
 import org.elasticsearch.xpack.enrich.action.EnrichCoordinatorProxyAction;
 
-import java.util.List;
 import java.util.Map;
 import java.util.function.BiConsumer;
 
@@ -28,61 +26,65 @@ public final class ExactMatchProcessor extends AbstractEnrichProcessor {
     static final String ENRICH_KEY_FIELD_NAME = "enrich_key_field";
 
     private final BiConsumer<SearchRequest, BiConsumer<SearchResponse, Exception>> searchRunner;
-    private final String enrichKey;
+    private final String field;
+    private final String targetField;
+    private final String matchField;
     private final boolean ignoreMissing;
     private final boolean overrideEnabled;
-    private final List<EnrichSpecification> specifications;
 
     ExactMatchProcessor(String tag,
                         Client client,
                         String policyName,
-                        String enrichKey,
+                        String field,
+                        String targetField,
+                        String matchField,
                         boolean ignoreMissing,
-                        boolean overrideEnabled,
-                        List<EnrichSpecification> specifications) {
+                        boolean overrideEnabled) {
         this(
             tag,
             createSearchRunner(client),
             policyName,
-            enrichKey,
-            ignoreMissing,
-            overrideEnabled,
-            specifications
+            field,
+            targetField,
+            matchField, ignoreMissing,
+            overrideEnabled
         );
     }
 
     ExactMatchProcessor(String tag,
                         BiConsumer<SearchRequest, BiConsumer<SearchResponse, Exception>> searchRunner,
                         String policyName,
-                        String enrichKey,
+                        String field,
+                        String targetField,
+                        String matchField,
                         boolean ignoreMissing,
-                        boolean overrideEnabled,
-                        List<EnrichSpecification> specifications) {
+                        boolean overrideEnabled) {
         super(tag, policyName);
         this.searchRunner = searchRunner;
-        this.enrichKey = enrichKey;
+        this.field = field;
+        this.targetField = targetField;
+        this.matchField = matchField;
         this.ignoreMissing = ignoreMissing;
         this.overrideEnabled = overrideEnabled;
-        this.specifications = specifications;
     }
 
     @Override
     public void execute(IngestDocument ingestDocument, BiConsumer<IngestDocument, Exception> handler) {
         try {
             // If a document does not have the enrich key, return the unchanged document
-            final String value = ingestDocument.getFieldValue(enrichKey, String.class, ignoreMissing);
+            final String value = ingestDocument.getFieldValue(field, String.class, ignoreMissing);
             if (value == null) {
                 handler.accept(ingestDocument, null);
                 return;
             }
 
-            TermQueryBuilder termQuery = new TermQueryBuilder(enrichKey, value);
+            TermQueryBuilder termQuery = new TermQueryBuilder(matchField, value);
             ConstantScoreQueryBuilder constantScore = new ConstantScoreQueryBuilder(termQuery);
             SearchSourceBuilder searchBuilder = new SearchSourceBuilder();
             searchBuilder.from(0);
             searchBuilder.size(1);
             searchBuilder.trackScores(false);
-            searchBuilder.fetchSource(specifications.stream().map(s -> s.sourceField).toArray(String[]::new), null);
+            searchBuilder.fetchSource(true);
             searchBuilder.query(constantScore);
 
             SearchRequest req = new SearchRequest();
@@ -104,18 +106,15 @@ public final class ExactMatchProcessor extends AbstractEnrichProcessor {
                     handler.accept(ingestDocument, null);
                     return;
                 } else if (searchHits.length > 1) {
-                    handler.accept(null, new IllegalStateException("more than one doc id matching for [" + enrichKey + "]"));
+                    handler.accept(null, new IllegalStateException("more than one doc id matching for [" + matchField + "]"));
                     return;
                 }
 
                 // If a document is returned, add its fields to the document
                 Map<String, Object> enrichDocument = searchHits[0].getSourceAsMap();
-                assert enrichDocument != null : "enrich document for id [" + enrichKey + "] was empty despite non-zero search hits length";
-                for (EnrichSpecification specification : specifications) {
-                    Object enrichFieldValue = enrichDocument.get(specification.sourceField);
-                    if (overrideEnabled || ingestDocument.hasField(specification.targetField) == false) {
-                        ingestDocument.setFieldValue(specification.targetField, enrichFieldValue);
-                    }
+                assert enrichDocument != null : "enrich document for id [" + field + "] was empty despite non-zero search hits length";
+                if (overrideEnabled || ingestDocument.hasField(targetField) == false) {
+                    ingestDocument.setFieldValue(targetField, enrichDocument);
                 }
                 handler.accept(ingestDocument, null);
             });
@@ -134,8 +133,16 @@ public final class ExactMatchProcessor extends AbstractEnrichProcessor {
         return EnrichProcessorFactory.TYPE;
     }
 
