Github user nickwallen commented on a diff in the pull request:
https://github.com/apache/metron/pull/1242#discussion_r227778399
--- Diff:
metron-platform/metron-elasticsearch/src/main/java/org/apache/metron/elasticsearch/client/ElasticsearchClient.java
---
@@ -0,0 +1,147 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.metron.elasticsearch.client;
+
+import com.google.common.base.Joiner;
+import com.google.common.base.Splitter;
+import com.google.common.collect.Iterables;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import org.apache.commons.io.IOUtils;
+import org.apache.commons.lang3.StringUtils;
+import org.apache.http.HttpEntity;
+import org.apache.http.entity.StringEntity;
+import org.apache.metron.common.utils.JSONUtils;
+import org.apache.metron.elasticsearch.utils.FieldMapping;
+import org.apache.metron.elasticsearch.utils.FieldProperties;
+import org.elasticsearch.client.Response;
+import org.elasticsearch.client.RestClient;
+import org.elasticsearch.client.RestHighLevelClient;
+
+/**
+ * Wrapper around the Elasticsearch REST clients. Exposes capabilities of
the low and high-level clients.
+ */
+public class ElasticsearchClient implements AutoCloseable{
--- End diff --
Any wisdom or linkage to help developers understand when they should use
the high-level versus low-level client?
---
