Add toString() to MultiSearchRequest class.

CHANGELOG.md

@@ -95,6 +95,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Add support for dependencies in plugin descriptor properties with semver range ([#11441](https://github.com/opensearch-project/OpenSearch/pull/11441))
 - Add community_id ingest processor ([#12121](https://github.com/opensearch-project/OpenSearch/pull/12121))
 - Introduce query level setting `index.query.max_nested_depth` limiting nested queries ([#3268](https://github.com/opensearch-project/OpenSearch/issues/3268)
+- Add toString methods to MultiSearchRequest, MultiGetRequest and CreateIndexRequest ([#12163](https://github.com/opensearch-project/OpenSearch/pull/12163))
 
 ### Dependencies
 

server/src/main/java/org/opensearch/action/admin/indices/create/CreateIndexRequest.java

@@ -594,4 +594,25 @@ public void writeTo(StreamOutput out) throws IOException {
         }
         waitForActiveShards.writeTo(out);
     }
+
+    @Override
+    public String toString() {
+        return "CreateIndexRequest{"
+            + "cause='"
+            + cause
+            + '\''
+            + ", index='"
+            + index
+            + '\''
+            + ", settings="
+            + settings
+            + ", mappings='"
+            + mappings
+            + '\''
+            + ", aliases="
+            + aliases
+            + ", waitForActiveShards="
+            + waitForActiveShards
+            + '}';
+    }
 }

server/src/main/java/org/opensearch/action/get/MultiGetRequest.java

@@ -583,4 +583,19 @@ public XContentBuilder toXContent(XContentBuilder builder, Params params) throws
         return builder;
     }
 
+    @Override
+    public String toString() {
+        return "MultiGetRequest{"
+            + "preference='"
+            + preference
+            + '\''
+            + ", realtime="
+            + realtime
+            + ", refresh="
+            + refresh
+            + ", items="
+            + items
+            + '}';
+    }
+
 }

server/src/main/java/org/opensearch/action/search/MultiSearchRequest.java

@@ -398,4 +398,16 @@ public boolean shouldCancelChildrenOnCancellation() {
             }
         };
     }
+
+    @Override
+    public String toString() {
+        return "MultiSearchRequest{"
+            + "maxConcurrentSearchRequests="
+            + maxConcurrentSearchRequests
+            + ", requests="
+            + requests
+            + ", indicesOptions="
+            + indicesOptions
+            + '}';
+    }
 }

server/src/test/java/org/opensearch/action/admin/indices/create/CreateIndexRequestTests.java

@@ -50,6 +50,7 @@
 import java.util.Map;
 import java.util.Set;
 
+import static org.hamcrest.CoreMatchers.containsString;
 import static org.hamcrest.CoreMatchers.equalTo;
 
 public class CreateIndexRequestTests extends OpenSearchTestCase {
@@ -150,6 +151,20 @@ public void testSettingsType() throws IOException {
         assertThat(e.getMessage(), equalTo("key [settings] must be an object"));
     }
 
+    public void testToString() throws IOException {
+        CreateIndexRequest request = new CreateIndexRequest("foo");
+        String mapping = JsonXContent.contentBuilder()
+            .startObject()
+            .startObject(MapperService.SINGLE_MAPPING_NAME)
+            .endObject()
+            .endObject()
+            .toString();
+        request.mapping(mapping);
+
+        assertThat(request.toString(), containsString("index='foo'"));
+        assertThat(request.toString(), containsString("mappings='{\"_doc\":{}}'"));
+    }
+
     public static void assertMappingsEqual(Map<String, String> expected, Map<String, String> actual) throws IOException {
         assertEquals(expected.keySet(), actual.keySet());
 

server/src/test/java/org/opensearch/action/get/MultiGetRequestTests.java

@@ -32,6 +32,7 @@
 
 package org.opensearch.action.get;
 
+import org.opensearch.action.get.MultiGetRequest.Item;
 import org.opensearch.common.xcontent.XContentFactory;
 import org.opensearch.common.xcontent.XContentType;
 import org.opensearch.core.common.ParsingException;
@@ -141,6 +142,13 @@ public void testXContentSerialization() throws IOException {
         }
     }
 
+    public void testToString() {
+        MultiGetRequest req = createTestInstance();
+        for (Item items : req.getItems()) {
+            assertThat(req.toString(), containsString(items.toString()));
+        }
+    }
+
     private MultiGetRequest createTestInstance() {
         int numItems = randomIntBetween(0, 128);
         MultiGetRequest request = new MultiGetRequest();

server/src/test/java/org/opensearch/action/search/MultiSearchRequestTests.java

@@ -73,6 +73,7 @@
 import static java.util.Collections.singletonList;
 import static org.opensearch.search.RandomSearchRequestGenerator.randomSearchRequest;
 import static org.opensearch.test.EqualsHashCodeTestUtils.checkEqualsAndHashCode;
+import static org.hamcrest.Matchers.containsString;
 import static org.hamcrest.Matchers.equalTo;
 import static org.hamcrest.Matchers.instanceOf;
 import static org.hamcrest.Matchers.is;
@@ -560,6 +561,13 @@ public void testEqualsAndHashcode() {
         checkEqualsAndHashCode(createMultiSearchRequest(), MultiSearchRequestTests::copyRequest, MultiSearchRequestTests::mutate);
     }
 
+    public void testToString() {
+        MultiSearchRequest req = createMultiSearchRequest();
+        for (SearchRequest subReq : req.requests()) {
+            assertThat(req.toString(), containsString(subReq.toString()));
+        }
+    }
+
     private static MultiSearchRequest mutate(MultiSearchRequest searchRequest) throws IOException {
         MultiSearchRequest mutation = copyRequest(searchRequest);
         List<CheckedRunnable<IOException>> mutators = new ArrayList<>();