-    String getEnrichKey() {
-        return enrichKey;
+    String getField() {
+        return field;
+    }
+
+    public String getTargetField() {
+        return targetField;
+    }
+
+    public String getMatchField() {
+        return matchField;
     }
 
     boolean isIgnoreMissing() {
@@ -146,10 +153,6 @@ public final class ExactMatchProcessor extends AbstractEnrichProcessor {
         return overrideEnabled;
     }
 
-    List<EnrichSpecification> getSpecifications() {
-        return specifications;
-    }
-
     private static BiConsumer<SearchRequest, BiConsumer<SearchResponse, Exception>> createSearchRunner(Client client) {
         return (req, handler) -> {
             client.execute(EnrichCoordinatorProxyAction.INSTANCE, req, ActionListener.wrap(

x-pack/plugin/enrich/src/main/java/org/elasticsearch/xpack/enrich/action/EnrichShardMultiSearchAction.java

@@ -245,6 +245,10 @@ public class EnrichShardMultiSearchAction extends ActionType<MultiSearchResponse
     }
 
     private static BytesReference filterSource(FetchSourceContext fetchSourceContext, BytesReference source) throws IOException {
+        if (fetchSourceContext.includes().length == 0 && fetchSourceContext.excludes().length == 0) {
+            return source;
+        }
+
         Set<String> includes = Set.of(fetchSourceContext.includes());
         Set<String> excludes = Set.of(fetchSourceContext.excludes());
 

x-pack/plugin/enrich/src/test/java/org/elasticsearch/xpack/enrich/BasicEnrichTests.java

@@ -29,10 +29,11 @@ import java.util.Map;
 import java.util.Set;
 
 import static org.elasticsearch.xpack.enrich.EnrichMultiNodeIT.DECORATE_FIELDS;
-import static org.elasticsearch.xpack.enrich.EnrichMultiNodeIT.KEY_FIELD;
+import static org.elasticsearch.xpack.enrich.EnrichMultiNodeIT.MATCH_FIELD;
 import static org.elasticsearch.xpack.enrich.EnrichMultiNodeIT.SOURCE_INDEX_NAME;
 import static org.hamcrest.Matchers.equalTo;
 import static org.hamcrest.Matchers.is;
+import static org.hamcrest.Matchers.notNullValue;
 
 public class BasicEnrichTests extends ESSingleNodeTestCase {
 
@@ -47,17 +48,14 @@ public class BasicEnrichTests extends ESSingleNodeTestCase {
 
         String policyName = "my-policy";
         EnrichPolicy enrichPolicy =
-            new EnrichPolicy(EnrichPolicy.EXACT_MATCH_TYPE, null, List.of(SOURCE_INDEX_NAME), KEY_FIELD, List.of(DECORATE_FIELDS));
+            new EnrichPolicy(EnrichPolicy.EXACT_MATCH_TYPE, null, List.of(SOURCE_INDEX_NAME), MATCH_FIELD, List.of(DECORATE_FIELDS));
         PutEnrichPolicyAction.Request request = new PutEnrichPolicyAction.Request(policyName, enrichPolicy);
         client().execute(PutEnrichPolicyAction.INSTANCE, request).actionGet();
         client().execute(ExecuteEnrichPolicyAction.INSTANCE, new ExecuteEnrichPolicyAction.Request(policyName)).actionGet();
 
         String pipelineName = "my-pipeline";
         String pipelineBody = "{\"processors\": [{\"enrich\": {\"policy_name\":\"" + policyName +
-            "\", \"set_from\": [{\"source\": \"" + DECORATE_FIELDS[0] + "\", \"target\": \"" + DECORATE_FIELDS[0] + "\"}," +
-            "{\"source\": \"" + DECORATE_FIELDS[1] + "\", \"target\": \"" + DECORATE_FIELDS[1] + "\"}," +
-            "{\"source\": \"" + DECORATE_FIELDS[2] + "\", \"target\": \"" + DECORATE_FIELDS[2] + "\"}" +
-            "]}}]}";
+            "\", \"field\": \"" + MATCH_FIELD + "\", \"target_field\": \"user\"}}]}";
         PutPipelineRequest putPipelineRequest = new PutPipelineRequest(pipelineName, new BytesArray(pipelineBody), XContentType.JSON);
         client().admin().cluster().putPipeline(putPipelineRequest).actionGet();
 
@@ -66,7 +64,7 @@ public class BasicEnrichTests extends ESSingleNodeTestCase {
             IndexRequest indexRequest = new IndexRequest();
             indexRequest.id(Integer.toString(i));
             indexRequest.setPipeline(pipelineName);
-            indexRequest.source(Map.of(KEY_FIELD, keys.get(i)));
+            indexRequest.source(Map.of(MATCH_FIELD, keys.get(i)));
             bulkRequest.add(indexRequest);
         }
         BulkResponse bulkResponse = client().bulk(bulkRequest).actionGet();
@@ -79,11 +77,14 @@ public class BasicEnrichTests extends ESSingleNodeTestCase {
         for (int i = 0; i < numDocs; i++) {
             GetResponse getResponse = client().get(new GetRequest("my-index", Integer.toString(i))).actionGet();
             Map<String, Object> source = getResponse.getSourceAsMap();
-            assertThat(source.size(), equalTo(1 + DECORATE_FIELDS.length));
+            Map<?, ?> userEntry = (Map<?, ?>) source.get("user");
+            assertThat(userEntry, notNullValue());
+            assertThat(userEntry.size(), equalTo(DECORATE_FIELDS.length + 1));
             for (int j = 0; j < 3; j++) {
                 String field = DECORATE_FIELDS[j];
-                assertThat(source.get(field), equalTo(keys.get(i) + j));
+                assertThat(userEntry.get(field), equalTo(keys.get(i) + j));
             }
+            assertThat(keys.contains(userEntry.get(MATCH_FIELD)), is(true));
         }
     }
 
