[Feature/extensions] Create Detector Workflow

build.gradle

@@ -129,7 +129,7 @@ configurations.all {
     resolutionStrategy {
         force "joda-time:joda-time:2.10.13"
         force "commons-logging:commons-logging:1.2"
-        force "org.apache.httpcomponents:httpcore:4.4.15"
+        force "org.apache.httpcomponents:httpcore5:5.1.4"
         force "commons-codec:commons-codec:1.15"
 
         force "org.mockito:mockito-core:2.25.0"
@@ -757,6 +757,8 @@ dependencies {
 //    implementation "org.opensearch:common-utils:${common_utils_version}"
     implementation "org.opensearch:opensearch-sdk-java:1.0.0-SNAPSHOT"
     implementation "org.opensearch.client:opensearch-rest-client:${opensearch_version}"
+    implementation "org.opensearch.client:opensearch-java:${opensearch_version}"
+    implementation "org.opensearch.client:opensearch-rest-client:${opensearch_version}"
     implementation group: 'com.google.guava', name: 'guava', version:'31.0.1-jre'
     implementation group: 'com.google.guava', name: 'failureaccess', version:'1.0.1'
     implementation group: 'org.javassist', name: 'javassist', version:'3.28.0-GA'

src/main/java/org/opensearch/ad/AnomalyDetectorExtension.java

@@ -3,18 +3,23 @@
 import static java.util.Collections.unmodifiableList;
 
 import java.io.IOException;
+import java.util.Collection;
 import java.util.List;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
 import org.opensearch.ad.rest.RestCreateDetectorAction;
 import org.opensearch.ad.settings.AnomalyDetectorSettings;
 import org.opensearch.ad.settings.EnabledSetting;
+import org.opensearch.client.opensearch.OpenSearchClient;
+import org.opensearch.cluster.service.ClusterService;
 import org.opensearch.common.settings.Setting;
 import org.opensearch.sdk.Extension;
 import org.opensearch.sdk.ExtensionRestHandler;
 import org.opensearch.sdk.ExtensionSettings;
 import org.opensearch.sdk.ExtensionsRunner;
+import org.opensearch.sdk.SDKClient;
+import org.opensearch.threadpool.ThreadPool;
 
 import com.google.common.collect.ImmutableList;
 
@@ -83,6 +88,11 @@ public List<Setting<?>> getSettings() {
         );
     }
 
+    @Override
+    public Collection<Object> createComponents(SDKClient sdkClient, ClusterService clusterService, ThreadPool threadPool) {
+        return null;
+    }
+
     private static ExtensionSettings initializeSettings() throws IOException {
         ExtensionSettings settings = Extension.readSettingsFromYaml(EXTENSION_SETTINGS_PATH);
         if (settings == null || settings.getHostAddress() == null || settings.getHostPort() == null) {
@@ -91,6 +101,12 @@ private static ExtensionSettings initializeSettings() throws IOException {
         return settings;
     }
 
+    public OpenSearchClient getClient() {
+        SDKClient sdkClient = new SDKClient();
+        OpenSearchClient client = sdkClient.initializeClient("localhost", 9200);
+        return client;
+    }
+
     public static void main(String[] args) throws IOException {
         // Execute this extension by instantiating it and passing to ExtensionsRunner
         ExtensionsRunner.run(new AnomalyDetectorExtension());

src/main/java/org/opensearch/ad/auth/UserIdentity.java

@@ -14,7 +14,8 @@
 import java.util.Map;
 import java.util.Objects;
 
-import org.apache.http.util.EntityUtils;
+import org.apache.hc.core5.http.ParseException;
+import org.apache.hc.core5.http.io.entity.EntityUtils;
 import org.opensearch.client.Response;
 import org.opensearch.common.Nullable;
 import org.opensearch.common.Strings;
@@ -110,7 +111,7 @@ public UserIdentity(
      * @param response  The security plugin response.
      * @throws IOException  If there was an error receiving the response.
      */
-    public UserIdentity(final Response response) throws IOException {
+    public UserIdentity(final Response response) throws IOException, ParseException {
         this(EntityUtils.toString(response.getEntity()));
     }
 

src/main/java/org/opensearch/ad/model/AnomalyDetector.java

@@ -65,15 +65,14 @@
  *      in code rather than config it in anomaly-detection-state.json file.
  */
 public class AnomalyDetector implements Writeable, ToXContentObject {
-
     public static final String PARSE_FIELD_NAME = "AnomalyDetector";
     public static final NamedXContentRegistry.Entry XCONTENT_REGISTRY = new NamedXContentRegistry.Entry(
         AnomalyDetector.class,
         new ParseField(PARSE_FIELD_NAME),
         it -> parse(it)
     );
     public static final String NO_ID = "";
-    public static final String ANOMALY_DETECTORS_INDEX = ".opendistro-anomaly-detectors";
+    public static final String ANOMALY_DETECTORS_INDEX = "opendistro-anomaly-detectors";
     public static final String TYPE = "_doc";
     public static final String QUERY_PARAM_PERIOD_START = "period_start";
     public static final String QUERY_PARAM_PERIOD_END = "period_end";