@@ -105,8 +106,7 @@ public class BasicEnrichTests extends ESSingleNodeTestCase {
 
             String pipelineName = "pipeline" + i;
             String pipelineBody = "{\"processors\": [{\"enrich\": {\"policy_name\":\"" + policyName +
-                "\", \"set_from\": [{\"source\": \"value\", \"target\": \"value\"}" +
-                "]}}]}";
+                "\", \"field\": \"key\", \"target_field\": \"target\"}}]}";
             PutPipelineRequest putPipelineRequest = new PutPipelineRequest(pipelineName, new BytesArray(pipelineBody), XContentType.JSON);
             client().admin().cluster().putPipeline(putPipelineRequest).actionGet();
         }
@@ -126,7 +126,7 @@ public class BasicEnrichTests extends ESSingleNodeTestCase {
             GetResponse getResponse = client().get(new GetRequest("my-index", Integer.toString(i))).actionGet();
             Map<String, Object> source = getResponse.getSourceAsMap();
             assertThat(source.size(), equalTo(2));
-            assertThat(source.get("value"), equalTo("val" + i));
+            assertThat(source.get("target"), equalTo(Map.of("key", "key", "value", "val" + i)));
         }
     }
 
@@ -141,7 +141,7 @@ public class BasicEnrichTests extends ESSingleNodeTestCase {
             IndexRequest indexRequest = new IndexRequest(SOURCE_INDEX_NAME);
             indexRequest.create(true);
             indexRequest.id(key);
-            indexRequest.source(Map.of(KEY_FIELD, key, DECORATE_FIELDS[0], key + "0",
+            indexRequest.source(Map.of(MATCH_FIELD, key, DECORATE_FIELDS[0], key + "0",
                 DECORATE_FIELDS[1], key + "1", DECORATE_FIELDS[2], key + "2"));
             client().index(indexRequest).actionGet();
         }

x-pack/plugin/enrich/src/test/java/org/elasticsearch/xpack/enrich/EnrichMultiNodeIT.java

@@ -45,7 +45,7 @@ public class EnrichMultiNodeIT extends ESIntegTestCase {
     static final String POLICY_NAME = "my-policy";
     private static final String PIPELINE_NAME = "my-pipeline";
     static final String SOURCE_INDEX_NAME = "users";
-    static final String KEY_FIELD = "email";
+    static final String MATCH_FIELD = "email";
     static final String[] DECORATE_FIELDS = new String[]{"address", "city", "country"};
 
     @Override
@@ -62,7 +62,7 @@ public class EnrichMultiNodeIT extends ESIntegTestCase {
         for (int i = 0; i < numPolicies; i++) {
             String policyName = POLICY_NAME + i;
             EnrichPolicy enrichPolicy =
-                new EnrichPolicy(EnrichPolicy.EXACT_MATCH_TYPE, null, List.of(SOURCE_INDEX_NAME), KEY_FIELD, List.of(DECORATE_FIELDS));
+                new EnrichPolicy(EnrichPolicy.EXACT_MATCH_TYPE, null, List.of(SOURCE_INDEX_NAME), MATCH_FIELD, List.of(DECORATE_FIELDS));
             PutEnrichPolicyAction.Request request = new PutEnrichPolicyAction.Request(policyName, enrichPolicy);
             client().execute(PutEnrichPolicyAction.INSTANCE, request).actionGet();
             client().execute(ExecuteEnrichPolicyAction.INSTANCE, new ExecuteEnrichPolicyAction.Request(policyName)).actionGet();
@@ -121,7 +121,7 @@ public class EnrichMultiNodeIT extends ESIntegTestCase {
             IndexRequest indexRequest = new IndexRequest();
             indexRequest.id(Integer.toString(i));
             indexRequest.setPipeline(PIPELINE_NAME);
-            indexRequest.source(Map.of(KEY_FIELD, randomFrom(keys)));
+            indexRequest.source(Map.of(MATCH_FIELD, randomFrom(keys)));
             bulkRequest.add(indexRequest);
         }
         BulkResponse bulkResponse = client(coordinatingNode).bulk(bulkRequest).actionGet();
@@ -134,9 +134,11 @@ public class EnrichMultiNodeIT extends ESIntegTestCase {
         for (int i = 0; i < numDocs; i++) {
             GetResponse getResponse = client().get(new GetRequest("my-index", Integer.toString(i))).actionGet();
             Map<String, Object> source = getResponse.getSourceAsMap();
-            assertThat(source.size(), equalTo(1 + DECORATE_FIELDS.length));
+            Map<?, ?> userEntry = (Map<?, ?>) source.get("user");
+            assertThat(userEntry.size(), equalTo(DECORATE_FIELDS.length + 1));
+            assertThat(keys.contains(userEntry.get(MATCH_FIELD)), is(true));
             for (String field : DECORATE_FIELDS) {
-                assertThat(source.get(field), notNullValue());
+                assertThat(userEntry.get(field), notNullValue());
             }
         }
     }
@@ -152,7 +154,7 @@ public class EnrichMultiNodeIT extends ESIntegTestCase {
             IndexRequest indexRequest = new IndexRequest(SOURCE_INDEX_NAME);
             indexRequest.create(true);
             indexRequest.id(key);
-            indexRequest.source(Map.of(KEY_FIELD, key, DECORATE_FIELDS[0], randomAlphaOfLength(4),
+            indexRequest.source(Map.of(MATCH_FIELD, key, DECORATE_FIELDS[0], randomAlphaOfLength(4),
                 DECORATE_FIELDS[1], randomAlphaOfLength(4), DECORATE_FIELDS[2], randomAlphaOfLength(4)));
             client().index(indexRequest).actionGet();
         }
@@ -162,7 +164,7 @@ public class EnrichMultiNodeIT extends ESIntegTestCase {
 
     private static void createAndExecutePolicy() {
         EnrichPolicy enrichPolicy =
-            new EnrichPolicy(EnrichPolicy.EXACT_MATCH_TYPE, null, List.of(SOURCE_INDEX_NAME), KEY_FIELD, List.of(DECORATE_FIELDS));
+            new EnrichPolicy(EnrichPolicy.EXACT_MATCH_TYPE, null, List.of(SOURCE_INDEX_NAME), MATCH_FIELD, List.of(DECORATE_FIELDS));
         PutEnrichPolicyAction.Request request = new PutEnrichPolicyAction.Request(POLICY_NAME, enrichPolicy);
         client().execute(PutEnrichPolicyAction.INSTANCE, request).actionGet();
         client().execute(ExecuteEnrichPolicyAction.INSTANCE, new ExecuteEnrichPolicyAction.Request(POLICY_NAME)).actionGet();
@@ -170,10 +172,7 @@ public class EnrichMultiNodeIT extends ESIntegTestCase {
 
     private static void createPipeline() {
         String pipelineBody = "{\"processors\": [{\"enrich\": {\"policy_name\":\"" + POLICY_NAME +
-            "\", \"set_from\": [{\"source\": \"" + DECORATE_FIELDS[0] + "\", \"target\": \"" + DECORATE_FIELDS[0] + "\"}," +
-            "{\"source\": \"" + DECORATE_FIELDS[1] + "\", \"target\": \"" + DECORATE_FIELDS[1] + "\"}," +
-            "{\"source\": \"" + DECORATE_FIELDS[2] + "\", \"target\": \"" + DECORATE_FIELDS[2] + "\"}" +
-            "]}}]}";
+            "\", \"field\": \"" + MATCH_FIELD + "\", \"target_field\": \"user\"}}]}";
         PutPipelineRequest request = new PutPipelineRequest(PIPELINE_NAME, new BytesArray(pipelineBody), XContentType.JSON);
         client().admin().cluster().putPipeline(request).actionGet();
     }

x-pack/plugin/enrich/src/test/java/org/elasticsearch/xpack/enrich/EnrichPolicyUpdateTests.java

@@ -41,7 +41,8 @@ public class EnrichPolicyUpdateTests extends ESSingleNodeTestCase {
         assertAcked(client().execute(PutEnrichPolicyAction.INSTANCE, putPolicyRequest).actionGet());
         assertThat(enrichProcessorFactory.policies.get("my_policy"), equalTo(instance1));
 
-        String pipelineConfig = "{\"processors\":[{\"enrich\": {\"policy_name\": \"my_policy\", \"targets\": [\"field1\"]}}]}";
+        String pipelineConfig =
+            "{\"processors\":[{\"enrich\": {\"policy_name\": \"my_policy\", \"field\": \"key\", \"target_field\": \"target\"}}]}";
         PutPipelineRequest putPipelineRequest = new PutPipelineRequest("1", new BytesArray(pipelineConfig), XContentType.JSON);
         assertAcked(client().admin().cluster().putPipeline(putPipelineRequest).actionGet());
         Pipeline pipelineInstance1 = ingestService.getPipeline("1");

x-pack/plugin/enrich/src/test/java/org/elasticsearch/xpack/enrich/EnrichProcessorFactoryTests.java

@@ -9,7 +9,6 @@ import org.elasticsearch.ElasticsearchParseException;
 import org.elasticsearch.common.collect.Tuple;
 import org.elasticsearch.test.ESTestCase;
 import org.elasticsearch.xpack.core.enrich.EnrichPolicy;
-import org.elasticsearch.xpack.enrich.EnrichProcessorFactory.EnrichSpecification;
 
 import java.util.ArrayList;
 import java.util.Collections;
@@ -32,7 +31,8 @@ public class EnrichProcessorFactoryTests extends ESTestCase {
 
         Map<String, Object> config = new HashMap<>();
         config.put("policy_name", "majestic");
-        config.put("enrich_key", "host");
+        config.put("field", "host");
+        config.put("target_field", "entry");
         boolean keyIgnoreMissing = randomBoolean();
         if (keyIgnoreMissing || randomBoolean()) {
             config.put("ignore_missing", keyIgnoreMissing);
@@ -49,29 +49,18 @@ public class EnrichProcessorFactoryTests extends ESTestCase {
             randomValues.add(new Tuple<>(randomFrom(enrichValues), randomAlphaOfLength(4)));
         }
 
-        List<Map<String, Object>> valuesConfig = new ArrayList<>(numRandomValues);
-        for (Tuple<String, String> tuple : randomValues) {
-            valuesConfig.add(Map.of("source", tuple.v1(), "target", tuple.v2()));
-        }
-        config.put("set_from", valuesConfig);
-
         ExactMatchProcessor result = (ExactMatchProcessor) factory.create(Collections.emptyMap(), "_tag", config);
         assertThat(result, notNullValue());
         assertThat(result.getPolicyName(), equalTo("majestic"));
-        assertThat(result.getEnrichKey(), equalTo("host"));
+        assertThat(result.getField(), equalTo("host"));
+        assertThat(result.getTargetField(), equalTo("entry"));
+        assertThat(result.getMatchField(), equalTo("my_key"));
         assertThat(result.isIgnoreMissing(), is(keyIgnoreMissing));
         if (overrideEnabled != null) {
             assertThat(result.isOverrideEnabled(), is(overrideEnabled));
         } else {
             assertThat(result.isOverrideEnabled(), is(true));
         }
-        assertThat(result.getSpecifications().size(), equalTo(numRandomValues));
-        for (int i = 0; i < numRandomValues; i++) {
-            EnrichSpecification actual = result.getSpecifications().get(i);
-            Tuple<String, String> expected = randomValues.get(i);
-            assertThat(actual.sourceField, equalTo(expected.v1()));
-            assertThat(actual.targetField, equalTo(expected.v2()));
-        }
     }
 
     public void testPolicyDoesNotExist() {
@@ -140,45 +129,17 @@ public class EnrichProcessorFactoryTests extends ESTestCase {
 
         Map<String, Object> config = new HashMap<>();
         config.put("policy_name", "majestic");
-        config.put("enrich_key", "host");
+        config.put("field", "host");
+        config.put("target_field", "entry");
         boolean keyIgnoreMissing = randomBoolean();
         if (keyIgnoreMissing || randomBoolean()) {
             config.put("ignore_missing", keyIgnoreMissing);
         }
 
-        int numRandomValues = randomIntBetween(1, 8);
-        List<Tuple<String, String>> randomValues = new ArrayList<>(numRandomValues);
-        for (int i = 0; i < numRandomValues; i++) {
-            randomValues.add(new Tuple<>(randomFrom(enrichValues), randomAlphaOfLength(4)));
-        }
-
-        List<Map<String, Object>> valuesConfig = new ArrayList<>(numRandomValues);
-        for (Tuple<String, String> tuple : randomValues) {
-            valuesConfig.add(Map.of("source", tuple.v1(), "target", tuple.v2()));
-        }
-        config.put("set_from", valuesConfig);
-
         Exception e = expectThrows(IllegalArgumentException.class, () -> factory.create(Collections.emptyMap(), "_tag", config));
         assertThat(e.getMessage(), equalTo("unsupported policy type [unsupported]"));
     }
 
-    public void testNonExistingDecorateField() {
-        List<String> enrichValues = List.of("globalRank", "tldRank", "tld");
-        EnrichPolicy policy = new EnrichPolicy(EnrichPolicy.EXACT_MATCH_TYPE, null, List.of("source_index"), "my_key",
-            enrichValues);
-        EnrichProcessorFactory factory = new EnrichProcessorFactory(null);
-        factory.policies = Map.of("majestic", policy);
-
-        Map<String, Object> config = new HashMap<>();
-        config.put("policy_name", "majestic");
-        config.put("enrich_key", "host");
-        List<Map<String, Object>> valuesConfig = List.of(Map.of("source", "rank", "target", "rank"));
-        config.put("set_from", valuesConfig);
-
-        Exception e = expectThrows(IllegalArgumentException.class, () -> factory.create(Collections.emptyMap(), "_tag", config));
-        assertThat(e.getMessage(), equalTo("source field [rank] does not exist in policy [majestic]"));
-    }
-
     public void testCompactEnrichValuesFormat() throws Exception {
         List<String> enrichValues = List.of("globalRank", "tldRank", "tld");
         EnrichPolicy policy = new EnrichPolicy(EnrichPolicy.EXACT_MATCH_TYPE, null, List.of("source_index"), "host",
@@ -188,22 +149,17 @@ public class EnrichProcessorFactoryTests extends ESTestCase {
 
         Map<String, Object> config = new HashMap<>();
         config.put("policy_name", "majestic");
-        config.put("targets", enrichValues);
+        config.put("field", "host");
+        config.put("target_field", "entry");
 
         ExactMatchProcessor result = (ExactMatchProcessor) factory.create(Collections.emptyMap(), "_tag", config);
         assertThat(result, notNullValue());
         assertThat(result.getPolicyName(), equalTo("majestic"));
-        assertThat(result.getEnrichKey(), equalTo("host"));
-        assertThat(result.getSpecifications().size(), equalTo(enrichValues.size()));
-        for (int i = 0; i < enrichValues.size(); i++) {
-            EnrichSpecification actual = result.getSpecifications().get(i);
-            String expected = enrichValues.get(i);
-            assertThat(actual.sourceField, equalTo(expected));
-            assertThat(actual.targetField, equalTo(expected));
-        }
+        assertThat(result.getField(), equalTo("host"));
+        assertThat(result.getTargetField(), equalTo("entry"));
     }
 
-    public void testNoEnrichValues() throws Exception {
+    public void testNoTargetField() throws Exception {
         List<String> enrichValues = List.of("globalRank", "tldRank", "tld");
         EnrichPolicy policy = new EnrichPolicy(EnrichPolicy.EXACT_MATCH_TYPE, null, List.of("source_index"), "host",
             enrichValues);
@@ -212,16 +168,10 @@ public class EnrichProcessorFactoryTests extends ESTestCase {
 
         Map<String, Object> config1 = new HashMap<>();
         config1.put("policy_name", "majestic");
-        config1.put("set_from", List.of());
-
-        Exception e = expectThrows(IllegalArgumentException.class, () -> factory.create(Collections.emptyMap(), "_tag", config1));
-        assertThat(e.getMessage(), equalTo("provided set_from is empty"));
+        config1.put("field", "host");
 
-        Map<String, Object> config2 = new HashMap<>();
-        config2.put("policy_name", "majestic");
-        config2.put("targets", List.of());
-        e = expectThrows(IllegalArgumentException.class, () -> factory.create(Collections.emptyMap(), "_tag", config2));
-        assertThat(e.getMessage(), equalTo("provided targets is empty"));
+        Exception e = expectThrows(ElasticsearchParseException.class, () -> factory.create(Collections.emptyMap(), "_tag", config1));
+        assertThat(e.getMessage(), equalTo("[target_field] required property is missing"));
     }
 
 }

x-pack/plugin/enrich/src/test/java/org/elasticsearch/xpack/enrich/EnrichRestartIT.java

@@ -17,7 +17,7 @@ import java.util.List;
 import java.util.Optional;
 
 import static org.elasticsearch.xpack.enrich.EnrichMultiNodeIT.DECORATE_FIELDS;
-import static org.elasticsearch.xpack.enrich.EnrichMultiNodeIT.KEY_FIELD;
+import static org.elasticsearch.xpack.enrich.EnrichMultiNodeIT.MATCH_FIELD;
 import static org.elasticsearch.xpack.enrich.EnrichMultiNodeIT.POLICY_NAME;
 import static org.elasticsearch.xpack.enrich.EnrichMultiNodeIT.SOURCE_INDEX_NAME;
 import static org.hamcrest.Matchers.equalTo;
@@ -36,7 +36,7 @@ public class EnrichRestartIT extends ESIntegTestCase {
         internalCluster().startNode();
 
         EnrichPolicy enrichPolicy =
-            new EnrichPolicy(EnrichPolicy.EXACT_MATCH_TYPE, null, List.of(SOURCE_INDEX_NAME), KEY_FIELD, List.of(DECORATE_FIELDS));
+            new EnrichPolicy(EnrichPolicy.EXACT_MATCH_TYPE, null, List.of(SOURCE_INDEX_NAME), MATCH_FIELD, List.of(DECORATE_FIELDS));
         for (int i = 0; i < numPolicies; i++) {
             String policyName = POLICY_NAME + i;
             PutEnrichPolicyAction.Request request = new PutEnrichPolicyAction.Request(policyName, enrichPolicy);

x-pack/plugin/enrich/src/test/java/org/elasticsearch/xpack/enrich/ExactMatchProcessorTests.java

@@ -27,18 +27,16 @@ import org.elasticsearch.search.SearchHits;
 import org.elasticsearch.search.aggregations.Aggregations;
 import org.elasticsearch.search.suggest.Suggest;
 import org.elasticsearch.test.ESTestCase;
-import org.elasticsearch.xpack.enrich.EnrichProcessorFactory.EnrichSpecification;
 
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.UncheckedIOException;
 import java.util.Collections;
 import java.util.HashMap;
-import java.util.List;
 import java.util.Map;
 import java.util.function.BiConsumer;
 
-import static org.hamcrest.Matchers.arrayContainingInAnyOrder;
+import static org.hamcrest.Matchers.emptyArray;
 import static org.hamcrest.Matchers.equalTo;
 import static org.hamcrest.Matchers.instanceOf;
 import static org.hamcrest.Matchers.notNullValue;
@@ -48,8 +46,7 @@ public class ExactMatchProcessorTests extends ESTestCase {
 
     public void testBasics() throws Exception {
         MockSearchFunction mockSearch = mockedSearchFunction(Map.of("elastic.co", Map.of("globalRank", 451, "tldRank",23, "tld", "co")));
-        ExactMatchProcessor processor = new ExactMatchProcessor("_tag", mockSearch, "_name", "domain", false, true,
-            List.of(new EnrichSpecification("tldRank", "tld_rank"), new EnrichSpecification("tld", "tld")));
+        ExactMatchProcessor processor = new ExactMatchProcessor("_tag", mockSearch, "_name", "domain", "entry", "domain", false, true);
         IngestDocument ingestDocument = new IngestDocument("_index", "_type", "_id", "_routing", 1L, VersionType.INTERNAL,
             Map.of("domain", "elastic.co"));
         // Run
@@ -64,21 +61,24 @@ public class ExactMatchProcessorTests extends ESTestCase {
         assertThat(request.source().size(), equalTo(1));
         assertThat(request.source().trackScores(), equalTo(false));
         assertThat(request.source().fetchSource().fetchSource(), equalTo(true));
-        assertThat(request.source().fetchSource().includes(), arrayContainingInAnyOrder("tldRank", "tld"));
+        assertThat(request.source().fetchSource().excludes(), emptyArray());
+        assertThat(request.source().fetchSource().includes(), emptyArray());
         assertThat(request.source().query(), instanceOf(ConstantScoreQueryBuilder.class));
         assertThat(((ConstantScoreQueryBuilder) request.source().query()).innerQuery(), instanceOf(TermQueryBuilder.class));
         TermQueryBuilder termQueryBuilder = (TermQueryBuilder) ((ConstantScoreQueryBuilder) request.source().query()).innerQuery();
         assertThat(termQueryBuilder.fieldName(), equalTo("domain"));
         assertThat(termQueryBuilder.value(), equalTo("elastic.co"));
         // Check result
-        assertThat(ingestDocument.getFieldValue("tld_rank", Integer.class), equalTo(23));
-        assertThat(ingestDocument.getFieldValue("tld", String.class), equalTo("co"));
+        Map<?, ?> entry = ingestDocument.getFieldValue("entry", Map.class);
+        assertThat(entry.size(), equalTo(3));
+        assertThat(entry.get("globalRank"), equalTo(451));
+        assertThat(entry.get("tldRank"), equalTo(23));
+        assertThat(entry.get("tld"), equalTo("co"));
     }
 
     public void testNoMatch() throws Exception {
         MockSearchFunction mockSearch = mockedSearchFunction();
-        ExactMatchProcessor processor = new ExactMatchProcessor("_tag", mockSearch, "_name", "domain", false, true,
-            List.of(new EnrichSpecification("tldRank", "tld_rank"), new EnrichSpecification("tld", "tld")));
+        ExactMatchProcessor processor = new ExactMatchProcessor("_tag", mockSearch, "_name", "domain", "entry", "domain", false, true);
         IngestDocument ingestDocument = new IngestDocument("_index", "_type", "_id", "_routing", 1L, VersionType.INTERNAL,
             Map.of("domain", "elastic.com"));
         int numProperties = ingestDocument.getSourceAndMetadata().size();
@@ -94,7 +94,8 @@ public class ExactMatchProcessorTests extends ESTestCase {
         assertThat(request.source().size(), equalTo(1));
         assertThat(request.source().trackScores(), equalTo(false));
         assertThat(request.source().fetchSource().fetchSource(), equalTo(true));
-        assertThat(request.source().fetchSource().includes(), arrayContainingInAnyOrder("tldRank", "tld"));
+        assertThat(request.source().fetchSource().includes(), emptyArray());
+        assertThat(request.source().fetchSource().excludes(), emptyArray());
         assertThat(request.source().query(), instanceOf(ConstantScoreQueryBuilder.class));
         assertThat(((ConstantScoreQueryBuilder) request.source().query()).innerQuery(), instanceOf(TermQueryBuilder.class));
         TermQueryBuilder termQueryBuilder = (TermQueryBuilder) ((ConstantScoreQueryBuilder) request.source().query()).innerQuery();
@@ -107,8 +108,7 @@ public class ExactMatchProcessorTests extends ESTestCase {
     public void testSearchFailure() throws Exception {
         String indexName = ".enrich-_name";
         MockSearchFunction mockSearch = mockedSearchFunction(new IndexNotFoundException(indexName));
-        ExactMatchProcessor processor = new ExactMatchProcessor("_tag", mockSearch, "_name", "domain", false, true,
-            List.of(new EnrichSpecification("tldRank", "tld_rank"), new EnrichSpecification("tld", "tld")));
+        ExactMatchProcessor processor = new ExactMatchProcessor("_tag", mockSearch, "_name", "domain", "entry", "domain", false, true);
         IngestDocument ingestDocument = new IngestDocument("_index", "_type", "_id", "_routing", 1L, VersionType.INTERNAL,
             Map.of("domain", "elastic.com"));
         // Run
@@ -129,7 +129,8 @@ public class ExactMatchProcessorTests extends ESTestCase {
         assertThat(request.source().size(), equalTo(1));
         assertThat(request.source().trackScores(), equalTo(false));
         assertThat(request.source().fetchSource().fetchSource(), equalTo(true));
-        assertThat(request.source().fetchSource().includes(), arrayContainingInAnyOrder("tldRank", "tld"));
+        assertThat(request.source().fetchSource().includes(), emptyArray());
+        assertThat(request.source().fetchSource().excludes(), emptyArray());
         assertThat(request.source().query(), instanceOf(ConstantScoreQueryBuilder.class));
         assertThat(((ConstantScoreQueryBuilder) request.source().query()).innerQuery(), instanceOf(TermQueryBuilder.class));
         TermQueryBuilder termQueryBuilder = (TermQueryBuilder) ((ConstantScoreQueryBuilder) request.source().query()).innerQuery();
@@ -141,8 +142,8 @@ public class ExactMatchProcessorTests extends ESTestCase {
 
     public void testIgnoreKeyMissing() throws Exception {
         {
-            ExactMatchProcessor processor = new ExactMatchProcessor("_tag", mockedSearchFunction(), "_name", "domain",
-                true, true, List.of(new EnrichSpecification("tldRank", "tld_rank"), new EnrichSpecification("tld", "tld")));
+            ExactMatchProcessor processor =
+                new ExactMatchProcessor("_tag", mockedSearchFunction(), "_name", "domain", "entry", "domain", true, true);
             IngestDocument ingestDocument = new IngestDocument("_index", "_type", "_id", "_routing", 1L, VersionType.INTERNAL, Map.of());
 
             assertThat(ingestDocument.getSourceAndMetadata().size(), equalTo(6));
@@ -152,8 +153,8 @@ public class ExactMatchProcessorTests extends ESTestCase {
             assertThat(ingestDocument.getSourceAndMetadata().size(), equalTo(6));
         }
         {
-            ExactMatchProcessor processor = new ExactMatchProcessor("_tag", mockedSearchFunction(), "_name", "domain",
-                false, true, List.of(new EnrichSpecification("tldRank", "tld_rank"), new EnrichSpecification("tld", "tld")));
+            ExactMatchProcessor processor =
+                new ExactMatchProcessor("_tag", mockedSearchFunction(), "_name", "domain", "entry", "domain", false, true);
             IngestDocument ingestDocument = new IngestDocument("_index", "_type", "_id", "_routing", 1L, VersionType.INTERNAL, Map.of());
             IngestDocument[] resultHolder = new IngestDocument[1];
             Exception[] exceptionHolder = new Exception[1];
@@ -169,8 +170,7 @@ public class ExactMatchProcessorTests extends ESTestCase {
 
     public void testExistingFieldWithOverrideDisabled() throws Exception {
         MockSearchFunction mockSearch = mockedSearchFunction(Map.of("elastic.co", Map.of("globalRank", 451, "tldRank",23, "tld", "co")));
-        ExactMatchProcessor processor = new ExactMatchProcessor("_tag", mockSearch, "_name", "domain", false, false,
-            List.of(new EnrichSpecification("tld", "tld")));
+        ExactMatchProcessor processor = new ExactMatchProcessor("_tag", mockSearch, "_name", "domain", "entry", "domain", false, false);
 
         IngestDocument ingestDocument = new IngestDocument(new HashMap<>(Map.of("domain", "elastic.co", "tld", "tld")), Map.of());
         IngestDocument[] resultHolder = new IngestDocument[1];
@@ -186,8 +186,7 @@ public class ExactMatchProcessorTests extends ESTestCase {
 
     public void testExistingNullFieldWithOverrideDisabled() throws Exception {
         MockSearchFunction mockSearch = mockedSearchFunction(Map.of("elastic.co", Map.of("globalRank", 451, "tldRank",23, "tld", "co")));
-        ExactMatchProcessor processor = new ExactMatchProcessor("_tag", mockSearch, "_name", "domain", false, false,
-            List.of(new EnrichSpecification("tld", "tld")));
+        ExactMatchProcessor processor = new ExactMatchProcessor("_tag", mockSearch, "_name", "domain", "entry", "domain", false, false);
 
         Map<String, Object> source = new HashMap<>();
         source.put("domain", "elastic.co");